地铁双线隧道内流动特性的数值模拟  

Numerical simulation of flow characteristics in bi-directional subway tunnel

作　　者：贾力[1] 黄鹏[1] 李时娟[1] 

机构地区：[1]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《热科学与技术》2006年第4期331-334,共4页Journal of Thermal Science and Technology

基　　金：国家重点基础研究发展计划资助项目(2005CCA04700)

摘　　要：列车运行时的活塞效应对隧道内空气的流动特性有显著的影响。采用CFD数值模拟的方法,着重对地铁双向隧道内列车运动对隧道内空气流动特性的影响作了初步的讨论。模拟结果显示,在双线隧道中,流场的分布是两列车所引起的活塞效应共同作用的结果;两列车相向行驶时,各自的活塞效应会减弱甚至相互抵消,不利于区间隧道内的自然通风。The piston effect caused by train traveling in tunnel has significant influence on the air tlow in the tunnel. Flow characteristics in bi-directional subway tunnel with trains moving in opposite direction were discussed with CFD numerical analysis. The simulation results show that the distributions of flow velocity and pressure in the bi-directional tunnel are influenced by the combined effect of the two trains. In addition, the piston effect of each train is weakened even counteracted with each other thus the natural ventilation performance of the piston effect will abate.

关 键 词：地铁隧道 活塞效应 流动特性 数值模拟 

分 类 号：U453.5[建筑科学—桥梁与隧道工程] O37[交通运输工程—道路与铁道工程]