140 km/h高速地铁隧道净空断面面积研究

来源期刊:中南大学学报(自然科学版)2019年第10期

论文作者:熊小慧 冉腾飞 梁习锋

文章页码:2603 - 2613

关键词:地铁;数值模拟;净空断面面积;阻塞比;密封指数

Key words:subway; numerical simulation; sectional area; blocking ratio; tightness index

摘    要:为了优化速度为140 km/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κ-ε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120 km/h的地铁常用截面积26 m2时,所需地铁列车密封指数为6 s;当地铁列车密封指数取4 s和3 s时,所需地铁隧道净空断面面积分别为30.5 m2和35.7 m2

Abstract: 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 three-dimensional 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.

有色金属在线官网  |   会议  |   在线投稿  |   购买纸书  |   科技图书馆

中南大学出版社 技术支持 版权声明   电话:0731-88830515 88830516   传真:0731-88710482   Email:administrator@cnnmol.com

互联网出版许可证:(署)网出证(京)字第342号   京ICP备17050991号-6      京公网安备11010802042557号