关键词: 烟幕 , 凝聚粒子 , 光散射 , 消光 , 吸收

Abstract: 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.

Key words: smokescreen , cluster particle , light scattering , extinction , absorption