真空管道高速列车首尾平均压差变化规律研究  

Study on the Variation of the Average Differential Pressure between the Head and Tail of High-Speed Trains in Vacuum Tube

作　　者：王海明 李庆领[1] 贾文广[1] WANG Haiming;LI Qingling;JIA Wenguang(School of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,China)

机构地区：[1]青岛科技大学机电工程学院,青岛266061

出　　处：《真空科学与技术学报》2021年第12期1164-1170,共7页Chinese Journal of Vacuum Science and Technology

基　　金：山东省教育厅“青年科学基金”(ZR2019BEE014)项目。

摘　　要：为了探究列车马赫数、真空度、阻塞比对真空管道高速列车首尾平均压差的影响,本文建立了三节车组的真空管道交通系统模型,运用局部网格加密技术,在Fluent中采用Realizable湍流模型,得到真空管道交通系统的压力场,分析列车首尾平均压差的变化规律。结果显示,列车马赫数、真空度、阻塞比的增加都会使得列车首尾平均压差变大。列车首尾平均压差与管道真空度呈线性递增关系;与列车的马赫数成抛物线递增关系;在阻塞比为0.2~0.4时以较低的速度线性增加,在阻塞比为0.4~0.5时以较高的速度线性增加。In order to investigate the influence of the Mach number of the train,the vacuum degree,and the blockage ratio on the average pressure difference between the head and tail of a high-speed train in a vacuum tube,a vacuum tube transportation system model with three train sets is established in this paper.The realizable turbulence model in Fluent is used to obtain the pressure field of the vacuum tube transportation system and analyze the variation law of the average pressure difference between the head and tail of the train by using local mesh encryption technology.The results show that an increase in the Mach number,vacuum degree,and blockage ratio of the train all result in a larger average pressure difference between the head and tail of the train.The average differential pressure between the head and tail of the train is linearly increasing with the vacuum degree of the tube;parabolic increasing with the Mach number of the train;linearly increasing at a lower speed at a blockage ratio of 0.2 to 0.4 and linearly increasing at a higher speed at a blockage ratio of 0.4 to 0.5.

关 键 词：首尾压差 阻塞比 马赫数 真空度 

分 类 号：TB79[一般工业技术—真空技术]