An Aerothermal Study of Influence of Blockage Ratio on a Supersonic Tube Train System  

作　　者：SUI Yang NIU Jiqiang YUAN Yanping YU Qiujun CAO Xiaoling WU Dan YANG Xiaofeng 

机构地区：[1]School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China [2]School of Architecture and Design,Southwest Jiaotong University,Chengdu 610031,China [3]State Key Laboratory of Aerodynamics,China Aerodynamics Research and Development Center,Mianyang 621000,China

出　　处：《Journal of Thermal Science》2022年第2期529-540,共12页热科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(51805453 and 51978575);the Fundamental Research Funds for the Central Universities(2682018CX14);Project funded by China Postdoctoral Science Foundation(2019M663551);Doctoral Innovation Fund Program of Southwest Jiaotong University。

摘　　要：Evacuated tube transportation is an important development direction for the high-speed transportation technology of the future.However,a train running at supersonic speed in a closed tube can create an unstable aerothermal phenomenon,causing the temperature to rise sharply inside the tube and endangering the safe operation of trains and equipment.The blockage ratio is one of the key factors affecting the aerodynamic characteristics in the tube.In this paper,a 2 D axisymmetric model and Delayed Detached Eddy Simulation(DDES)based on the Shear Stress Transport(SST)k-ωturbulence model are used to study the aerothermal environment in the tube.The calculation method used in this paper was verified by a wind tunnel experiment.The aerothermal phenomenon and distribution of the flow field in the tube with different blockage ratios were compared and analysed.The results show that the aerothermal environment is significantly affected by the blockage ratio.A choking limit formed in the flow field will aggravate the aerodynamic phenomenon as the blockage ratio increases,which further deteriorates the aerothermal environment of the tube.Moreover,the existence of the choking limit,shock wave,and Mach disk make the flow field in the tube more complicated.

关 键 词：tube train aerothermal environment blockage ratio choking limit numerical simulation 

分 类 号：U292.929.2[交通运输工程—交通运输规划与管理]