时速100公里级地铁车辆通过隧道时引起的活塞风仿真研究
朴荣焕,张继业,李田
(西南交通大学 牵引动力国家重点实验室,四川 成都 610031)
摘要:地铁车辆通过隧道时,会诱导隧道内气体流动,对隧道内通风、基础设备运行以及人员安全造成安全隐患。为确保隧道内设备正常运行与人员安全,针对地铁车通过隧道时引起的气体流动进行研究。本文使用仿真计算的方法,基于滑动网络技术数值模拟某一地铁车辆通过隧道的动态过程,监测地铁车辆通过隧道时引起的隧道内气体流动。结果表明:隧道内活塞风纵向分量和总流量变化基本一致,隧道内的活塞风主要是纵向流;距离车体或地面越远,列车风流速最大值越小;车底与车顶处活塞风沿垂向距离降低缓慢,车体中部活塞风流速沿垂向迅速降低;隧道内活塞风流速最大值出现在距离入口750 m处。
关键词:地铁车辆;隧道滑流;压力波
中图分类号:U270.2 文献标志码:A doi:10.3969/j.issn.1006-0316.2021.11.006
文章编号:1006-0316 (2021) 11-0041-08
Simulation Study on Piston wind Caused by 100 km/h Metro Vehicles Passing through Tunnels
PIAO Ronghuan,ZHANG Jiye,LI Tian
( State Key Laboratory of traction power, Southwest Jiaotong University, Chengdu 610031, China )
Abstract:Metro vehicles passing through the tunnel induce the air flow, which will cause hidden danger to the ventilation in the tunnel, the operation of equipment and the safety of personnel. In order to eliminate these hidden dangers, this paper carries out a simulation study on the air flow caused by metro vehicles passing through the tunnel. The dynamic process is simulated by using the sliding mesh technology, and the airflow is monitored. The results show that the longitudinal component of piston wind in tunnel is consistent with the total flow, and the piston wind in tunnel is mainly longitudinal flow. The farther away from the car body or the ground, the smaller the maximum value of train air flow velocity. The piston wind at the vehicle bottom and roof decreases slowly along the vertical distance, but decreases rapidly in the middle of the car body. The maximum value of piston air flow velocity in the tunnel appears at 750 m away from the tunnel mouth.
Key words:metro vehicles;tunnel slipstream;pressure wave
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收稿日期:2021-04-12
基金项目:国家重点研发计划(2016YFB1200403);国家自然科学基金(51605397)
作者简介:朴荣焕(1996-),男,内蒙古呼伦贝尔扎兰屯市人,硕士研究生,主要研究方向为列车空气动力学与耦合动力学,E-mail:piaoronghuan@126.com。*通讯作者:张继业(1965-),男,四川夹江人,博士,教授,主要研究方向为高速列车空气动力学,E-mail:jyzhang@swjtu.edu.cn。
 

 

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