Full-scale tests of unsteady aerodynamic loads and pressure distribution on fast trains in crosswinds

Hongrui Gao; Tanghong Liu; Houyu Gu; Zhiwei Jiang; Xiaoshuai Huo; Yutao Xia; Zhengwei Chen

doi:10.1016/j.measurement.2021.110152

Full-scale tests of unsteady aerodynamic loads and pressure distribution on fast trains in crosswinds

Hongrui Gao, Tanghong Liu, Houyu Gu, Zhiwei Jiang, Xiaoshuai Huo, Yutao Xia, Zhengwei Chen

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

47 Citations (Scopus)

Abstract

Unsteady aerodynamic loads have a significant influence on the running safety of a train in crosswinds. Full-scale tests were carried out to measure the pressure on a fast streamlined train in crosswinds, and the unsteady aerodynamic loads were obtained by the discrete integration of the pressure to assess the influence of different crosswinds on the loads. The maximum wind speed was 34.0 m/s in the full-scale tests, and the maximum turbulence intensity was 0.202. The means and fluctuations of the side force coefficient, lift coefficient, and rolling moment coefficient around the lee rail at different yaw angles were studied. The means first increased and then decreased with the increase in the yaw angle, and the maximum values occurred in the range of 54.5°–59.6°. The coefficients of variation of the aerodynamic load coefficients were approximately twice the turbulence intensity, which indicated that the fluctuations of the aerodynamic load coefficients were due to the oscillations of the wind speed. For the frequency characteristics of the aerodynamic load coefficients, the most dominant frequencies were at Strouhal numbers of 0–0.4.

Original language	English
Article number	110152
Journal	Measurement: Journal of the International Measurement Confederation
Volume	186
DOIs	https://doi.org/10.1016/j.measurement.2021.110152
Publication status	Published - Dec 2021
Externally published	Yes

Keywords

Aerodynamic load coefficients
Crosswinds
Full-scale tests
Trains

ASJC Scopus subject areas

Instrumentation
Electrical and Electronic Engineering

More information

10.1016/j.measurement.2021.110152

Cite this

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title = "Full-scale tests of unsteady aerodynamic loads and pressure distribution on fast trains in crosswinds",

abstract = "Unsteady aerodynamic loads have a significant influence on the running safety of a train in crosswinds. Full-scale tests were carried out to measure the pressure on a fast streamlined train in crosswinds, and the unsteady aerodynamic loads were obtained by the discrete integration of the pressure to assess the influence of different crosswinds on the loads. The maximum wind speed was 34.0 m/s in the full-scale tests, and the maximum turbulence intensity was 0.202. The means and fluctuations of the side force coefficient, lift coefficient, and rolling moment coefficient around the lee rail at different yaw angles were studied. The means first increased and then decreased with the increase in the yaw angle, and the maximum values occurred in the range of 54.5°–59.6°. The coefficients of variation of the aerodynamic load coefficients were approximately twice the turbulence intensity, which indicated that the fluctuations of the aerodynamic load coefficients were due to the oscillations of the wind speed. For the frequency characteristics of the aerodynamic load coefficients, the most dominant frequencies were at Strouhal numbers of 0–0.4.",

keywords = "Aerodynamic load coefficients, Crosswinds, Full-scale tests, Trains",

author = "Hongrui Gao and Tanghong Liu and Houyu Gu and Zhiwei Jiang and Xiaoshuai Huo and Yutao Xia and Zhengwei Chen",

note = "Funding Information: This work was carried out in part using computing resources at the High Performance Computing Center of Central South University. This work was supported by the National Natural Science Foundation of China [Grant numbers U1334205, U1534210]. Funding Information: This work was carried out in part using computing resources at the High Performance Computing Center of Central South University. This work was supported by the National Natural Science Foundation of China [Grant numbers U1334205 , U1534210 ]. Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

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language = "English",

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journal = "Measurement: Journal of the International Measurement Confederation",

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AU - Gao, Hongrui

AU - Liu, Tanghong

AU - Gu, Houyu

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AU - Huo, Xiaoshuai

AU - Xia, Yutao

AU - Chen, Zhengwei

N1 - Funding Information: This work was carried out in part using computing resources at the High Performance Computing Center of Central South University. This work was supported by the National Natural Science Foundation of China [Grant numbers U1334205, U1534210]. Funding Information: This work was carried out in part using computing resources at the High Performance Computing Center of Central South University. This work was supported by the National Natural Science Foundation of China [Grant numbers U1334205 , U1534210 ]. Publisher Copyright: © 2021 Elsevier Ltd

PY - 2021/12

Y1 - 2021/12

N2 - Unsteady aerodynamic loads have a significant influence on the running safety of a train in crosswinds. Full-scale tests were carried out to measure the pressure on a fast streamlined train in crosswinds, and the unsteady aerodynamic loads were obtained by the discrete integration of the pressure to assess the influence of different crosswinds on the loads. The maximum wind speed was 34.0 m/s in the full-scale tests, and the maximum turbulence intensity was 0.202. The means and fluctuations of the side force coefficient, lift coefficient, and rolling moment coefficient around the lee rail at different yaw angles were studied. The means first increased and then decreased with the increase in the yaw angle, and the maximum values occurred in the range of 54.5°–59.6°. The coefficients of variation of the aerodynamic load coefficients were approximately twice the turbulence intensity, which indicated that the fluctuations of the aerodynamic load coefficients were due to the oscillations of the wind speed. For the frequency characteristics of the aerodynamic load coefficients, the most dominant frequencies were at Strouhal numbers of 0–0.4.

AB - Unsteady aerodynamic loads have a significant influence on the running safety of a train in crosswinds. Full-scale tests were carried out to measure the pressure on a fast streamlined train in crosswinds, and the unsteady aerodynamic loads were obtained by the discrete integration of the pressure to assess the influence of different crosswinds on the loads. The maximum wind speed was 34.0 m/s in the full-scale tests, and the maximum turbulence intensity was 0.202. The means and fluctuations of the side force coefficient, lift coefficient, and rolling moment coefficient around the lee rail at different yaw angles were studied. The means first increased and then decreased with the increase in the yaw angle, and the maximum values occurred in the range of 54.5°–59.6°. The coefficients of variation of the aerodynamic load coefficients were approximately twice the turbulence intensity, which indicated that the fluctuations of the aerodynamic load coefficients were due to the oscillations of the wind speed. For the frequency characteristics of the aerodynamic load coefficients, the most dominant frequencies were at Strouhal numbers of 0–0.4.

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Full-scale tests of unsteady aerodynamic loads and pressure distribution on fast trains in crosswinds

Abstract

Keywords

ASJC Scopus subject areas

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