Numerical simulation of the effect of the vertical shaft to the propagation laws of the compression wave in high-speed railway tunnels

The control equations use the Navier Stokes of three dimensional viscous, compressible, isentropic, unsteady flows, and the spatial discretization uses the cell-center finite volume method to do the numerical simulation of the propagation laws of the compression wave when the high-speed train pass through the tunnel with the vertical shaft, and the simulation results are consistent with the on-site test data perfectly. Detailed analysis of the effect of the vertical shaft shape, the cross-sectional area, the connecting forms of the shaft and tunnel to the propagation laws of the compression wave in the tunnel. Simulation results show that the processes of the propagation laws of the compression wave in the tunnel are complicated because of the vertical shaft. It should be comprehensively considered because the vertical shaft can cause secondary micro-pressure wave, although it makes the peak of the micro-pressure wave lower at the exit of the tunnel.