关键词: 脉动式火箭发动机;触变推进剂火箭发动机;再点火;胶凝推进剂

Abstract: A new method for multi pulse pasty propellant rocket motor design was proposed by analyzing flow,heat transfer,ignition,combustion and extinction of a non Newtonian pasty propellant,in which the oxidizer and fuel were mixed uniformly.The key technology of the new method was the design of a re ignitable igniter.The two dimensional flow and heat transfer models of the propellant inside the re ignitable igniter were established and the control equations were solved numerically.The relationship among the igniter temperature,igniter length,diameter and drive pressure gradient for the reliable ignition and extinction were obtained.The variation of combustion chamber temperature was analyzed to determine time interval between two performances.A set of demonstration proto type test apparatus were also built for multi pulse firing.Some seven work pulses were obtained.Each pulse lasted about five seconds and the time interval of each pulse was about two seconds.

Key words: Impulse rocket motor;Thixotropic propellant rocket engine;Reignition;Gelled propellant