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Publikationen

2023

Schwarz, Heiko
Experimentelle Charakterisierung des Dichtverhaltens von Bürstendichtungen
2. virtual-Engine-Kolloquium; 24.-25.01.2023; Augsburg – Konferenzbeitrag

Keuter, R.J.; Kirsch, B.; Friedrichs, J.; Ponick, B.:
Design Decisions for a Powertrain Combination of Electric Motor and Propeller for an Electric Aircraft
IEEE Access, vol. 11, pp. 79144-79155, 2023, doi: 10.1109/ACCESS.2023.3299816

Nicolay, S.; Fritsche, L.; Lück, S.; Friedrichs, J.; Doering, R.:
Development and Evaluation of Strategies for Parallel Operation of Fuel Cell Stacks
Deutscher Luft- und Raumfahrtkongress 2022, Dresden – Veröffentlicht 12.07.2023
Doi: 10.25967/570412

Wilken, A.; Willneff, J.; Rodeck, R.; Wende, G.; Friedrichs, J.:
Localisation of Ultrasonic NDT Data Using Hybrid Tracking of Component and Probe
Journal of Nondestructive Evaluation (2023), DOI: 10.1007/s10921-023-00976-4

Sukhman, D.; Lück, S.; Göing, J.; Bartl, J.; Hansen, T.; Stenfeld, G.; Friedrichs, J.:
Layout and yaw optimisation of an offshore wind farm through analytical modeling
EERA DeepWind Conference, 18.-20. Januar 2023

Kösters, T.L.; Graf von Schweinitz, A.; Heere, M.; Friedrichs, J.; Gao, X.:
Experimental study and simulations of hydrogen cooling effectiveness for aviation PEM fuel cells
Sci Rep 13, 23016 (2023). https://doi.org/10.1038/s41598-023-49309-5

Oldeweme J.; Lindner T.; Scholz P.; Friedrichs J.:
Experiment Design for a Distributed Propulsion Configuration at High Lift Deutscher Luft- und Raumfahrtkongress (DLRK), 2022

Lindner T. K.; Oldeweme J.; Scholz P.; Friedrichs J.:
Experimental Propeller Placement Analysis for a Distributed Propulsion Wing Section in High Lift Configuration
AIAA AVIATION 2023 Forum, 2023

Oldeweme J.; Lindner T.; Scholz P.; Friedrichs J.:
Experimental Propeller Performance Analysis on a Large Scale Distributed Propulsion
Configuration at High Lift, International Gas Turbine Congress (IGTC), 2023

Lindner T.; Oldeweme J.; Scholz P.; Friedrichs J.:
System Performance of Wing and Propeller in a Periodic Distributed Propulsion
Experiment (European Aeronautics Science Network (EASN),2023

Oldeweme J.; Lindner T.; Scholz P.; Friedrichs J.:
Experimental Propeller Performance Analysis of Distributed, Single and Isolated Configurations
European Aeronautics Science Network (EASN), 2023

Lindner T.; Oldeweme J.; Sotomayor D.; Scholz P.; Friedrichs J..:
Large Scale Distributed Propulsion Experiment on Propeller-Wing Interactions
Deutscher Luft- und Raumfahrtkongress (DLRK), 2023

Benjamin, Legin; Friedrichs, J.; Wegener, P.; Mαrquez Gutiérrez, C.O.; Heykena, C:
Nacelle 3D Aerodynamic Design and Airframe Integration for an Over Wing Configuration
AIAA SCITECH 2023 Forum, 10.2514/6.2023-1651

Witte, H.; Bode, C.; Friedrichs, J.:
Potential of Static Pressure Recovery of Rotor-Only Low-Pressure Axial Fans International Journal of Turbomachinery, Propulsion and Power, 8(3), 33, 2023 https://doi.org/10.3390/ijtpp8030033

Kirsch, B.; Friedrichs, J.:
Deriving Sensitivities of Distributed Propeller Propulsion in Overwing Configuration by using DoE in CFD Simulations Proceedings of Global Power and Propulsion Society, 2023

Kirsch, B.; Friedrichs, J.:
CFD Parameter Studies using an Actuator Disk to quantify the Interactions on an Airfoil Segment for Distributed Propulsion
Proceedings of the ASME 2023, Turbomachinery Technical Conference and Exposition

Schollenberger, M.; Kern, M.; Kirsch, B.; Lutz, T.; Krämer, E.; Friedrichs, J.:
Energy Saving Potential of Aerodynamic Optimized Propeller-Driven Configuration in Dependence of Aircraft-Size
Deutscher Luft- und Raumfahrtkongress, 2023 – Konferenzbeitrag

Keuter, R.J.; Kirsch, B.; Friedrichs, J.; Ponick, B.:
Design Decisions for a Powertrain Combination of Electric Motor and Propeller for an Electric Aircraft
IEEE Access, vol. 11, pp. 79144-79155, 2023, doi: 10.1109/ACCESS.2023.3299816

Borcherding, T.; Bode, C.; Rosenzweig, M.; Przytarski, P. J.; Leggett, J.; Sandberg, R. D.:
Entropy Loss Breakdown Comparison for LES and RANS of a Transonic Compressor Stage Midspan Section
Proceedings of the ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition. Volume 13A: Turbomachinery — Axial Flow Fan and Compressor Aerodynamics. Boston, Massachusetts, USA. June 26–30, 2023. V13AT29A032. ASME. https://doi.org/10.1115/GT2023-102949

Kessler, D. und Friedrichs, J.:
On the influence of non-uniform roughness distribution in a compressor stator row
Proceedings of the International Gas Turbine Congress. Kyoto, Japan: International Gas Turbine Congress 2023 - Konferenzbeitrag

Goeing, J.; Seehausen, H.; Stania, L.; Nuebel, N.; Salomon, J.; Ignatidis, P.; Dinkelacker, F.; Beer, M.;Denkena, B.; Seume, J. R.; Friedrichs, J.:
Virtual process for evaluating the influence of real combined module variations on the overall performance of an aircraft engine
Journal of the Global Power and Propulsion Society. 2023;7:95-112. doi:10.33737/jgpps/160055

Göing, J.; Lück, S.; Schulten, S.; Spuhler, T.; Budziszewski, N.; Städing, J.; Friedrichs, J.:
Experimental Studies on the Deterioration Characteristics and Transient Performance of the IAE V2500-A1 Research Turbofan Engine
10th International EVI-GTI Conference, 25-27 April 2023, Budapest, Hungary

Göing, J.; Hanisch, L.; Lück, S.; Henke, M.; Friedrichs, J.:
Simulation of the Impact of a Deteriorated High-Pressure Compressor on the Performance of a Turbofan Engine Using a Pseudo Bond Graph Modelling Approach
GPPS, 16.-18. September 2019, Peking – JPPS-BJ-2019-160

Göing, Jan
Modellierung des nicht-linearen aerothermodynamischen Systemverhaltens von Flugantrieben
Technische Uni Braunschweig NFL, Dissertation

Schuchard, L.; Bień, M.; Ziaja, K.; Blanken, N.; Göing, J.; Friedrichs, J.; di Mare, F.; Ponick, B.; Mailach, R.:
A Study on Quantities Driving Maintenance, Repair, and Overhaul for Hybrid-Electric Aeroengines
Proceedings of the ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition. Volume 1: Aircraft Engine. Boston, Massachusetts, USA. June 26–30, 2023. V001T01A009. ASME
https://doi.org/10.1115/GT2023-100915

Schuchard, L., Bień, M., Ziaja, K., Blanken, N., Göing, J., Friedrichs, J., di Mare, F., Ponick, B., and Mailach, R.:
A Study on Quantities Driving Maintenance, Repair, and Overhaul for Hybrid-Electric Aeroengines
ASME. J. Eng. Gas Turbines Power. February 2024; 146(2)021013 – November/2023
https://doi.org/10.1115/1.4063580

Bien, M.; Lehmann, P.; Friedrichs, J.:
Generation of Parametric Climb Trajectories considering Operational Inputs for Aircraft Engine Thrust Extraction
Journal of Open Aviation Science, 1(2). https://doi.org/10.59490/joas.2023.7216

Wilken, A.; Pick, M.; Sieb, P.; Bien, M.; Lobitz, L.; Rodeck, R.; Wicke, K.; Wende, G.; Friedrichs, J.; Heimbs, S.:
Hybrid Electric Propulsion Systems for Medium-Range Aircraft from a Maintenance Point of View
Deutscher Luft- und Raumfahrtkongress 2023, 19.-21.Sep. 2023, Stuttgart
doi: 10.25967/610084

Bień, M.; Göing, J., Lück, S.; Hanisch, L.; Schefer, H.; Friedrichs, J.; Henke, M.; Mallwitz, R.:
Parallel Hybrid-Electric Operation of a Turbofan Engine during Climb and the Influence on Stability and MRO
Proceedings of International Gas Turbine Congress 2023 Kyoto (IGTC), November 26 – December 01, 2023, Kyoto, Japan

Lobitz, L.; Traub, H.; Overbeck, M.; Bień, M.; Heimbs, S.; Hühne, C.; Friedrichs, J.; Horst, P.:
Aircraft Wing Design for Extended Hybrid Laminar Flow Control
Aerospace 2023, 10, 938. https://doi.org/10.3390/aerospace10110938

Schulten, B.; Göing, J.; Lück, S.; Harjes L.; Spuhler T.; Franzheld P.; Grubert J.; Schwarz H.; Friedrichs J.:
Evaluation of the IFAS Research Turbofan Engine for Three Projects across MRO and Engine Performance
Poster presented at the ASME Turbo Expo 2023; GT2023-109897; June 26-30, 2023

Seume, E.; Goeing, J.; Friedrichs, J.:
Fusing Mode S and Earth observation data for ML-driven engine performance deterioration modeling
Journal of Open Aviation Science, 1(2). https://doi.org/10.59490/joas.2023.7214

Sukhman, D.; Lück, S.; Göing, J.; Bartl, J.; Hansen, T.; Stenfelt, G.; Friedrichs, J.:
Layout and Yaw Optimisation of an Offshore Wind Farm Through Analytical Modelling
J. Phys.: Conf. Ser. 2023, 2626 (1), 012058
doi.org10.1088/1742-6596/2626/1/012058

Nicolay, S.; Fritsche, L.; Lück, S.; Friedrichs, J.; Doering, R.:
Development and Evaluation of Strategies for Parallel Operation of Fuel Cell Stacks
Deutscher Luft- und Raumfahrtkongress 2022, Dresden; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V.: Bonn, 2023; p 570412. doi.org10.25967/570412

Lück, S., Goeing,J., Wittmann, T., Mimic, D., Friedrichs, J.:
Fuel Cell-Based Propulsion Architectures for Short Range Aircraft
Präsentation IGTC 2023, Kyoto, Japan

Grubert, J.; Göing, J.; Friedrichs, J.:
Assessment of a body force modeling approach to examine the aerodynamics of high bypass ratio fan stages
GPPS, 17. – 19. Oktober 2023, Hong Kong. TC-2023-0010

Grubert, J.; Brunow, P.; Frantzheld, P.; Friedrichs, J.:
Commissioning of an intake fan test rig for coupled aerodynamic investigation of UHBR fans and intakes
Präsentation IGTC 2023, Kyoto, Japan

Hinz,L., Göing, J., Friedrichs, J.
A review of compressor design for future aircraft propulsionarchitecturesPräsentation
IGTC 2023, Kyoto, Japan

Wittenberg, A.; Rühle, T.; Greving, J.; Wichern, F.; Friedrichs, J.:
Premilinary Wear Investigations With Pressure Actuated Leaf Seals for Superheated Steam Turbine Application
ASME J. Eng. Gas Turbines Power. Mar 2024, Vol.146, Issue 3 (10 pages) – (Nov.2023)
https://doi.org/10.1115/1.4063587

Wittenberg, A.; Rühle, T.; Greving, J.; Wichern, F.; Friedrichs, J.:
Premilinary Wear Investigations With Pressure Actuated Leaf Seals for Superheated Steam Turbine Application
Proceedings of the ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition. Massachusetts, USA. June 26–30, 2023 – GT2023-103823

2022

Lück, S.; Wittmann, T.; Göing, J.; Bode, C.; Friedrichs, J.
Impact of Condensation on the System Performance of a Fuel Cell Turbocharger
Machines 2022, 10, 59. https://doi.org/10.3390/machines10010059

Lück, S.; Göing, J.; Wittmann, T.; Kirsch, B.; Benjamin, L.; Friedrichs, J.;
Propeller Design and Performance Evaluation with Partially Prescribed Velocity Distribution
GPPS Xi’an, 4/22 – GPPS-TC-2021-328

Kösters, T.L.; Liu, X.; Kožulović, D.; Wang, S.; Friedrich, J.; Gao, S.
Comparison of phase-change-heat-pump cooling and liquid cooling for PEM fuel cells for MW-level aviation propulsion
International Journel of Hydrogen Energy, 06.2022;
www.elsevier.com/locate/he

Kessler, D.; Friedrichs, J.; Lörcher, F.
Influence of Winglets on the Tip Vortex of Low Pressure Axial Fans
International Conference on Fan Noise, Aerodynamics, Applications and Systems, Senlis, Frankreich, 27.06.-29.06.2022,
DOI: 10.26083/tuprints-00021733

Kessler, D.; Friedrichs, J.; Werner-Spatz, C.
On the impact of Fouling on the Stage Interaction in a 2.5-stage Compressor
GPPS/Society; ISSN-Nr: 2504-4400; GPPS Chania 22; 12.-14. September 2022
GPPS-TC-2022-0034

Kessler, D.; Friedrichs, J.; Becker, B.; Grothe, P.
Experimental Investigation of Bleed Air Extraction for different Stator and Stage Setups
Proceedings of ISABE,2022, Ottawa, Kanada, ISABE 2022-209

C. Bode and P. J. Przytarski and J. Leggett and R. D. Sandberg
“Highly Resolved Large-Eddy Simulations of a transonic compressor stage midspan section - Part I: Effect of inflow disturbances”
In: ASME Turbo Expo 2022, GT2022–81673. 2022.

