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露天采矿飏尘扩散防治用风障的模拟分析

Keywords: 风障,防护林,露天采矿尘源,数值模拟

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Abstract:

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=0.2h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4h’时,相对风速约为初始风速的30%。

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