环境压力、参数相关性对PDE性能的影响研究  

Study of Influence for Ambient Pressure and Correlation Between Parameters on PDE Performance

作　　者：陈超[1] 何立明[1] 罗俊[1] 郭向阳[1] 

机构地区：[1]空军工程大学工程学院,陕西西安710038

出　　处：《燃气涡轮试验与研究》2006年第4期48-51,共4页Gas Turbine Experiment and Research

摘　　要：以非稳态方式工作的脉冲爆震发动机(PDE),环境压力、参数之间的强相关性对其性能影响很大。计算结果表明:对于直管PDE,随着环境压力的减小,比冲单调增加,而推力是先减小后增加;直管PDE加装锥形扩张喷管后,低环境压力下可使比冲和推力增加,但高环境压力下会使PDE性能显著恶化。经数学推导发现,参数之间的强相关性为PDE的高性能做出了贡献。Ambient pressure and correlation between parameters have strong influence on PDE performance when working is unsteady. Calculation results show that Iap monotonically increases and the thrust first decreases and then increases when ambient pressure is lowered for the straight PDE. The impact of the conical divergent nozzle is that Isp and the thrust significant increase at low values of ambient pressure. At high ambient pressure, the nozzle is seen to be detrimental. The conclusion that strong correlation between parameters contributes to the high performance of PDE is gained by math deduction.

关 键 词：脉冲爆震发动机 环境压力 参数相关性 性能 

分 类 号：V235.22[航空宇航科学与技术—航空宇航推进理论与工程]