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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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|
|Page Range:||pp. 1-12|
|Series Name:||Conference Proceedings|
|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|
|HGF - Program:||Transport|
|HGF - Program Themes:||V BF - Bodengebundene Fahrzeuge|
|DLR - Research area:||Transport|
|DLR - Program:||V BF - Bodengebundene Fahrzeuge|
|DLR - Research theme (Project):||V - Next Generation Train (old)|
|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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