P. J. Przytarski and C. Bode and J. Leggett and R. D. Sandberg
“Highly Resolved Large-Eddy Simulations of a transonic compressor stage midspan section - Part II: Effect of rotor-stator gap”
In: ASME Turbo Expo 2022, GT2022–82474. 2022

D. Kozulovic and N. Juchmann and A. Führing and C. Bode 
“Transition Model Extension for Roughness Effects ”
In: ASME Turbo Expo 2022, GT2022–83277. 2022

P. J. Przytarski and C. Bode and J. Leggett and R. D. Sandberg
 “High-Fidelity Simulations of the Flow Unsteadiness in the Rotor of a Transonic Compressor Stage”
In: International Symposium on Unsteady Aerodynamics Aeroacoustics and Aeroelasticity of Turbomachines, ISUAAAT16-33. 2022

A. Führing, N. Juchmann, C. Bode, S. Behre, P. Jeschke:
Enhanced Modeling of Turbulent Decay in Steady State Mixing Plane Simulations
ISABE 2021 - 25rd International Society of Air-breathing Engines Conference, Ottawa, Canada, Sep 25-30, 2022, ISABE-2021-116

Wittmann, T.; Lück, S.; Bode, C.; Friedrichs, J.
Investigation of Water Droplet Erosion in the Radial Turbine of a Fuel Cell Turbocharger
GPPS Xi’an, 4/22 – GPPS-TC-2021-72
doi:10.33737/gpps21-tc-72

Wittmann, T.; Lück, S.; Hertwig, T.; Friedrichs, J.
On the Importance of Condensation for the Thermodynamic Cycle of Fuel Cell Turbochargers in Aviation
Proceedings of the ISABE 2022 Conference. International Society of Air Breathing Engines, 2022

Wittmann, T.; Wiśniewski, P.; Lück, S.; Dykas, S.; Friedrichs, J.
Analysis of the Condensation Phenomena within the Radial Turbine of a Fuel Cell Turbocharger
Proceedings of the ASME Turbo Expo 2022. American Society of Mechanical Engineers, 2022

Wittmann, T.; Lück, S.; Bode, C.; Friedrichs, J.
Kondensation und Flüssigwasser in der Radialturbine eines Brennstoffzellenturboladers
26. Aufladetechnische Konferenz, 2022

Wittmann, T.; Hertwig, T.; Lück, S.; Zenyuk, I.; Friedrichs, J.
Die Luftversorgung von PEM-Brennstoffzellen in großen Flughöhen DLRK2022-Dresden, 9/22-Konferenzbeitrag

Wiśniewski, P.; Dykas, S.; Majkut, M.; Smołka, K.; Nocoń, M.; Wittmann, T.;Friedrichs, J.
A comprehensive analysis of the moist air transonic flow in a nozzle with a very low expansion rate
Applied Thermal Engineering, Volume 217,2022.2022.119185
doi:10.1016/j.applthermaleng

Wittenberg, A.; Schwarz, H.; Friedrichs, J.
Preliminary Investigations with Pressure Actuated Leaf Seals for Superheated Steam Turbine Application
ISUAAAT16-22, Toledo/Spain

C. Zumegen, P. Strathoff, E. Stumpf, M. Schollenberger, T. Lutz, E. Krämer, B. Kirsch, J. Friedrichs, M. Schubert, K.U. Schroeder
"Aerodynamic and structural analysis of a partial turboelectric commuter aircraft with wing tip propellers at aircraft level"
Konferenzbeitrag auf der AIAA 2022, -wird derzeit noch in einen Journal Artikel umgeschrieben

B. Kirsch, M. Diedrich, S. Lück, J. Göing, T. Wittmann, J. Friedrichs
"AERODYNAMIC ANALYSIS OF GEOMETRY TRANSFER AND TURBULENCE MODEL VARIATION FOR PROPELLER BLADES"
DLRK2022-Dresden, 9/22-Konferenzbeitrag

M. Schollenberger, B. Kirsch, T. Lutz, E. Krämer, J. Friedrichs
"AERODYNAMIC INTERACTIONS BETWEEN DISTRIBUTED PROPELLERS AND WINGS AT ELECTRIC COMMUTER AIRCRAFT IN CRUISE CONDITION"
DLRK2022-Dresden, 9/22-Konferenzbeitrag

Brunow, P.; Grubert, J.; Friedrichs, J.; Ortmanns, J.
Design and development of a variable area nozzle as throttle for a test rig for fan-intake interaction
ISABE-Conference, Ottawa/ Canada 9/2022-144

Grubert, J.; Brunow, P.; Friedrichs, J.; Meillard, L.; Schnell, R.; Winkelmann, P.; Ortmanns, J.
Design and development of a combined intake fan test rig to enable investigations of stable operating ranges
ISABE-Conference, Ottawa/ Canada 9/2022-207

Lück, S.; Schödel, M.; Menze, M.; Göing, J.; Seume, R; Friedrichs, J.
Impact of Compressor and Turbine Operating Range Extension on the Performance of an Electric Turbocharger for Fuel Cell Applications
Proceedings of the ASME Turbo Expo 2022. American Society of Mechanical Engineers, 2022 – GT2022-82974

Lück, S.; Wittmann, T.; Göing, J.; Bode, C.; Friedrichs, J.
Systemsimulation eines elektrischen Turboladers für Brennstoffzellenanwendungen unter Berücksichtigung von Kondensationsphänomenen in der Radialturbine
FC³ Fuel Cell Conference. Chemnitz, 31.05./01.06.2022,
https://nbn-resolving.org/urn:nbn:de:bsz:ch1-qucosa2-764130

Wittmann, T.; Lück, S.; Bode, C.; Friedrichs, J.
On the Impact of Condensation and Liquid Water on the Radial Turbine of a Fuel Cell Turbocharger
Machines 2022, 10, 1053. https:/ / doi.org/machines10111053

Wittmann, T.; Lück, S.; Hertwig, T.; Friedrichs, J.
On the importance of condensation for the Thermodynamic cycle of fuel cell turbochargers in aviation
ISABE-Conference, Ottawa/ Canada 9/2022-167

Wittmann, T.; Hertwig, T.; Lück, S.; Zenyuk, I.; Friedrichs, J.
Die Luftversorgung von PEM-Brennstoffzellen in Frossen Flughöhen
DLRK2022-Dresden, 9/22-Konferenzbeitrag

Göing, J.; Hinz, L.; Lück, S.; Bien, M.; Friedrichs, J.;
Interaction of combined module variances and influence on the overall performance of a turbofan engine
ISABE-Conference, Ottawa/ Canada 9/2022-167

Jan Goeing, Hendrik Seehausen, Lennart Stania, Nicolas Nuebel, Julian Salomon, Panagiotis Ignatidis, Friedrich Dinkelacker, Michael Beer, Berend Denkena, Joerg R. Seume, Jens Friedrichs
Virtual Process for Evaluating the Influence of Real Combined Module Variations on the Overall Performance of an Aircraft Engine
GPPS Chania, 9/22 – GPPS-TC-2022-0089
DOI: 10.33737/gpps22-tc-89

Felix Greco, G.; Yildiz, B.; Göing, J.; Ring, T.P.; Feuerle, T.; Hecker, P.; Langer, S.C.
Environmental Noise Assessment of Holding Approach Procedures Using a Multi-Level Simulation Framework.
Aerospace 2022, 9, 544. https://doi.org/10.3390/aerospace9100544

Wahler, N. F.; Radomsky, L.; Hanisch, L. V.; Göing, J.; Meyer, P.; Mallwitz, R.; Friedrichs, J.; Henke, M.; Elham, A.
An Integrated Framework for Energy Network Modeling in Hybrid-Electric Aircraft Conceptual Design
AIAA2022, Chicago/USA
https://doi.org/10.2514/6.2022-3741

Panagiotis Ignatidis, Viet D. Nghiem, Jan Goeing, Marcel Oettinger, Henrik von der Haar, Jens Friedrichs, Joerg R. Seume, Friedrich Dinkelacker
MIXING BEHAVIOUR AND PROPAGATION OF COMBUSTION CHAMBER DEFECTS IN AN AIRCRAFT ENGINE
GPPS Chania, 9/22 DOI: 10.33737/gpps22-tc-103

Spuhler, T.; Friedrichs, J.; Städing, J.; Reitz, G.; Marx, M.
CFD Modelling of a Complete Enclosed Jet Engine Test Bed and Validation with Pass-Off Data
GPPS Chania, 9/22 – GPPS-TC-2022-0027

Harjes; L.; Benjamin, L.; Grubert, J.; Heykena, C.; Friedrichs, J.
Development of Aspirated Ultra-Short Intakes for Aerodynamic Off-Design Analysis
GPPS Xi’an, 4/22 – GPPS-TC-2021-0023

Seidler, M.; Friedrichs, J.
Introduction Of An Improved Axial Compressor Profile Shape Modelling Approach For Increased Flexibility In Transonic Profile Design
GPPS Xi’an, 4/22 – GPPS-TC-2021-0023

Seidler, M.; Montano, Z.; Friedrichs, J.; Riemenschneider, J.
Introduction and Evaluation of an Aerostructural Coupling Approach for the Design of Shape Adaptive Compressor Blading
25th International Symposium on Airbreathing Engines. Ottawa. 2022.

Montano, Z.; Seidler, M.; Riemenschneider, J.; Friedrichs, J.
A Coupling Method for the Design of Shape-Adaptive Compressor Blades
MDPI-Applied Mechanics2022/ 3 (1), S. 182–209.
DOI: 10.3390/applmech3010014

Seidler, M.; Montano, Z.; Mimic, D.; Meinicke, N. M.; Friedrichs, J.; Riemenschneider, J.; Seume, J. R.
Combining Shape-Adaptive Blades and Active Flow Control in a Multi-Stage Axial Compressor – A Numerical Study
DLRK2022-Dresden, 9/22-Konferenzbeitrag

Bien, M.; Ziaja, K.; Blanken, N.; Cao, Y.; Schuchard, L.; Göing, J.; Friedrichs, J.; di Mare, F.; Mertens, A.; Ponick, B.; Voigt, M.; Mailach, R.
Modelling Degradation Mechanisms in Hybrid-Electric Aircraft Propulsion Systems
25th International Symposium on Airbreathing Engines. Ottawa. 2022.

Eggers, T., Friedrichs, Gößling, J., Seume, J. R., Flüh, J. , Paletta, N., J., and Lindemann, J., 2022.
“Effect of 3D blade design on the aerodynamic, aeroelastic and structural behavior of a scaled UHBR fan”
12th EASN International Conference on Innovation in Aviation & Space for opening New Horizons, Barcelona

Gößling, J., Seume, J. R., Flüh, J. P., Paletta, N., Eggers, T., Friedrichs, J., and Natale, N., 2022.
“Aerodynamic damping of composite uhbr fans under the consideration of acoustic intake reflection”
In Volume 8A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction, American Society of Mechanical Engineers.

2021

Wittmann, T.; Lück, S.; Bode, C.; Friedrichs, J.:
Modelling the Condensation Phenomena within the Radial Turbine of a Fuel Cell Turbocharger.
Int. J. Turbomach. Propuls. Power 2021, 6, 23. https://doi.org/10.3390/ijtpp6030023 

Wittmann, T.; Bode, C.; Friedrichs, J.:
The Feasibility of an Euler-Lagrange Approach for the Modeling of Wet Steam
Journal of Engineering for Gas Turbines and Power /ASME; Vol 143, April 2021

Rolinck, M.; Gellrich, S.; Bode, C.; Mennenga, M.; Cerdas, F.; Friedrichs, J.; Herrmann, C:
A Concept for Blockchain-Based LCA and its Application in the Context of Aircraft MRO
Procedia CIRP, Volume 98, 2021, Pages 394-399,ISSN 2212-8271, https://doi.org/10.1016/j.procir.2021.01.123 

Wittmann, T.; Lück, S.; Bode, C; Friedrichs, J.:
Euler-Lagrange Simulation of Homogeneous Condensation in a Radial Turbine
WCCM –ECCOMAS 2020; January 11-15, 2021; Online-Videokonferenz; Konferenzbeitrag

Goeing, J.; Hogrefe, J.; Lueck, S.; Friedrichs, J.:
Validation of a Dynamic Simulation Approach for Transient Performance Using the Example of a Turbojet Engine
STAB/DGLR Symposium 2020: New Results in Numerical and Experimental Fluid Mechanics XIII, Springer International Publishing, p. 559-568, 2021

Bode, C.; Friedrichs, J.:
AG Turbo ECOFLEX-Turbo:
4.2.8B Physikalisch-basierte Selektion viskoser Strömungsbereiche
AG Turbo Abschlussbericht; 05.2021; Laufzeit01/2016-12/2020
Forschungsvorhaben 03Ett091X

Voigt, J.; Jurke, K.; Schultz, J.; Römer, U.; Friedrichs, J.:
Quantifying Model Uncertainties and Sensitivities in Parallel Compressor Models
Proceedings of the ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition. Virtual, Online. June 7–11, 2021; ASME GT2021-59373; https://doi.org/10.1115/GT2021-59373 

Voigt, J.; Friedrichs, J.:
Development of a Multi-Segment Parallel Compressor Model for a Boundary Layer Ingesting Fuselage Fan Stage
Energies 2021, 14, 5746. https://doi.org/10.3390/en14185746 ; Journalpaper

Jonas Voigt, Julius Schultz, Stephan Benz, Ulrich Römer, Jens Friedrichs
Evaluation of multi-Segment Parallel Compressor Models with Inflow Uncertainty
Deutscher Luft- und Raumfahrtkongress (DLRK) 2021 31.08.-02.09.2021, Bremen & online.

Seidler, M; Sivamoorthy, K.; Friedrichs, J.:
Introduction of a Streamline Curvature Design Methodology for the Vortex Design of Shape Adaptive Compressor Blading.
Proceedings of the 14th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, 2021 (in press).

