Analysis of temporal and spatial distribution characteristics of ammonium chloride smoke particles in confined spaces

作     者：Chen-youshi Xu Bing-ting Zha Jia-qian Bao He Zhang Hong-xia Li Chen-youshi Xu;Bing-ting Zha;Jia-qian Bao;He Zhang;Hong-xia Li

作者机构：ZNDY of Ministerial Key LaboratoryNanjing University of Science and TechnologyJiangsuNanjing210094China 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2022年第18卷第7期

页      面：1269-1280页

核心收录：

学科分类：082601[工学-武器系统与运用工程] 08[工学] 0804[工学-仪器科学与技术] 0826[工学-兵器科学与技术] 0835[工学-软件工程] 

基　　金：the Central University Special Funding for Basic Scientific Research(Grant No.30918012201) the Foundation of JWKJW Field(Grant 2020-JCJQ-JJ-392) the Postgraduate Research&Practice Innovation Program of Jiangsu Province(Grant No.KYCX20_0315) 

主　　题：Laser fuze Smoke environment Temporal distribution Spatial distribution Confined space Smoke agent 

摘      要：In response to the demand for short-range detection of anti-smoke environment interference by laser fuzes,this study proposes a smoke environment simulation of non-uniform continuous point source diffusion and investigates an experimental laboratory smoke environment using an ammonium chloride smoke *** particle size distribution,composition,and mass flow distribution of the smoke were *** on a discrete phase model and a k
εturbulence model,a numerical simulation was developed to model the smoke generation and diffusion processes of the smoke agent in a confined *** temporal and spatial distribution characteristics of the smoke mass concentration,velocity,and temperature in the space after smoke generation were analyzed,and the motion law governing the smoke diffusion throughout the entire space was *** with the experimental verification of the smoke environment laboratory,the results showed that the smoke plume changed from fan-shaped to umbrella-shaped during smoke generation,and then continued to spread ***,the mass concentration of smoke in the space decreased from the middle outward;the changes in temperature and velocity were small and *** the diffusion stage(after 900 s),the mass concentration of smoke above 0.8 m was relatively uniform across an area of smoke that was 12 m *** concentration decreased over time,following a consistent decreasing trend,and the attenuation was negligible in a very short ***,this system was suitable for conducting experimental research on laser fuzes in a smoke *** to the stability of the equipment and facilities,the setup could reproduce the same experimental smoke environment by artificially controlling the smoke emission of the smoke ***,this work provides a theoretical reference for subsequent research efforts regarding the construction of uniform smoke environments and evaluating laser transmission characteristics in smoky envir