Influence of Nose-slenderness Ratio on Air Pressure Pulse of High-speed Trains Passing Each Other

The strength of side windows, the stability of train operation, and the comfort of passengers will be affected by air pressure fluctuations when the high-speed train meets. Based on the three-dimensional, compressible, and unsteady two-equation turbulence model, the moving grid technique and the fin...

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Autores principales:	Lin Ma, Zihao Xie, Weiyu Chen, ZhenfengWu
Formato:	article
Lenguaje:	EN
Publicado:	Tamkang University Press 2021
Materias:	train crossing numerical simulation high-speed train aerodynamic performance Engineering (General). Civil engineering (General) TA1-2040 Chemical engineering TP155-156 Physics QC1-999
Acceso en línea:	https://doaj.org/article/15532c83ad864028ae0f0655a2e89e9e
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id	oai:doaj.org-article:15532c83ad864028ae0f0655a2e89e9e
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spelling	oai:doaj.org-article:15532c83ad864028ae0f0655a2e89e9e2021-11-23T18:12:34ZInfluence of Nose-slenderness Ratio on Air Pressure Pulse of High-speed Trains Passing Each Other10.6180/jase.202204_25(2).00162708-99672708-9975https://doaj.org/article/15532c83ad864028ae0f0655a2e89e9e2021-11-01T00:00:00Zhttp://jase.tku.edu.tw/articles/jase-202204-25-2-0016https://doaj.org/toc/2708-9967https://doaj.org/toc/2708-9975The strength of side windows, the stability of train operation, and the comfort of passengers will be affected by air pressure fluctuations when the high-speed train meets. Based on the three-dimensional, compressible, and unsteady two-equation turbulence model, the moving grid technique and the finite volume method were applied to simulate the high-speed train meeting in the open air with nose-slenderness ratios of λL1=3.43, λL2=5.01, λL3=6.59 respectively, and the pressure curves of seven monitoring points near the side window of the train are obtained. The results show that when trains with different slenderness ratios meet at the same speed, the train with a smaller nose-slenderness ratio will suffer greater aerodynamic impact. When the three trains with different slenderness ratios meet at the same speed with the same observing train, the train with a larger nose-slenderness ratio has a smaller amplitude of the head pressure wave and the tail pressure wave, while the train with a smaller nose-slenderness ratio has a larger amplitude of the two kinds of the pressure wave. The reduction rate range of head pressure wave amplitude is 16.0-43.3% and that of the tail one is 13.5-32.1%. It can be seen that the air pressure pulse amplitude of trains crossing in the open air can be reduced by increasing the nose-slenderness ratio of the train.Lin MaZihao XieWeiyu ChenZhenfengWuTamkang University Pressarticletrain crossingnumerical simulationhigh-speed trainaerodynamic performanceEngineering (General). Civil engineering (General)TA1-2040Chemical engineeringTP155-156PhysicsQC1-999ENJournal of Applied Science and Engineering, Vol 25, Iss 2, Pp 307-319 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	train crossing numerical simulation high-speed train aerodynamic performance Engineering (General). Civil engineering (General) TA1-2040 Chemical engineering TP155-156 Physics QC1-999
spellingShingle	train crossing numerical simulation high-speed train aerodynamic performance Engineering (General). Civil engineering (General) TA1-2040 Chemical engineering TP155-156 Physics QC1-999 Lin Ma Zihao Xie Weiyu Chen ZhenfengWu Influence of Nose-slenderness Ratio on Air Pressure Pulse of High-speed Trains Passing Each Other
description	The strength of side windows, the stability of train operation, and the comfort of passengers will be affected by air pressure fluctuations when the high-speed train meets. Based on the three-dimensional, compressible, and unsteady two-equation turbulence model, the moving grid technique and the finite volume method were applied to simulate the high-speed train meeting in the open air with nose-slenderness ratios of λL1=3.43, λL2=5.01, λL3=6.59 respectively, and the pressure curves of seven monitoring points near the side window of the train are obtained. The results show that when trains with different slenderness ratios meet at the same speed, the train with a smaller nose-slenderness ratio will suffer greater aerodynamic impact. When the three trains with different slenderness ratios meet at the same speed with the same observing train, the train with a larger nose-slenderness ratio has a smaller amplitude of the head pressure wave and the tail pressure wave, while the train with a smaller nose-slenderness ratio has a larger amplitude of the two kinds of the pressure wave. The reduction rate range of head pressure wave amplitude is 16.0-43.3% and that of the tail one is 13.5-32.1%. It can be seen that the air pressure pulse amplitude of trains crossing in the open air can be reduced by increasing the nose-slenderness ratio of the train.
format	article
author	Lin Ma Zihao Xie Weiyu Chen ZhenfengWu
author_facet	Lin Ma Zihao Xie Weiyu Chen ZhenfengWu
author_sort	Lin Ma
title	Influence of Nose-slenderness Ratio on Air Pressure Pulse of High-speed Trains Passing Each Other
title_short	Influence of Nose-slenderness Ratio on Air Pressure Pulse of High-speed Trains Passing Each Other
title_full	Influence of Nose-slenderness Ratio on Air Pressure Pulse of High-speed Trains Passing Each Other
title_fullStr	Influence of Nose-slenderness Ratio on Air Pressure Pulse of High-speed Trains Passing Each Other
title_full_unstemmed	Influence of Nose-slenderness Ratio on Air Pressure Pulse of High-speed Trains Passing Each Other
title_sort	influence of nose-slenderness ratio on air pressure pulse of high-speed trains passing each other
publisher	Tamkang University Press
publishDate	2021
url	https://doaj.org/article/15532c83ad864028ae0f0655a2e89e9e
work_keys_str_mv	AT linma influenceofnoseslendernessratioonairpressurepulseofhighspeedtrainspassingeachother AT zihaoxie influenceofnoseslendernessratioonairpressurepulseofhighspeedtrainspassingeachother AT weiyuchen influenceofnoseslendernessratioonairpressurepulseofhighspeedtrainspassingeachother AT zhenfengwu influenceofnoseslendernessratioonairpressurepulseofhighspeedtrainspassingeachother
_version_	1718416137663807488

Influence of Nose-slenderness Ratio on Air Pressure Pulse of High-speed Trains Passing Each Other

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