炸药爆炸残留物颗粒飞散运动过程的简化分析

Simplified Analysis on Scattering Motion of Explosive Residue Grains

采用空气流场中的球形颗粒一维稀疏二相流动力学模型对具有初始飞散速度的炸药残留物颗粒在空气中的受力情况及运动过程进行分析,获得了炸药残留物颗粒的速度衰减及水平飞散距离公式。对公式的定性分析结果表明,在初始抛散速度相等的前提下得出:(1)颗粒粒径越大的残留物其在水平方向的抛散速度衰减越慢,抛散距离也越远,但都存在一个水平分布极限距离xm ax(ds);(2)密度越大的炸药,其残留物水平方向分布区域越远;(3)炸药残留物颗粒水平方向的运动特性与炸药量无关。

Forces on grains of explosive residue and grains′motion in air were analyzed with the theoretic model of spherical grain dynamics of sparse two-phase flow in single dimension.Expressions describing velocity′s attenuation and distance scattering in horizontal of explosive residues grains were established.Qualitative analysis on the expressions indicated that under equal scattering velocity condition：（1） the bigger the explosive residue grains,the slower the horizontal scattering velocity and the farther the distribution distance,but a limit of horizontal distribution distance is existed;（2） the larger the explosive density,the farther the horizontal distribution distance;（3） the characteristic of horizontal motion of explosive residue grains has nothing to do with quantity of explosive.