单组元脉冲推力器挤压和排气过程分析  

Study on extrusion and exhaust process of monopropellant pulse thruster

作　　者：梁树强[1] 刘宇[1] 覃粒子[1] 王海兴[1] 

机构地区：[1]北京航空航天大学宇航学院,北京100191

出　　处：《推进技术》2009年第4期400-404,共5页Journal of Propulsion Technology

基　　金：国家自然科学基金(50706003)

摘　　要：高室压脉冲推力器使用可移动的喷注器,能够得到比供给压强高得多的燃烧室压强。为了分析其工作特性,建立了单组元脉冲推力器挤压和排气过程的数学模型,以硝酸羟铵(HAN)基单组元推进剂为例,采用四阶龙格-库塔法进行了求解。结果表明,燃烧室最大压强和平均压强都大于推进剂入口压强,而燃烧室内近似等容的燃烧过程是压强升高的原因。与所用推进剂、平均推力和面积比都相同的常规推力器相比较表明,脉冲推力器的真空比冲提高5 s,而喷管喉部面积减小89%,若两者喷管出口面积相同,则脉冲推力器的比冲将提高31.5%。By using a moving injector,the combustion chamber pressure of pulse thruster may be much higher than feed system supply pressure.In order to analyze the characteristics of pulse thruster,a mathematical model for extrusion and exhaust process of monopropellant engine was developed.Using Hydroxyl Ammonium Nitrate(HAN)-based monopropellant as an example,the equation sets were calculated with fourth-degree Runge-Kutta method.According to calculating results,the maximal pressure as well as average pressure of co...

关 键 词：液体火箭发动机 脉冲推力器 脉动燃烧 排气 

分 类 号：V434.1[航空宇航科学与技术—航空宇航推进理论与工程]