Detonation Propagation in 180 Ribs of an Insensitive Explosive

Non-ideal detonation wave propagation in 180 ribs of an insensitive high explosive is studied using the DSD (Detonation Shock Dynamics) method which is combined with the LS (Level Set) method in body-fitted coordinate. The rule of detonation wave propagation in 180 explosive ribs is obtained through comparing and analyzing the computed and experimental results. The explosive ribs can detonate in steady state regime, and in this case the detonation front is steady as viewed in a system of polar coordinates rotating with a fixed angular velocity. The shape and angular velocity of this steady front is independent of the outer radius of the rib. The formation of steady-state regime depends on the rib dimensions and the material of the shells covering the rib edges. Some experimental formulae describing the detonation front propagation in explosive ribs are also studied. It is shown that the change of detonation wave velocity can be accurately described by these experimental formulae, which have reference value for experimental measurement and estimation.