高速列车通过隧道时压力变化的数值模拟

Numerical Study on the Pressure Change when High-speed Train Passing Through a Tunnel

采用三维粘性、不等熵、可压缩、非定常流的Navier Stokes方程,用有限体积法进行区域离散,对高速列车通过隧道时所引起的压力变化进行模拟。在模拟中同时考虑了列车速度、阻塞比、列车形状对隧道内压力的历时变化的影响,并将模拟结果与木川田一弥、森井宣的水槽实验结果和英国patchway隧道现场量测结果进行了比较,三者基本相吻合。实验及计算结果表明,隧道内产生的最大压力和列车速度、阻塞比等相关。

The paper presents a cellcentered finite volume scheme for numerical integration of NavierStokes equations for threedimensional unsteady viscous compressible nonhomentropic flow to simulate the pressure change introduced by the highspeed train passing through a tunnel. Meanwhile, the train speed, the blockage ratio (train/tunnel) and the shape of train are considered for the time history of pressure change in the tunnel. The results calculated here agree with well experiments of Muchang and Senjingxuan and the results got in site from Patchway tunnel in England. The results of the calculation and experimentsshow that the maximum pressure in tunnels is related with the speed of the train, the blockage ratio and others.