中文摘要：

针对自激吸气式脉冲射流装置的脉冲效果及其产生原因,开展装置冲击试验,测量装置腔体上典型测点压力和靶心冲击力时间历程,运用高速摄像技术观测装置内部水气流动过程,分析不同结构参数和运行参数下典型测点压力与冲击力脉冲效果,研究吸气量、典型测点压力和冲击力时间历程与水气流动过程之间的关系。研究结果表明：腔长、下喷嘴直径、工作压力和围压对吸气量有明显的影响;腔长和下喷嘴直径对碰撞体测点压力和冲击力脉冲效果均有较大影响,存在着最佳结构参数使装置吸气量、冲击力时均值最大且脉冲效果最好;工作压力、围压和吸气对冲击力时均值及其脉冲效果影响较大;装置吸气后腔内形成了气水旋转涡团,气水旋转涡团与吸气量、碰撞体测点压力和冲击力时间历程存在着明显的对应关系。

英文摘要：

Aimed at the pulse effect and reason of the self-excited inspiration pulse jet device, the impact test of device was conducted. The time-varying process of typical measuring points pressure and target center impact were measured. The water-gas flow process inside the device was recorded with a high-speed digital camera. The pulse effect of typical measuring point pressure and impact was analyzed under different structural and operation parameters. The relationship between the water-gas flow process and the time-varying process of inspiration capacity, collision-body measuring point pressure and impact was studied. The results showed that cavity length, nozzle diameter, working pressure and confining pressure have obvious influence on inspiration capacity. Cavity length and under nozzle diameter have significant influence on pulse effects of collision-body measuring point pressure and impact, and there are optimal structure parameters that make inspiration capacity, impact time-averaged value maximize and pressure pulse effect best. Working and confining pressure have greater influence on the time-averaged impact value and pulse effect. The gas-water rotating vortex inside the cavity is formed after inspiration. There exists obvious corresponding relation between the gas-water rotating vortex and the time-varying process of inspiration capacity, collision-body measuring point pressure and impact.