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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AJ 2018 (809) Effect of crosswinds on aerodynamic characteristics around a generic train model.pdf Restricted to Registered users only Download (5MB) | Request a copy |
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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