Seidler, M. ; Friedrichs J.:
Introduction of an Improved Axial Compressor Profile Shape Modelling Approach for Increased Flexibility in Transonic Profile Design
Proceedings of Global Power and Propulsion Society, 2021 (in press)

Montano Rejas, Z. ; Seidler, M. ; Riemenschneider, J. ; Friedrichs, J.:
Aerodynamic Validation for Compressor Blades Structural Morphing Concepts
DLRK 2021, 31. Aug. - 02. Sep. 2021, Bremen, Germany

Meyer, P.; Ehlert, J.; Lück, S.; Göing, J.; Friedrichs, J:
Design of Propellers for Electric Propulsion Systems
Poster presented at the ASME Turbo Expo 2021; GT2021-1305; Virtual, Online; June 7–11, 2021

Hertwig, T; Wittmann; T, Bode, C.; Friedrichs, J.:
Simulation of the Condensation Phenomena in the Turbine of a Fuel Cell Turbocharger
Poster presented at the ASME Turbo Expo 2021; GT2021-66893; Virtual, Online; June 7–11, 2021  (Awarded the 1st place in the poster competition)

Rau, C; Wittmann, T.; Bode, C.; Friedrichs, J.:
Simulation of the Particle Transport in the Fan Stage of a Jet Engine
Poster presented at the ASME Turbo Expo 2021; GT2021-66778. Virtual, Online. June 7–11, 2021 (Awarded the 2nd place in the poster competition)

Meyer, P.; Lück, S.; Spuhler, T.; Bode, C.; Hühne, C.; Friedrichs, J.; Sinapius, M.:
Transient Dynamic System Behavior of Pressure Actuated Cellular Structures in a Morphing Wing.
Aerospace 2021, 8, 89. https://doi.org/10.3390/aerospace8030089 

Salomon, J, Göing, J, Lück, S, Broggi, M, Friedrichs, J, & Beer, M.:
Sensitivity Analysis of an Aircraft Engine Model Under Consideration of Dependent Variables
Proceedings of the ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition. Volume 1: Aircraft Engine; Fans and Blowers; Marine; Wind Energy; Scholar Lecture. Virtual, Online. June 7–11, 2021. V001T01A005. ASME. https://doi.org/10.1115/GT2021-58905  

Führing, A. ; Kožulović, D. ; Bode, C. ; Franke, M.:
Modeling of Wake Effects in Steady State Mixing Plane Simulations of a High Lift Turbine Cascade with Different Combinations of Wake Passing Frequency and Wake Orientation
Journal of Physics: Conference Series, Volume 1909, Issue 1, article id. 012001 (2021).

Führing, A.; Kožulovic, D.; Bode, C.; Franke, M.:
Steady and Unsteady RANS Modeling of Wake Effects and Grid Resolution Requirements in a Low-Pressure Turbine Cascade
IOP Conference Series: Materials Science and Engineering, Volume 1024, Issue 1, pp. 012043 (2021)

Eggers, T, Friedrichs, J, Goessling, J, Seume, JR, Natale, N, Flüh, JP, & Paletta, N.:
Composite UHBR Fan for Forced Response and Flutter Investigations  
Proceedings of the ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition. Volume 2A: Turbomachinery — Axial Flow Fan and Compressor Aerodynamics. Virtual, Online. June 7–11, 2021. V02AT31A021. ASME. https://doi.org/10.1115/GT2021-58941 

Natale, N.; Eggers, T.; Friedrichs, J.; Russo, S.:
Aerodynamic Analysis of a scaled UHBR Fan
11th EASN Virtual International Conference on Innovation in Aviation & Space to the Satisfaction of the European Citizens

Paletta N.; Flüh J.; Lindemann J.; Seume J.; Goessling J.; Friedrichs J.; Eggers T.; Russo S.; Natale N.; Vlachos D.; Mazarakos D.; Baltopoulos A.; Vavouliotis A.:
The preliminary design of a scaled Composite UHBR Fan for a wind tunnel test campaign 
11th EASN Virtual International Conference on Innovation in Aviation & Space to the Satisfaction of the European Citizens

Tolksdorf, V.; Gokhale, A.; Kessler, D.; Benjamin, L.; Bode, C.; Friedrichs, J.:
Influence of Roughness on the Transition Modeling in Compressor Flows
Proceedings of the ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition. Virtual, Online. June 7–11, 2021; ASME GT2021-60003

Wittmann, T.; Lück, S.; Hertwig, T.; Bode, C.; Friedrichs, J.:
The Influence of Condensation on the Performance Map of a Fuel Cell Turbocharger Turbine
Proceedings of the ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition; Virtual, Online. June 7–11, 2021. V02AT31A021. ASME; doi.org/10.1115/GT2021-58472 

Wittmann, T.; Lück, S.; Bode, C.; Friedrichs, J.:
Modelling the Condensation Phenomena within the Radial Turbine of a Fuel Cell Turbocharger
Proceedings of the 14th European Conference on Turbomachinery Fluid dynamics & Thermodynamics. Gdansk, Poland. April 12-16, 2021

Hertwig, T.; Wittmann, T.; Wisniewski, P.; Bode, C.; Friedrichs, J.:
Modeling Condensing Flows of Humid Air in Transonic Nozzles
18th Multiphase Flow Conference and Short Course; 8 - 12 November 2021; Online-Videokonferenz; Konferenzbeitrag

2020

Goeing, J.; Seehausen, H.; Vladislav, P.; Lueck, S.; Seume, J. R.; Friedrichs, J.:
Influence of combined compressor and turbine deterioration on the overall performance of a jet engine using RANS simulation and Pseudo Bond Graph approach
GPPS/Journal; 22 December 2020; Journal of the Global Power and Propulsion Society¸https://doi.org/10.33737/jgpps/131109

Heykena, C.; Obayashi, N.; Friedrichs, J.:
Intake Design and Airframe Integration Sensitivities for an Embedded Over-The-Wing Mounted Ultra-High Bypass Ratio Turbofan
In: Radespiel, R.; Semaan, R (eds) Fundamentals of High Lift for Future Civil Aircraft
Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 145. Springer, Cham. https://doi.org/10.1007/978-3-030-52429-6_21, online 18.10.2020 

Lück, S.; Göing, J.; Bode, C.; Friedrichs, J.:
Pseudo Bond Graph System Modelling of Electric Air Compressors With Energy Recovery For Fuel Cell Applications
Proc. ASME Turbo Expo, Paper No. 2020-15029, 22.-26.Juni 2020, London, England

Montano Rejas, Z. M.; Seidler, M.; Riemenschneider, J.; Friedrichs, J.:
An Introduction to a Coupled Structural and Aerodynamic Design Method for Shape-Adaptive Compressor Blades
DLRK2020; 01.-03. September 2020; Online-Videokonferenz; Konferenzbeitrag

Giesecke, D.; Friedrichs, J.:
Aerodynamics and Loss Accounting of a Low Pressure Ratio Fan for an Over-Wing Mounted Engine
Fundamentals of High Lift for Future Civil Aircraft pp 299-314; Springer Verlag; online 18.10.2020

Harjes, L.; Bode, C.; Grubert, J.; Frantzheld, P.; Koch, P.; Friedrichs, J.:
Investigation of jet engine intake distortions caused by crosswind conditions
GPPS/Journal; 14.Mai 2020; Journal of the Global Power and Propulsion Society

Wittmann, T.; Lueck, S.; Bode, C.; Friedrichs, J.:
Euler-Lagrange Simulation der homogenen Kondensation in einer Radialturbine
FEM-Kolloquium; 12.Februar 2020; Stuttgart; Konferenzbeitrag

Wittmann, T.; Bode, C.; Friedrichs, J.:
The Feasibility of an Euler-Lagrange Approach for the Modelling of Wet Steam
Proc. ASME Turbo Expo, Paper No. 2020-16199, 22.-26.Juni 2020, London, England

Göing, J.; Bode, C.; Friedrichs, J.; Seehausen, H.; Herbst, F.; Seume, J.R
Performance Simulation of Roughness Induced Module Variations of a Jet Propulsion by Using Pseudo Bond Graph Theory
Proc. ASME Turbo Expo, Paper No. 2020-14456, 22.-26.Juni 2020, London, England

Voigt, J.; Friedrichs, J.:
Development of a Multi-Segment Parallel Compressor Model for a Boundary Layer Ingesting Fan Stage
DLRK2020; 01.-03. September 2020; Online-Videokonferenz; Konferenzbeitrag

Eggers, T.; Kim, H.R.; Bittner, S.; Friedrichs ,J.; Seume, J.R.:
Aerodynamic and Aeroelastic Effects of Design-Based Geometry Variations on a Low-Pressure Compressor
International Journal of Turbomachinery Propulsion and Power,Volume 5 (2020)

Führing,A.;Kožulović,D.;Bode,C.;Franke,M.:
STEADY STATE MODELING OF UNSTEADY WAKE INDUCED TRANSITION EFFECTS IN A MULTISTAGE LOW PRESSURE TURBINE 
Proc. ASME Turbo Expo, Paper No. 2020-14558, London, England, 2020

Führing,A.,Kožulović,D.;Bode,C.;Franke,M.:
Modeling of Wake Effects in Steady State Mixing Plane Simulations of a High Lift Turbine Cascade with Different Combinations of Wake Passing Frequency and Wake Orientation
International Symposium on Transport Phenomena and Dynamics of Rotating Machinery 2020 Honolulu, Hawaii, USA, 2020

Führing,A.,Kožulović,D.;Bode,C.;Franke,M.:
Steady and Unsteady RANS Modeling of Wake Effects and Grid Resolution Requirements in a Low-Pressure Turbine Cascade
10th EASN Virtual International Conference on  Innovation in Aviation & Space to the Satisfaction of the European Citizens, 2.-4. September 2020

Achmus, M.; Friedrichs, J.; Becker, B.:
Experimental Investigation of Bleed Air Extraction Through a Circumferential Gap in a Low Speed Axial Compressor Stage
GPPS/Proceedings, 07-09.09.2020, Chania/Griechenland

Goeing, J.; Seehausen, H; Lueck, S.; Friedrichs, J.; Pak, V.; Seume, J. R.
Influence of Combined Compressor and Turbine Deterioration on the Overall Performanceof a Jet Engine using Rans Simulation and Pseudo Bond Graph Approach
GPPS/Proceedings, 07-09.09.2020, Chania/Griechenland

Benjamin, L.; Heykena, C.; Friedrichs, J.; Márquez, C.
Design and Optimization of a Nacelle for a UHBR Turbofan engine using an Intuitive Class Shape Transformation based parameterization
GPPS/Proceedings, 07-09.09.2020, Chania/Griechenland

Reggentin, P.
Investigation of Brush Seal Instabilities
IAA Propulsion and Energy Forum, 20.-28. August 2020

Reggentin,P; Friedrichs, J:
Optimierte Bürstendichtungen für einen flexiblen Kraftwerks-betrieb
AG Turbo COOREFLEX-Turbo; Teilverbundprojekt Expansion; Entwicklung anderer Expansionskomponenten; Vorhaben 4.3.2;
Fachlicher Abschlussbericht-Forschungsvorhaben 03ET7071A

Reggentin, P.; Friedrichs, J.; Flegler, J.; McBean,I.:
Investigation of a Novel Pressure-Actuated Brush Seal under Hot Steam Conditions
GPPS/Journal; 01.April 2020; Journal of the Global Power and Propulsion Society

2019

Giesecke, D., Friedrichs, J.:
Stator design study for an ultra-high bypass ratio fan stage with boundary layer ingestion
68. Deutscher Luft- und Raumfahrtkongress (DLRK) 2019 in Darmstadt, Sep 30 - Oct 02, 2019, DLRK2019_490136; Konferenzbeitrag

Eggers, T.; Friedrichs J.; Kim, H. R.; Seume, J.:
Aeroelastic Effects of Aerodynamic Based Geometry Variation on a Low Pressure Compressor
DLRK 2019, Darmstadt 01.10.2019
No. DLRK 2019_490140 - Konferenzbeitrag

Schrapp, H.; Dodegge, A.; Gümmer, V.; Harvey, N.W.; Friedrichs, J.; Städing, J.:
Reducing Compressor Shroud Leakage Flows By Raising The Stator Hub Line –Low Speed Tests
ASME Turbo Expo 2019 in Phoenix, Arizona, USA, June 17-21, 2019, Paper No. GT2019-91605

Gilge, P.; Kellersmann, A.; Friedrichs, J.; Seume, J.:
Surface roughness of real operationally used compressor blade and blisk
Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering
https://doi.org/10.1177/0954410019843438; 09.05.2019

Bauer, M.; Friedrichs, J.; Werner-Spatz; C.:
Erprobung einer direkten Schubmessung im Flugbetrieb
Ingenieurspiegel 1/2019

Messenger, A.; Williams, R.; Ingram, G.; Hogg, S.; Reggentin, P.:
Demonstration of a Dynamic Clearance Seal in a Rotating Steam Test Facility
ASME Turbo Expo 2019 in Phoenix, Arizona, USA, June 17-21, 2019, Paper No. GT2019-91605

Giesecke, D., Friedrichs, J.:
Stator design study for an ultra-high bypass ratio fan stage with boundary layer ingestion
Deutscher Luft- und Raumfahrtkongress (DLRK) 2019 in Darmstadt, Sep 30 - Oct 02, 2019, DLRK2019_490136

Spuhler, T.; Kellersmann, A.; Bode, C.; Friedrichs, J.; Reitz, G.; Kotulla, M.; Kappei, F.; Michaelis, T.:
The V2500-A1 as a Test Rig towards Digital Twin Modeling
IGTC 2019 Tokyo – IGTC-2019-024

Eggers, T.; Friedrichs J.; Kim, H. R.; Seume, J.:
Aeroelastic Effects of Aerodynamic Based Geometry Variation on a Low Pressure Compressor
DLRK 2019, Darmstadt 01.10.2019 No. DLRK 2019_490140

Frantzheld, P.; Kessler, D.; Skorpel, A.:
Optimale Niederdruck Axialventilatoren – Aerodynamisches und aeroakustisches Potenzial von Schaufel- und Blattspitzendesign bei Niederdruck-Axialventilatoren
FLT-Abschlussbericht; Heft L248-2019

Achmus, M.; Aufderheide, T.; Friedrichs, J.:
Strömungsbeeinflussung durch aktive Seitenwandmodifikation
Fachlicher Abschlussbericht Forschungsvorhaben 03ET7071N; AG Turbo COOREFLEX-Turbo; Teilverbundprojekt Verdichtung-Vorhaben 1.1.2b

Achmus, M.; Friedrichs, J.; Becker, B.:
Experimental Investigation of the Flow Characteristics in a Circumferential Bleed Port Geometry and the Interaction with a 1.5-stage Axial Compressor
IGTC 2019 Tokyo – IGTC-2019-149

