CAJ | 학술논문

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0．8 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。
연구료가변류량고체화전충압발동궤소존재적연기류량부조현상，분석료부조현상산생적궤리시유우연기발생기압강적변화과정체후우분취면적적변화과정。기우연기발생기동태공작모형，이모형고체화전충압발동궤위례，통과방진분석연구료연기발생기공강용적화연기벌문조절속도대부조과정적영향：당연기발생기공강장도위0．1 m、벌문조절시간분별위0 s화2 s시，대응적연기부조량위82．6％화1．7％、향응시간위0．21 s화1．76 s；당연기발생기공강장도위0．8 m、벌문조절시간분별위0 s화2 s시，대응적연기부조량위82．6％화11．4％、향응시간위1．69 s화2．85 s。기우상술분석결과，환제출료감소고체화전충압발동궤연기류량부조정도적조시。
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 re?sponse 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 regula?tion.