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Aeroacoustics of a high-speed train double model at high Reynolds numbers

Lauterbach, Andreas and Ehrenfried, Klaus and Loose, Sigfried and Wagner, Claus (2012) Aeroacoustics of a high-speed train double model at high Reynolds numbers. Civil-Comp Press and Saxe-Coburg Publications. Railways 2012: The First International Conference on Railway Technology: Research, Development and Maintenance, 18.-20. Apr. 2012, Las Palmas de Gran Canaria, Spanien. DOI: 10.4203/ccp.98.190 ISBN 978-1-905088-52-2 CD-ROM ISSN 1759-3433

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Official URL: http://www.civil-comp.com/

Abstract

The here presented wind tunnel study focuses on the Reynolds- and Mach number dependence on the aeroacoustic noise emitted by the first bogie of the 1 : 25 scaled model of the Next Generation Train. The knowledge of the aeroacoustic scaling is essential for the correct interpretation of measurements with down-scaled models. For the sound source analysis the microphone array technique is applied. To achieve comparable aerodynamic conditions, the Reynolds number realised with the scaled model must be similar to the one obtained for the full-scale train. Therefore, cryogenic wind tunnel measurements were conducted for which the Reynolds number was increased by cooling the fluid. In addition, this facility admits to vary the Mach- and Reynolds numbers independently, which is very valuable to gain insight into the aeroacoustic scaling, without changing the scale of the model. A double-model setup is used, which provides a realistic underfloor flow. The analysis of the acoustic spectra reveal strong tonal components, which are sensitive to variations of the Mach - and Reynolds number.

Item URL in elib:https://elib.dlr.de/74055/
Document Type:Conference or Workshop Item (Speech, Paper)
Additional Information:ISBN: 978-1-901088-51-5 Book, ISBN: 978-1-905088-53-9 Set, CCP: 98 Abstracts
Title:Aeroacoustics of a high-speed train double model at high Reynolds numbers
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lauterbach, Andreasandreas.lauterbach (at) dlr.deUNSPECIFIED
Ehrenfried, Klausklaus.ehrenfried (at) dlr.deUNSPECIFIED
Loose, SigfriedSigfried.Loose (at) dlr.deUNSPECIFIED
Wagner, ClausClaus.Wagner (at) dlr.deUNSPECIFIED
Date:2012
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:Procee
DOI :10.4203/ccp.98.190
Editors:
EditorsEmail
Pombo, J.UNSPECIFIED
Publisher:Civil-Comp Press and Saxe-Coburg Publications
Series Name:Civil-Comp Proceedings: 98
ISSN:1759-3433
ISBN:978-1-905088-52-2 CD-ROM
Status:Published
Keywords:High-speed train, aerodynamics, aeroacoustics, cryogenic wind tunnel, high Reynolds number, acoustic camera, microphone array, laser-Doppler anemometry.
Event Title:Railways 2012: The First International Conference on Railway Technology: Research, Development and Maintenance
Event Location:Las Palmas de Gran Canaria, Spanien
Event Type:international Conference
Event Dates:18.-20. Apr. 2012
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 - Next Generation Train (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Lauterbach, Andreas
Deposited On:02 May 2012 14:36
Last Modified:12 Dec 2013 21:33

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