Abstract
Abstract The electrical ignition of a liquid gun propellant was studied in configurations suitable for medium caliber regenerative liquid propellant guns. Two igniter prototypes were developed and tested. Test results from the first igniter prototype showed that it was feasible to ignite the liquid propellant without the formation of an arc. The design of the second igniter reduced the amount of energy required for ignition and was more practical for direct application into a gun fixture. The pressure-time history in both the igniter and a test chamber was used to determine expected igniter performance in a gun fixture. The electric discharge was found to consist of two distinct phases. The first phase consisted of an initial region, dominated by ohmic heating, followed by a second region that was most likely dominated by electrolysis effects. The electrical characteristics of the initial region were predicted by a simple LRC circuit model that was based on the ohmic heating of the liquid propellant. The second phase was the arc portion of the discharge, which was not normally present in tests with the first igniter.
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