气动阀对脉冲爆震发动机爆震性能的影响研究

开展常温常压进气条件下气动阀式两相脉冲爆震发动机的研究具有重要的理论意义和工程应用价值。本文描述了针对气动阀式两相爆震发动机的进气装置-气动阀所作的理论和试验研究工作。通过不同气动阀参数下的冷态流场和燃烧特性试验研究，设计出了包含钝体和盖子的组合式气动阀，并获得了不同钝体堵塞比和不同盖子尺寸时燃烧波压力和火焰传播速度的变化关系。通过对气动阀的结构设计研究和试验分析得出结论，随着盖子内径变大，对产生爆震是不利的。

Effect of Aerovalve on Performance of Detonation Combustion

A suitable aerovalve is adopted for multi-cycle valve le ss pulse detonation engine filling liquid fuel/air aerosol initially at 300 K a nd 0 1 MPa as the detonable mixture. In this study, the combined aerovalve, con sisted of blunt body and cover, is designed and applied on the two-phase pulse detonation engine. Experiments are made by using the structure parameters, inclu ding block ratio and diameter of cover, on the combustion pressure and the flame velocity. According to the research, the relationship between the detonation wa ve pressure,the average detonation wave velocity and the parameter of the aerova lve is acquired. Finally the conclusion shows that the detonation wave is more e asily formed in the tube using combined aerovalve compared with the blunt body, thus it can increase the combustion pressure and the flame velocity setting with a smaller inner diameter of the cover.