Ewert, R. and Zhang, Q. and Schröder, W. and Delfs, J.W. (2003) Computation of Trailing Edge Noise of a 3D Lifting Airfoil in Turbulent Subsonic Flow. 9th AIAA/CEAS Aeroacoustics Conference, Hilton Head (usa), 12.-14.05.2003.
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A hybrid method is applied to predict trailing edge noise based on a Large Eddy Simulation (LES) of the compressible flow problem in the immediate acoustic source region and acoustic perturbation equations (APE) for the simulation of the acoustic radiation problem in space and time. The mean flow convection and refraction effects are part of the simulation of wave propagation such that the computational domain of the flow simulation in general has to comprise only the significant acoustic source region. Using linearized acoustic perturbation equations the unbounded growth of hydrodynamic instabilities in critical mean flows is prevented completely. The acoustic problem is solved in two dimensions. A correction method is proposed that adapts the sound pressure levels to that of a wing with finite wing span.
|Document Type:||Conference or Workshop Item (Paper)|
|Title:||Computation of Trailing Edge Noise of a 3D Lifting Airfoil in Turbulent Subsonic Flow|
|Keywords:||Airframe Noise, Trailing Edge, LES, APE|
|Event Title:||9th AIAA/CEAS Aeroacoustics Conference, Hilton Head (usa), 12.-14.05.2003|
|HGF - Research field:||Aeronautics, Space and Transport (old)|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L VU - Air Traffic and Environment (old)|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L VU - Air Traffic and Environment|
|DLR - Research theme (Project):||L - Quiet Air Traffic (old)|
|Location:||Köln-Porz , Braunschweig , Göttingen|
|Institutes and Institutions:||Institute of Aerodynamics and Flow Technology|
|Deposited By:||Claudia Grant|
|Deposited On:||31 Jan 2006|
|Last Modified:||14 Jan 2010 19:28|
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