Wittmann, T.; Lück, S.; Bode, Ch.; Friedrichs, J.:
Numerical Simulation of Nucleation and Condensation in Nozzles and Radial
37. CADFEM ANSYS Simulation Conference 2019/Kassel

Giesecke, D.; Wehking, M.; Friedrichs, J.; Siegert, M.; Binner, M.:
Forecasting the condition of high-Pressure turbine parts by using Bayesian Belief Networks
11. Dresdner Probabilistik-Workshop; October 2019

Lück, S.; Wittmann, T.; Bode, C.; Friedrichs, J.:
Analysis of the impact of moist air in the gas path o fair supply systems with energy recovery for fuel cell powered aircraft
DLRK 2019, Darmstadt Oktober 2019

Göing, J.; Lück, S.; Bode, Ch.; Friedrichs, J.:
Simulation of the Impact of a Deteriorated High-Pressure Compressor on the Performance of a Turbofan Engine Using a Pseudo Bond Graph Modelling Approach
GPPS, 16.-18. September 2019, Peking – JPPS-BJ-2019-160

Harjes, L.; Bode, Ch.; Grubert, J.; Frantzheld, P.; Koch, P.; Friedrichs, J.:
Investigation of Jet Engine Intake Distortions Caused by Crosswind Conditions
GPPS, 16.-18. September 2019, Peking – JPPS-BJ-2019-178

Eggers, T.; Friedrichs, J.:
Effects of Increasing Bypass Ratio of UHBR Fans on Near Hub Flow
GPPS, 16.-18. September 2019, Peking – JPPS-BJ-2019-0186

Reggentin, P.; Friedrichs, J.; Flegler, J.; McBean,I.:
Investigation of a Novel Pressure-Actuated Brush Seal under Hot Steam Conditions
GPPS, 16.-18. September 2019, Peking – JPPS-BJ-2019-0119

Schur, F.; Friedrichs, J.:
Operational Performance and Locally Resolved Outflow of Brush Seals
Best Paper Award
AJK-FLUIDS-2019-4877, San Francisco, CA, USA

Göing, J,; Kellersmann, A.; Bode, Ch.; Friedrichs, J.:
System Dynamics of a Single-Shaft Turbojet Engine Using Pseudo Bond Graph
Contributions to the 21st STAB/DGLR Symposium, Darmstadt, Germany, 2018

Kessler, D.; Giesecke, D.; Friedrichs, J.; Leuschner, J.:
Aerodynamic Design and Assessment of a Compact, Single Stage Axial Fan with Low Noise Eminssion
AJK-Fluids-2019, San Francisco, CA, USA

Schur, F.; Friedrichs, J.:                                
Operational Performance and Locally Resolved Outflow of Brush Seals
AJK-Fluids-2019-4877, San Francisco, CA, USA

Giesecke, D.; Friedrichs, J.:
Aerodynamic Comparison between Circumferential and Wing-Embedded Inlet Distortion for an Ultra-High Bypass Ratio Fan Stage
ASME Turbo Expo 2019 in Phoenix, Arizona, USA, June 17-21, 2019, Paper No. GT2019-90425

Göing, J.; Kellersmann, A.; Bode, C.; Friedrichs, J.:
Jet Propulsion Engine Modelling Using Pseudo Bond Graph Approach
ASME Turbo Expo 2019 in Phoenix, Arizona, USA, June 17-21, 2019, Paper No. GT2019-90420

Lück, S.; Kuntzagk, S.; Doebbener, G.; Kellersmann, A.; Bode, C.; Friedrichs, J.:
Accuracy Assessment of Steady and Unsteady Multistage High Pressure Compressor Simulations
ASME Turbo Expo 2019 in Phoenix, Arizona, USA, June 17-21, 2019, Paper No. GT2019-91310

Krone, J.-H.; Harjes, L.; Frantzheld, P. Koch, P.; Giesecke, D.; Friedrichs, J.:
Atmospheric Crosswind Tests of Aspirated Jet Engine Intake Models
Proceedings of Zürich 2019; Global Power and Propulsion Forum; 15.-16. Januar 2019

2018

Goldmann, A; Sauter, W.; Oettinger, M.; Kluge, T.; Schröder, U.; Seume, J. R.; Friedrichs, J.; Dinkelacker, F.:
A Study on Electrofuels in Aviation
Energies 2018, 11, 392; doi:10.3390 / en11020392

Hoelzen, J.; Liu, Y.; Bensmann, B.; Winnefeld, C.; Elham, A.; Friedrichs, J.; Hanke-Rauschenbach, R.:
Conceptual Design of Operation Strategies for Hybrid Electric Aircraft
Energies 2018, 11, 217; doi:10.3390 / en11010217

Göing, J.; Bartl, J.; Mühle, F.; Sætran, L.; Thamsen, P.U.:
A Detached-Eddy-Simulation study: Proper-Orthogonal-Decomposition of the wake flow behind a model wind turbine.
Journal of Physics: Conference Series (Vol. 1104, No. 1, p. 012005). IOP Publishing

Giesecke, D.; Lehmler, M.; Friedrichs, J.; Blinstrub, J.; Bertsch, L.; Heinze, W.
Evaluation of ultra-high bypass ratio engines for an over-wing aircraft configuration
Journal of the Global Power and Propulsion Society, 2: 493-515, 2018

Kellersmann, A.; Reitz, G.; Friedrichs, J.
Deterioration Effects of Coupled Blisk Blades
Journal of the Global Power and Propulsion Society, 2: 465-476, 2018

Bode, C.; Friedrichs, J.; Frieling, D.; Herbst, F.:
Improved Turbulence Prediction in Turbomachinery Flows and the Effect on Three-Dimensional Boundary Layer Transition
Int. J. Turbomach. Propuls. Power 2018, 3, 18

Schwarzbach F.; Müller-Schindewolffs Ch.; Bode, Ch.; Herbst, F.:
Effect of the Turbulent Scales on Low-Pressure Turbine Cascade Aerodynamics Part B: Scale Resolving Simulations
Proceedings of the ASME Turbo Expo 2018, 11-15 June, 2018, Oslo, Norway, GT2018-75163;

Schur, F.; Schwarz, H.; Friedrichs, J.:                                
Durchströmung von Bürstendichtung 
AG Turbo COOREFLEX-Turbo, Vorhaben 4.3.1
Fachlicher Abschlussbericht-Forschungsvorhaben 03ET7021R, April 2018

Kellersmann, A.; Weiler, S.; Bode, C.; Friedrichs, J.; Städing, J.; Ramm, G.:
Surface Roughness Impact on Low-Pressure Turbine Performance Due to Operational Deterioration
Journal of Engineering for Gas Turbines and Power, June 2018-Vol 140 No 6

Schur, F.; Friedrichs, J.; Flegler, J.; Georgakis, C.; Polklas, T.:
Pressure Distributions below Brush Seals at Varying Operating Conditions
ASME Turbo Expo 2018; 11.-15.Juni 2018, Oslo, Norwegen

Bauer, M.; Friedrichs, J.; Wulff, D.; Werner Spatz, C.:
Measurement Quality Assessment of an On-Wing Engine Thrust Measuremant System
ASME Turbo Expo 2018; 11.-15.Juni 2018, Oslo, Norwegen 

Reitz, G.; Kellersmann, A.; Friedrichs, J.:
Full High Pressure Compressor Investigations to Determine Aerodynamic Changes Due to Deterioration
ASME Turbo Expo 2018; 11.-15.Juni 2018, Oslo, Norwegen

Hildebrandt, M; Schwarz, H.; Schwitzke, C.; Bauer, H.-J.; Friedrichs, J.:
Effects of the Back Plate Inner Diameter on the Frictional Heat Input and General Performance of Brush Seals
Aerospace 2018, 5, 58;  www.mdpi.com/journal/aerospace

Kožulović, D.; Bode, C.; Friedrichs, J.:
Aerothermodynamic Analysis of Heat Recuperation by a Nozzle-Integrated Thermoelectric Genarator in a Turbofan
Global Power and Propulsion Society (GPPS) Conference 2018, Montreal, Canada, May 07-09, 2018, Paper No. GPPS-2018-0143.

Heykena, C.; Friedrichs, J.; Savoni, L.; Rudnik, R.:
Engine Airframe Integration Sensitivities for a STOL Commercial Aircraft Concept with Over-The-Wing Mounted UHBR-Turbofans
Global Power and Propulsion Society (GPPS) Conference 2018, Montreal, Canada, May 07-09, 2018, Paper No. GPPS-2018-0109.

Giesecke, D.; Bullert, M.; Friedrichs, J.; Stark, U.:
Optimization of High Subsonic, High Reynolds Number Axial Compressor Airfoil Sections for Increased Operating Range
Global Power and Propulsion Society (GPPS) Conference 2018, Montreal, Canada, May 07-09, 2018, Paper No. GPPS-2018-0047.

Kellersmann, A.; Reitz, G.; Friedrichs, J.(2018):
Deterioration effects of coupled blisk blades
Global Power and Propulsion Society (GPPS) Conference 2018, Montreal, Canada, May 07-09, 2018, Paper No. GPPS-2018-0045.

Reitz, G.; Friedrichs, J.:
Impact of Front- and Rear-Stage High Pressure Compressor Deterioration on Jet Engine Performance
International Journal of Turbomachinery, Propulsion and Power. 2018, 3(2), 15.

Kellersmann A, Reitz G, Friedrichs J.(2018):
Sensitivity Analysis of BLISK Airfoil Wear
International Journal of Turbomachinery, Propulsion and Power. 2018; 3(2):14.

Reitz, G., Kellersmann, A., Schlange, S., & Friedrichs, J. (2018)
Comparison of sensitivities to geometrical properties of front and aft high pressure compressor stages
CEAS Aeronautical Journal, 9 (1), 135-146.

Skorpel, A.; Frantzheld, P.; Friedrichs, J.:
Influence of Blade Sweep on Aerodynamics and Acoustics of Low-Pressure Axial Fans
FAN 2018, 18.-20.04.2018, Darmstadt

Budziszewski, N.; Friedrichs, J.:
Modelling of A Boundary Layer Ingesting Propulsor
Energies 2018, 11, 708; doi;10.3390 / en11040708
www.mdpi.com/journal/energies

Büchter, K.-D., Kling, U., Bode, C., Friedrichs, J.:
Estimation of mission fuel savings potential using thermoelectric recuperation in aero-engines
Transportation Research Procedia Vol. 29, page 23–33. doi:10.1016/j.trpro.2018.02.003

Heykena, C.; Friedrichs, J.:
Aerodynamic Investigation of an embedded UHBR-Engine Concept.
Proceedings of GPPS Forum 18 Global Power and Propulsion Society, 10.-12-Januar 2018, Zürich

Aufderheide, T.; Friedrichs, J.; Becker, B.:
Effects of Secondary Air Removal on the Aerodynamic Behaviour of Compressor Cascade Flow.
Proceedings of GPPS Forum 18 Global Power and Propulsion Society, 10.-12-Januar 2018, Zürich

2017

Müller, T.; Giesecke, D.; Friedrichs, J.; Hennings, H.:
Thermodynamic and Rotordynamic Assessment of Conventional and Ultra-High Bypass Ratio Engines.
ISROMAC 2017 - 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Maui, USA, Dec 16-21, 2017

Giesecke, D.; Stark, U.; Harms Garcia, R.; Friedrichs, J.:
Design and Optimization of Compressor Airfoils by Using Class Function / Shape Function Methodology.
ISROMAC 2017 - 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Maui, USA, Dec 16-21, 2017

Aufderheide, T.; Stark, U.; Frantzheld, P.; Friedrichs, J.:
Experimental and numerical investigations of a linear turbine cascade with sweep and dihedral.
ISROMAC 2017 - 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Maui, USA, Dec 16-21, 2017

Kellersmann, A.; Reitz, G.; Friedrichs, J.:
Sensitivity analysis of BLISK airfoil wear.
ISROMAC 2017 - 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Maui, USA, Dec 16-21, 2017

Reitz, G.; Friedrichs, J.:
Impact of Front- and Rear Stage High Pressure Compressor Deterioration on Jet Engine Performance.
ISROMAC 2017 - 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Maui, USA, Dec 16-21, 2017

Bode, Ch.; Friedrichs, J.; Frieling, D.; Herbst, F.:
Improved Turbulence Prediction in Turbomachinery Flows and the Effect on Three-Dimensional Boundary Layer Transition.
ISROMAC 2017 - 17th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Maui, USA, Dec 16-21, 2017

Büchter, K.-D.; Kling, U.; Bode, Ch.; Friedrichs, J.:
Estimation of mission fuel savings potential using thermoelectric recuperation in aero-engines
6th CEAS AIR & SPACE CONFERENCE AEROSPACE EUROPE 2017, 16-20 October 2017, Bukarest, Rumänien

Müller, L.
Aerodynamik der Überflügel-Propeller-Konfiguration
NFL_Forschungsbericht 2017-19, Dissertation

Giesecke, D.; Atalayer, C.; Müller, T.; Friedrichs, J.; Hennings, H.:
Investigation of Intake and Propulsion System for High-Lift Aircraft.
In:  SFB 880 - Fundamentals of high-lift for future commercial aircraft: Biennial Report, 2017, ISBN 978-3-928628-90-7.

Savoni, L.; Heykena, C.; Rudnik, R.; Friedrichs, J.:
Aerodynamic Analysis of Rear Mounted Over-the-Wing Turbofan Engines for Cruise Conditions.
In:  SFB 880 - Fundamentals of high-lift for future commercial aircraft: Biennial Report, 2017, ISBN 978-3-928628-90-7.

