煤矿安全2023，Vol.54Issue(12)：40-47,8.DOI:10.13347/j.cnki.mkaq.2023.12.007
综掘工作面外喷雾喷嘴布置方式数值模拟研究
Numerical simulation research on arrangement of spray nozzles outside fully mechanized excavation face
摘要
Abstract
Aiming at the problem of poor spray continuity between the external spray nozzles of the wet dust removal system in the fully mechanized excavation face,the numerical simulation study of the nozzle arrangement was carried out.Firstly,by constructing a gas-liquid two-phase mathematical model,the velocity distribution and force state of the droplets are deduced;then,the geometric model of the fully mechanized tunnel is constructed,and based on the fluid dynamics analysis software Fluent,the state of the droplets in the wind-mist coupled flow field in the tunnel is calculated.Numerical simulations were carried out to study the effects of the number of nozzles and the position of nozzles on the physical properties of the droplets.The results show that the change of the number of nozzles has little effect on the distribution of small particle size droplets in the roadway,which are mainly distributed on the roadway wall and near the nozzle position.With the increase of the number of nozzles,the number of large-diameter droplets in-creases significantly,but the kinetic energy of each nozzle decreases and the diffusion distance shortens.When the spacing between the nozzles at the upper end of the spray rack is 80 mm,a more uniform and dense arc-shaped spray barrier is formed.The nozzles at the corner of the spray rack are arranged at a right angle for the best atomization uniformity.When the spacing is 110 mm,the distri-bution of droplets is the best.关键词
综掘工作面/风雾耦合/喷嘴数量/雾滴分布/喷嘴布置Key words
fully mechanized excavation face/wind and mist coupling/number of nozzles/droplet distribution/nozzle arrangement分类
矿业与冶金引用本文复制引用
杨骁禹,王义亮..综掘工作面外喷雾喷嘴布置方式数值模拟研究[J].煤矿安全,2023,54(12):40-47,8.基金项目
山西省自然科学基金资助项目(201901D111055) （201901D111055）
