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Numerical Investigation of Time-Dependent Cross-Wind Effects on an Idealised Leading Rail Car

Schiffer, Stefanie and Wagner, Claus (2012) Numerical Investigation of Time-Dependent Cross-Wind Effects on an Idealised Leading Rail Car. 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.98.164. ISBN 978-1-905088-52-2 CD-ROM. ISSN 1759-3433

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

Abstract

For the optimization of modern high-speed trains it is essential to fully understand the physics of the instantaneous and time-averaged flow around the train body. Hence for the study presented here large eddy simulations (LES) have been performed to investigate the flow around a simplified train model. For subgrid-scale modelling the Smagorinsky model in combination with van Driest damping were used. Simulations were conducted for a Reynolds number of 2 x 10^5, based on the free stream velocity and the train width. It is shown that the LES technique is capable of providing details of the instantaneous flow field which can not be predicted in Reynolds-averaged Navier-Stokes (RANS) simulations.

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:Numerical Investigation of Time-Dependent Cross-Wind Effects on an Idealised Leading Rail Car
Authors:
AuthorsInstitution or Email of Authors
Schiffer, StefanieUNSPECIFIED
Wagner, ClausUNSPECIFIED
Date:April 2012
Refereed publication:No
In ISI Web of Science:No
Volume:Procee
DOI:10.4203/ccp.98.164
Editors:
EditorsEmail
Pombo, Joãojpombo@dem.ist.utl.pt
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:large eddy simulation, train aerodynamics, wake structures, cross-wind, subgrid-scale model, bluff body
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
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: Stefanie Schiffer
Deposited On:02 May 2012 14:49
Last Modified:12 Dec 2013 21:33

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