Numerical analysis on the pressure waves in tunnels

Computational Fluid Dynamics (CFD) is used for the investigation of the pressure wave. This paper analyzes the formation of pressure wave. The simulation model of pressure wave is established based on three-dimensional, unsteady, viscous Reynolds averaged equations and the k-ε two-equation turbulence model, by using dynamic grid finite volume method, the pressure wave produced when train with different sizes and speed go through the tunnel were simulated numerically. And the simulation results were compared with similar experimental data. The results showed that the conclusion and trends of the variation is consistent with the experimental results, which verified the reliability of the numerical simulation, so it can be used to predict the fluctuation law of pressure waves when the train goes through the tunnel, studying the factors that affect the pressure to optimize the design parameters of the tunnel.