摘要
为了研究喷管结构形式对爆震发动机性能的影响,本文以氢气和氧气混合物为例,对不同喷管结构形式的爆震发动机工作过程进行了数值模拟。模拟结果表明:采用收敛型喷管可以增加爆震管内压力,但会造成喷管内的负推力;采用扩张型喷管会使得喷管内的压力迅速下降,但可以提供正推力;采用收扩型喷管时喷管的冲量一般较低,但爆震管的冲量会有提升,可以显著提高爆震发动机性能。
In order to investigate the influence of different nozzles'effect on Pulse Detonation Engine(PDE) performance,PDE with different nozzles'effects are simulated and hydrogen-oxygen mixture is used.The results indicate that,the convergent nozzle can increase detonation tube pressure but form negative thrust in nozzle;the divergent nozzle can decrease nozzle pressure but form positive thrust in nozzle;the convergent-divergent nozzle can decrease impulse in nozzle but increase detonation tube impulse and therefore advances remarkably the performance of pulse detonation engine.
出处
《应用力学学报》
CAS
CSCD
北大核心
2010年第4期650-655,共6页
Chinese Journal of Applied Mechanics
关键词
脉冲爆震发动机
爆震波
喷管
pulse detonation engine,detonation,nozzle.
