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Scaling of the Aeroacoustics of High-Speed Trains

Lauterbach, Andreas and Loose, Sigfried and Ehrenfried, Klaus (2013) Scaling of the Aeroacoustics of High-Speed Trains. In: New Results in Numerical Experimental Fluid Mechanics VIII Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 121. Springer Verlag, Heidelberg New York Dordrecht London. pp. 731-738. ISBN 978-3-642-35679-7. ISSN 1612-2909

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Official URL: http://link.springer.com/chapter/10.1007/978-3-642-35680-3_87

Abstract

The present study focuses on the scaling of aeroacoustic sound sources of a high-speed train. To cover a wide Reynolds number range the experimental investigations are carried out with a 1:25 Inter City Express 3 model by measuring in two wind tunnels by means of microphone array technique. The facilities are the Aeroacoustic Wind tunnel (AWB) of the German Aerospace Center (DLR) in Brunswick, which provides nearly perfect acoustical conditions, and in the Cryogenic wind tunnel (DNW-KKK) of the DNW (German - Dutch wind tunnels) in Cologne, which allows measurements at higher Reynolds numbers. Two sources of sound with different characteristics are identified at Reynolds numbers up to Re = 0.46 mio. The aeroacoustic noise from the bogie section is dominant for frequencies f < 5 kHz and can be characterised by cavity mode excitation. The pantograph is the dominant source of sound above f = 5 kHz with a Aeolian tone characteristic. Additionally aeroacoustic measurements at higher Reynolds numbers of up to 3.70 mio have been conducted in the DNW-KKK. By cooling down one can increase the Reynolds number, and besides, this wind tunnel admits to vary the Mach and Reynolds numbers independently. Drawback of this facility is that it is not optimised for aeroacoustic experiments and reflexions as well as the high background noise level can disturb the results. These measurements revealed only a weak Reynolds number dependence of the noise source generated at the first bogie.

Item URL in elib:https://elib.dlr.de/66280/
Document Type:Contribution to a Collection
Additional Information:Online ISBN: 978-3-642-35680-3
Title:Scaling of the Aeroacoustics of High-Speed Trains
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lauterbach, Andreasandreas.lauterbach (at) dlr.deUNSPECIFIED
Loose, SigfriedSigfried.Loose (at) dlr.deUNSPECIFIED
Ehrenfried, Klausklaus.ehrenfried (at) dlr.deUNSPECIFIED
Date:2013
Journal or Publication Title:New Results in Numerical Experimental Fluid Mechanics VIII
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:121
DOI :10.1007/978-3-642-35680-3_87
Page Range:pp. 731-738
Editors:
EditorsEmail
Dillmann, AndreasDLR
Heller, GerdAirbus Deutschland, Bremen, Germany
Kreplin, Hans-PeterDLR
Nitsche, WolfgangTU Berlin, Berlin, Germany
Peltzer, InkenBeechcraft Berlin aviation GmbH, Schönefeld, Germany
Publisher:Springer Verlag, Heidelberg New York Dordrecht London
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
ISSN:1612-2909
ISBN:978-3-642-35679-7
Status:Published
Keywords:high speed train, beamforming, wind tunnel, aeroacoustic scaling, Reynolds number, Strouhal number,
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Projekt Next Generation Train (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Lauterbach, Andreas
Deposited On:19 Feb 2013 14:55
Last Modified:31 Jul 2019 19:29

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