Aerodynamics characteristics around simplified high speed train model under the effect of crosswinds
The aerodynamics problems of train commonly come when the flow pass through train body. The increasing speed of train to achieve highly technology demands has led to increase the forces and moments and increase sensitivity of train stability and may cause the train to overturn. In this paper, two pr...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Asian Research Publishing Network (ARPN)
2017
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| Online Access: | http://eprints.uthm.edu.my/5005/ http://eprints.uthm.edu.my/5005/1/AJ%202018%20%28811%29%20Aerodynamics%20characteristics%20around%20simplified%20high%20speed%20train%20model%20under%20the%20effect%20of%20crosswinds.pdf |
| _version_ | 1848888437999927296 |
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| author | Mohd Salleh, Sufiah Mat Ali, Mohamed Sukri Shaikh Salim, Sheikh Ahmad Zaki Ishak, I. A. Shirakashi, Masataka Muhammad, Sallehuddin |
| author_facet | Mohd Salleh, Sufiah Mat Ali, Mohamed Sukri Shaikh Salim, Sheikh Ahmad Zaki Ishak, I. A. Shirakashi, Masataka Muhammad, Sallehuddin |
| author_sort | Mohd Salleh, Sufiah |
| building | UTHM Institutional Repository |
| collection | Online Access |
| description | The aerodynamics problems of train commonly come when the flow pass through train body. The increasing speed of train to achieve highly technology demands has led to increase the forces and moments and increase sensitivity of train stability and may cause the train to overturn. In this paper, two prisms arranged in tandem represent a simplified model of high speed train are performed at different yaw angle ranging from 0˚ to 90˚ by using the unsteady ReynoldsAveraged Navier Stokes (URANS) equation combined with k-ω SST turbulence model. The Reynolds number is 3.14x105 based on height of the train and the free stream velocity. The aerodynamic quantities such as the side force, lift force and drag force coefficient show a similar trend where the forces increase with the yaw angle until a certain critical yaw angle before start to decrease till the yaw angle of 90˚. The flow structure around the train under the effect of crosswind is visualized. The vorticiticy start to form from the nose and slowly drifts away further towards the trailing edge. The two-dimensional mean streamlines on the cross-section of train at different yaw angle show that the size of vortex increase as the yaw angle increase. Time averaged pressure contour plotted on the cross section along x-axis show the variation of region between high pressure and low pressure region on the leeward and windward side of the train model that may cause train to overturn. |
| first_indexed | 2025-11-15T20:10:17Z |
| format | Article |
| id | uthm-5005 |
| institution | Universiti Tun Hussein Onn Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T20:10:17Z |
| publishDate | 2017 |
| publisher | Asian Research Publishing Network (ARPN) |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | uthm-50052022-01-03T05:09:39Z http://eprints.uthm.edu.my/5005/ Aerodynamics characteristics around simplified high speed train model under the effect of crosswinds Mohd Salleh, Sufiah Mat Ali, Mohamed Sukri Shaikh Salim, Sheikh Ahmad Zaki Ishak, I. A. Shirakashi, Masataka Muhammad, Sallehuddin TJ Mechanical engineering and machinery TJ170-179 Mechanics applied to machinery. Dynamics The aerodynamics problems of train commonly come when the flow pass through train body. The increasing speed of train to achieve highly technology demands has led to increase the forces and moments and increase sensitivity of train stability and may cause the train to overturn. In this paper, two prisms arranged in tandem represent a simplified model of high speed train are performed at different yaw angle ranging from 0˚ to 90˚ by using the unsteady ReynoldsAveraged Navier Stokes (URANS) equation combined with k-ω SST turbulence model. The Reynolds number is 3.14x105 based on height of the train and the free stream velocity. The aerodynamic quantities such as the side force, lift force and drag force coefficient show a similar trend where the forces increase with the yaw angle until a certain critical yaw angle before start to decrease till the yaw angle of 90˚. The flow structure around the train under the effect of crosswind is visualized. The vorticiticy start to form from the nose and slowly drifts away further towards the trailing edge. The two-dimensional mean streamlines on the cross-section of train at different yaw angle show that the size of vortex increase as the yaw angle increase. Time averaged pressure contour plotted on the cross section along x-axis show the variation of region between high pressure and low pressure region on the leeward and windward side of the train model that may cause train to overturn. Asian Research Publishing Network (ARPN) 2017 Article PeerReviewed text en http://eprints.uthm.edu.my/5005/1/AJ%202018%20%28811%29%20Aerodynamics%20characteristics%20around%20simplified%20high%20speed%20train%20model%20under%20the%20effect%20of%20crosswinds.pdf Mohd Salleh, Sufiah and Mat Ali, Mohamed Sukri and Shaikh Salim, Sheikh Ahmad Zaki and Ishak, I. A. and Shirakashi, Masataka and Muhammad, Sallehuddin (2017) Aerodynamics characteristics around simplified high speed train model under the effect of crosswinds. ARPN Journal of Engineering and Applied Sciences, 12 (8). pp. 2604-2609. ISSN 1819-6608 |
| spellingShingle | TJ Mechanical engineering and machinery TJ170-179 Mechanics applied to machinery. Dynamics Mohd Salleh, Sufiah Mat Ali, Mohamed Sukri Shaikh Salim, Sheikh Ahmad Zaki Ishak, I. A. Shirakashi, Masataka Muhammad, Sallehuddin Aerodynamics characteristics around simplified high speed train model under the effect of crosswinds |
| title | Aerodynamics characteristics around simplified high speed train model under the effect of crosswinds |
| title_full | Aerodynamics characteristics around simplified high speed train model under the effect of crosswinds |
| title_fullStr | Aerodynamics characteristics around simplified high speed train model under the effect of crosswinds |
| title_full_unstemmed | Aerodynamics characteristics around simplified high speed train model under the effect of crosswinds |
| title_short | Aerodynamics characteristics around simplified high speed train model under the effect of crosswinds |
| title_sort | aerodynamics characteristics around simplified high speed train model under the effect of crosswinds |
| topic | TJ Mechanical engineering and machinery TJ170-179 Mechanics applied to machinery. Dynamics |
| url | http://eprints.uthm.edu.my/5005/ http://eprints.uthm.edu.my/5005/1/AJ%202018%20%28811%29%20Aerodynamics%20characteristics%20around%20simplified%20high%20speed%20train%20model%20under%20the%20effect%20of%20crosswinds.pdf |