高速列车隧道内等速会车时气动作用力的数值模拟  

Numerical Simulation of Aerodynamic Forces of High-speed Trains Passing Each Other at the Same Speed through a Tunnel

作　　者：赵晶[1] 李人宪[1] 刘杰[1] 

机构地区：[1]西南交通大学机械工程学院,四川成都610031

出　　处：《铁道学报》2010年第4期27-32,共6页Journal of the China Railway Society

基　　金：高等学校博士学科点资助项目(20040613010);高等学校创新工程培育基金资助项目(705044);国家自然科学基金项目(50525518)

摘　　要：基于三维非稳态黏性Navier-Storkes方程及k-ε两方程紊流模型,利用包含移动网格技术的计算流体动力学方法,对高速列车在长隧道内等速交会过程进行动态数值模拟,模拟2列相同外型的列车以4种车速交会时的流场,分析会车过程中交会列车所受气动侧向力、侧翻力矩及偏转力矩的变化情况,初步得到隧道内会车时气动作用力的变化规律。计算结果表明:隧道内列车交会过程使列车受到较大的侧向力、侧翻力矩和偏转力矩;每节车厢侧向力和侧翻力矩方向经历2次变化;偏转力矩方向经历4次变化。气动力与力矩的大小是车速的二次方函数。气动力及气动力矩的变化率与车速的三次方成正比。On the basis of the 3D time related viscous compressible fluid Reynolds average Navier-Stokes equations and κ-ε two-equations turbulent model,the moving process of two high-speed trains of the same external profile passing each other through a tunnel at 4 running speeds（200 km/h,250 km/h,300 km/h and 350 km/h） was simulated by means of the fluid dynamics computation method including the moving grids technology.The aerodynamic side forces,rolling moments and yawing moments produced by aerodynamic pressures on the train walls were analyzed.The basic changing law of the aerodynamic forces in passing was obtained initially.The simulation results show as follows： Trains bear considerable side forces,rolling moments and yawing moments when passing each other through a tunnel;for each carriage in passing,the direction of the side force and the rolling moment changes by two times and that of the yawing moment changes by four times;the magnitudes of the aerodynamic force and moment is the quadratic function of the running speed of the passing train;the changing ratio of the aerodynamic force and moment is directly proportional to the cube of the running speed of the passing train.

关 键 词：高速列车 隧道内会车 气动作用力 数值计算 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]