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Validation of DLR's sound shielding prediction tool using a novel sound source

Rossignol, Karl-Stéphane and Lummer, Markus and Delfs, Jan (2009) Validation of DLR's sound shielding prediction tool using a novel sound source. 15th AIAA/CEAS Aeroacoustics Conference, 2009-05-11 - 2009-05-13, Miami, FL (USA).

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Abstract

This paper is concerned with an experimental validation methodology for DLR’s acoustic shielding prediction boundary element and raytracing codes BEMPAR and SHADOW respectively. These codes in turn will be integrated into the overall aircraft noise prediction tool PANAM of DLR. The presented validation concept is based on a novel laser-based sound source. Almost perfect monopole-type test signals may be produced with a frequency content up to roughly 100kHz in combination with a very small source extension. These characteristics make this technique especially attractive for shielding/installation tests, which typically have to be performed at relativey small scale. BEMPAR is a boundary element code (BEM) which solves for the scattered pressure field. Three generic test cases are evaluated, a circular plate, a long cylinder and DLR’s low noise aircraft (LNA-1) nacelle model. The outcome of this investigation clearly demonstrate the potential of BEMPAR for the prediction of installation effects.

Item URL in elib:https://elib.dlr.de/58268/
Document Type:Conference or Workshop Item (Paper)
Title:Validation of DLR's sound shielding prediction tool using a novel sound source
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Rossignol, Karl-StéphaneUNSPECIFIEDUNSPECIFIED
Lummer, MarkusUNSPECIFIEDUNSPECIFIED
Delfs, JanUNSPECIFIEDUNSPECIFIED
Date:2009
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Accepted
Keywords:Sound source, Sound shielding, Experimental techniques, Aeroacoustics testing
Event Title:15th AIAA/CEAS Aeroacoustics Conference
Event Location:Miami, FL (USA)
Event Type:international Conference
Event Dates:2009-05-11 - 2009-05-13
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: Rossignol, Karl-Stephane
Deposited On:12 Mar 2009
Last Modified:31 Jul 2019 19:24

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