Atalayer, C.; Friedrichs, J.; Wulff, D.:
Aerodynamic Investigation of S-Duct Intake for High Power Turboprop installed on a Channel Wing.
The Aeronautical Journal, Volume 121 Number 1242 August/17

Giesecke, D.; Friedrichs, J.; Stark, U.:
Preliminary Aerodynamic Design of a Fan Stage for an Ultra High Bypass Ratio Engine.
ISABE 2017 - 23rd International Society of Air-breathing Engines Conference, Manchester, UK, Sep 3-8, 2017, ISABE-2017-22533

Bauer, M.; Friedrichs, J.; Wulff, D.; Werner-Spatz, C.:
Development and Validation of an On-Wing Engine Thrust Measurement System.
Proc. ASME Turbo Expo 2017, Paper No. GT2017-63277, Charlotte, NC, USA, 2017

Atalayer, C.; Friedrichs, J.; Wulff, D.:
Installation Effects on Highly Loaded Turboprop S-Duct Intake Proximity.
Proc. ASME Turbo Expo 2017, Paper No. GT2017-64714, Charlotte, NC, USA, 2017

Keller, C; Kellersmann, A.; Friedrichs, J.; Seume, J.:
Influence of Geometric Imperfections on Aerodynamic and Aeroelastic Behavior of a Compressor Blisk.
Proc. ASME Turbo Expo 2017, Paper No. GT2017-63556, Charlotte, NC, USA, 2017

Kellersmann, A.; Weiler, S.; Bode, C.; Friedrichs, J.; Staeding, J.; Ramm, G.:
Surface Roughness Impact on Low-Pressure Turbine Performance due to Operational Deterioration.
Proc. ASME Turbo Expo 2017, Paper No. GT2017-64180, Charlotte, NC, USA, 2017

Bode, C.; Friedrichs, J.; Somdalen, R.; Köhler, J.; Büchter, K.-D.; Falter, C.; Kling, U.; Ziolkowski, P.; Zabrocki, P.; Kožulović, D.:
Potential of Future Thermoelectric Energy Recuperation for Aviation.
ASME J. Eng. Gas Turbines Power. 2017; 139(10):101201-101201-9. doi:10.1115/1.4036527

Bode, C.; Friedrichs, J.; Ahrendts, F.; Lemke, N.; Köhler, J.; Kozulovic, D.:
Numerical Flow Simulation of Heat Recuperation in the Exhaust Section of a Turbofan Engine.
AIAA Propulsion and Energy Forum, Atlanta, Georgia, USA, 2017

Delfs, J.W.; Appel, C.; Bernicke, P.; Blech C.; Blinstrub, J.; Heykena, C.; Pradeep Kumar, P.; Kutscherk, K.; Lippitz, N.; Lummer, M.; Rossian, L.; Savoni, L.:
Aircraft and technology for low noise short take-off and landing.
35th AIAA Applied Aerodynamics Conference, AIAA AVIATION Forum, (AIAA 2017-3558).

Kauth, F.; Seume J. R.; Radespiel R., Semaan R.; François D. G.; El Sayed M., Y.; Behr, C.; Schwerter, M.; Leester-Schädel, M.; Vasista, S.; Nolte, F.; Narjes, G.; Müller, J.; Atalayer, C.; Müller, T. and Giesecke, D.: 
Progress in Efficient Active High-Lift.
35th AIAA Applied Aerodynamics Conference, AIAA AVIATION Forum, (AIAA 2017-3559).

Dwinger, K.; Friedrichs, J.:
Validation of a System Theory Model for Aircraft Engine Simulation.
AIAA Modeling and Simulation Technologies Conference, June 2017

Hoeger, M.; Baier, R.D.; Marn, A.; Selic, T.; Niehuis, R.; Gomes, R.; Bode, Ch.; Friedrichs, J.:
IMPACT OF VANE CLOCKING ON THE TEC LOSS IN RIG.
ETC2017; 3.-7. April 2017; Stockholm/Schweden

Atalayer, C.; Friedrichs, J.; Wulff, D.:
Aerodynamic Performance Comparison of High Power Turboprop S-Duct Intake on Channel Wing at Varying Azimuth.
ETC2013; 3.-7. April 2017; Stockholm/Schweden

2016

Raben, M.; Friedrichs, J.; Helmis, T.; Flegler, J.:
Brush Seals Used in Steam Environments-Chronological Wear Development and the Impact of Different Seal Designs.
Journal of Engineering for Gas Turbines and Power; 5/2016, Vol. 138

Tosin, S.; Friedrichs, J.; Dreiss, A.:
Pumping Unit Power-Density Improvement by Application of Couner-Rotating Impellers Design.
Journal of Turbomachinery, November 2016

Krone, J.-H.; Schur, F.; Friedrichs, J.; Huxdorf, O.; Riemenschneider, J.; Monner, H.P.; Wiedemann, M.:
Experimental Investigation and Design of a Shape-Variable Compressor Cascade.
CEAS Aeronautical – 10.1007/s13272-016-0224-1

Bode, C.; Friedrichs, J.; Somdalen, R.; Köhler, J.; Büchter, K.-D.; Falter, C.; Kling, U.; Ziolkowski, P.; Zabrocki, P.; Kožulović, D.:
Potential of Future Thermoelectric Energy Recuperation for Aviation.
ASME IMECE 2016; 11.-17. November 2016; Phoenix, USA

Tosin, S.:
Counter-Rotating Mixed-Flow Pumps Design and Analysis.
NFL-Forschungsbericht 2016-2, Dissertation 2016

Budziszewski, N.; Achmus, M.; Friedrichs, J.; Schrapp, H.:
Investigation of an Axial Compressor with Recirculation Ducts for Performance Enhancement.
Konferenzbeitrag DLRK 2016

Dwinger, K.; Friedrichs, J.:
A System Theory Approach to Model Transient Aircraft Engine Operation.
Konferenzbeitrag DLRK 2016

Skorpel, A.; Dwinger, K.; Hinze, B.; Friedrichs, J.:
Bürgernahes Flugzeug - Entwicklung Schallabsorbierender Auskleidungen zur Beeinflussung der Akustik des Kerntriebwerks.
Konferenzbeitrag DLRK 2016

Reitz, G.; Kellersmann, A.; Schlange S.; Friedrichs, J.:
Comparison of Sensitivities to Geometrical Properties of Front and Aft High Pressure Compressor Stages.
Konferenzbeitrag DLRK 2016

Bode, Ch.; Friedrichs, J.; Müller, Ch.; Herbst, H.:
Application of Crossflow Transition Criteria to Local Correlation-Based Transition Model.
52nd AIAA/SAE/ASEE Joint Propulsion Conference; 25-27 Juli 2016; Salt Lake City

Raben, M.; Schwarz, H.; Friedrichs, J.:
Radial-adaptive Dichtungen für hohe Druckdifferenzen und hohe Temperaturen.
Fkz: 03ET2011C-AG TURBO 2020-Teilprojekt 4.3.1; Abschlussbericht – 2016

Bode, C.; Hoffmann, J.; Stark, U.:
Effects of a skewed inlet boundary layer on aerodynamic performance of a stator-hub equivalent high-turning compressor cascade.
Proc. ASME Turbo Expo, Paper No. GT2016-56087, Seoul (South-Korea), 2016

Giesecke, D.; Friedrichs, J.; Stark, U.; Dierks, M.:
Aerodynamic and Acoustic Performance of a Single Stage Axial Fan with Extensive Blade Sweep Designed to Limit Noise Emissions.
Proc. ASME Turbo Expo, Paper No. GT2016-56555, Seoul (South-Korea), 2016

Hertel, C.; Bode, C.; Kožulović, D.; Schneider, T.:
Particle Image Velocimetry Investigations of a Subsonic Compressor Tandem Cascade.
Proc. ASME Turbo Expo, Paper No. 2016-57726, Seoul, (South-Korea), 2016.

Reitz, G.; Schlange S.; Friedrichs, J.:
Design of Experiments and Numerical Simulation of Deteriorated High Pressure Compressor Airfoils.
Proc. ASME Turbo Expo, Paper No. GT2016-56024, Seoul (South Korea), 2016

Raben, M.; Friedrichs, J.; Flegler, J.:
Brush Seal Frictional Heat Generation – Test Rig Design and Validation Under Steam Environment.
Journal of Engineering for Gas Turbines and Power; 3/2016, Vol. 13 (ASME Turbo Expo 2016 in Seoul, South Korea, June 13-17, 2016)

Reitz, G.; Dwinger, K.; Schlange, S.; Friedrichs, J.:
Analysis of jet engine compressor deterioration and capturing correlations between geometric parameters.
International Symposium on Transport Phenomena and Dynamics of Rotating Machinery 2016 Honolulu, 10.-15. April, 2016

Achmus, M.; Budziszewski, N.; Friedrichs, J.; Schrapp, H.:
Effect of Tip Injection on an Axial Compressor using Airflow Recirculation.
International Symposium on Transport Phenomena and Dynamics of Rotating Machinery 2016 Honolulu, 10.-15. April, 2016

2015

Hertel, Ch.:
Untersuchung der dreidimensionalen Strömung eines hochumlenkenden Tandem-Verdichtergitters
NFL-Forschungsbericht 2015-23, Dissertation 2015

Atalayer, C.; Friedrichs, J.; Wulff, D.:
Geometric and Configuration Sensitivity Analysis of S-duct Intakes for a Highly Loaded Turboprop Engine.
SFB880 – Fundamentals of high-lift for future commercial aircraft Biennial Report; NFL-Forschungsbericht 2015-04

A. Lampert, B. Bernalte Jimenez, G. Gross, D. Wulff; T. Kenull:
One-year observations of the wind distribution and lowlevel jet occurrence at Braunschweig, North German Plain.
Published online in Wiley Online Library (wileyonlinelibrary.com). DOI: 10.1002/we.1951

Reitz, G.; Friedrichs, J.:
Procedure for Analyzing, Manipulating and Meshing of Compressor Blades to Simulate their Flow.
International Gas Turbine Congress 2015 Tokyo, 15.-20. November 2015

Bode, C.; Friedrichs; J. Somdalen, R.; Köhler, J.; Büchter, K.-D.; Falter, C.; Kling, U. Ziolkowski, P.; Zabrocki, K.; Müller, E.; Kožulović, D.:
Thermoelectric Energy Recuperation For Aviation - Project Overview and Potentials.
DGLR 2015, 22.-24. September 2015

Kellersmann, A.; Gilge, P.; Seume, J.; Friedrichs, J.:
Performance Impact of High Pressure Compressor BLISK Roughness.
DLRG 2015, 22.-24. September 2015

Krone, J.-H.; Schur, F.; Friedrichs, J.; Huxdorf, O.; Riemenschneider, J.; Monner, H.P.; Wiedemann, M.:
Experimental Investigation and Design of a Shape-Variable Compressor Cascade. 
DLRG 2015, 22.-24. September 2015 

Schwarz, H.; Friedrichs, J.:
Preliminary Investigations for a Pressure Balanced Back Plate at Low Inclined Brush Seals.
ASME Turbo Expo 2015, 15.-19. Juni 2015, Montreal, Canada

Atalayer, C.; Friedrichs, J.; Wulff, D.:
S-Duct Intake Configuration Sensitivity of a Highly Loaded Turboprop by CFD Methods.
ASME Turbo Expo 2015, 15.-19. Juni 2015, Montreal, Canada

Giesecke, D.; Wehking, M.; Friedrichs, J.; Binner, M.:
A Method for Forecasting the Condition of Several HPT Parts by Using Bayesian Belief Networks.
ASME Turbo Expo 2015, 15.-19. Juni 2015, Montreal, Canada

Brück, Ch.; Lyko, Ch.; Peitsch, D.; Bode, Ch.; Friedrichs, J.; Kožulovć, D.; Fiala, A.; Guendogdu, Y.
Analysis of Maminar-Turbulent Transition of a Low-Loss Generic Low Pressure Turbine Distribution.
ASME Turbo Expo 2015, 15.-19. Juni 2015, Montreal, Canada

Raben, M.; Friedrichs,J.; Flegler, J.; Helmis, T.:
Brush Seals Used in Steam Environments-Chronological Wear Development and the Impact of Different Seal Designs.
ASME Turbo Expo 2015, 15.-19. Juni 2015, Montreal, Canada

Tosin, S.; Friedrichs, J.; Dreiss, A.:
Experimental and Numerical Investigation of a Counter-Rotating Mixed-Flow Single Stage Pump.
ASME Turbo Expo 2015, 15.-19. Juni 2015, Montreal, Canada

Beck, N.; Radespiel, R.; Lenfers, C.; Friedrichs, J.; Rezaeian, A.:
Aerodynamic Effects of Propeller Slipstream on a Wing with Circulation Control.
Journal of Aircraft

Bode, Ch.; Stark, U.; Fard Afshar, N.:
Impact of Skewed Inlet Boundary Layer on the Aerodynamic Performance of a Stator-hub Equivalent High-turning.
International Conference on Fan Noise, Technology and Numerical Methods, 15-17 April 2015 Lyon (France)

Tosin, S.; Friedrichs, J.; Dreiss, A.:
New Design approach for highly loaded Counter-Rotating Mixed-Flow Pump in Cavitation Conditions.
11th European Turbomachinery Conference, 23-27 März 2015, Madrid/Spanien

Igie, U.; Pilidis, P; Giesecke, D.; Minervino, O.; Lambart, P.:
Economic Evaluation of Online Washing for a Heavy Duty Gas Turbine Operation.
Journal of the IDGTE Power Engineer; March 2015, Volume 19 Issue 1

2014

Bode C.; Aufderheide T.; Friedrichs, J.; Kozulovic D.:
Improved Turbulence and Transition Prediction for Turbomachinery Flows.
IMECE2014, 14.-20. November 2014, Montreal, Canada

Krone J.-H.; Friedrichs, J.:
Generation of Intake Distortion due to Angle of Attack for a high Bypass Turbofan Model.
IMECE2014, 14.-20. November 2014, Montreal, Canada

Atalayer, C.; Friedrichs, J.; Wulff, D.:
Sensitivity Analysis of a Highly Loaded Turboprop S-Duct Intake by CFD Methods.
50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Cleveland, Ohio, July 2014

Müller, L.; Kozulovic, D.; Friedrichs, J.:
Unsteady Flow Simulations of an Over-the-wing propeller Configuration.
50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Cleveland, Ohio, July 2014

Lindemann, T.:
Optimale Niederdruck-Axialventilatoren II.
FLT-Abschlussbericht, Heft L237-2014

Schwarz, H.; Friedrichs, J.:
Bürstendichtungen im Verdichter.
Fachlicher Abschlussbericht - Niedersächsisches Forschungszentrum für Luftfahrt - Verbundprojekt Bürgernahes Flugzeug

Kellersmann, A.; Reitz, G.; Friedrichs, J.:
Numerical investigation of circumferential coupled deterioration effects of a jet engine compressor front stage compared to BLISK geometry.
Proceedings of the 3rd International Conference in Through-life Engineering Services, Procidia CIRP, Volume 22 (2014) pp. 249-255

Giesecke, D.; Friedrichs, J.; Kenull, T.; Binner, M.; Siegert, M.:
Forecasting the Repair of HPT NGVs
7. Dresdner Probabilistik-Workshop, 8.-9. Oktober 2014, Dresden

Bauer, M.; Wulff, D.; Friedrichs, J.:
Bürgernahes Flugzeug-Versuchstechnik für den Hochleistungspropeller eines Windkanalmodells.
DGLR 2014, 16.-18. September 2014, Augsburg

Tosin, S., Friedrichs, J., Farooqi, R., Dreiss, A.:
New approach for Multi-Rotor Mixed-Flow Pump Design and Optimization. FEDSM2014-21595, Proceedings of the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting, FEDSM2014, August 3-7, 2014, Chicago, Illinois, USA.

