摘要
基于某露天矿坑飏尘防治用风障工程,建立数学物理模型进行数值模拟探究风障(含人工风障和防护林带)对大型露天矿坑飏尘的防护效果。运用计算流体动力学软件Fluent并选取高雷诺数下k-ε模型用SIMPLE算法进行计算,得到风障周围的流场及压力场的分布,从而分析人工风障和防护林带后沿流水平距离变化时不同高度间相对风速的变化,得出位于人工风障后位置越低,防护效果越强,当y=0.2 h时,约为初始风速的50%,且当气流深入林带后其防护效果增强,在进入后水平距离4 h’时,相对风速约为初始风速的30%。
Selecting an open pit mine for the case study sample to prevent from,shelter or reduce the fugitive dust emissions,we established a physical model for artificial windbreak and shelter belt and did numerical simulations so as to analyze their shelter effects,by the use of the computational fluid dynamics software known as Fluent.The simulations were developed on the basis of SIMPLE algorithm,on the k-ε model under high Re to enclose the general control equations.In this simulation,it shows that the change of relative wind velocity and pressure drop,when the wind goes through the simulated zone.To be exact,it is possible to predict the change of relative wind speed on different heights（0.2,0.4,0.6 and 0.8 h） and different horizontal levels of the windbreak and shelter belt.So the nearer to the land surface behind the windbreak,the better the shelter effect.Particularly at the height（y=0.2 h）,the flow speed after windbreak is only 50% of the initial wind speed.Besides,protecting effect is likely to rise when the wind penetrates shelter belt,especially at x=4 h＇,to the entrance of shelter belt,wind speed tends to drop to 30% of initial value.
出处
《环境工程学报》
CAS
CSCD
北大核心
2012年第11期4153-4156,共4页
Chinese Journal of Environmental Engineering
基金
中国黄金集团2011年科研计划项目(中金科技函[2011]80号)
关键词
风障
防护林
露天采矿尘源
数值模拟
windbreak
shelter belt
open pit particle source
numerical simulation
