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The Current Understanding of the Spectral Broadening Effect by Turbulent Shear Layers

Kröber, Stefan and Hellmold, Marius and Koop, Lars (2013) The Current Understanding of the Spectral Broadening Effect by Turbulent Shear Layers. AIA-DAGA 2013 Conference on Acoustic, 18. - 21. March 2013, Merano, Italy.

Full text not available from this repository.

Official URL: http://www.aia-daga.eu

Abstract

In aeroacoustic open jet wind tunnel testing the sound propagation through the turbulent wind tunnel shear layers is accompanied by several effects which may distort the original signal. One of these effects is the so-called “spectral broadening”. This phenomenon results in a reallocation of acoustic energy of the sound wave into other frequencies. In case of a tonal sound source this effect leads to difficulties in the interpretation of aeroacoustic measurement results and can also lead to uncertainties by the determination of absolute levels. In the context of aeroacoustic measurements of counter rotating open rotors and propellers these issues become more and more important.

Item URL in elib:https://elib.dlr.de/78365/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:The Current Understanding of the Spectral Broadening Effect by Turbulent Shear Layers
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kröber, StefanUNSPECIFIEDUNSPECIFIED
Hellmold, MariusUNSPECIFIEDUNSPECIFIED
Koop, LarsUNSPECIFIEDUNSPECIFIED
Date:2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1918-1921
Series Name:Conference Proceedings on CD-ROM
Status:Published
Keywords:Spectral Broadening, Turbulent Shear Layers, Wind tunnel, Microphone array
Event Title:AIA-DAGA 2013 Conference on Acoustic
Event Location:Merano, Italy
Event Type:international Conference
Event Dates:18. - 21. March 2013
Organizer:Deutsche Gesellschaft für Akustik e.V.
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Micknaus, Ilka
Deposited On:15 Jul 2013 15:45
Last Modified:15 Jul 2013 15:45

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