Reactive Hydrokinetics in the Early Stage of Shock Initiation of PBX 9501

Through the application of Lambourn's CIM model, a simplified analytic method was proposed to study the post-shock reactive flow in the case of unknowing the real formula of reaction rate. Based on this method, a more reasonable empirical reaction rate can be extracted to better understand the initial hydrodynamic phenomenon during shock to detonation transition. The method assumes that reaction rate is a function of time. The history and relationship of particle velocity, pressure, extent of reaction and reaction rate can be obtained by combining with experimental particle velocity. The results show that the decrease of particle velocity on impact interface relates with extent of reaction, and peak reaction rate after shock wave appears within the peaks of particle velocity and pressure.