Flow Characteristics and Aerodynamic Heating of Tube Trains in Choked/Unchoked Flow:A Numerical Study

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

作者机构：Graduate School of TangshanSouthwest Jiaotong UniversityTangshan063000China School of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu610031China State Key Laboratory of AerodynamicsChina Aerodynamics Research and Development CenterMianyang621000China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2023年第32卷第4期

页      面：1421-1434页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 082304[工学-载运工具运用工程] 08[工学] 0807[工学-动力工程及工程热物理] 080204[工学-车辆工程] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0823[工学-交通运输工程] 

基　　金：This work was supported by Hebei Province Natural Science Foundation(E2022105032) National Natural Science Foundation of China(51978575,52172359) 

主　　题：hyperloop choked/unchoked flow aerodynamic phenomenon numerical simulation 

摘      要：Hyperloop has become one of the key reserve technologies for future high-speed rail *** gas in the tube is compressed and rubbed,leading to a strong aerodynamic heating *** research on the flow field characteristics and aerodynamic heating effect of hyperloop is in its infancy,and that on the flow field structure is *** this study,the nozzle theory was used to make a preliminary judgment on the choked flow phenomenon in the *** on the flow results obtained under different working conditions,the identification basis of the choked flow phenomenon in the hyperloop was ***,the effect of the choked/unchoked flow on the flow structure,temperature,and pressure distribution of the annular space in the tube was *** on traditional high-speed railway aerodynamics,according to relevant theories and calculation in aerospace field,and combined with the model test data,the reliability verification analysis on the characteristics of the flow field are carried *** structure of the flow filed in the tube can be divided into choked and *** judgment is dependent on whether the throat reaches the speed of *** the choked flow,a normal shock wave is formed in front of the tube *** temperature rise of the local flow field exceeds 50 K;the temperature rise of the stagnation region exceeds 88 K,and the pressure is approximately 1.7 times that of the initial pressure in the *** the flow is unchoked,differences arise in the distribution of the flow field corresponding to different incoming Mach *** the incoming flow is supersonic,the flow field maintains a supersonic speed,and a bow-shaped shock wave is formed at the front of the tube *** to the shock wave or expansion wave,the local flow field exhibits significant fluctuations in temperature and ***,when the incoming flow is subsonic,the flow field in the tube maintains a subsonic speed,and no shock wave structure is