高室压脉冲推力器设计与实验研究

为了检验高室压脉冲推力器的设计并掌握液体N2O／酒精推进剂的点火燃烧规律，进行了实验研究。可移动喷注器的动密封采用O型圈结构，推进剂的流动通道既能保证充填时推进剂的流通，又能保证挤压时不会有回流。冷试结果表明密封效果良好。测定了系统的热试时序，实现了稳态条件下的点火燃烧，燃烧室压力为2．58MPa。由于液体N2O的饱和蒸汽压较高，容易蒸发，积存在燃烧室内的蒸气造成点火压力峰比较高。

Design and experiment of a pulse thruster with high combustion chamber pressure

In order to verify the design of a pulse thruster with high combustion chamber pressure and grasp the combustion characteristic of liquid N2O /alcohol,the experiments were carried out.Using O-ring as dynamic sealing of the moving injector.The propellant flow paths ensure propellants flowing from manifold cavities to extrusion cavities without propellants count-flow.According to the test results,the sealing of O-rings works well.The time sequence was measured,and the ignition was achieved.The combustion cham...