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Underfloor Flow Measurements of 1:50 Generic High Speed Train Configurations for Different Ground Conditions in a Water Towing Tank

Jönsson, Mattias and Wagner, Claus and Loose, Sigfried (2014) Underfloor Flow Measurements of 1:50 Generic High Speed Train Configurations for Different Ground Conditions in a Water Towing Tank. International Journal of Railway Technology, 1 (4), pp. 85-113. Saxe-Coburg. DOI: 10.4203/ijrt.1.4.5 ISSN 2049-5358

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Official URL: http://www.saxe-coburg.co.uk

Abstract

Two-component high-speed particle image velocimetry of the underfloor flow of three different 1:50 generic high-speed train models hauled through a water towing tank over a smooth, a rough and a ground with sleepers at a speed of 4 m/s (Re = 0.25 Mio) were conducted. It was found that any additional irregularities at the underbody increase the velocities, the velocity fluctuations and the velocity gradients at the ground which increases the chance of ballast flight. Therefore, it is concluded that a smooth underbody can lower the risk of ballast flight. The results were compared to full-scale measurements. The main characteristics of the underfloor flow are captured in the water towing tank for downscaled train models.

Item URL in elib:https://elib.dlr.de/76185/
Document Type:Article
Title:Underfloor Flow Measurements of 1:50 Generic High Speed Train Configurations for Different Ground Conditions in a Water Towing Tank
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Jönsson, MattiasMattias.Joensson (at) dlr.deUNSPECIFIED
Wagner, ClausClaus.Wagner (at) dlr.deUNSPECIFIED
Loose, SigfriedSigfried.Loose (at) dlr.deUNSPECIFIED
Date:2014
Journal or Publication Title:International Journal of Railway Technology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:1
DOI :10.4203/ijrt.1.4.5
Page Range:pp. 85-113
Editors:
EditorsEmail
Pombo, Joaoccmm@civil-comp.com
Publisher:Saxe-Coburg
ISSN:2049-5358
Status:Published
Keywords:Underfloor aerodynamics, ballast flight, ballast projection, high-speed trains, train aerodynamics, vehicle aerodynamics, particle image velocimetry
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 - Project Next Generation Train II (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Jönsson, Mattias
Deposited On:24 Apr 2014 15:04
Last Modified:06 Sep 2019 15:30

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