Multi-Scale Simulation of Aeroacoustic Turbulent Flows over Porous Surfaces
|Principal Investigator(s)||Prof. Dr.-Ing. habil. Manfred Krafczyk|
The study of aerodynamic flows generating noise pollution is very important for many classes of applications, one being flows around aeroplanes during landing and take-off. The central hypothesis of the present project is that noise generated by such high-Reynolds-number flows around moving or rigid structures, can be significantly reduced through permeable (porous) materials partially covering specific areas of the wings and tail units or of the jet engines. The main research objective of the project is, thus, to gain detailed insight into the aero-acoustics and the dynamics of turbulent flows inside and around porous surfaces, with the aim to increase the aerodynamic efficiency of planes and to decrease the acoustic pollution. This project proposes direct numerical simulations (DNS) of flows in porous media coupled to large-eddy simulations (LES) in the near-wall region of the boundary layer. In order to analyze the behaviour of different porous materials, the acoustic far field is computed by a standard CFD solver based on a RANS model of turbulence. This will be coupled to a DNS-LES solver based on a Lattice Boltzmann method. In order to reflect the coupled physics at all disparate scales involved, it is necessary to conduct a series of multi-billion-DOF simulations. To that end, It is crucial to find optimal HPC platforms and utilize them most effectively, whereby the variety of massively parallel platforms and the accompanying support provided by DEISA are indispensable.