粒径对烟幕中团聚体颗粒散射特性的影响分析

doi:10.3969/j.issn.1000-1093.2020.05.017

兵工学报 ›› 2020, Vol. 41 ›› Issue (5): 975-983.doi: 10.3969/j.issn.1000-1093.2020.05.017

粒径对烟幕中团聚体颗粒散射特性的影响分析

周梦得^1,2，李佳玉^1,2

（1.南京理工大学能源与动力工程学院, 江苏南京 210094; 2.电子设备热控制工业信息化部重点实验室，江苏南京 210094)

收稿日期:2019-06-26 修回日期:2019-06-26 上线日期:2020-07-17
通讯作者: 李佳玉（1981—），女，副教授，硕士生导师 E-mail:lijiayu@njust.edu.cn
作者简介:周梦得(1994—),男,硕士研究生。E-mail: 914831019@qq.com
基金资助:
国家自然科学基金项目(51476078)

Analysis of the Scattering Properties of Aggregate with Random-sized Particles in Smoke Screen

ZHOU Mengde， LI Jiayu

（1.School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China;2.Key Laboratory of Electronic Equipment Thermal Control of Ministry of Industry and Information Technology, Nanjing 210094, Jiangsu, China)

Received:2019-06-26 Revised:2019-06-26 Online:2020-07-17

摘要/Abstract

摘要： 以烟幕中颗粒团聚现象为背景，针对烟幕中的团聚体的消光性能优化问题进行了研究。基于Cluster-Cluster Aggregation理论建立了随机粒径的团聚体算法程序，用于生成具有不同颗粒半径的团聚体模型；在此模型基础上运用多球T矩阵方法计算分析了烟幕中粒径呈对数正态分布的团聚体散射特性；同时结合具体的物理模型研究分析了粒径的分散程度对团聚体消光因子、散射因子及散射能量分布的影响。结果表明：团聚体中颗粒粒径分散程度的降低会提高烟幕的消光性能；模拟的多组团聚体中，A型团聚体较B型团聚体消光因子提高了30.9%，总体散射能量降低了32.5%；团聚体中尽量避免出现偏离对数正态分布均值的极大粒径颗粒可以有效地提高烟幕团聚体的消光性能。

关键词: 烟幕, 团聚体颗粒, 散射特性, 多球T矩阵, 相函数

Abstract: The optimization of extinction performance of particles in smoke screen is studied based on the phenomenon of particle agglomeration in smoke screen. Based on the theory of cluster-cluster aggregation (CCA), the algorithm program of aggregates with random particle size is established to generate the aggregates composed of different sized particles. On the basis of this model, multi-sphere T matrix (MSTM) method is used to calculate and analyze the scattering properties of the aggregates, of which monomer size follows a lognormal distribution of particles in the smoke screen. The results show that the extinction performance of the aggregate is weakened with the increase in particle size dispersion. In the simulated multi-group aggregate particles, the extinction factor of type A aggregate is increased by 30.9% compared with that of type B aggregate, and the overall scattering energy is decreased by 32.5%. The extinction performance of the aggregate in smoke screen can be effectively improved by avoiding an extremely large size monomer particle which size deviates from the mean of lognormal distribution of particles in the aggregates. Key

Key words: smokescreen, aggregateparticle, scatteringproperty, multi-sphereTmatrix, phasefunction

中图分类号:

周梦得，李佳玉. 粒径对烟幕中团聚体颗粒散射特性的影响分析[J]. 兵工学报, 2020, 41(5): 975-983.

ZHOU Mengde， LI Jiayu. Analysis of the Scattering Properties of Aggregate with Random-sized Particles in Smoke Screen[J]. Acta Armamentarii, 2020, 41(5): 975-983.

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粒径对烟幕中团聚体颗粒散射特性的影响分析

Analysis of the Scattering Properties of Aggregate with Random-sized Particles in Smoke Screen

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