Tosin, S., Friedrichs, J., Sperling, J., Kozulovic, D.:
Aerodynamic Optimization for Multi-Rotor of Turbo Prop Turbine Blades using a Response Surface Methodology based Algorithm. FEDSM2014-21752, Proceedings of the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting, FEDSM2014, August 3-7, 2014, Chicago, Illinois, USA.

Aufderheide, T.; Bode, C.;  Kožulović, D.; Friedrichs, J.:
The Generation Of Higher Levels Of Turbulence In A Low-Speed Cascade Wind Tunnel By Pressureized Tubes.
Proc. ECCOMAS, Paper No.2331, Barcelona (Spain), 2014.

Bode, Ch.; Aufderheide, Th.; Kožulović, D.; Friedrichs, J.:
Correlation Based Inlet Boundary Conditions for Improved Turbulence and Transition Prediction in Turbomachinery Flows.
WCCM XI ECCM V ECFD VI; 20.-25.07.2014; Barcelona, Spain

Lindemann, T.B.; Friedrichs, J.; Stark, U.:
Development of a new Design Method for High Efficiency Swept Low Pressure Axial Fans with Small Hub/Tip Ratio
ASME Turbo Expo 2014, 16.-20. Juni 2014, Düsseldorf, Germany

Hertel, Ch.; Bode, Ch.; Kožulović, D.; Schneider, T.:
Investigations on Aerodynamic Loading Limits of Subsonic Compressor Tandem Cascades: End Wall Flow
ASME Turbo Expo 2014, 16.-20. Juni 2014, Düsseldorf, Germany

Bode, Ch.; Aufderheide, T.; Kožulović, D.; Friedrichs, J.:
The Effects of Turbulence Length Scale on Turbulence and Transition Prediction in Turbomachinery Flows
ASME Turbo Expo 2014, 16.-20. Juni 2014, Düsseldorf, Germany

Schwarz, H.; Friedrichs, J.; Flegler, J.:
Axial Inclination of the Bristle Pack, a new Design Parameter of Brush Seals for Improved Operational Behavior in Steam Turbines
Procedings of ASME Turbo Expo 2014, GT 2014, June 16-20, 2014, Düsseldorf, Germany

Giesecke, D.; Kenull, T.; Friedrichs, J.; Binner, M.; Siegert, M.:
A Method for Forecasting the Condition of HPT NGV’s by using Bayesian Belief Networks and a Statistical Approach. Proceedings of ASME Turbo Expo 2014: Power for Land, Sea and Air, June 3-7, 2014, Duesseldorf, Germany, Paper Number: GT2014-25464.

Reitz, G.; Friedrichs, J.; Marx, J.; Städing, J.:
Performance Analysis of Deteriorated High Pressure Compressor Blades
Proc. ASME Turbo Expo, Paper No. GT2014-25544, Düsseldorf (Germany), 2014.

2013

Hertel, Ch.; Bode, Ch.; Kožulović, D.; Schneider, T.
Investigations on Aerodynamic Loading Limits of Subsonic Compressor Tandem Cascades: Midspan Flow
ASMEIMECE2013, 15.-21. November 2013, San Diego, California, USA

Marx, J.; Städing, J.; Reitz, G.; Friedrichs, J.:
Investigations and Analysis of Deterioration in High Pressure Compressors
Proc. Deutscher Luft- und Raumfahrtkongress, No. DLRK 2013- 301161, Stuttgart, Germany

Müller, L.; Kozulovic, D.; Radespiel, R.:
Aerodynamic Performance of an Over-The Wing Propeller Configuration at Increasing Mach Number
Proc. Deutscher Luft- und Raumfahrtkongress, Stuttgart, Germany

Raben, M.; Schwarz, H.; Friedrichs, J.:
Operating Performance and Wear Investigations of Brush Seals for Steam Turbine Applications.
Proceedings of ASME Turbo Expo 2013, GT2013, June 3-7, 2013, San Antonio, USA.

Seume, J.; Burnazzi, M.; Schwerter, M.; Behr, C.; Rudenko, A.; Schmitz, A.; Dörbaum, M,; Atalayer, C.:
SFB 880 – Efficient High Lift
DLRK 2013, 10.-12. September 2013, Stuttgart

2012

Städing, J.:
Untersuchung der Wirkungsweise von Stator- und Rotor-Clocking in Axialverdichtern
Mitteilungen des Instituts für Flugantriebe und Strömungsmaschinen, Heft 17, November 2012, 219 S., Dissertation TU Braunschweig 2012, Verlag und Bildarchiv W. H. Faragallah

Giesecke, D.; Igie, U.; Pilidis, P.; Ramsden, K.; Lambart, P.:
Performance and Techno-Economic Investigation of On-Wing Compressor Wash for a Short-Range Aero Engine.
ASME Turbo Expo 2012 in Copenhagen, Denmark, June 11-15, 2012, Paper Number: GT2012-68995

Müller, L.; Kozulovic, D.; Hepperle, M.; Radespiel, R.:
Installation Effects of a Propeller Over a Wing with Internally Blown Flaps.
Proc. of the 30th AIAA Applied Aerodynamics Conference, No. AIAA, 2012-3335, New Orleans, LA (USA)

Müller, L.; Kozulovic, D.; Hepperle, M.; Radespiel, R.:
The Influence of the Propeller Position on the Aerodynamics of a Channel Wing.
Proc. of 61. Deutscher Luft- und Raumfahrtkongress, No. DLRK 2012-281259, Berlin (Germany)

Fischer, S.; Müller, L.; Saathoff, H.;Kožulović, D.:
Three-Dimensional Flow Through a Compressor Cascade With Circulation Control.
Proc. ASME Turbo Expo, Paper No. GT2012-68593, Copenhagen (Denmark), 2012.

Rüdiger, S.; Friedrichs, J.:
Windkanalexperiment für aktiven Hochauftrieb und Triebwerksintegration.
Kolloquium Fluidenergiemaschinen, 20.-21.03.2012, Karlsruhe.

Skara, V.; Friedrichs, J.; Kosyna, G.:
Vortex Cavitation Occuring in Radial and Mixed Flow Centrifugal Pump Impellers at Part Load Operation.
International Rotating Equipment Conference 2012, September 27-28, 2012, Düsseldorf. (BEST PAPER AWARD)

Lindemann, Th. B.; Friedrichs, J.; Kosyna, G.:
Development of a new Design Approach for High Efficiency Low Pressure Axial Fans with Small Hub Ratio.
Conference on Modelling Fluid Flow (CMFF'12). The 15th International Conference on Fluid Flow Technologies, September 4-7, 2012, Budapest, Hungary.

Krone, J.-H.:
Design of a Fan-Test-Facility with Axial Flow and Crosswind Capabilities.
International Symposium "Simulation of Wing and Nacelle Stall", June 21-22, 2012, Braunschweig.

Krone, J.-H.; Friedrichs, J.; Städing, J.:
Performance Study of Deterioration Effects of a Jet Engine High Pressure Compressor Stage.
DLRK2012_281377. 61. Deutscher Luft- und Raumfahrtkongress. 10.-12. September 2012, Berlin.

Krone, J.-H.; Friedrichs, J.:
Design of a Fan-Test-Facility with Axial Flow and Crosswind Capabilities.
ISROMAC-2012-1170. 14th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Honolulu, HI, USA, Feb. 27 - March 2, 2012.

Schwarz, H.; Friedrichs, J.; Flegler, J.:
Design Parameters of Brush Seals and their Impact on Seal Performance.
Proceedings of ASME Turbo Expo 2012, GT2012, June 11-15, 2012, Copenhagen, Denmark.

Schwarz H.; Friedrichs J.; Kosyna G.:
Hochleistungs-Bürstendichtungen für große Druckgefälle
Fachlicher Abschlussbericht, AG TURBO COORETEC, 2012, Braunschweig.

Städing, J.; Friedrichs, J.; Waitz, T.; Dobriloff, C.; Becker, B.; Gümmer, V.:
The Potential of Rotor and Stator Clocking in a 2.5-Stage Low-Speed Axial Compressor. 
ASME Turbo Expo 2012, 11.-15. Juni 2012, Kopenhagen.

Lindemann, Th.:
Optimale Niederdruckaxialventilatoren für den Einsatz bei kleinen Reynoldszahlen. 
FLT-Abschlussbericht, Heft L224-2011, 2012.

Bode, C.; Kožulović, D.; Stark, U; Hoheisel, H.:
Boundray Layer Development Of A High Turning Compressor Cascade At Sub- And Supercritical Flow Conditions.
Proc. ASME Turbo Expo, Paper No. GT2012-68362, Copenhagen (Denmark), 2012.

Razzaqi, S. A.; Bode, C.; Eggers, T.; Smart, M. K.:
Development of Functional Relationships for Air-Data Estimation using Numerical Simulations.
Proc. 18th Australasian Fluid Mechanics Conference, 3.-7. December, Paper No. 192, Launceston (Australia), 2012

2011

Rüdiger, S.; Friedrichs, J.; Lenfers, C.:
Antrieb und Messtechnik für einen Propeller an einem Windkanalmodell.
60. Deutscher Luft- und Raumfahrtkongress. 27.-29. September 2011, Bremen.

Friedrichs, J.:
Überholung von Großtriebwerken - Einsatzoptimierte Systemregeneration.
Kolloquium des SFB871. April 2011. http://www.sfb871.de/135.html

Beck, N.; Lenfers, C.; Rüdiger, S.:
Design of a Windtunnel Experiment for Active High Lift and Engine Interactions.
Campus Research Aircraft Symposium: Active High Lift and Impact on Air Transportation. April 11-12, 2011, Braunschweig.

Ebmeyer, C.; Wensky, T.; Friedrichs, J.; Zachau, U.:
Evaluation of Total Engine performance Degradation based on Modular Efficiencies.
Proc. of ASME Turbo Expo 2011. Power for Land, Sea and Air, GT2010-45839. June 6-11, 2011, Vancouver, Canada.

Städing, J.; Becker, B.; Gümmer, V.; Kosyna, G.; Wulff, D.:
An Experimental Investigation of Stator Clocking Effects in a Two-Stage Low-Speed Axial Compressor.
Proc. of ASME Turbo Expo 2011. Power for Land, Sea and Air, GT2011-45680. June 6-11, 2011, Vancouver, Canada, 2011.

Müller, L.; Kožulović, D.; Wulff, D.; Fischer, S.; Stark, U.:
High Turning Compressor Tandem Cascade for High Subsonic Flows - Part 2: Numerical and Experimental Investigations.
Proc. 47th Joint Prop., Paper No. AIAA-2011-5602, San Diego (California, USA), 2011.

Müller, L.; Hoeger, M.; Kožulović, D.; Stark, U.:
Experimental and Numerical Evaluation of a High Turning Transonic Compressor Stator Cascade at Flight Idle Conditions.
Conference Proc., 9th European Conference on Turbomachinery - Fluid Dynamics and Thermodynamics, Istanbul (Turkey), 2011.

Bode, C.; Kožulović, D.; Franke, M.; Westhäuser, K.:
Incorporating the Effects of Turbulence Length Scale in Turbulence and Transition Models for Turbomachinery Flows.
Proc. 60th DLRK, Paper No. DLRK2011-241466, Bremen (Germany), 2011.

2010

Ahmed, S.:
Condition monitoring, diagnostic and controlling tool for boiler feed pump. 
Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen, Heft 16, Juni 2010, 110 S., Dissertation TU Braunschweig 2010, Verlag und Bildarchiv W. H. Faragallah

Bischoff, S.:
Miniaturisierte Hochdrehzahl-Kühlmittelpumpen für Kfz-Motoren.
Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen, Heft 14, Januar 2010, 179 S., Dissertation TU Braunschweig 2010, Verlag und Bildarchiv W. H. Faragallah

Kenull, Th.:
Motorstromanalyse mit Frequenzumrichter - ein Verfahren zur Verbesserung der Diagnosegüte bei gestörten Stromaufnahmesignalen.
9. Tagung Technische Diagnostik 2010, 28.-29. Oktober 2010, Merseburg.

Rüdiger, S.; Beck, N.; Lenfers, C.:
Windkanalexperiment für aktiven Hochauftrieb und Triebwerksintegration.
Forschungstag Campus Forschungsflughafen 2010. 28. Oktober 2010, Braunschweig.

Wensky, T.; Friedrichs, J.; Winkler, L.:
Enviromental Influences on Engine Performance Degradation.
Proc. of ASME Turbo Expo 2010. Power for Land, Sea and Air, GT2010-22748. June 14-18, 2010, Glasgow.

Ahmed, S.; Leithner, R.; Kosyna, G.:
Condition Monitoring, Diagnostic and Controlling Tool for Boiler Feed Pump.
VGB Fachtagung: Dampfturbinen und Dampfturbinenbetrieb 2010; 30.06.-01.07.2010; Lübeck.

Büscher, S.:
Untersuchung von mehrstufigen Bürstendichtungen für Dampfturbinen.
Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen, Heft 15, Juni 2010, 156 S., Dissertation Technische Universität Braunschweig 2009, Verlag und Bildarchiv W. H. Faragallah

Schwarz H.; Kosyna G.; Flegler J.:
Experimentelle Untersuchungen zur radialen Adaptivität von Bürstendichtungen,
VGB Fachtagung, Dampfturbinen und Dampfturbinenbetrieb 2010, Lübeck.

