爆炸冲击波作用下液体抛撒不同阶段运动规律分析

Study on Specialty of Liquid Dispersal with Blast

文章通过对采用高速摄影仪拍摄的爆炸冲击波作用下不同时刻液体抛撒运动图片的分析,得出了爆炸冲击波作用下液体抛撒不同阶段的运动规律。分析表明爆炸冲击波作用下,液体抛撒不同阶段有不同的特点,抛撒初期液体处于加速阶段并在较短的时间内获得最大速度,获得最大速度的液体由于表面张力、空气阻力及粘性的作用产生首次破碎与二次破碎,此阶段液体抛撒速度随时间呈指数关系衰减,二次破碎后的液滴由于仅受空气阻力的作用,受力形式发生改变,速度衰减减慢。

With the help of the high-speed CCD camera,the whole history of liquid dispersal movement variety with time is obtained.Through analysis,specialty of liquid dispersal with blast in different phase is discussed. The result is drawn that liquid dispersal with blast has different specialty in different phase of liquid dispersal at the first,the velocity of dispersal liquid is increased and obtained maximum velocity,Then the breakage of liquid is produced because of surface tension, air resistance etc.In this period,velocity of dispersal liquidi is approximately exponential attenuatioin with time.After secondary breakage,the dispersal liquid has only the affection of air resistance;the velocity attenuation is very slow.