• CN：11-2187/TH
• ISSN：0577-6686

• 运载工程 •

### 真空管道交通列车气动阻力数值分析

1. 1. 中南大学交通运输工程学院轨道交通安全教育部重点实验室 长沙 410075;
2. 五邑大学轨道交通学院 江门 529020
• 收稿日期:2018-07-04 修回日期:2018-12-12 出版日期:2019-04-20 发布日期:2019-04-20
• 通讯作者: 常宁(通信作者),女,1984年出生,讲师。主要研究方向为轨道交通车辆。E-mail:wydxcn@163.com
• 作者简介:黄尊地,男,1987年出生,博士研究生,讲师。主要研究方向为真空空气动力学。E-mail:wyuhzd@163.com;梁习锋,男,1963年出生,教授,博士研究生导师。主要研究方向为列车空气动力学。E-mail:gszxlxf@163.com
• 基金资助:
高铁联合基金重点（U1334205）和广东省教育厅青年创新人才类（2016KQNCX172）资助项目。

### Numerical Analysis of Train Aerodynamic Drag of Vacuum Tube Traffic

HUANG Zundi1,2, LIANG Xifeng1, CHANG Ning2

1. 1. Key Laboratory of Traffic Safety on Track, Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha 410075;
2. School of Rail Transportation, Wuyi University, Jiangmen 529020
• Received:2018-07-04 Revised:2018-12-12 Online:2019-04-20 Published:2019-04-20

Abstract: When high-speed railway further speeds up, it will face huge energy consumption, aerodynamic noise and horizontal wind instability problems. Vacuum tube traffic can well solve the above operation problems. Based on the minimum space size, Knudsen number can be calculated. Based on Knudsen number, fluid flow state can be determined in the vacuum pipe. Based on the three-dimensional, unsteady and compression effect, vacuum aerodynamic calculation model is established, include train, station and pipeline, to analysis the relationship among train running speed, vacuum degree, blockage ratio, environment temperature and train aerodynamic drag. Studies show that train aerodynamic drag is parabolic incremental relationship with speed, linear incremental relationship with vacuum degree, linear incremental relationship with blockage ratio and linear incremental relationship with environmental temperature. The higher the train speed, the lower the vacuum degree, the higher the blockage ratio, the higher the environmental temperature, the higher the train aerodynamic drag. The research results provide theoretical basis for the value of Knudsen number feature length, the judgment of fluid flow state in vacuum pipeline, the numerical calculation of vacuum aerodynamics and the analysis of aerodynamic drag of vacuum pipeline traffic train.