Numerical simulation study of propagation of explosion shock wave in tunnel

The governing equations were discreted by high resolution 5th-order WENO scheme and 3rd-order TVD Runge-Kutta scheme, the moving interface was tracked by Local Level Set method, and the physical quantities at both sides of physical interface were treated by GFM or RGFM. On this basis, the explosion was programmed, and the propagation of explosion shock wave at the different positions in the tunnel was simulated. The results show that the explosion shock wave interacts with the tunnel wall to gradually form a plane wave. The velocity and pressure of explosion shock wave in the tunnel are obviously superior to its velocity and pressure at the entrance. The simulation results accord well with the propagation law of the explosion shock wave in the tunnel and show that this approach is effective for the numerical simulation study of explosion shock wave propagation in tunnel.