小当量水中爆炸气泡的脉动现象

Bubble pulses of small-scale underwater explosion

为研究水中爆炸气泡的脉动现象,设计了用于小当量(≤10 g TNT)水中爆炸研究的爆炸水箱,在爆炸水箱装置中进行了多次0.125、1.000、3.370、8.000 g TNT当量的PETN球形炸药水中爆炸试验。采用高速摄影系统获得了气泡脉动图片;给出试验范围内气泡脉动过程中气泡直径、速度及加速度随时间变化的拟合曲线。对气泡脉动直径和周期数据进行了分析,这些数据基本符合爆炸相似律。

A water tank was designed to explore bubble pulses of underwater explosion. In the designed water tank, small-scale underwater explosion tests were conducted for different TNT-equivalent PETN charges of 0. 125, 1. 000, 3. 370, 8. 000 g. After explosion of the PETN charge, bubble pulses were obtained by a high-speed camera system. Variation of the bubble diameter, expanding and contracting velocities, and expanding and contracting accelerations with time was achieved in the bubble pulse process under the given experimental conditions. The data of the bubble diameter and pulse period were analyzed. These data for bubble pulse obtained in this research accord approximately with a similarity rule.