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SFB880: Principles of High Lift in Future Commercial Aircraft

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Spokesman: Prof. Dr. –Ing. Rolf Radespiel

Detailed information on the program can be found on the SFB880 homepage.

Aim of the program

The main aim of the collaborative research centre SFB 880, which was established in 2011, is to improve the efficiency of active high lift in future commercial aircraft. Summarized under the general heading “Principles of High Lift for Future Commercial Aircraft”, the SFB 880 analyses different active high lift systems. Special focus of the research activities is on finding solutions concerning noise reduction and improved scalability of performance parameters during take-off and landing.

Furthermore by developing a new scope of low-noise airliners, the SFB880 aims at a better integration of air transportation into metropolitan regions. Realizing this vision requires generating new technologies based on knowledge concerning aeroacoustics, aerodynamics and flight dynamics, which reaches far beyond the current state of research and methodologies in these fields. The SFB 880 approaches this challenge by performing fundamental research in the areas just mentioned above.

Detailed information on the research activities of the SFB 880 can be found in the download section of the SFB 880 website.

Particular projects of the program:

The SFB 880 consists of four different particular areas (A, B, C and Z), which focus on different aspects of the SFB 880's overall research objective.

Subarea A: Aeroacoustic Basics

Abstract: Subarea A focuses on research concerning aeroacoustic principles dealing amongst others with the problem of the development of noise and its radiation from airplanes during flight. With attention turned to five different ranges, the goal is to find a solution for regulating the development of noise during flight by using porous surfaces. This ought to be achieved without reducing the aerodynamic performance of the aircraft.

Particular Projects:

A1: Airframe Noise Simulation for Porous Material

A3: Aerodynamic and Aeroacoustic Investigation of Embedded Engines

A4: Porous Materials

A5: DNS and LES for Porous Surfaces

A6: Origin and Prediction of Cabin Noise Due to Structure-borne Sound

A8: Scale Resolving Simulations of Aeroacoustic Sounds

Subarea B: Efficient High Lift

Abstract: Subarea B, in form of six particular projects, concentrates on research regarding efficient high lift. Here the exploratory focus is on avoiding pressure gradients for example by designing a leading edge of aircraft wings which is both persistent and variable in contour. Moreover the projects are dealing with the development of compact, dynamically adjustable however lightweight compressor systems. In addition they examine sensitivity of compressor inlets in turbo machinery.

Particular Projects:

B1: Conditioned Coanda Jets

B2: Adaptive Systems for Flow Control

B3: Flexible, Gap and Step-less Leading Edge Device

B4: Compact Dynamic Compressors for Active Flow Control

B5: RANS Model for Porous Surfaces

B6: Investigation of Intake and Propulsion System

Subarea C: Flight Dynamics

Abstract: Subarea C encompasses three partial projects dealing with flight dynamics. First of all, the projects concentrate on the question in which way modern high lift systems affect the dynamic performance of aircraft. Furthermore the major focus of the particular projects lies on the generation of flight mechanic models, longitudinal motion derivates, analysis of aerolastic behaviour as well as the effort of maintaining a low-rank representation through solving stochastic differential equations including uncertain coefficients.

Particular Projects:

C1: Dynamics of Lift Generation

C3: Structural Design and Aeroelasticity

C4: Uncertainties Quantification in Models for High-lift Simulations

Subarea Z: Aircraft Design and Technology Assessment

Subarea Z concentrates on multi disciplinary aircraft design as well as technology assessment. The main aim of the area is developing an integrated design methodology on the basis of PrADO, which, as a first step, is expanded by physical methods suitable for computational design. Referring to this, attention is primarily paid to the description of aerodynamics in decks provided with high lift flaps in combination with propeller interactions, thermodynamic modelling of propeller drive and representation of different systematical aspects of concepts traced by the SFB with the objective of implementing a circulation control. Moreover Subarea Z is responsible for the integration of the various subprojects findings, by providing the required information of aircraft configurations to other subprojects. Furthermore its task is to rate technologies with noise reduction and with efficient high-lift potential.

Junior Projects

The SFB 880 promotes innovative project ideas in the field "fundamentals of high-lift systems for future commercial aircraft", which have not yet been investigated within the SFB 880. In addition, the SFB 880 encourages young scientists towards scientific independence.

The three junior projects during the first funding period of the SFB 880:

  • Dr. Arne Vorreiter, LU Hannover (1): “Machbarkeitsstudie für einen einstufigen Tandem-Axialverdichter zur Versorgung eines aktiven Hochauftriebssystems.”
  • Dr. Thomas Feuerle, TU Braunschweig (2): “Konzept zur Beobachtung einer aktiven Abminderung von Wirbelschleppen hinter einem Flugzeug.”
  • Dr. Richard Semaan, TU Braunschweig (3): “Optimized sensor placement over a 2D airfoil with circulation control.”

The two junior projects so far for the second funding cycle:

  • Dr.-Ing. Malte Misol, DLR Braunschweig (4): “Beeinflussung der Schallabstrahlung von Gridpaneelen mit aktiv-passiv-hybriden (APH) Methoden.”
  • Dr. Noemi Friedman, TU Braunschweig (5): “Robustness, sensitivity analysis and identification of the reduced order model for Coanda blowing flow control for stochastic spectral methods.”

For detailed information on particular subareas of the SFB880 and its research activities you are welcome to visit the SFB880 homepage.


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