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出 处:《含能材料》2009年第3期317-320,325,共5页Chinese Journal of Energetic Materials
摘 要:由于边界效应,装药爆炸时表层将产生残留物颗粒。为了对残留物颗粒的飞散运动及分布规律进行理论分析,利用球形颗粒一维稀疏二相流动力学模型,研究得到炸药残留物颗粒的速度衰减及水平飞散距离计算公式;在此基础上,建立了以某粒径残留物颗粒水平运动极限距离为半径的炸药残留物颗粒球面空间分布简化理论模型。利用此简化模型,首次从理论上分析了近似自由空爆条件下炸药残留物在水平方向的分布规律。分析结果表明:炸药爆炸残留物颗粒在水平方向的质量分布密度先随距离的增加而增大至某一峰值后再随距离的增加而降低。此结果与实验现象基本相符,可作为对试验现象的一种理论解释。A simplified theoretical model was introduced for predicting distribution characteristic of explosive residue in horizontal orignating from surface layer of charge because of border influence. With the theoretical model of spherical grain dynamics of sparse two-phase flow in single dimension, computing formulas of velocity's attenuation and scattering distance were built for explosive residue grains in horizontal. Then, a simplified theoretical model on distribution of explosive residue was put forward on the basis of a spherical space with radius equalling to maximum horizontal scattering distance of explosive residue grains with certain diameter. With this model, the distribution characteristics in horizontal of explosive residue grains were theoretically analyzed under condition of explosion in air. Results show that there exists a maximum value of scattering distance in horizontal for explosive residue grains with certain diameter, and the density of mass distribution of explosive residue firstly increases with incraesing of distance to a maximum value and then decreases with increasing of distance. Theoretical result basically matchs the phenomena of distribution of explosive residue in experiments.
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