Study on influence of strong crosswind on aerodynamic effects of a high-speed train entering a tunnel

被引：0
|
作者：
Wang L. [1 ,2 ]
Zhang C. [3 ]
Tan Z. [1 ]
Luo J. [1 ]
Li Y. [2 ]
机构：
[1] School of Civil Engineering, Beijing Jiaotong University, Beijing
[2] Beijing Subway Operation Co. Ltd., Beijing
[3] Beijing Subway Engineering Management Co. Ltd., Beijing
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2023年 / 54卷 / 11期
基金：
中国国家自然科学基金;
关键词：
aerodynamic pressure; crosswind; flow field; high-speed train(HST); train wind velocity; tunnel;
D O I：
10.11817/j.issn.1672-7207.2023.11.035
中图分类号：
学科分类号：
摘要：
In order to investigate the aerodynamic effects of a high-speed train(HST) entering a tunnel under strong crosswind, a 3D numerical model including tunnel, HST and crosswind was established based on the finite volume method theory, and the SST k - ω turbulence model was adopted for calculation. The distribution characteristics of the flow field around the train during the entry of the train with the crosswind were analyzed, the effects of the crosswind on the transient pressure and the train wind in the tunnel was explored. The results show that the variation amplitude of aerodynamic pressure of tunnel wall is the largest when the head and rear vehicle pass through the tunnel under crosswind, and the aerodynamic pressure at the tunnel entrance is the most affected by crosswind, and the aerodynamic pressure on the leeward side of the train is more significantly affected. Significant differences in the variation rules of windward and leeward side train wind exist when trains enter the tunnel. The train wind in windward side space decreases with the increase of the distance to the entrance, while the train wind in leeward side space has no significant relationship with the distance to the entrance. The influence range of crosswind on train wind in tunnel is limited, and the train wind at tunnel entrance is most affected by crosswind. When the crosswind speed is 30 m/s and the train speed is 350 km/h, the train wind variation law in the same side space of the train is basically the same after the distance from the entrance exceeds 50 m. The lateral flow field of the tunnel is offset to the leeward side of the train, and the initial position of the vortex structure on the leeward side is transferred from the head streamlined segment to the tunnel entrance, while the large-scale vortex structure on the windward side of the train in the tunnel is gradually offset to the windward side, and gradually decomposes and dissipates during the process of the train entering the tunnel. The characteristics of the flow field are significantly different from that in the case of no crosswind. © 2023 Central South University of Technology. All rights reserved.
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页码：4584 / 4595
页数：11
相关论文
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