水中爆炸形成水射流现象的实验研究

Water jet phenomena caused by underwater explosions

针对水中爆炸气泡脉动水射流现象,应用开尔文冲量原理,分析了水中爆炸产生的气泡与固壁相互作用形成水射流现象的主要影响因素,开展了气泡与竖直放置的钢板相互作用产生水射流现象的实验研究工作。通过改变炸药到钢板的距离,得到气泡和钢板相互作用形成水射流的动态过程图像和水射流形成后的气泡二次脉动压力。理论分析和实验结果均表明:随着爆距的减小,Bjerknes力迅速增加,气泡与钢板相互作用形成的水射流逐渐垂直于钢板壁面.水射流具有非常明显的方向性,对目标毁伤作用明显.

To study the phenomena of water jet formation during bubble oscillation,the major factors affecting water jets produced when bubbles from underwater explosions interact with a vertical rigid steel plate were analyzed using Kelvin＇s impulse principle.An experimental study of the water jet phenomenon was carried out in a water tank,testing the effects of changes in the distance between the explosion and the steel plate.Pictures of bubbles creating water jets were captured by a high speed camera.Bubble pulse pressure was captured by a pressure sensor.The results of theory and experimental study showed that the Bjerknes force rapidly increased with decreasing of the distance between the explosive and the steel plate,the water jet caused by the interaction between bubble and steel plate eventually is perpendicular to the steel plate.The water jet has obvious directivity and can severely damage to the target was clearly a result of orientation.