Numerical simulation of deflagration-to-detonation transition in high energy propellant

The control equation and the secondary equation for deflagration-to-detonation transition (DDT) of NEPE high-energy propellant in the granular-beds were established by means of the one-dimension two-phase reacting flow model. The equations were numerically solved by using MacCormack difference scheme, and the calculated results were compared with test results. The results show that the numerical prediction was consistent with the test results. There exists dynamic compaction with various degrees in the granular-beds at each stage of DDT, and the interaction of compressive wave and combustion wave would be the inherent cause for deflagration-to-detonation transition of NEPE propellant.