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Computation of Trailing Edge Noise of a 3D Lifting Airfoil in Turbulent Subsonic Flow

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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Abstract

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)
Additional Information: LIDO-Berichtsjahr=2004,
Title:Computation of Trailing Edge Noise of a 3D Lifting Airfoil in Turbulent Subsonic Flow
Authors:
AuthorsInstitution or Email of Authors
Ewert, R.UNSPECIFIED
Zhang, Q.UNSPECIFIED
Schröder, W.UNSPECIFIED
Delfs, J.W.UNSPECIFIED
Date:2003
Status:Published
Keywords:Airframe Noise, Trailing Edge, LES, APE
Event Title:9th AIAA/CEAS Aeroacoustics Conference, Hilton Head (usa), 12.-14.05.2003
Organizer:AIAA
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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