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Application of a Discontinuous Galerkin Method to Predict Airframe Noise

Bauer, Marcus and Dierke, Jürgen and Ewert, Roland (2009) Application of a Discontinuous Galerkin Method to Predict Airframe Noise. 15th AIAA/CEAS Aeroacoustics Conference (30th AIAA Aeroacoustics Conference), 11.-13. Mai 2009, Miami, Florida, USA.

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Abstract

Unstructured grids greatly ease the mesh generation process in the case of complex geometries. The Discontinuous Galerkin Method (DGM) provides a robust, high-order accurate discretization even on this type of grid. The goal of the work reported herein is the prediction of broadband airframe noise generated by an airfoil with a deployed slat. Focus is on the noise generated by the slat, and two spatial dimensions are considered as a first step. The particularly employed DGM employs Lagrange polynomials as shape functions. They enable a simple and cheap truncation of the flux quantities of the underlying Acoustic Perturbation Equations (APE). The method is tested by computing the sound field of a monopole placed in a laminar boundary layer. Computations are stable, and very good agreement with other computations and with theoretical results is observed. Considering the prediction of broadband slat noise, the turbulent source term of the APE is computed efficiently via the stochastic FRPM (Fast Random Particle Mesh) method. Very encouraging results are obtained, and these will be analyzed in the next step.

Item URL in elib:https://elib.dlr.de/73908/
Document Type:Conference or Workshop Item (Paper)
Additional Information:AIAA-Paper 2009-3175
Title:Application of a Discontinuous Galerkin Method to Predict Airframe Noise
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bauer, Marcusmarcus.bauer (at) dlr.deUNSPECIFIED
Dierke, Jürgenjuergen.dierke (at) dlr.deUNSPECIFIED
Ewert, Rolandroland.ewert (at) dlr.deUNSPECIFIED
Date:May 2009
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Discontinuous Galerkin Method Airframe Noise
Event Title:15th AIAA/CEAS Aeroacoustics Conference (30th AIAA Aeroacoustics Conference)
Event Location:Miami, Florida, USA
Event Type:Conference
Event Dates:11.-13. Mai 2009
Organizer:AIAA/CEAS
HGF - Research field:Aeronautics, Space and Transport
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: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: Bauer, Marcus
Deposited On:16 Jan 2012 10:05
Last Modified:31 Jul 2019 19:34

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