大气环境变化对真空管道温度场影响的研究  

Study on the influence of atmospheric environment change on the temperature field of vacuum tube

作　　者：高超[1] 严日华 武斌 周廷波[2] GAO Chao;YAN Rihua;WU Bin;ZHOU Tingbo(National Key Laboratory of Science and Technology on Aerodynamic Design and Research,Northwestern Polytechnical University,Xi’an 710072,China;Facility Design and Instrumentation Institute,China Aerodynamics Research and Development Center,Mianyang 621000,China)

机构地区：[1]西北工业大学翼型、叶栅空气动力学国家级重点实验室,西安710072 [2]中国空气动力研究与发展中心设备设计与测试技术研究所,绵阳621000

出　　处：《实验流体力学》2023年第1期72-81,共10页Journal of Experiments in Fluid Mechanics

基　　金：国家自然科学基金(12172299,12102359)。

摘　　要：真空管道内的温度分布直接影响管道内磁浮列车的气动性能及运行安全,研究大气环境对真空管道温度场的影响,对未来真空管道列车运输系统的建设具有重要意义。基于四川省成都市近5年(2017—2021)的气象数据,总结了各季节的太阳辐射强度、空气湿度、大气温度和风速等大气环境参数,建立了真空管道辐射传热数值计算方法,采用DO(Discrete Ordinate)辐射模型研究了太阳辐射对真空管道内气流温度的影响,得到了不同季节、不同真空度下管道内气流温度分布及变化规律。研究表明:在太阳辐射的影响下,真空管道内气流温度提升较大;在相同真空度下,管道内气流温度夏季最高、冬季最低;随着真空度逐渐降低,管道内气流温度逐渐升高,真空度为0.1 atm(约10.1 kPa)时,夏季管道内气流温度最大提升56.60 K。The temperature distribution in the vacuum tube directly affects the aerodynamic performance and operation safety of the maglev train.It is of great significance to study the influence of the atmospheric environment effect for the construction of the vacuum tube train transportation system in the future.The parameters of the atmospheric environment such as the solar radiation intensity,air humidity,temperature and wind speed in each season are obtained by collecting meteorological data of Chengdu in recent five years.The numerical calculation method of the radiation heat transfer from the vacuum tube is established.The DO(Discrete Ordinate)radiation model was used to study the influence of solar radiation on the air flow in the vacuum tube,and the temperature distribution and variation rule of the air flow in the tube under conditions of different seasons and different vacuum degrees were obtained.The results show that the air in the tube has a stable temperature rise under the influence of solar radiation.With the same vacuum degree,the temperature in the vacuum tube is the highest in summer and the lowest in winter.With the gradual decrease of the vacuum degree,the temperature of the air flow in the tube increases gradually in each season.When the vacuum degree is 0.1 atm(~10.1 kPa),the air temperature in the vacuum tube increases by 56.60 K in summer.

关 键 词：真空管道 辐射传热 自然对流 大气环境 计算流体力学 

分 类 号：U237[交通运输工程—道路与铁道工程]