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  4. Particle image velocimetry of the undercarriage flow of downscaled train models in a water-towing tank for the assessment of ballast flight
 
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Particle image velocimetry of the undercarriage flow of downscaled train models in a water-towing tank for the assessment of ballast flight

Citation Link: https://doi.org/10.15480/882.1353
Publikationstyp
Doctoral Thesis
Date Issued
2017
Sprache
English
Author(s)
Jönsson, Mattias  
Advisor
Rung, Thomas  orcid-logo
Referee
Raffel, Markus  
Herwig, Heinz  
Schmitz, Gerhard  
Title Granting Institution
Technische Universität Hamburg
Place of Title Granting Institution
Hamburg
Examination Date
2016-06-20
Institut
Fluiddynamik und Schiffstheorie M-8  
TORE-DOI
10.15480/882.1353
TORE-URI
http://tubdok.tub.tuhh.de/handle/11420/1356
Publisher
Verlag Dr. Hut GmbH
In this thesis the issue of ballast flight for high-speed trains is closely examined using (a) two-component high-speed particle image velocimetry of the undercarriage flow beneath 1:50 high-speed train models in a water-towing tank and (b) simplified momentum calculations regarding the path of motion of a dislodged trackbed ballast particle. The horizontal and vertical velocity components in the vertical plane extending between the trackbed and the train undercarriage in the trackbed line of symmetry were measured for three different train and three different ground configurations. The measured undercarriage flow fields were applied to an exposed, simplified and virtual ballast particle in the trackbed to simulate its dislodgement, its transport over the trackbed and its flight path.
Subjects
trains
aerodynamics
ballast flight
PIV
water-towing tank
downscaled train models
DDC Class
600: Technik
Lizenz
http://rightsstatements.org/vocab/InC/1.0/
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