水幕衰减爆炸冲击波数值研究

Attenuation of shock wave passing through water curtain

舰船上发生爆炸时,将对舱室设备、舰上人员造成严重伤害,在舱室内喷洒细水雾形成水幕是冲击波防护的有效措施之一。为了分析水幕对爆炸冲击波的衰减作用,建立冲击波在布置有水幕的舱室中传播的模型,采用Eulerian-Lagrangian方法描述冲击波与水雾颗粒的两相流动,考虑液滴碰撞、破碎、蒸发等因素的影响。计算结果表明,水幕可有效衰减冲击波的超压峰值,并对波后气体有明显的降温效果。

The explosion in the cabin of a ship will cause serious damage to equipment and person.It′s one of the effective measures to weaken shockwave by water curtain.In order to analyze attenuation of shockwave,setting the model of shockwave passing through the cabin with water curtain,the Eulerian-Lagrangian method was used to demonstrate the shockwave-droplet two-phase flow phenomena,and the influence of droplets collision、break up and evaporation are considered.The results show that the water curtain has obvious cooling effect on shockwave and can effectively weaken the peak of overpressure.