有限空间的尘浓度分布规律数值模拟研究  

Numerical Simulation of Dust Concentration Distribution in Confined Space

作　　者：徐陈又诗 张合[1] 查冰婷[1] 郑震 陈璟宜 XU Chenyoushi;ZHANG He;ZHA Bingting;ZHENG Zhen;CHEN Jingyi(Ministerial Key Laboratory of ZNDY, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China;School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China)

机构地区：[1]南京理工大学智能弹药技术国防重点学科实验室,江苏南京210094 [2]南京理工大学机械工程学院,江苏南京210094

出　　处：《兵工学报》2020年第3期618-624,共7页Acta Armamentarii

基　　金：武器装备预先研究项目(41419070203);中央高校基本科研业务费专项项目(30918012201)。

摘　　要：针对激光引信抗尘干扰能力研究问题,提出一种尘实验室设计方案。在实验室条件下形成一个浓度均匀且可调节的尘实验平面,进而对激光引信抗尘干扰能力进行定量分析。采用k-ε湍流数学模型和离散相模型,基于混合差分格式和同位网格的压力耦合方程组半隐式方法,利用计算流体力学软件Fluent对尘实验室进行数值模拟,得到计算域内不同截面的尘浓度分布情况和浓度随时间的变化趋势。结果表明:尘平面均匀浓度受鼓风口风速和鼓料口质量流率的影响,与风速呈线性规律增长,与质量流率呈指数规律衰减;自然风可以加快尘的沉降速度。A dust laboratory design scheme is presented for the research on the anti-dust interference ability of laser fuze.An adjustable dust test plane with uniform concentration is formed under laboratory conditions,and then the anti-dust interference ability of laser fuze is quantitatively analyzed.The k-εturbulent mathematical model and the discrete phase model(DPM)is established,and the dust laboratory is numerically simulated by computatinal fluid dynamcs FLUENT software based on the semi-implicit method of pressure linked equations(SIMPLE)with hybrid difference scheme and co-located grid.The distributions of dust concentration in different cross sections of the computing domain and the trend of concentration over time can be obtained through simulation.The results indicate that the uniform concentration of dust is affected by the wind velocity of the wind inlet and the mass flow rate of the feed inlet,and the uniform concentration grows linearly with the wind velocity while decays exponentially with the flow rate.And the natural wind can speed up the sedimentation speed of dust.

关 键 词：激光引信 尘实验室 尘浓度分布 有限空间 气体与固体两相流 数值模拟 

分 类 号：TJ43+9.2[兵器科学与技术—火炮、自动武器与弹药工程]