Analysis of flow field in a blast simulator combined-driven by explosive charge and compressed gas

The flow field characteristics of blast simulators with the explosive-driven method and compression-driven have been extensively investigated; however, limited effort has made to in combined-driven by explosive charge compressed gas. In this paper, finite volume governed Navier–Stokes equation based on an detonation k-omega SST turbulence was used analyze three kinds drive methods, namely, method, method. results show that numerical could simulate accurately comparing experimental data. Also, influence air explosion cannot be neglected case long running time. It is obtained increase pressure peak value shock waves extends positive duration effectively, owing interaction generated from rarefaction wave formed rupturing diaphragm. first overpressure value, second 5 kg TNT 0.3 MPa gas were 1.669 times, 2.172 2.308 times more than those TNT, respectively. maximum 2.56 1.162 gas, Moreover, various environments simulated controlling mass initial