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Investigation of Reynolds Number Effects in High-Speed Train Wind Tunnel Testing using Temperature-Sensitive Paint

Fey, Uwe and Klein, Christian and Ondrus, Vladimir and Loose, Sigfried and Wagner, Claus (2013) Investigation of Reynolds Number Effects in High-Speed Train Wind Tunnel Testing using Temperature-Sensitive Paint. IFV Bahntechnik e.V., Salzufer 17-19 / SG20, 10587 Berlin. 2nd International Symposium on RAIL-AERODYNAMICS 2013, 16. - 17. May 2013, Berlin, Germany. ISBN 978-3-940727-37-4.

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The method of Temperature-Sensitive Paint (TSP) is used to visualize wall shear-stress patterns of high-speed train models subject to crosswind in the Göttingen cross-wind facility SWG and the kryo wind tunnel Cologne (KKK). An ICE3- and a NGT2-model (Next Generation Train) is investigated with respect to laminar-turbulent boundary layer transition, separation lines and vortex signatures on the leeward side of the train's nose. It is shown, that in low-speed wind tunnel testing as given in SWG and KKK (Re range: 0.3 Mio < Re < 1 Mio for a 1:25 train model) laminar regions exist, which are not to be expected on a real train. Thus, laminar-turbulent transition occurs and the extend of laminar regions or appearance of separation bubbles is dependant on Reynolds number, yaw angle, body shape and sharpness of edges. The influence of these Reynolds number effects on the results of force measurements in different wind tunnels and/or for different Reynolds numbers in one and the same wind tunnel is discussed.

Item URL in elib:https://elib.dlr.de/81248/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Investigation of Reynolds Number Effects in High-Speed Train Wind Tunnel Testing using Temperature-Sensitive Paint
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Ondrus, VladimirUni HohenheimUNSPECIFIED
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Volume:Vol. 44/2013
Page Range:pp. 29-47
Publisher:IFV Bahntechnik e.V., Salzufer 17-19 / SG20, 10587 Berlin
Series Name:Conference Proceedings
Keywords:Next Generation Train, Temperature-Sensitive Paint (TSP), high-speed train, laminar-turbulent transition
Event Title:2nd International Symposium on RAIL-AERODYNAMICS 2013
Event Location:Berlin, Germany
Event Type:international Conference
Event Dates:16. - 17. May 2013
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 > Experimental Methods
Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Micknaus, Ilka
Deposited On:29 May 2013 13:07
Last Modified:29 May 2013 13:07

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