高速列车突入隧道与缓冲结构时的数值模拟

Numerical study on tunnel-hood when high-speed train passing a tunnel

对高速列车突入单线隧道 缓冲结构物体系的空气动力学进行了研究,采用有限体积法进行区域离散,控制方程为三维粘性、可压缩、不等熵、非定常流的Navier Stokes方程,并引进了两种形状的缓冲结构物以了解在隧道入口压缩波前的形成。模拟结果表明,缓冲结构物能有效地降低压力波和微气压波前的压力梯度。

This paper studies the feature of aerodynamics when highspeed train passing throughSingletrack tunnel with hood. NavierStokes equation has been presented here for threedimensional unsteady viscous compressible nonisentropic flow. And two kinds of tunnelhood are studied to investigate the formation of the compression wave front at the tunnel entrance. The results show that the tunnelhood can reduce the pressure gradient of compressed wave and the results agree with others.