列车进入隧道时产生涡流的数值模拟  

Numerical Simulation of the Vortex Induced by a Train Entering into a Tunnel

作　　者：骆建军[1] 王梦恕[1] 高波[2] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]西南交通大学土木学院,四川成都610031

出　　处：《北京交通大学学报》2007年第1期63-68,共6页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：中国博士后科学基金资助项目(中博基字[2005]193)(CC06001);国家自然科学基金资助项目(50178060)

摘　　要：给出了列车穿越隧道时在隧道入口形成涡流场的数值模拟过程.控制方程为三维黏性、可压缩、等熵、非定常流的N_S(Navier_Stokes)方程,空间离散采用了中心有限体积法格式,时间采用预处理二阶精度多步后差分格式进行离散,对列车与隧道之间的相对移动采用移动网格技术处理.计算结果与国外的试验结果基本一致.研究结果表明,在整个涡流的形成过程中,可以将这个过程分为连续的4个阶段,即涡的形成、发展、传播及破坏阶段.研究结果还表明,涡受到列车头部形状的影响要比受到列车速度的影响要大;喷射流速度与列车速度有关系.A cell-centered finite volume method for numerical integration of N-S equations has been presented here for three-dimensional unsteady viscous compressible isentropic flow to simulate the formation of vortex produced by the train entering a tunnel. The numerical procedure is based on preconditioned second-order accurate backward difference in time, the relative motion between the train and tunnel treated with sliding mesh technique. The results of numerical simulation agree with that of foreign. The results show that the formation of the vortex constitutes four phases, the pre-vortex phase, the vortex development phase, the vortex convection phase and the vortex breakdown phase. The duration of each of these phases has its own features,and further more,the effect of the train nose geometry is greater than the train speed＇s on the vortex evolution, and the jet velocity is related to the train speed.

关 键 词：列车 空气动力学 隧道 涡 数值模拟 

分 类 号：U451.3[建筑科学—桥梁与隧道工程]