固体火箭冲压发动机燃气流量调节的负调现象  

Flow negative regulation characteristics of solid propellant variable flow ducted rocket

作　　者：曹军伟[1] 何国强[1] 崔金平[2] 张鑫[2] 王希亮[2] 

机构地区：[1]西北工业大学燃烧热结构与内流场重点实验室,西安710072 [2]中国空空导弹研究院,洛阳471099

出　　处：《固体火箭技术》2015年第3期332-335,341,共5页Journal of Solid Rocket Technology

摘　　要：研究了可变流量固体火箭冲压发动机所存在的燃气流量负调现象,分析了负调现象产生的机理是由于燃气发生器压强的变化过程滞后于喷嘴面积的变化过程。基于燃气发生器动态工作模型,以某型固体火箭冲压发动机为例,通过仿真分析研究了燃气发生器空腔容积和燃气阀门调节速度对负调过程的影响:当燃气发生器空腔长度为0.1 m、阀门调节时间分别为0 s和2 s时,对应的燃气负调量为82.6%和1.7%、响应时间为0.21 s和1.76 s;当燃气发生器空腔长度为0.8m、阀门调节时间分别为0 s和2 s时,对应的燃气负调量为82.6%和11.4%、响应时间为1.69 s和2.85 s。基于上述分析结果,还提出了减小固体火箭冲压发动机燃气流量负调程度的措施。The flow negative regulation characteristics due to the delay between the pressure variation of gas generator and the area variation of fuel valve for the solid propellant variable flow ducted rocket（SPVFDR）was analyzed in this paper.The influence of the gas generator cavity volume and the gas valve rate on the negative regulation in a SPVFDR was investigated using numerical sim-ulation based on the gas generator dynamic model.The results show that：the negative regulations are 82.6% and 1.7% and the response time is 0.21 s and 1.76 s when the gas generator cavity length is 0.1 m and the regulation time is 0 s and 2 s.The negative regulation are 82.6% and 11.4% and the response time is 1.69 s and 2.85 s when the gas generator cavity length is 0.8 m and the regulation time is 0 s and 2 s.Based on the results,this paper brings forward the methods to reduce SPVFDR flow negative regulation.

关 键 词：固体火箭冲压发动机 燃气发生器 流量调节 负调现象 

分 类 号：V438[航空宇航科学与技术—航空宇航推进理论与工程]