Analysis of Train Surface Pressure Generated by a High-Speed Train Passing through Tunnels with Different Lengths

作者：Luo, Jie^*; Zhang, Jiye; Zhang, Liang; Zhang, Yadong

来源：1st International Conference on Rail Transportation (ICRT), SW Jiaotong Univ, Chengdu, PEOPLES R CHINA, 2017-07-10 To 2017-07-12.

• high-speed train
• train surface pressure
• the worst tunnel length
• numerical simulation

With the continuous increasing of train speed, aerodynamic problems generated by high-speed trains passing through tunnels have attracted great attention and interest in the field of rail transport. In this study, based on the three-dimensional transient compressible Navier-Stokes equations, and kappa-epsilon two-equation turbulent model, the three-dimensional sliding mesh model of a high-speed train passing through tunnels with different lengths was built by using commercial software ICEM CFD, and the corresponding flow field calculation was conducted by using CFD software FLUENT. Influence of the tunnel length on the train surface pressure was discussed, and the relationship between the minimum train surface pressure and tunnel length was fitted by a quadratic multinomial. Simulation results indicate that the tunnel length has almost no influence on the minimum train surface pressure when the variation range of tunnel length is no more than 20% of the worst tunnel length.

• 出版日期2018
• 单位牵引动力国家重点实验室; 西南交通大学