INVESTIGATION OF LOW-VELOCITY DETONATION PHENOMENA IN LIQUID PROPELLANTS, FUELS AND EXPLOSIVES.
Annual rept. 1 Mar 69-28 Feb 70,
STANFORD RESEARCH INST MENLO PARK CALIF
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A reevaluation is made of existing low-velocity detonation LVD data to identify individual mechanisms contributing to LVD initiation and propagation in energetic liquid explosives. LVD is observed only in confined explosives. Container walls induce cavitation in the liquid ahead of a shock which compresses the cavities to produce hot spot ignition of the material. The wall interaction is investigated theoretically to show that precursor pressure waves of sufficient strength to cause cavitation are present. Properties of systems that influence LVD are examined and compared to observed phenomena. Experiments to examine the effects of confinement are described. Wall thickness is varied, keeping all other parameters constant. The results indicate that for a given system there is probably a single critical wall thickness that will support stable LVD.