爆轰波绕射问题的高精度数值模拟研究

High-resolution scheme presents an important application value in discontinuous problems, such as in explosive detonation with high pressure. In this study, a high-resolution Eulerian reaction hydrodynamic code is written based on a two-dimensional axisymmetry in a cylindrical coordinate system. The Level-set method is used to track the motion interface between the explosive/reaction product and inert medium. The entropy-based CREST model and pressure-based ignition and growth model are both used to calculate the detonation diffraction at the corner turning in the TATB-based explosive. A multi-criterion reaction-rate model, which combines the two aforementioned reaction models, is also proposed. The results show that the multi-criterion reaction model can directly calculate the dead zone without extra desensitization modification, and the height of the dead zone is basically consistent with that in the experiment.