填充系数对脉冲爆震发动机压力波影响的实验研究  

Experimental Investigation into Effects of Filling Coefficients on Pulse Detonation Engine Pressure

作　　者：张群[1] 严传俊[1] 范玮[1] 黄希桥[1] 雷恒仁[1] 

机构地区：[1]西北工业大学航空动力与热力工程系,西安710072

出　　处：《燃烧科学与技术》2002年第5期411-414,共4页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(59386027;59776001);航空科学基金资助项目(00C53019)。

摘　　要：以汽油为燃料,空气为氧化剂,在内径为56mm的脉冲爆震发动机模型内成功地产生了充分发展的爆震。测试了在同一余气系数α、不同填充系数β下的爆震波压力,并对其变化进行了分析。分析实验结果发现,在同一余气系数下,爆震室长度一定时,随着填充系数的减小,爆震波压力降低,使脉冲爆震发动机模型性能下降。当填充系数小于临界填充系数βci时,爆震室内的燃烧方式为爆燃,而不能形成爆震。Fully developed C-J detonation waves are produced successfully by PDE (pulse detonation engine) model with 56 mm ID using gasoline as fuel and air as oxidizer. Under same excess coefficient α, and various filling coefficients β, the detonation pressures are measured, and the factors influencing detonation pressures are analyzed. The experimental results have shown that for a given length of PDE model, detonation wave pressures decrease and the performances of PDE model become worse with the falling of filling coefficients ratio under the same excess coefficient. While filling coefficients are less than the critical filling coefficient βcr, deflagration rather than detonation is developed in the detonation chamber.

关 键 词：填充系数 脉冲爆震 发动机 压力波 临界填充系数 新概念发动机 

分 类 号：TK402[动力工程及工程热物理—动力机械及工程]