Ignition of HE Charges by a Gap Compression Mechanism.
Final rept. 1 Jan 74-30 Jun 75,
ARIZONA UNIV TUCSON DEPT OF CHEMICAL ENGINEERING
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Work was completed on development, implementation and documentation of a numerical simulator, Program NEWGAP, which models the thermal ignition of condensed-phase HE subjected to sudden compression of an adjoining planar gap. The model predicts HE ignition implying initiation with the values of thermal, thermo-kinetic physical properties and gap sizes characteristic of accidential ignitions in defective encased HE systems. The NEWGAP model was modified as a four-phase composite system to represent insertion of a thin inert foil at the gasHE interface. The program was then used by the principle investigator at Los Alamos scientific Laboratory to analyze TNT ignition data in the aquarium low-shock gas compression ignition test. This data analysis was supported at LASL under a DARPA contract. Program NEWGAP successfully model these TNT ignition data. A publication describing the NEWGAP model, theoretical initiation predictions, and the TNT data was written and submitted for publication.