elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Kontakt | English
Schriftgröße: [-] Text [+]

Microphone array wind tunnel measurements of Reynolds number effects of high-speed train aeroacoustics

Lauterbach, Andreas und Ehrenfried, Klaus und Loose, Sigfried und Wagner , Claus (2012) Microphone array wind tunnel measurements of Reynolds number effects of high-speed train aeroacoustics. International Journal of Aeroacoustics, 11 (3 - 4), Seiten 411-446. MULTI-SCIENCE PUBLISHING CO. LTD.. DOI: 10.1260/1475-472X.11.3-4.411. ISSN 1475-472X.

Dieses Archiv kann nicht den gesamten Text zur Verfügung stellen.

Offizielle URL: http://multi-science.metapress.com/content/n2832813771l/?p=701742fec55b46d7adc197b309ff273e&pi=0

Kurzfassung

The present study focuses on the Reynolds number dependence of high-speed train aeroacoustic sound sources. To cover a wide range of Reynolds numbers the experimental investigations are carried out on a 1:25 scaled model of the high speed train Inter City Express 3 by conducting microphone array measurements in two wind tunnels. The latter are the Aeroacoustic Wind tunnel (AWB) of the German Aerospace Center (DLR) in Brunswick, providing nearly perfect acoustical conditions, and the Cryogenic wind tunnel (DNW-KKK) of the DNW (German - Dutch wind tunnels) in Cologne, allowing measurements at higher Reynolds numbers. Two types of sound sources with different characteristics at Reynolds numbers of up to Re = 0.46 mio have been identified by measurements in the AWB. It was found, that the aeroacoustic noise from the bogie section is dominant for frequencies f < 5 kHz and can be characterized by cavity mode excitation. Further, the pantograph is the dominant sound source above f = 5 kHz with a Aeolian tone characteristic. Additional aeroacoustic measurements have been conducted in the cryogenic wind tunnel DNW-KKK in order to analyse the Reynolds number dependence of the the noise generated at the first bogie, for higher Reynolds numbers of up to Re = 3.70 mio. The DNW-KKK admits to vary the Mach and Reynolds numbers independently. These measurements reveal only a weak Reynolds number dependence of the noise source generated at the first bogie.

Dokumentart:Zeitschriftenbeitrag
Zusätzliche Informationen:Submitted: Aug 19, 2011; Revised: Mar 31, 2012; Accepted: April 16, 2012; Aerospace Science and Acoustics
Titel:Microphone array wind tunnel measurements of Reynolds number effects of high-speed train aeroacoustics
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Lauterbach, Andreasandreas.lauterbach@dlr.de
Ehrenfried, Klausklaus.ehrenfried@dlr.de
Loose, Sigfriedsigfried.loose@dlr.de
Wagner , Clausclaus.wagner@dlr.de
Datum:2012
Erschienen in:International Journal of Aeroacoustics
Referierte Publikation:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:11
DOI :10.1260/1475-472X.11.3-4.411
Seitenbereich:Seiten 411-446
Verlag:MULTI-SCIENCE PUBLISHING CO. LTD.
ISSN:1475-472X
Status:veröffentlicht
Stichwörter:Aeroacoustic, scaling, high-speed train, noise reduction, Reynolds number, Strouhal number, Helmholtz number, cavity, cryogenic wind tunnel, microphone array, beamforming
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Verkehr
HGF - Programmthema:Bodengebundener Verkehr
DLR - Schwerpunkt:Verkehr
DLR - Forschungsgebiet:V BF - Bodengebundene Fahrzeuge
DLR - Teilgebiet (Projekt, Vorhaben):V - Next Generation Train (alt)
Standort: Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Fluidsysteme
Hinterlegt von: Andreas Lauterbach
Hinterlegt am:20 Jul 2012 08:46
Letzte Änderung:26 Mär 2015 17:16

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Copyright © 2008-2013 Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.