摘要
采用蒙特卡洛方法根据凝聚体 -凝聚体凝聚模型对由球形原始粒子聚集成的凝聚粒子的结构进行仿真 ,按T矩阵方法计算各种结构的消光和吸收系数 ,然后取所有结果的平均值来仿真实际情况烟幕凝聚粒子的消光特性。以碳黑为例的计算结果表明 :凝聚粒子的消光特性受到原始粒子数量、粒径以及结构的影响 ;粒子的凝聚将减弱烟幕的消光性能 ;当凝聚结构中原始粒子的数目一定时 。
Cluster-cluster aggregation (CCA) model based on Monte Carlo method is used to simulate the structure of the cluster particles in a smokescreen, and the extinction coefficients and absorption coefficients of the simulated cluster structures are calculated based on the T matrix method. Average values of the above coefficients are used to simulate the extinction properties of the actual smokescreen. Results from carbon black clusters show that extinction is determined by the structure, radius and number of primitive particles besides the refractive index, and that the extinction properties can be decreased by an aggregation process. For a given primitive particle number, maximum extinction is obtained by the cluster with optimum radius of primitive particles.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2002年第2期184-187,共4页
Acta Armamentarii
关键词
凝聚粒子
光散射
消光
吸收
烟幕弹
smokescreen, cluster particle, light scattering, extinction, absorption
