Transition to Detonation from Rapid-Compression (Ramp-Waves) Generated in a Burning Porous Bed,

Abstract : Increasing the nitramine content of solid rocket propellants increases the overall performance of the system as well as the sensitivity to detonation by shock initiation. In some instances a confined zone of granulated propellant adjacent to a zone of cast propellant can provide a rapid enough pressure-rise rate to shock initiate the cast material. If the cast propellant is porous, the detonation will initiate at some location ahead of the granulated bed/cast material interface. The work presented here is an effort to numerically model this Deflagration to Shock to Detonation Transition (DSDT) event. Results will be presented showing the detonation build up for propellant beds with various initial configurations and boundary conditions. (Author)