中文摘要：

为了解自激吸气式脉冲射流装置在围压作用下的脉冲效果及腔体内压力的变化规律,利用自主研发的水下射流装置平台开展试验研究,分析了不同围压时装置在不吸气和吸气条件下的冲击力、频率特性及腔体内压力的变化规律。结果表明：围压对装置射流冲击力衰减影响较大,相同靶距时高围压的冲击力衰减较快;装置吸气后射流冲击力的频率比不吸气低,但振幅变大;围压对不吸气和吸气条件下腔体内的压力影响规律相同,测点压力均随着围压增大而减小,而在同一围压条件下吸气后腔体内测点压力变大。

英文摘要：

In order to insight into the pulse effect and the pressure variation law in chamber of the self-excitation inspiration pulsed jet inconfining pressure,self-excitation inspiration pulsed jet nozzle was used by experiment and the variation law of impact force, pressure inchamber, frequency characteristic in non-inspiration and inspiration were analyzed. The results show that the confining pressure has a greateffect on impact force attenuation and it is a greater impact in high confining pressure. The self-excitation inspiration pulsed jet＇ frequency ininspiration is less in non-inspiration,but higher in amplitude. The confining pressure has the same effect on inspiration and non-inspiration.As for the same conditions, the pressure of typical measurement point is decreased as confining pressure increases, but the condition ofinspiration is higher than that of non-inspiration at the same confining pressure.