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Effect of crosswinds on aerodynamic characteristics around a generic train model

Ishak, Izuan Amin 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 2324-8378

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Official URL: http://dx.doi.org/10.1080/23248378.2018.1424573

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, flow regime, generic train model
Subjects:T Technology > T Technology (General)
Divisions:Malaysia-Japan International Institute of Technology
ID Code:89412
Deposited By: Yanti Mohd Shah
Deposited On:22 Feb 2021 14:04
Last Modified:22 Feb 2021 14:04

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