关键词: 无喷管火箭发动机;固体推进剂;装药;推进剂浇注

Abstract: o improve specific impulse of nozzleless rocket motors, this paper has investigated the anti-erosion performance of low burning rate solid propellant mixed with short fibre, shaping technology of reversed cone nozzle in the contraction section of propellant "nozzle" and concentric charging method of two solid propellants with various burning rates. The specific impulse of nozzleless rocket motorsis stabilized between 1882. 0～1989. 0 N· s/kg, which satisfies our requirement.The specific impulse of nozzleless rocket motors is extremely greater than that ofthe same rocket with nozzle.

Key words: Nozzleless rocket engine;Solid propellant;Charge;Propellant casting