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Microphone array measurements on high-speed trains in wind tunnels

Lauterbach, Andreas and Klaus, Ehrenfried and Kröber, Stefan and Ahlefeldt, Thomas and Loose, Sigfried (2010) Microphone array measurements on high-speed trains in wind tunnels. Berlin Beamforming Conference BeBeC2010, 24.-25. Feb. 2010, Berlin, Germany. ISBN 978-3-00-030027-1.

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Official URL: http://www.bebec2010.com

Abstract

The present study evaluates the capabilities of the phased microphone array technique for the localisation and quantification of aeroacoustic sound sources of high speed trains in wind tunnels. The major challenge is to obtain a sufficient resolution of the sources with low source strength. The experiments were carried out using 1:25 models in the Aeroacoustic Wind Tunnel Brunswick (AWB) of the German Aerospace Center (DLR). This Göttingen – type wind tunnel has an open test section which is surrounded by an anechoic chamber. The microphone array consists of 143 microphones and is positioned outside the flow. In order to achieve reasonable results a shear layer correction is applied. Performing a phase-calibration can increase the signal-to-noise ratio, especially for higher frequencies. This procedure will be presented als well.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Microphone array measurements on high-speed trains in wind tunnels
Authors:
AuthorsInstitution or Email of Authors
Lauterbach, AndreasUNSPECIFIED
Klaus, EhrenfriedUNSPECIFIED
Kröber, StefanUNSPECIFIED
Ahlefeldt, ThomasUNSPECIFIED
Loose, SigfriedUNSPECIFIED
Date:2010
Page Range:pp. 1-12
Series Name:Conference Proceedings
ISBN:978-3-00-030027-1
Status:Published
Keywords:Beamforming, microphone array, phased array, high-speed train, aerodynamic, aeroacoustic, cavity noise, Strouhal number, Verkehr, Lärm
Event Title:Berlin Beamforming Conference BeBeC2010
Event Location:Berlin, Germany
Event Type:international Conference
Event Dates:24.-25. Feb. 2010
Organizer:GFal, DLR und TU-Berlin
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Next Generation Train (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Helicopters
Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Andreas Lauterbach
Deposited On:02 Mar 2010 13:29
Last Modified:02 Mar 2010 13:29

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