中文摘要：

高速列车通过隧道时会引起较大的隧道内压力波动,对车体造成较大的气动载荷,是高速列车车体设计和通风系统设计中所必须要考虑的问题。基于三维非定常不可压缩流动的纳维-斯托克斯方程,采用大涡模拟的湍流模型和地面静止而列车移动的动网格算法,对CRH2动车组以100 m/s的速度通过长100 m的隧道进行了动态数值模拟计算。结果表明：当列车车头进入隧道时,车头前端会形成一个向隧道出口传播的正压波,到达隧道出口后反射,并形成一个向隧道入口传播的负压波,压力波的传播与反射使隧道内空气压力发生剧烈变化,严重影响列车的安全平稳运行。

英文摘要：

Internal pressure waves will be caused when high speed train travels through tunnels,which induce big pneumatic loads for car body. Tunnel pressure wave problem is the key factor which must be considered during the design of high speed train and the air ventilation system. Based on three- dimensional unsteady incompressible flow Navier- Stokes equations,the large eddy simulation（ LES） turbulence model and dynamic mesh algorithm that ground is stationary but the train is moving is utilized to make dynamic numerical simulation computations for CRH2 high- speed train which is passing through a 100 m tunnel at a speed of 100 m / s. The results show that when the headstock of the train passes through a tunnel,a positive pressure wave is generated in front of the headstock of the train which propagates along the tunnel towards the exit and reflects when reaching the exit,and it becomes a negative pressure wave which propagates towards the entrance. The propagation and reflection of the pressure wave dramatically change the pressure of the air in the tunnel,which seriously affects safe and smooth running of the trains.