摘要
为了研究凹面腔构型对环形射流聚心碰撞产生激波会聚起爆爆震的影响及作用规律,本文以氢气和空气混合物为例,对不同尺寸和曲率的凹面腔内激波会聚起爆爆震过程进行了数值模拟,结果表明,在凹面腔尺寸的选择上,要同时考虑射流强度和凹面腔空间对入射激波造成的衰减作用,平衡两者,从而选择出合适的凹面腔。凹面腔曲率既不能太大,也不能太小。本文算例中,直径为74mm,开口直径为70mm的部分球形凹面腔起爆性能最优。
In order to investigate the influence of cavity configuration on detonation initiation via shock wave focus, detonation initiation with different size cavities and different curvature cavities were simulated. hydrogen-air mixture was used. The results indicate that choosing cavity size should counterpoise both jet in- tensity and attenuation of incidence shock wave caused by cavity vacuum. Cavity curvature neither too big nor too small. In this article, the performance of portion sphericity cavity with diameter of 74mm is best.
出处
《空气动力学学报》
CSCD
北大核心
2013年第1期82-87,93,共7页
Acta Aerodynamica Sinica
关键词
两级脉冲爆震发动机
爆震波
激波
two-stage pulse detonation engine
detonation wave
shock wave
