Underwater explosion bubble pulsation characteristics of low energy detonating cord

In order to study the bubble pulsation characteristics of low energy detonating cord, an underwater explosion experiment was carried out by high-speed photography technology. The experimental results show that the bubble pulse shape in the shooting section remains a clindricality at the first bubbles pulsing time, and irregular cylinder from the second bubbles pulsing time. The outside edge of bubbles is blurry because of the effect from shell fragments. The first bubble pulsation period is 21.5 ms and the second is 15.5 ms. The maximum diameter of bubble is 11.2 cm in the first bubble pulsation period. In addition, the bubble growth time is 15 ms while the contraction time is 6.5 ms in the first bubble pulsation period. The bubble growth time is longer than the contraction time. ©, 2015, Institute of Chemical Materials, China Academy of Engineering Physics. All right reserved.