Staff View: Aerodynamics characteristics around simplified high speed train model under the effect of crosswinds

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...

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Main Authors:	Mohd. Salleh, Sufiah, Mat Ali, Mohamed Sukri, Shaikh Salim, Sheikh Ahmad Zaki, Ishak, Izuan Amin, Shirakashi, Masataka, Muhammad, Sallehuddin
Format:	Conference or Workshop Item
Published:	2015
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.utm.my/id/eprint/63395/ https://conferencealerts.com/show-event?id=147618
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id	my.utm.63395
record_format	eprints
spelling	my.utm.633952017-05-30T03:11:48Z http://eprints.utm.my/id/eprint/63395/ 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, Izuan Amin Shirakashi, Masataka Muhammad, Sallehuddin TJ Mechanical engineering and machinery 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 Reynolds-Averaged Navier Stokes (URANS) equation combined with k-? 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. 2015 Conference or Workshop Item PeerReviewed Mohd. Salleh, Sufiah and Mat Ali, Mohamed Sukri and Shaikh Salim, Sheikh Ahmad Zaki and Ishak, Izuan Amin and Shirakashi, Masataka and Muhammad, Sallehuddin (2015) Aerodynamics characteristics around simplified high speed train model under the effect of crosswinds. In: The International Conference on Computational Fluid Dynamics in Research and Industry 2015, 17-19 August, 2015, Kuala Lumpur, Malaysia. https://conferencealerts.com/show-event?id=147618
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Mohd. Salleh, Sufiah Mat Ali, Mohamed Sukri Shaikh Salim, Sheikh Ahmad Zaki Ishak, Izuan Amin Shirakashi, Masataka Muhammad, Sallehuddin Aerodynamics characteristics around simplified high speed train model under the effect of crosswinds
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 Reynolds-Averaged Navier Stokes (URANS) equation combined with k-? 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.
format	Conference or Workshop Item
author	Mohd. Salleh, Sufiah Mat Ali, Mohamed Sukri Shaikh Salim, Sheikh Ahmad Zaki Ishak, Izuan Amin Shirakashi, Masataka Muhammad, Sallehuddin
author_facet	Mohd. Salleh, Sufiah Mat Ali, Mohamed Sukri Shaikh Salim, Sheikh Ahmad Zaki Ishak, Izuan Amin Shirakashi, Masataka Muhammad, Sallehuddin
author_sort	Mohd. Salleh, Sufiah
title	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_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_sort	aerodynamics characteristics around simplified high speed train model under the effect of crosswinds
publishDate	2015
url	http://eprints.utm.my/id/eprint/63395/ https://conferencealerts.com/show-event?id=147618
_version_	1643655703955505152
score	13.211869

Aerodynamics characteristics around simplified high speed train model under the effect of crosswinds

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