Abstract
Abstract : Three ignition concepts are reviewed for use in medium and large caliber regenerative liquid propellant (LP) guns. The concepts are based on the use of hydrogen and air, fuel and air, and compression. Data was only obtained for the hydrogen and air concept. The feasibility of the two other concepts are based on system studies. The ignition goals were the generation of a pressure of about 18 MPa in 5 msec. The liquid propellant selected for the study was the hydroxylammonium nitrate (HAN) based monopropellants designated 1845 and 1846. Two types of igniters using hydrogen were examined. For the first type, hydrogen, and air was considered which was ignited by either a spark or a volume type of ignition source. The second type consisted of hydrogen and oxygen diluted with argon and supplemented with liquid propellant. Ignition was achieved by a discharge of electrical current through the propellant jet during the initial injection. The second type has the advantage of reducing the hydrogen requirement.
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