基于LBM-CA方法的煤矿输送带喷雾降尘仿真  

Simulation of Spray Dust Reduction for Coal Mine Conveyor Belt Based on LBM-CA Method

作　　者：宋小鹏 王斌武 吴国珊 朱辉[1] Song Xiaopeng;Wang Binwu;Wu Guoshan;Zhu Hui(School of Energy and Building Environment,Guilin University of Aerospace Technology,Guilin 541004,China)

机构地区：[1]桂林航天工业学院能源与建筑环境学院,广西桂林541004

出　　处：《煤矿机械》2021年第7期206-207,共2页Coal Mine Machinery

基　　金：广西自然科学基金(2017GXNSFAA198184,2018GXNSFAA281306);广西壮族自治区中青年教师基础能力提升项目(2018KY0655)。

摘　　要：为研究煤矿输送带喷雾降尘的动态过程,基于Lattice-Boltzmann(LBM)方法,探讨了喷雾降尘过程的粉尘堆积形貌、流场及捕集率。首先使用LBM仿真并验证了液滴绕流,接着注入粉尘颗粒,计算粉尘的运动轨迹及其在液滴表面的沉积。结果表明:颗粒物堆积形貌在一定条件下呈枝簇结构,且枝簇结构朝与来流相反的方向生长;大粒径粉尘在液滴表面的沉积对流体流动有显著影响;速度小或半径小的粉尘,其受布朗力影响明显,可能在液滴背风面上沉积;粒径大的颗粒容易在液滴迎风面上沉积。To study the dynamic process of spray dust reduction for coal mine conveyor belt, the dust deposit morphology, flow field and capture efficiency have been discussed based on Lattice-Boltzmann(LBM) method. Firstly, the flow around the droplet have been simulated and verified by LBM, then dust particles were injected, and the trajectories of particles and deposition on the droplet surface have been calculated. The results show that the morphology of the dust matter is in a branch-cluster structure under certain conditions, and the branch-cluster structure grows in the opposite direction to the incoming flow. The deposition of large-size dust on the surface of the droplet has a significant influence on the fluid flow. Dust with low velocity or small radius suffer obvious Brownian force and may deposit on the leeward surface of the droplet. Dust with large radius are easy to deposit on the windward surface of the droplet.

关 键 词：LBM CA 喷雾降尘 数值模拟 

分 类 号：TD528.1[矿业工程—矿山机电] TD714.4