摘要
为了推动爆炸气泡帷幕减震技术的研究,揭示低能量导爆索水下爆炸气泡脉动规律,采用高速摄影系统对水平和竖向放置的单根及两根低能量导爆索水下爆炸气泡脉动特性进行了实验研究,得到了其不同放置方式下的气泡脉动特性。结果表明,水平放置单根低能量导爆索水下爆炸首次气泡脉动形状保持圆柱形,第一次气泡脉动周期为11.5 ms,最大直径为6.9 cm;水平放置两根低能量导爆索第一次气泡脉动周期为14 ms,22 ms时两气泡开始相互融合,形成一气泡帷幕层,比单根水平放置低能量导爆索第一次气泡脉动周期长。竖向放置两根低能量导爆索第一次气泡脉动周期为27.5 ms,比单根低能量导爆索第一次气泡脉动周期长,79.5 ms时形成完全融合的气泡帷幕,323 ms时该气泡帷幕仍清晰可见。将低能量导爆索竖向布置缠成网状,气泡脉动持续时间长,有利于爆炸气泡帷幕的形成。
To promote the research on curtain damping technology of explosion bubble and reveal the pulsation rule of underwater explosion bubble with low energy detonating cord（ LEDC）, an experimental research on the pulsation characteristics of under, water explosion bubble with single or two horizontal and vertical placed LEDC was carried out by a high-speed photography system. The pulsation characteristics of bubble under different placement of LEDC were obtained. The results show that the shape of the bubble pulsation at the first time is cylindrical when the single horizontal LEDC is exploded under water. The first period of the bubble pulsation is 11.5 ms, and the maximum diameter reaches to 6.9 cm. Under the conditions of two horizontal LEDC, the first peri- od of the bubble pulsation is 14 ms and two bubbles begin to merge with each other and form a bubble curtain layer at22 ms. The first period of the bubble pulsation of two horizontal LEDC is longer than that of one horizontal LEDC. Under the conditions of two vertical LEDC, the first period of the bubble pulsation is 27.5 ms. The first period of the bubble pulsation of two vertical LEDC is also longer than that of one vertical LEDC and a fully integrated bubble curtain is formed at 79.5 ms which is still visible at 323 ms. When the vertical placed LEDC are wrapped into a network, the bubble pulse duration is longer, and it was conducive to the formation of the explosion bubble curtain.
出处
《含能材料》
EI
CAS
CSCD
北大核心
2016年第4期393-397,共5页
Chinese Journal of Energetic Materials
基金
国家自然科学基金项目(11202109
11304168)
河南省高等学校青年骨干教师资助计划(2013GGJS-157)
河南省教育厅自然科学研究计划项目(2011B130002)
南阳师范学院高层次人才资助项目
关键词
低能量导爆索
水下爆炸
气泡脉动
高速摄影
low energy detonating cord（LEDC）
underwater explosion
bubble pulsations, high speed photography
