TU BRAUNSCHWEIG

Junior Research Group Multiphysics of Turbulent Flows

The junior research group Multiphysics of Turbulent Flows is concerned with the influence of turbulence and transitional boundary layers on the aerodynamics of turbo machines. The work is focused on two major points: The investigation of the physics of turbulence using scale-resolving numerical methods as well as experimental data from TFD test rigs, and applying this knowledge to the development of physical RANS models for turbomachinery design. The current focus is set on active and passive methods to influence the transitional boundary layers of low-pressure turbines (LPT), the influence of isotropic and anisotropic surface roughness on turbulent boundary layers as well as the stabilizing influence of periodic wakes on high decelerating axial diffusers and LPT profiles.

Currently, turbomachinery flows are investigated using scale-resolving numerical methods. Among other things, cascades for low-pressure turbines with rough-structure simulations (LES) are being investigated in order to analyze the influence of a high-resolution boundary-layer flow on the profile load and on the profile outflow. The results are, for example, the illustrated lower-dimensional pressure distributions of the low-pressure turbine profile MTU-T161 at different inflow conditions. In addition, as shown in the picture on the right, simulated compressor profiles are simulated with scale-resolving methods. These blades are made to flutter to provide shovel-flutter insights using aeroelastic simulations for aeroelastic damping and aeroelastic work using scale-resolved aeroelastic simulations.


Figure 1: Schwarzbach et al. (2018)


Further research projects of the junior research groups is the subproject B3 "Loss Behavior of Complex Surface Structures" within the framework of the Collaborative Research Center 871. The objective of this work is the identification of the effects of the complex surface structures on the near wall flow. Together with the Institute of Multi Phase Processes a method to build surface structures by using hydrogel will developed. In combination with the particle image velocimetry, the measurement of the near wall flow at and between the surface structures is possible. Also the project "Evaluation of novel low-pressure turbine blades by means of scale-resolving simulations" within the framework of the 5th Aviation Research Program together with the MTU Aero Engines and the recently launched international joint project " ADVENTUS - Advanced Small Wind Turbines "within the German-Greek research funding of the BMBF are part of the group. Here a transfer of scale-dissolving simulation methods as well as derived models of aerodynamics and fluid-structure-interaction of aeroengine applications on wind turbines takes place.

Group Leader:
  • Dr.-Ing. Florian Herbst, Institute of Turbomachinery and Fluid Dynamics (TFD), Leibniz Universität Hannover
PhD Students:
  • Felix Schwarzbach, M. Sc., Institute of Turbomachinery and Fluid Dynamics (TFD), Leibniz Universität Hannover
  • Mark Zieße, M. Sc., Institute of Turbomachinery and Fluid Dynamics (TFD), Leibniz Universität Hannover
  • Phillip Gilge, Dipl.-Ing., Institute of Turbomachinery and Fluid Dynamics (TFD), Leibniz Universität Hannover
  • Lars Wein, Dipl.-Ing., Institute of Turbomachinery and Fluid Dynamics (TFD), Leibniz Universität Hannover
  • Dominik Fireling, M. Sc., Institute of Turbomachinery and Fluid Dynamics (TFD), Leibniz Universität Hannover
  • Matthias Schmid, M. Sc., Institute of Turbomachinery and Fluid Dynamics (TFD), Leibniz Universität Hannover
  • Dajan Mimic, M. Sc., Institute of Turbomachinery and Fluid Dynamics (TFD), Leibniz Universität Hannover
Academic Cooperation Partner
  • Institute of Jet propulsion and Turbomachinery (IFAS), TU Braunschweig
  • Institute for Multiphase Processes (IMP), Leibniz Universität Hannover
  1. Schwarzbach, F.; Müller-Schindewolffs, Chr.; Bode, Chr.; Herbst, F.: THE EFFECT OF TURBULENT SCALES ON LOW-PRESSURE TURBINE AERODYNAMICS PART B: SCALE RESOLVING SIMULATIONS. ASME 2018 Turbo Expo, angenommen, 2018.


Head of the Junior Research Group Multiphysics of Turbulent Flows

Leibniz Universität Hannover
Institute of Turbomachinery and Fluid Dynamics (TFD)
Appelstraße 9
D-30167 Hannover

Tel.: +49 511/762-17861
E-Mail: herbst@tfd.uni-hannover.de

  last changed 12.11.2018
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