Effect of crosswinds on aerodynamic characteristics around a generic train model

Ishak, I. A. and Mat Ali, Mohamed Sukri and Mohd Yakub, Mohamad Fitri and Shaikh Salim, Sheikh Ahmad Zaki (2019) Effect of crosswinds on aerodynamic characteristics around a generic train model. INTERNATIONAL JOURNAL OF RAIL TRANSPORTATION, 7 (1). pp. 23-54. ISSN 2324-8386

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Abstract

In this article, simulations of crosswinds over a rectangular prism with two types of train nose shapes (i.e. blunt and ellipse) that are running on flat ground case are discussed. The incident flow angle is varied from 0° to 90°. The flow around the train is solved using the incompressible form of the unsteady Reynolds Navier-Stokes (URANS) equations combined with the Shear-Stress-Transport k � ω turbulence model. The Reynolds number used, based on the height of the train is 3.7 × 105 . Two distinctive flow regimes appear which represent a slender body behaviour at a smaller range of incident flow angles (below 45°) and bluff body behaviour at a much higher range of incident flow angles (above 45°). The safety guidelines for train’s operation suggested that both the train’s nose geometry and the wind speed condition are the two major factors that limit the maximum allowable speed for a particular train to be travelling.

Item Type: Article
Uncontrolled Keywords: Aerodynamics; crosswind; generic train model; flow regime; OpenFOAM; SST k-ω turbulence mode
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TJ Mechanical engineering and machinery > TJ266-267.5 Turbines. Turbomachines (General)
Divisions: Faculty of Engineering Technology > Department of Mechnical Engineering Technology
Depositing User: UiTM Student Praktikal
Date Deposited: 03 Jan 2022 05:01
Last Modified: 03 Jan 2022 05:01
URI: http://eprints.uthm.edu.my/id/eprint/5000

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