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The use of Aeronautical Experimental Facilities and Measurement Techniques for the Aerodynamic Investigation of High Speed Trains

Dillmann, Andreas (2009) The use of Aeronautical Experimental Facilities and Measurement Techniques for the Aerodynamic Investigation of High Speed Trains. In: Lecture Notes in Applied and Computational Mechanics The Aerodynamics of Heavy Vehicles II: Trucks, Buses, and Trains, Vol. 41. Springer-Verlag Berlin Heidelberg. pp. 233-234. ISBN 978-3-540-85069-4.

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Official URL: http://www.springer.com

Abstract

The development of future high speed trains is driven by commercial and ecological requirements which determine the increase of speed and payload while reducing weight and improving thermal and acoustical passenger comfort. To ensure the same level of safeness then for today’s rolling stock, additional issues like Reynolds-Number and Mach-Number dependencies have to be explored. The influence of unsteady flow phenomena as well as the impact of the train’s induced flow field on humans and infrastructure has to be investigated. For this purpose, special experimental facilities and techniques originally developed for aeronautical research proved to be extremely useful. For the investigation of viscous flow effects like separation and other boundary layer phenomena, a pressurized wind tunnel can realize high Reynolds numbers without entering the compressible flow regime. Validated results for the Göttingen high pressure wind tunnel show that it is possible to use extremely small models, down to a scale of 1:100, and to get good results if the accuracy of the model manufacturing process is high enough. A second possibility to increase the Reynolds number in a wind tunnel is to cool down the working fluid, thus increasing the Reynolds number up to a factor of 5.5. The main advantage of cryogenic wind tunnels is the possibility of independent adjustment of the Mach and Reynolds number. A third possibility to increase the Reynolds number is to change the working fluid of the facility, e.g. by using water instead of air. Advanced measurement techniques, which were originally developed for aeronautical research, allow a deep insight into the physical mechanisms governing the aerodynamic performance of high speed trains. A broad variety of experimental results is presented, showing that high Reynolds number facilities are in many cases an indispensable research tool for the aerodynamics of railroad vehicles.

Item URL in elib:https://elib.dlr.de/82215/
Document Type:Contribution to a Collection
Additional Information:e-ISBN: 978-3-540-85070-0, e-ISSN 1860-0816, Library of Congress Control Number: 2008934051, Series Editors Prof. Dr.-Ing. Friedrich Pfeiffer Prof. Dr.-Ing. Peter Wriggers
Title:The use of Aeronautical Experimental Facilities and Measurement Techniques for the Aerodynamic Investigation of High Speed Trains
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Dillmann, AndreasUNSPECIFIEDUNSPECIFIED
Date:2009
Journal or Publication Title:Lecture Notes in Applied and Computational Mechanics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:Vol. 41
DOI :10.1007/978-3-540-85070-0_20
Page Range:pp. 233-234
Editors:
EditorsEmail
Browand, FredUniversity of Southern California, Department of Aerospace and Mechanical Engineering,Los Angeles, CA 90089-1191, USA
McCallen, RoseLawrence Livermore National Laboratory, Center for AdvancedFluid Dynamics Applications (CAFDA), L-098Livermore CA 94551, USA
Ross, JamesNASA Ames Research Center, Experimental Physics Branch, MS 260-1, Moffett Field CA 94035, USA
Publisher:Springer-Verlag Berlin Heidelberg
Series Name:The Aerodynamics of Heavy Vehicles II: Trucks, Buses, and Trains
ISBN:978-3-540-85069-4
Status:Published
Keywords:High Speed Trains, Aeronautical Experimental Facilities, boundary layer
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 > Leitungsbereich AS GO
Deposited By: Micknaus, Ilka
Deposited On:13 May 2013 17:00
Last Modified:13 May 2013 17:00

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