引射器形式对脉冲爆震发动机性能的影响分析  

Analyse of ejector forms influence on pulse detonation engine performance

作　　者：何立明[1] 曾昊[1] 苏建勇 罗俊[1] 

机构地区：[1]空军工程大学工程学院,陕西西安710038 [2]空军飞行试验训练基地,河北沧州061000

出　　处：《空气动力学学报》2009年第6期718-722,共5页Acta Aerodynamica Sinica

摘　　要：为了研究引射器结构形式对脉冲爆震发动机性能的影响,以氢气和氧气混合物为例,采用数值计算方法,对加装收敛、扩张和收扩型三种引射器的脉冲爆震发动机进行了数值模拟,并对其性能进行了比较与分析。计算结果表明,只有收扩型引射器能起到增推作用。同时,将二次流率与增推比相比较,发现二者成正比关系。研究结果对脉冲爆震发动机设计中引射器的选型具有一定的参考意义。To research thrust augmentation of ejector forms driven by pulse detonation engine, numerical calculation method was used to simulate pulse detonation engine with converging, diverging and convergingdiverging ejector. The simulation was carried out in hydrogen-oxygen mixture. The results indicated that ejector systems can utilize the energy stored in the strong shock wave exiting the detonation tube to augment the impulse obtained from the detonation tube alone. And the increase of mass flow rate of secondary stream can lead to the increase of impulse augmentation ratio. Impulse augmentation ratios of converging-diverging ejector of 1.68 were achieved.

关 键 词：脉冲爆震发动机 引射器 数值模拟 

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]