Numerical Investigations on Peak Overpressure of Blast Wave

In order to improve the computation precision of peak overpressure of the blast wave,three point explosion cases are simulated numerically with different fine grids by using the second-order Roe scheme.Based on the numerical computational scheme of the high-precision,the blast propagation speed is calculated according to the development law of a blast wave.The indirect peak overpressure is calculated by using Rankine-Hugoniot equation and compared with the direct peak overpressure calculated by numerical simulation.The comparative result indicates that: with the increase of the mesh refinement,the direct numerical peak overpressure gradually approaches the indirect peak overpressure obtained by a blast propagation speed,while the latter is almost constant.