An Investigation of High Pressure Gaseous Injections into Liquid Propellants.
Final rept. 1 Jan 77-28 Feb 78,
MISSISSIPPI UNIV UNIVERSITY
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It has been recognized for many years that liquid propellants LP offer several advantages over solid propellants when applied to guns. One of the concerns has been the repeatability of the pressure-time curves in the chamber, and occasional high pressure values that could exceed design limits of the casing. It is apparent that several variables may be involved and that the LP is extremely sensitive to small changes in conditions at ignition and in the LP chamber. It was the attempt of the work reported here to provide more information on the ignition phase of the LP gun system operation. Simulation of the penetration sequence for gaseous injections into liquid propellants provided greater understanding of the significance of geometry and flow conditions on gas bubble formation, penetration depth and rate. Comparisons of test data and a simulation model indicated that the model is good to excellent in predicting the penetration depth and rate of the injection for the first 500 microseconds. The shape of the bubble obtained experimentally approached closely a prolate spheroid. Author
- Ammunition and Explosives