Lindemann, Th.; Kosyna, G.; Wulff, D.:
Wirkungsgradoptimierte Wahl der Drallverteilung bei Niederdruck-Axialventilatoren mit kleinen Nabenverhältnissen.
VDI-Berichte 2112, VDI-Fachtagung "Ventilatoren: Entwicklung-Planung-Betrieb", 16.-17.11.2010, Braunschweig.

Bode, C.; Eggers, Th.; Smart, M.:
Development of a Flush Air Data System for the hypersonic flight experiment HIFiRE 7.
In H. P. Kreplin, editor, New Results in Numerical and Experimental Fluid Mechanics VIII: Contributions to the 17th STAB/DGLR Symposium Berlin, Germany, 2010, Notes on Numerical Fluid Mechanics and Multidisciplinary Design, Springer.

Bischof, S.; Kosyna, G.:
Miniaturized high speed motor coolant pumps.
ISROMAC-13; 4.-7. April 2010; Honolulu.

2009

Schwarz H.; Büscher S.; Kosyna G.:
Weiterentwicklung mehrstufiger Bürstendichtungen für Dampfturbinen.
Fachlicher Abschlussbericht, AG TURBO COOREFF-T, 2009, Braunschweig.

Perez, P.; Kosyna, G.; Benra, F.-K.; Dohmen, H.-J.; Gandhi, B. K.; Kumar, M.:
Improvement of axial-flow pump part load behaviour - an experimental and numerical study
CMFF’09, Conference on Modelling Fluid Flow, S. 798-804, 9.-12. September 2009, Budapest.

Dobrzynski, B.:
Untersuchung von Methoden der aktiven Strömungsbeeinflussung zur Erweiterung des Arbeitsbereiches von Axialverdichtern. Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen, Heft 13, Sept. 2009, 133 S., Dissertation TU Braunschweig 2009, Verlag und Bildarchiv W. H. Faragallah

2008

Schwarz H.; Büscher S.; Kosyna G.; Flegler J.:
Bürstendichtungen für Dampfturbinen, 11. Status Seminar der AG TURBO COOREFF-T, 2008, Köln.

Ahmed, S.; Leithner, R.; Kosyna, G.:
Increasing life time and reliability of a large boiler feed water pump by means FEM-CFD (Finite element method – Computational fluid dynamics) simulations
Pump Users International Forum 2008, 28.-29. Oktober 2008; Düsseldorf.

Pérez Flores, P.; Kosyna, G. ; Wulff, D.:
Performance curve stabilisation of axial pumps by passive flow control
Pump Users International Forum 2008, 28.-29. Oktober 2008; Düsseldorf.

Pérez Flores, P.; Kosyna, G. ; Wulff, D.:
Suppression of Performance Curve Instability of an Axial-Flow Pump by Using a Double-Inlet Nozzle.
ISROMAC12-2008-20028, 17.-22. Februar 2008; Honolulu, Hawaii. s.a.: International Journal of Rotating Machinery, vol. 2008, Article ID 536850, 7 pages, 2008. doi:10.1155/2008/536850.

Dobrzynski, B.; Saathoff, H.; Kosyna, G.; Clemen, C.; Gümmer, V.:
Active Flow Control in a Single-Stage Axial Compressor using Tip Injection and Endwall Boundary Layer Removal.
ASME Turbo Expo; 9.-13. Juni 2008; Berlin, Germany. PAPER: GT2008-50214.

Müller-Petersen, R.;
Entwicklung eines Zustandsdiagnosesystems für Unterwassermotorpumpen.
Dissertation TU Braunschweig 2008; Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen Heft 12, März 2008, Verlag und Bildarchiv W. H. Faragallah

Rohkamm, H.:
Betriebsverhalten aerodynamisch hochbelasteter Axialverdichterstufen bei Modifikation der äußeren Schaufelenden im Rotor.
Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen, Heft 11, Jan. 2008, 168 S., Dissertation TU Braunschweig 2008, Verlag und Bildarchiv W. H. Faragallah

2007

Dobrzynski, B.; Saathoff, H.; Kosyna G.:
Influence of the Rotor Tip Stagger Angle on Axial Compressor Stall Inception.
ETC 7th European Conference on Turbomachinery; 5.-9. März 2007, Athen, Griechenland.

2006

Goltz, I.:
Entstehung und Unterdrückung der Kennlinieninstabilität einer Axialpumpe.
Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen, Heft 10, März 2006, 173 S., Dissertation TU Braunschweig 2006, Verlag und Bildarchiv W. H. Faragallah

Dobrzynski, B.; Saathoff, H.; Kosyna G.:
Stall Inception in Axial-Flow Compressors with and without an Inlet Guide Vane.
Proceedings of the CMFF'06, pp. 1147-1154, 2006.

Dobrzynski, B.; Saathoff, H.; Kosyna G.:
Strömungsabriss in Axialverdichtern mit 3D Beschaufelung.
VDI-Berichte Nr. 1922, S 327-341, 2006.

Müller-Petersen, R.; Kenull, Th.; Kosyna, G.:
Condition Monitoring of Pumps by Means of Motor Current Signal Analysis - Field Test and Practical Application.
23th IAHR Symposium - 17.10.-21.10.2006, Yokohama.

Müller-Petersen, R.; Kenull, Th.; Kosyna, G.:
Störungsfrüherkennung an Kreiselpumpen mit Hilfe der Motorstromanalyse - Vom Feldtest zur Anwendung.
VDI Berichte 1963 Seite 441-453, VDI-GET Tagung Elektrisch-Mechanische Antriebssysteme,  27.-28.09.06, Böblingen.

Wulff, D.:
Unsteady Pressure and Velocity Measurements in Pumps.
RTO-EN-AVT-143 Design and Analysis of High Speed Pumps; Lecture Series held at the von Karmann Institute; 20.-23. März 2006; Rhode St. Genese; Belgien

Wulff, D.:
PIV Measurements in Pumps.
RTO-EN-AVT-143 Design and Analysis of High Speed Pumps; Lecture Series held at the von Karmann Institute; 20.-23. März 2006; Rhode St. Genese; Belgien

2005

Kosyna, G.; Goltz, I.; Stark, U.:
Flow Structure of an Axial-Flow Pump from Stable Operation to Deep Stall.
FEDSM2005-77350, 2005 ASME Fluids Engineering Summer Conference, Houston Texas, USA, June 19-23, 2005.

Dobrzynski, B.; Saathoff, H.; Kosyna, G.:
Strömungsabriss in Niedergeschwindigkeitsverdichtern mit und ohne Vorleitrad.
21. Strömungstechnische Tagung, Dresden, 30. September 2005.

Rohkamm, H.; Kosyna, G.; Saathoff, H.; Stark, U.:
Enhancement of Higly-Loaded Axial Compressor Stage Performance Using Rotor Blade Tip Tailoring, Part 2 - Experimental Results.
6th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, Lille, France, 07.-11. March 2005.

2004

Müller-Petersen, R.; Kenull, Th.; Kosyna, G.:
Motorstromüberwachung zur Online-Diagnose von Unterwasserpumpen im Feldversuch.
6. Tagung Technische Diagnostik 2004, 21.-22. Oktober 2004, Merseburg.

Goltz, I.; Kosyna, G.; Wulff, D.; Stark, U.; Saathoff, H.; Bross, S.:
Kennlinieninstabilität einer Axialpumpe: Entstehung und Vermeidung.
Internationales Pumpenanwenderforum 2004, 29.-30. September 2004, Karlsruhe.

Goltz, I.; Kosyna, G.; Wulff, D.; Schrapp, H.; Stark, U.; Saathoff, H.; Bross, S.:
Structure of the Rotor Tip Flow in a Highly Loaded Single-Stage Axial-Flow Pump Approaching Stall. Part I: Breakdown of the Tip-Clearance Vortex.
2004 ASME Heat Transfer/Fluids Engineering Summer Conference Westin Charlotte & Convention Center. Charlotte, North Carolina, USA, July 11-15, 2004.

Goltz, I.; Kosyna, G.; Wulff, D.; Schrapp, H.; Stark, U.; Saathoff, H.; Bross, S.:
Structure of the Rotor Tip Flow in a Highly Loaded Single-Stage Axial-Flow Pump Approaching Stall. Part II: Stall Inception - Understanding the Mechanism and Overcoming its Negative Impacts.
2004 ASME Heat Transfer/Fluids Engineering Summer Conference Westin Charlotte & Convention Center. Charlotte, North Carolina, USA, July 11-15, 2004.

Goltz, I.; Kosyna, G.; Wulff, D.; Schrapp, H.; Bross, S.:
Part Load Operating Performance and Stall Inception of a Single-Stage Axial-Flow Pump.
The 10th of International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Honlulu, Hawaii, March 07-11, 2004.

Clemen, C.; Gümmer, V.; Goller, M.; Rohkamm, H.; Stark, U.; Saathoff, H.
Tip-Aerodynamics of Forward Swept Rotor Blades in a Highly-Loaded Single-Stage Axial-Flow Low-Speed Compressor.
The 10th of  International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, Honolulu, Hawaii, March 07-11, 2004.

Saathoff, H.; Kosyna, G.:
Ansatzpunkte für weitere Wirkungsgradsteigerung und Arbeitsbereichserweiterung bei einstufigen Axialventilatoren.
FLT-Fachtagung "Ventilatoren"; Frankfurt, 9. Februar 2004.

Müller-Petersen, R.; Kenull, T.; Kosyna, G.:
Zustandsdiagnose an Kreiselpumpen durch Online-Überwachung der Motorstromaufnahme im Feldversuch.
Pump User's International Forum, Karlsruhe, 2004

2003

Friedrichs, J.; Kosyna, G.:
Unsteady PIV Flow Field Analysis of a Centrifugal Pump Impeller under Rotating Cavitation. Fifth International Symposium on Cavitation (Cav 2003); November 1-4, 2003. Osaka, Japan.

Friedrichs, J.:
Auswirkungen instationärer Kavitationsformen auf Förderhöhenabfall und Kennlinineninstabilität von Kreiselpumpen.
Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen, Heft 9, März 2003, 185 S., Dissertation TU Braunschweig 2003, Verlag und Bildarchiv W. H. Faragallah

Goltz, I.; Kosyna, G.; Stark, U.; Saathoff, H.; Bross, S.:
Stall Inception Phenomena in a Single-Stage Axial-Flow-Pump.
5th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, March 17-22, 2003. Praha-Czech Republic.

Büscher, S.; Kosyna, G.; Urlichs, K.:
Erprobung von Bürstendichtungen für den Einsatz in Dampfturbinen,
XXXV Kraftwerkstechnisches Kolloqium, Dresden, 23. und 24. September 2003, Vorträge V1-V24, Technische Universität Dresden.

Kosyna G.; Krasmann, H.; Baumgarten, S.; Rohdenburg, M.; Friedrichs, J.; Rohkamm, H.:
Axialventilatoren. Ventilatoren - 3 Axialventilatoren, 2. Auflage 2003, Vulkan-Verlag, ISBN 3-8027-3200-6.

Burkhardt, O.; Nitsche, W.; Rohkamm, H.; Kosyna, G.; Goller, M.; Swoboda, M.; Gümmer, V.:
Rotor-Stator Interaction in a Highly-Loaded Single-Stage Low-Speed Axial Compressor - Unsteady Measurements in the Rotor Relative Frame.
10th ISUAAAT, Duke University, Durham, North Carolina, September 7-11, 2003.

Rohkamm, H.; Wulff, D.; Kosyna, G.; Saathoff, H.; Stark, U.; Gümmer, V.; Swoboda, M.; Goller, M.:
The Impact of Rotor Tip Sweep on the Three-Dimensional Flow in a Highly-Loaded Single-Stage Low-Speed Axial Compressor. Part II - Test Facility and Experimental Results.
5th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, March 17-22, 2003. Praha-Czech Republic.

Kenull, T.; Canders, W.; Kosyna, G.:
Formation of Self-Excited Vibrations in Wet Rotor Motors and their Influence on the Motor Current.
ETEP Vol. 13 (2003) No. 2, S. 119-126; VDE-Verlag, Berlin-Offenbach

Rohdenburg, M.:
Kennfeldberechnungsverfahren für Axialventilatoren mit Berücksichtigung der Naben- und Gehäusegrenzschichten.
Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen, Heft 8, Feb. 2003, 163 S., Dissertation TU Braunschweig 2003, Verlag und Bildarchiv W. H. Faragallah

2002

Suryawijaya, P.; Kosyna, G.:
Unsteady Measurement of the Static Pressure on the Impeller Blade Surfaces and Optical Observations on Centrifugal Pumps Under Varying Liquid/Gas Two-Phase Flow Conditions.
German-Japanese Workshop on Multi-Phase Flow, Forschungszentrum Karlsruhe, August 25-27, 2002.

Friedrichs, J.; Kosyna, G.:
Experimental and Numerical Investigation of the Performance Instability in a Mixed-Flow Impeller.
Proceedings of ASME FEDSM'02. 2002 ASME Fluids Engineering Division Summer Meeting, Montreal, Canada, July 14-18, 2002. FEDSM2002-32326

Frobenius, M.; Schilling, R.; Friedrichs, J.; Kosyna, G.:
Numerical and Experimental Investigations of the Cavitating Flow in a Centrifugal Pump Impeller.
Proceedings of ASME FEDSM'02. 2002 ASME Fluids Engineering Division Summer Meeting, Montreal, Canada, July 14-18, 2002. FEDSM2002-31006

Saathoff, H.; Deppe, A.; Stark, U.; Rohdenburg, M.; Rohkamm, H.; Wulff, D.; Kosyna, G:
Steady and Unsteady Casingwall Flow Phenomena in a Single Stage Low Speed Compressor at Part-Load Conditions.
9th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, February 10-14, 2002, Honolulu, Hawaii, USA.
auch erschienen: International Journal of Rotating Machinery, 9: 327-335.

2001

Kenull, Th.; Kosyna, G.:
Nutzung des Elektromotors als Sensor zur Zustandsdiagnose an Kreiselpumpen.
Monitoring-, Diagnose- und USV-Systeme: Tagung Braunschweig 6./7. November 2001, VDI-Berichte 1641, S. 197-206; VDI-Verlag, Düsseldorf

Kosyna, G.:
Betriebsverhalten von Kreiselpumpen.
Haus der Technik e.V. - Fachtagung "Kreiselpumpen - Forschung und Entwicklung", Berlin, 22.11.-24.11.2001.

