Coarse Explosive Particles of PBX as a Dominant Factor of Detonation Instability

Plaksin, I.; Campos, J.; Direito, J.; Mendes, R.; Simões, P.; Portugal, A.; Ribeiro, J.; Góis, J.
April 2004
AIP Conference Proceedings;2004, Vol. 706 Issue 1, p887
Academic Journal
In this paper we have studied the phenomenon of local instabilities of DW in PBX compositions 82%HMX/18%GAP that are distinguished by the HMX grains sizes. A multi-channel high-resolution optical method based on application of 64-optical fiber strips has been applied for the 3D-registration of DW flow in PBX and the Us field in optical stack monitor. Scale of spatial/temporal fluctuations of detonation flow in PBX is characterized as a function of mean grain sizes d50 and mean values of the front curvature. We have found that for high dense PBX, coarse HMX particles play the dominant role in mechanism of cluster/cell formation in detonation flow. Local fluctuations occur as a result of delay of shock reaction inside the coarse HMX crystals, followed by the ejecta phenomenon. © 2004 American Institute of Physics


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