摘要
在实验水箱中采用高速摄影技术获得了炸药水中爆炸气泡脉动过程图像。实验结果表明:短长径比(1.05)PETN炸药水中爆炸产生的气泡形状近似球形,气泡脉动周期和半径随炸药质量的增加而增大。在膨胀阶段,气泡中心位置保持不变,随着体积的不断缩小,气泡上浮越来越明显。受重力影响,气泡下表面收缩速度高于上表面,在收缩至最小时下表面向上冲顶,气泡溃灭形成水射流。
Dynamics of bubble oscillation formed during underwater explosions were studied in a water tank. The expansion and collapse of the bubble pictures created by the explosion of the short lengthdiameter ratio（1.05） PETN were captured by a high-speed camera. The geometry of the bubble is approximately spherical. The radius and period of oscillation of the bubble increment with the charge weight. The position of the bubble is almost constant during its expansion, but when the bubble is growing smaller, the bubble rises more distinctly. The contract velocity in the bottom of bubble is faster than that of the up surface caused by the influence of gravity; a water jet was formed at the last stages of the bubble collapse.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2008年第6期572-576,共5页
Explosion and Shock Waves
基金
国家安全重大基础研究基金项目(51335010202)
中国工程物理研究院科学技术基金项目(20060101)
关键词
爆炸力学
气泡脉动
水中爆炸
水射流
mechanics of explosion
bubble oscillation
underwater explosion
water jet
