Numerical simulation of the aerodynamic characteristics of double unit train

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Numerical simulation of the aerodynamic characteristics of double unit train. / Guo, Zijian; Liu, Tanghong; Hemida, Hassan; Chen, Zhengwei; Liu, Hongkang.

In: Engineering Applications of Computational Fluid Mechanics, Vol. 14, No. 1, 02.07.2020, p. 910-922.

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Guo, Zijian ; Liu, Tanghong ; Hemida, Hassan ; Chen, Zhengwei ; Liu, Hongkang. / Numerical simulation of the aerodynamic characteristics of double unit train. In: Engineering Applications of Computational Fluid Mechanics. 2020 ; Vol. 14, No. 1. pp. 910-922.

Bibtex

@article{f50196a59a394fcdaa272afb1a0c8686,
title = "Numerical simulation of the aerodynamic characteristics of double unit train",
abstract = "Double unit trains running at high speeds may create additional aerodynamic challenges due to two streamlined structures with close proximity, exploring the aerodynamic performance of double unit trains is now critical. In this study, detached eddy simulation (DES) approach was employed to study the aerodynamic performance and the nearby flow patterns of a double unit train, whose results were compared and analyzed with that of a single-unit train with a same length. The results showed that the coupling method could change the aerodynamic drag on each car and tended to increase the overall drag of the double unit train. The lift force of the front car near the coupler was significantly increased. Similar slipstream distributions were found around the front half single and double-unit train except in a region close to the coupler. Due to the coupling structure, the slipstream of the rear half of double unit train was much stronger compared to single unit train. The vortex region behind the double-unit train was much wider than that of the single-unit train and was accompanied by greater vortex-shedding.",
keywords = "Aerodynamic force, detached eddy simulation (DES), double-unit train, drag component, numerical simulation, open air",
author = "Zijian Guo and Tanghong Liu and Hassan Hemida and Zhengwei Chen and Hongkang Liu",
note = "Funding Information: This work was supported by National Natural Science Foundation of China: [grant number 11902367]; Ministry of Science and Technology of the People's Republic of China: [grant number 2016YFB1200504]. Publisher Copyright: {\textcopyright} 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.",
year = "2020",
month = jul,
day = "2",
doi = "10.1080/19942060.2020.1784798",
language = "English",
volume = "14",
pages = "910--922",
journal = "Engineering Applications of Computational Fluid Mechanics",
issn = "1994-2060",
publisher = "Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University",
number = "1",

}

RIS

TY - JOUR

T1 - Numerical simulation of the aerodynamic characteristics of double unit train

AU - Guo, Zijian

AU - Liu, Tanghong

AU - Hemida, Hassan

AU - Chen, Zhengwei

AU - Liu, Hongkang

N1 - Funding Information: This work was supported by National Natural Science Foundation of China: [grant number 11902367]; Ministry of Science and Technology of the People's Republic of China: [grant number 2016YFB1200504]. Publisher Copyright: © 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

PY - 2020/7/2

Y1 - 2020/7/2

N2 - Double unit trains running at high speeds may create additional aerodynamic challenges due to two streamlined structures with close proximity, exploring the aerodynamic performance of double unit trains is now critical. In this study, detached eddy simulation (DES) approach was employed to study the aerodynamic performance and the nearby flow patterns of a double unit train, whose results were compared and analyzed with that of a single-unit train with a same length. The results showed that the coupling method could change the aerodynamic drag on each car and tended to increase the overall drag of the double unit train. The lift force of the front car near the coupler was significantly increased. Similar slipstream distributions were found around the front half single and double-unit train except in a region close to the coupler. Due to the coupling structure, the slipstream of the rear half of double unit train was much stronger compared to single unit train. The vortex region behind the double-unit train was much wider than that of the single-unit train and was accompanied by greater vortex-shedding.

AB - Double unit trains running at high speeds may create additional aerodynamic challenges due to two streamlined structures with close proximity, exploring the aerodynamic performance of double unit trains is now critical. In this study, detached eddy simulation (DES) approach was employed to study the aerodynamic performance and the nearby flow patterns of a double unit train, whose results were compared and analyzed with that of a single-unit train with a same length. The results showed that the coupling method could change the aerodynamic drag on each car and tended to increase the overall drag of the double unit train. The lift force of the front car near the coupler was significantly increased. Similar slipstream distributions were found around the front half single and double-unit train except in a region close to the coupler. Due to the coupling structure, the slipstream of the rear half of double unit train was much stronger compared to single unit train. The vortex region behind the double-unit train was much wider than that of the single-unit train and was accompanied by greater vortex-shedding.

KW - Aerodynamic force

KW - detached eddy simulation (DES)

KW - double-unit train

KW - drag component

KW - numerical simulation

KW - open air

UR - http://www.scopus.com/inward/record.url?scp=85087651822&partnerID=8YFLogxK

U2 - 10.1080/19942060.2020.1784798

DO - 10.1080/19942060.2020.1784798

M3 - Article

AN - SCOPUS:85087651822

VL - 14

SP - 910

EP - 922

JO - Engineering Applications of Computational Fluid Mechanics

JF - Engineering Applications of Computational Fluid Mechanics

SN - 1994-2060

IS - 1

ER -