Optical Studies of Chemical Energy Release During Shock Initiation of Granular Explosives

摘要: Achieving a predictive understanding of shock growth to detonation in granular explosives requires an accurate description the temporal and spatial behavior chemical energy release following compression. Direct experimental observations complex mechanisms involved are very difficult, global reaction rates typically inferred from pressure or particle velocity measurements. In present study, visible emission explosive/window interface is examined using instrumentation that provides spectral, temporal, resolution. This includes image-converter streak camera record histories intensities dispersed by 0.25~m spectrometer, framing multiple images highly magnified area explosive surface, channel intensifier tube greatly enhance sensitivity either camera. Planar impact experiments were conducted on compressed-gas gun facility samples hexanitrostilbene PBX-9404. Initial pressures sample thicknesses chosen so at 12%~11% run distance could be examined. The records show distinct structure within earliest observable emission. Limited resolution hinders identification emitting species, although below 570 nm appears consistent with established C2 bands. spectral features similar two explosives, but their Presented 10th ICDERS, Berkeley, California, August 4-9, 1985. Copyright © American Institute Aeronautics Astronautics, Inc., 1986. All rights reserved. *Meraber Technical Staff, Shock Wave Explosives Physics Division.