环喉环簇塞式喷管推力矢量控制研究

针对环喉环簇塞式喷管发动机的结构特点,提出了二次流喷射实现推力矢量控制的方案,并用数值方法研究了二次流的总温、总压、位置、角度、流量、喷射孔的数量以及孔间距等工作参数对推力矢量控制性能的影响。结果表明,侧向力与二次流的总温、总压、流量成正比关系;多孔比单孔的喷射效果好,孔与孔的间距要适当;逆向喷射比顺向喷射产生的侧向力大;喷射孔位置的选取受工作压比的影响很大。

Study on thrust vector control of clustered plug nozzle

Based on the structure characteristics of clustered plug nozzle,a scheme that using secondary injection to realize thrust vector control was put forward.The effects of some working parameters on thrust vector control performance were investigated by means of numerical simulation method,such as total temperature,total pressure,position,angle,mass flow,number of injection holes,pitch of holes and so on.The results show that the side force is directly proportional to total temperature,total pressure and mass flow of secondary flow;the injection effect of multiple holes is better than that of single hole,the pitch of holes is suitable;the side force of reverse injection is bigger than that of forward injection;the working pressure ratio has great effects on the location selection of injection holes.