140km/h高速地铁隧道净空断面面积研究  

Study on sectional area of high-speed subway tunnel with speed of 140km/h

作　　者：冉腾飞 梁习锋[2,3,4] 熊小慧[2,3,4] RAN Tengfei;LIANG Xifeng;XIONG Xiaohui(Beijing Multiple Unit Train Depot, China Railway Beijing Group Co. Ltd., Beijing 102600, China;Key Laboratory of Traffic Safety on the Track of Ministry of Education,School of Traffic & Transportation Engineering, Central South University, Changsha 410075, China;Joint International Research Laboratory of Key Technology for Rail Traffic Safety,Central South University, Changsha 410075, China;National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle,Central South University, Changsha 410075, China)

机构地区：[1]中国铁路北京局集团有限公司北京动车段,北京102600 [2]中南大学交通运输工程学院轨道交通安全教育部重点实验室,湖南长沙410075 [3]中南大学轨道交通安全关键技术国际合作联合实验室,湖南长沙410075 [4]中南大学轨道交通列车安全保障技术国家地方联合工程研究中心,湖南长沙410075

出　　处：《中南大学学报（自然科学版）》2019年第10期2603-2612,共10页Journal of Central South University:Science and Technology

基　　金：国家科技支撑计划项目(2015BAG12B01-24)~~

摘　　要：为了优化速度为140km/h高速地铁隧道的净空断面面积,采用三维、可压、非定常N-S方程的数值计算方法和κε湍流模型,分析地铁列车由明线驶入不同截面积隧道时所产生的气动效应。研究结果表明:地铁列车由明线驶入隧道时产生的气动效应比在隧道内区间运行时产生的气动效应更加剧烈;当隧道净空断面面积采用现有速度为120km/h的地铁常用截面积26m^2时,所需地铁列车密封指数为6s;当地铁列车密封指数取4s和3s时,所需地铁隧道净空断面面积分别为30.5m2和35.7m^2。In order to optimize the sectional area of high-speed subway tunnel with speed of 140 km/h, the aerodynamic effect was analyzed based on turbulence model of κ-ε and unsteady N-S equations method of threedimensional and compressible viscous fluid, when trains run in several tunnels of different sectional areas with the conditions of trains entering tunnel from open air. The results show that the aerodynamic effect caused by trains entering tunnel from open air is more severe than that of trains running between stations in tunnel. If the sectional area of the tunnel is 26 m2 used by the current subway with speed of 120 km/h, the tightness index of the train needs 6 s. If the tightness index of the train is 4 s and 3 s, the sectional area of the subway tunnel needs 30.5 m2 and 35.7 m2, respectively.

关 键 词：地铁 数值模拟 净空断面面积 阻塞比 密封指数 

分 类 号：U270[机械工程—车辆工程]