亚音速真空管道列车气动壅塞及激波现象

doi:10.3901/JME.2021.04.182

机械工程学报 ›› 2021, Vol. 57 ›› Issue (4): 182-190.doi: 10.3901/JME.2021.04.182

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亚音速真空管道列车气动壅塞及激波现象

张晓涵, 李田, 张继业, 张卫华

西南交通大学牵引动力国家重点实验室成都 610031

收稿日期:2020-03-20 修回日期:2020-05-27 出版日期:2021-02-20 发布日期:2021-04-28
通讯作者: 李田(通信作者),男,1984年出生,博士后,副研究员,硕士研究生导师。主要研究方向为列车空气动力学,流动控制与应用。E-mail:litian2008@swjtu.edu.cn
作者简介:张晓涵,男,1996年出生。主要研究方向为列车空气动力学。E-mail:zxh15895952927@my.swjtu.edu.cn;张继业,男,1965年出生,博士,教授,博士研究生导师。主要研究方向为列车空气动力学,稳定性理论与应用。E-mail:jyzhang@home.swjtu.edu.cn;张卫华,男,1961年出生,博士,教授,博士研究生导师。主要研究方向为高速列车耦合大系统动力学。E-mail:tpl@home.swjtu.edu.cn
基金资助:
四川省科技计划（2019YJ0227）、中国博士后科学基金（2019M663550）和牵引动力国家重点实验室自主课题（2019TPL_T02）资助项目。

Aerodynamic Choked Flow and Shock Wave Phenomena of Subsonic Evacuated Tube Train

ZHANG Xiaohan, LI Tian, ZHANG Jiye, ZHANG Weihua

State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031

Received:2020-03-20 Revised:2020-05-27 Online:2021-02-20 Published:2021-04-28

摘要/Abstract

摘要： 真空管道列车运行环境变化复杂，研究管道内部气动现象对真空管道列车设计及优化等具有重要意义。利用收敛-扩张进气道理论阐明亚音速真空管道列车壅塞机制。建立考虑悬浮高度的二维亚音速真空管道列车数值模型，利用重叠网格技术研究了真空管道列车运行前方的气动壅塞现象与尾部的激波现象。结果表明：重叠网格技术适用于数值模拟真空管道列车气动特性。管道内列车前方的壅塞高压区域长度随着运行速度的增加而降低，随着运行时间的增加而增大，且壅塞高压区长度与列车运行速度和时间均呈线性关系。列车尾部区域存在膨胀波和激波，尾部激波长度随着运行速度的增加而增加。由于悬浮间隙的存在，列车尾部激波呈现上下不对称现象。通过理论和仿真计算相结合方法揭示真空管道列车运行前方气动壅塞现象产生机制，得到了列车后方的非对称尾部激波现象。

关键词: 真空管道列车, 壅塞流, 激波, 亚音速列车, 重叠网格技术

Abstract: Due to the complex operating environment of evacuated tube trains, it is of great significance to study the aerodynamic phenomena in the tube for the design and optimization of the evacuated tube train. Based on the theory of convergent-divergent intake, the choked flow in the evacuated tube is explained under the subsonic condition. A two-dimensional numerical model of a subsonic evacuated tube train is established with a suspension height, and the phenomena of choked flow in front of the running train in an evacuated tube and shock wave in the rear are studied using the overset meshes technology. The results show that the aerodynamic characteristics of the evacuated tube train can be simulated using the overset meshes technology. The length of the choked flow area in front of the train decreases with the increase of the running speed, and increases with the increase of time. The length of the high pressure area in the tube is linear with the running speed and time. There are expansion wave and shock wave in the rear of the train, and the length of the shock wave increases with the increase of the running speed. Due to the existence of the suspension gap, the shock wave at the rear of the train presents an asymmetry state. The mechanism of the aerodynamic choked flow in front of the train is presented and the asymmetry shock wave phenomena in the rear are obtained using the combination of theory and numerical simulations.

Key words: evacuated tube train, choked flow, shock wave, subsonic train, overset meshes technology

中图分类号:

U171

张晓涵, 李田, 张继业, 张卫华. 亚音速真空管道列车气动壅塞及激波现象[J]. 机械工程学报, 2021, 57(4): 182-190.

ZHANG Xiaohan, LI Tian, ZHANG Jiye, ZHANG Weihua. Aerodynamic Choked Flow and Shock Wave Phenomena of Subsonic Evacuated Tube Train[J]. Journal of Mechanical Engineering, 2021, 57(4): 182-190.

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亚音速真空管道列车气动壅塞及激波现象

Aerodynamic Choked Flow and Shock Wave Phenomena of Subsonic Evacuated Tube Train

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