Aerodynamic influences of bogie's geometric complexity on high-speed trains under crosswind

Zijian Guo; Tanghong Liu; Zhengwei Chen; Yutao Xia; Wenhui Li; Li Li

doi:10.1016/j.jweia.2019.104053

Aerodynamic influences of bogie's geometric complexity on high-speed trains under crosswind

Zijian Guo, Tanghong Liu, Zhengwei Chen, Yutao Xia, Wenhui Li, Li Li

Research output: Journal article publication › Journal article › Academic research › peer-review

68 Citations (Scopus)

Abstract

The geometries of bogies have a significant influence on the aerodynamic performances of high-speed trains (HSTs) in crosswinds, especially for wind tunnel tests. The delayed detached-eddy simulation (DDES) method was used to calculate the aerodynamic characteristics of 1/8th scaled HST models with differently simplified bogies under crosswinds. The numerical results were verified by wind tunnel tests using a same model. It was proven that the complexity of bogies has a significant influence on the HST models’ aerodynamic drag and rolling moment at various yaw angles. The flow field of the HST models under a 30° crosswind was then employed to study the effects of the bogies. With the simplification of the bogie structure, the positive and negative pressure in bogie cabins increased while that on the top surface seldom changed. Various flow patterns were found on the windward side and top surface of bogie cabins. The differences of the flow fields underneath the train models were quantitatively analyzed using the vertical velocity profiles near each bogie.

Original language	English
Article number	104053
Journal	Journal of Wind Engineering and Industrial Aerodynamics
Volume	196
DOIs	https://doi.org/10.1016/j.jweia.2019.104053
Publication status	Published - Jan 2020
Externally published	Yes

Keywords

Aerodynamic characteristics
Bogie simplification
Crosswind
DDES
High-speed train
Numerical simulation

ASJC Scopus subject areas

Civil and Structural Engineering
Renewable Energy, Sustainability and the Environment
Mechanical Engineering

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10.1016/j.jweia.2019.104053

Cite this

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title = "Aerodynamic influences of bogie's geometric complexity on high-speed trains under crosswind",

abstract = "The geometries of bogies have a significant influence on the aerodynamic performances of high-speed trains (HSTs) in crosswinds, especially for wind tunnel tests. The delayed detached-eddy simulation (DDES) method was used to calculate the aerodynamic characteristics of 1/8th scaled HST models with differently simplified bogies under crosswinds. The numerical results were verified by wind tunnel tests using a same model. It was proven that the complexity of bogies has a significant influence on the HST models{\textquoteright} aerodynamic drag and rolling moment at various yaw angles. The flow field of the HST models under a 30° crosswind was then employed to study the effects of the bogies. With the simplification of the bogie structure, the positive and negative pressure in bogie cabins increased while that on the top surface seldom changed. Various flow patterns were found on the windward side and top surface of bogie cabins. The differences of the flow fields underneath the train models were quantitatively analyzed using the vertical velocity profiles near each bogie.",

keywords = "Aerodynamic characteristics, Bogie simplification, Crosswind, DDES, High-speed train, Numerical simulation",

author = "Zijian Guo and Tanghong Liu and Zhengwei Chen and Yutao Xia and Wenhui Li and Li Li",

note = "Funding Information: This work was supported by the National Key Research and Development Plan [grant number 2016YFB1200504]. The authors acknowledge the computing resources provided by the High-Speed Train Research Centre of Central South University, China. Funding Information: This work was supported by the National Key Research and Development Plan [grant number 2016YFB1200504 ]. The authors acknowledge the computing resources provided by the High-Speed Train Research Centre of Central South University, China. Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

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language = "English",

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AU - Li, Wenhui

AU - Li, Li

N1 - Funding Information: This work was supported by the National Key Research and Development Plan [grant number 2016YFB1200504]. The authors acknowledge the computing resources provided by the High-Speed Train Research Centre of Central South University, China. Funding Information: This work was supported by the National Key Research and Development Plan [grant number 2016YFB1200504 ]. The authors acknowledge the computing resources provided by the High-Speed Train Research Centre of Central South University, China. Publisher Copyright: © 2019 Elsevier Ltd

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N2 - The geometries of bogies have a significant influence on the aerodynamic performances of high-speed trains (HSTs) in crosswinds, especially for wind tunnel tests. The delayed detached-eddy simulation (DDES) method was used to calculate the aerodynamic characteristics of 1/8th scaled HST models with differently simplified bogies under crosswinds. The numerical results were verified by wind tunnel tests using a same model. It was proven that the complexity of bogies has a significant influence on the HST models’ aerodynamic drag and rolling moment at various yaw angles. The flow field of the HST models under a 30° crosswind was then employed to study the effects of the bogies. With the simplification of the bogie structure, the positive and negative pressure in bogie cabins increased while that on the top surface seldom changed. Various flow patterns were found on the windward side and top surface of bogie cabins. The differences of the flow fields underneath the train models were quantitatively analyzed using the vertical velocity profiles near each bogie.

AB - The geometries of bogies have a significant influence on the aerodynamic performances of high-speed trains (HSTs) in crosswinds, especially for wind tunnel tests. The delayed detached-eddy simulation (DDES) method was used to calculate the aerodynamic characteristics of 1/8th scaled HST models with differently simplified bogies under crosswinds. The numerical results were verified by wind tunnel tests using a same model. It was proven that the complexity of bogies has a significant influence on the HST models’ aerodynamic drag and rolling moment at various yaw angles. The flow field of the HST models under a 30° crosswind was then employed to study the effects of the bogies. With the simplification of the bogie structure, the positive and negative pressure in bogie cabins increased while that on the top surface seldom changed. Various flow patterns were found on the windward side and top surface of bogie cabins. The differences of the flow fields underneath the train models were quantitatively analyzed using the vertical velocity profiles near each bogie.

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Aerodynamic influences of bogie's geometric complexity on high-speed trains under crosswind

Abstract

Keywords

ASJC Scopus subject areas

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