Ignition and growth modeling of short pulse shock initiation experiments on fine particle Hexanitrostilbene (HNS)

[摘要] Hexanitrostilbene (HNS) is a booster explosive that is usually initiated using short pulse duration shock waves produced by high velocity impacts with thin flyer plates. HNS is generally used at a density of 1.60 g/cm3which implies a porosity of 8%. It has been produced in several forms (I-IV, ultrafine, etc.) with various particle surface areas. The threshold flyer velocities for shock induced detonation versus failure to detonate for these different surface area materials vary slightly, but, in this paper, an average Ignition and Growth reactive flow model parameter set was determined using all of the experimental data from several aluminium and KaptonTMflyer plate studies. This data ranged from shock pressures of 4 GPa to above the Chapman-Jouguet (C-J) detonation pressure (∼20 GPa) and from 1 to 120 nanoseconds in time duration. Good agreement was obtained for the available short pulse duration detonation verses failure to threshold flyer velocity data using the Ignition and Growth model,

[发布机构] Lawrence Livermore National Laboratory, Livermore; CA; 94551, United States^1

[关键词] Detonation pressure;Hexanitrostilbene (HNS);High-velocity impact;Particle surface area;Reactive flow model;Shock initiation;Short pulse duration;Surface area materials