【摘要】 为了在脉冲推力器设计中获得合理的设计参数,采用推力测试装置直接测量推力器推力的方法,研究了在不同直径喷喉、不同厚度膜片、不同质量主装药下的推力和总冲。喷喉直径由3 mm增大到4.5 mm,在喉径4 mm时推力和总冲最大,表明喉径太大或太小时推力都不能达到最大值。膜片厚度由0.2 mm增大到0.5 mm,推力由325 N变为429 N,总冲由0.161 N.s变为0.216 N.s,表明增加膜片厚度,输出单调增大。主装药量由180 mg增大到420 mg,推力由144 N变为347 N,总冲由0.068 5 N.s变为0.172 N.s,表明增大药量,推力和总冲都增加。更多还原

【Abstract】 In order to obtain the appropriate design parameter of the impulse thruster,the method for measuring the thrust with a test device was used.The thrust and impulse were studied of the thrusters with different diameter of nozzle throat,different thickness of sealed film and different mass of main charge.The diameter of nozzle throat varies from 3 mm to 4.5 mm.The thrust and impulse is maximal in condition of 4 mm nozzle throat.It shows that the thrust will not be maximal if the diameter of nozzle throat is more than 4 mm or less than 4 mm.When the thickness of sealed film varies from 0.2 mm and 0.5 mm,the thrust increases from 325 N to 429 N and impulse increases from 0.161 N·s to 0.216 N·s.The results show that if the thickness of sealed film become heavy,the thrust and impulse increase.When the mass of main charge varies from 180 mg to 420 mg,the thrust increases from 144 N to 347 N and the impulse increases from 0.068 5 N·s to 0.172 N·s.It shows that the thrust and impulse increase along with the increase of the mass of main charge.更多还原