Berntsen, G.; Kjeldsen, M.; Müller, R.:
Cavitation Induced Dynamics in Hydraulic Machinery.
IAHR 10th International Meeting of the Work Group on The Behaviour of Hydraulic Machinery Under Steady Oscillatory Conditions, Trondheim, Norwegen, 26.-28. Juni 2001.

Hofmann, M.; Stoffel, B.; Friedrichs, J.; Kosyna, G.:
Similarities and Geometrical Effects on Rotating Cavitation in Two Scaled Centrifugal Pumps.
CAV 2001, 4th International Symposium on Cavitation, Pasadena, California, USA, 20-23 June, 2001

Friedrichs, J.; Kosyna, G.:
Rotating Cavitation in a Centrifugal Pump Impeller of Low Specific Speed.
Proceedings of ASME FEDSM'01. 2001 ASME Fluids Engineering Division Summer Meeting, New Orleans, Louisiana, May 29 -June 1, 2001. FEDSM2001-18084. Journal of Fluids Engineering, Vol. 124, June 2002, pp. 356-362

Rohdenburg, M.; Kosyna, G.:
Experimentelle Bestimmung der Grenzschichtparameter von Axialventilatorstufen als Basis für Kennfeldberechnungen.
Ventilatoren: Entwicklung - Planung - Betrieb; VDI-Tagung Braunschweig 20./21. Februar 2001. VDI-Berichte 1591; S. 361-376

Dobat, A.; Saathoff, H.; Wulff, D.:
Experimentelle Untersuchungen zur Entstehung von Rotating Stall in Axialventilatoren.
Ventilatoren: Entwicklung - Planung - Betrieb; VDI-Tagung Braunschweig 20./21. Februar 2001.VDI-Berichte 1591; S. 345-360.

2000

Suryawijaya, P.; Kosyna, G.:
Schaufeldruckmessungen im rotierenden System an einer Radialpumpe bei Gas/Flüssigkeitsgemischförderung.
Chemie Ingenieur Technik, 72, November 2000, S. 1366-1371, WILEY-VCH Verlag GmbH, Weinheim.

Kosyna, G.; Suryawijaya, P.; Friedrichs, J.:
Improved understanding of two phase flow phenomena based on instationary blade pressure measurement.
Fluid and Heat Engineering Scientific Conference on the 70th birthday of Professor Tibor Czibere, Miskolc, October 20th, 2000

Friedrichs, J.; Kosyna, G.; Dreiß, A.; Thamsen, P.-U.:
Betriebssichere Axiallager - eine zentrale Voraussetzung für den wirtschaftlichen Einsatz von Unterwasserpumpen.
Pumpentagung Karlsruhe, 10.-12. Oktober 2000, Sektion 7-2, VDMA Frankfurt.

Friedrichs, J.; Baumgarten, S.; Kosyna, G.; Stark, U.:
Effect of Stator Design on Stator Boundary Layer Flow in a Highly Loaded Single-Stage Axial-Flow Low-Speed Compressor.
Proceedings of ASME Turbo Expo 2000, May 8-11, 2000, Munich, Germany. 2000-GT-0616, ASME Journal of Turbomachinery, July 2001, Vol. 123, page 483-489

1999

Friedrichs, J.; Baumgarten, S.; Stark, U.:
Effect of stator design on stator hub boundary layer separation in a highly loaded single-stage axial flow low-speed compressor.
Third European Conference on Turbomachinery-Fluid Dynamics and Thermodynamics, Volume B, page 573-582; March 2.-5., London, IMechE, 1999

Kenull, Th.:
Zustandsdiagnose an Kreiselpumpen anhand instationärer Schwankungen der Motorstromaufnahme.
Dissertation TU Braunschweig 1998; Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen Heft 7, Februar 1999, Verlag und Bildarchiv W. H. Faragallah

1998

Kenull, Th.; Kosyna, G.:
Betriebsüberwachung an Unterwasserpumpen durch Messung instationärer Schwankungen in der Motorstromaufnahme.
3R interantional, Heft12, Dez. 1998, S. 823-828; Vulkan-Verlag, Essen

Baumgarten, S.:
Untersuchungen zur Auslegung von unprofilierten Nachleitradbeschaufelungen bei hochbelasteten Axialventilatoren.
Dissertation TU Braunschweig 1998; Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen Heft 6, Juli 1998, Verlag und Bildarchiv W. H. Faragallah

1997

Kenull, Th.; Kosyna, G.:
Betriebsüberwachung und Früherkennung von Schäden an Unterwasserpumpen.
Industriepumpen + Kompressoren, Heft1, März 1997, S. 15-21, Vulkan-Verlag, Essen

Kenull, Th.; Kosyna, G.; Thamsen, P.-U.:
Diagnostics of Submersible Motor Pumps by Non-Stationary Signals in Motorcurrent.
The 1997 ASME Fluids Engineering Division Summer Meeting FEDSM'97, S. 1-11, June 22-26, 1997 Hrsg.: ASME

Dreiß, A.:
Untersuchung der Laufradkavitation einer radialen Kreiselpumpe durch instationäre Druckmessungen im rotierenden System.
Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen, Heft 5, Sept. 1997, S. 1-102, Dissertation TU Braunschweig 1997, Verlag und Bildarchiv W. H. Faragallah

Schmidt, Th.:
Experimentelle Untersuchungen zum Saugverhalten von Kreiselpumpen mittlerer spezifischer Drehzahl bei Teillast.
Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen, Heft 5, Sept. 1997, S.103-247, Dissertation TU Braunschweig 1997, Verlag und Bildarchiv W. H. Faragallah

Spohnholtz, H.-H.:
NPSH-Verhalten von Halbaxialpumpen bei Teillast.
Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen, Heft 4, Jan. 1997, Dissertation, TU Braunschweig 1995, Verlag und Bildarchiv W. H. Faragallah

Dreiß, A.; Kosyna, G.:
Experimental Investigations of Cavitation-States in a Radial Pump Impeller.
JSME CENTENNIAL GRAND CONGRESS Proceedings of International Conference on Fluid Engineering, Vol 1, S. 231-238 Tokyo, Japan: July 13-16, 1997 Hrsg.: JSME.

Dreiß, A.; Kosyna, G.:
The Influence of Unsteady Cavitation Effects on the Shape of NPSH-Head-Drop-Curves.
Proceedings of the 2nd JAPANESE-GERMAN SYMPOSIUM on Multi-Phase Flow Tokyo, Japan: September 25-27, 1997, S. 435-446 Hrsg.: JSPS.

Baumgarten, S.; Friedrichs, J.:
Strömungsgeschehen im Nachleitrad aerodynamisch hochbelasteter Axialventilatoren.
The Fifth Conference INDUSTRIAL FANS Zakapone 6-8th October 1997, Gleiwitz, S. 435-446 Hrsg.: Politechnika Slaska, Gleiwitz.

1996

Kenull, Th.; Kosyna, G.:
Betriebsüberwachung und Früherkennung von Schäden an Unterwasserpumpen durch Online-Messung instationärer Schwankungen der Stromaufnahme. Pumpentagung Karlsruhe, 30.09.-02.10.1996, Sektion A5, S. 3-13, Hrsg.: VDMA, Frankfurt/M.

Schmidt, T.; Wulff, D.; Kosyna, G.; Spohnholtz, H.-H.:
NPSH-Verhalten von Halbaxialpumpen bei Teillast.
Pumpentagung Karlsruhe, 30.09.-02.10.1996, Sektion C5, S. 3-16 Hrsg.: VDMA, Frankfurt/M.

Dreiß, A.; Schütte, V.:
Numerische und experimentelle Untersuchungen von Kavitationszuständen im Laufrad einer radialen Kreiselpumpe.
Pumpentagung Karlsruhe, 30.09.-02.10.1996, Sektion C5, S. 3-17 Hrsg.: VDMA, Frankfurt/M.

Krasmann, H.:
Einfluß von nichtrotationssymmetrischen Einlaufstörungen auf das Betriebsverhalten von hochbelasteten Axialventilatoren.
Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen, Heft 3, März 1996, S. 1-105, Dissertation, TU Braunschweig 1996, Verlag und Bildarchiv W. H. Faragallah.

Rösener, J.:
Untersuchungen zur Auslegung von hochbelasteten Axialventilatoren mit radial ungleichmäßiger Energieübertragung.
Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen, Heft 3, März 1996, S. 107-235, Dissertation TU Braunschweig 1996, Verlag und Bildarchiv W. H. Faragallah.

Rösener, J.; Kosyna, G.:
Experimentelle Untersuchungen an hochbelasteten Axialventilatoren mit radial ungleichmäßiger Energieübertragung.
VDI-Berichte , "Ventilatoren im industriellen Einsatz III", 1996, Bd. 1249, S. 469-485, VDI-Verlag, Düsseldorf.

Baumgarten, S.; Kosyna, G.:
Untersuchungen zur Strömung im Leitrad hochbelasteter Axialventilatoren.
VDI-Berichte, "Ventilatoren im industriellen Einsatz III", 1996, Bd. 1249, S. 487-505 VDI-Verlag, Düsseldorf.

1995

Lünzmann, H.:
Einfluß des Spaltstroms bei Spiralgehäusepumpen mit glattem Kegelspalt und Bauchschaufeln. Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen, Heft 2, Jan. 1995, S. 19-183 Dissertation, TU Braunschweig 1994, Verlag und Bildarchiv W. H. Faragallah

Kosyna, G.; Schmidt, T.; Wulff, D.; Spohnholtz, H.-H.:
NPSH R of Mixed-Flow-Pumps at Part-Load Operating Conditions. International Symposium on CAV'95 2.-5. Mai 1995 Deauville/France, S. 15-21 Hrsg.: DCN Bassin d'Essais des Carènes, France.

Kosyna, G.; Spohnholtz, H.-H.:
Teillast-Spitze im NPSH 3% -Verlauf. Delta-p November 1995, Ausgabe 4, 1. Jahrgang, S. 31-35, Ingenieur Verlag Nagel, Aichtal.

1994

Kenull, T; Wulff, D.:
Messungen und Kavitationsbeobachtungen an rotierenden Kreiselpumpenlaufrädern - Stand der Meßtechik am Pfleiderer-Institut.
Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen Heft 1, Sept. 1994, S. 139-146, Verlag und Bildarchiv W. H. Faragallah

Schmidt, T.; Spohnholtz, H.-H.; Kosyna, G.:
Ein Beitrag zur Wechselwirkung von Kavitation und Teillast-Strömungsphänomenen.
Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen Heft 1, Sept. 1994, S. 119-130, Verlag und Bildarchiv W.H. Faragallah.

Dreiß, A.:
Über die Wirkung von Laufschaufel-Entlastungsschlitzen zur Verbesserung des Kavitationsverhaltens von Kreiselpumpen.
Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen Heft 1, Sept. 1994, S. 161-172 Verlag und Bildarchiv W. H. Faragallah.

Kosyna, G.:
Aktuelle Fragen aus der Kreiselpumpentechnik - eine Nachlese der Pumpentagung 1992.
Pumpen, Kompressoren, Vakuumpumpen 1993, S. 24-28 Hrsg.: VDMA, Frankfurt/M.

Krasmann, H.; Kosyna, G.:
Einfluß stationärer nichtrotationssymmetrischer Einlaufstörungen auf die Nachlaufgrößen aerodynamisch hochbelasteter Axialventilatoren.
VDI-Berichte Nr. 1109, 1994, S. 345-362 VDI-Verlag, Düsseldorf.

Baumgarten, S.; Krasmann, H.; Rösener, J.:
Stand der Forschung an aerodynamisch hochbelasteten Axialventilatoren am Pfleiderer-Institut.
Mitteilungen des Pfleiderer-Instituts für Strömungsmaschinen Heft1, Sept. 1994, S. 147-160, Verlag und Bildarchiv W. H. Faragallah.

Kosyna, G.; Krasmann, H.:
Auswirkungen von Störungen in der Zuströmung auf das Betriebsverhalten aerodynamisch hochbelasteter Axialventilatoren.
Handbuch Ventilatoren, 1994, S. 236-255 Vulkan-Verlag, Essen.

1993

Lünzmann, H.; Kosyna, G.:
Erforschung der Verfahrensparameter und Ermittlung von Korrekturfaktoren für Pipeline-Kreiselpumpen beim Fördern von Mineralien mit erhöhter Viskosität. DGMK-Forschungsbericht 479, Feb. 1993 Hrsg.: DGMK, Hamburg.

Lünzmann, H.; Kosyna, G.:
Wirkungsweise und Einsatzmöglichkeiten reibungsvermindernder Additive beim Transport von Mineralölen in Pipelines -Literaturstudie.
DGMK-Forschungsbericht 489, Feb. 1993 Hrsg.: DGMK, Hamburg.

1992

Brodersen, S.; Wulff, D.:
Measurements of the Pressure and Velocity Distribution in Low-Speed Turbomachinery by Means on High-Frequency Pressure Transducers.
Transaction of the ASME/Vol. 114, January 1992, S. 100-107, Hrsg.: ASME

Kosyna, G.; Lünzmann, H.:
Experimental investigations on the Influence of leakage flow in centrifugal pumps with diagonal clearance gap.
I Mech E, Int. Conference on Power Station Pumps and Fans London, May 1992 C 439/010, S. 65-82 Hrsg.: I Mech E.

Lünzmann, H.; Kosyna, G.:
Bauchschaufeln - Möglichkeit zur Redukion schädlicher Auswirkungen von Dichtspaltverschleiß an Kreiselpumpen.
Pumpentagung Karlsruhe, 6.-8. Oktober 1992, Sektion B4 Kavitation, S. 2-11 + Bilder Hrsg.: VDMA, Frankfurt/M.

Thamsen, P.-U.:
Experimentelle Untersuchungen über die Auswirkungen von Zuströmstörungen auf das Betriebsverhalten von Tiefbrunnenpumpen.
Dissertation, TU Braunschweig 1992.

Kosyna, G.; Krasmann, H.:
Störungen in der Zuströmung von aerodynamisch hochbelasteten Axialventilatoren.
HLH Bd. 43 (1992) Nr. 8 - August, S. 450-453, Springer-VDI-Verlag.

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