水工质MPT参数设计与性能预估  

The Parameter Design and Performance Estimation of the Water Fed Microwave Plasma Thruster(MPT)

作　　者：黄先科[1] 毛根旺[1] 胡伟[1] 

机构地区：[1]西北工业大学航天学院,西安710072

出　　处：《机械科学与技术》2011年第10期1719-1723,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：武器装备预研基金项目(9140C52030106HK03)资助

摘　　要：介绍了水工质微波等离子体推力器(MPT)的基本组成和工作原理,分析了水工质MPT的重要参数,并对水工质MPT进行了性能预估。结果表明:设计状态下,水工质MPT的推力在350 mN～450 mN,比冲达3 674 N.s/kg;流量对MPT比冲的影响较小,对推力的影响比较明显,最佳工作点流量约为120 mg/s;沿喷管轴向在喷管的前半部分喷气速度受温度影响较小,但是在喷管的后半部分喷气速度受温度影响明显,且温度越高喷气速度越大、比冲也越高。In this paper, the basic components and operating principles of water fed microwave plasma thruster （MPT） were introduced, the key MPT parameters were also analyzed, and the performances of MPT were estimated. The results shown that MPT was in the range 350 mN ~ 450 mN with a maximum specific impulse of 3 674 N · s/kg under the design conditions; the rate of mass flow had a obvious influence on the thrust of MPT and a slight on the specific impulse, whose optimum operation point in the experiment was in corresponding to the rate of mass flow of 120 mg/s ; the Mach number along the axis was not affected by the temperature of inlet flow, but the gas velocity in the domain of expansion section of nozzle was affected obviously; the thrust efficiency of MPT could be improved with the increasing of temperature of inlet gas.

关 键 词：水 微波等离子推力器(MPT) 性能预估 

分 类 号：V43[航空宇航科学与技术—航空宇航推进理论与工程]