论文部分内容阅读
基于某露天矿坑飏尘防治用风障工程建立数学和物理模型,探究风障结构参数对风障庇护效果的影响。运用正交试验原理和计算流体动力学软件Fluent对不同风障高度h、风障倾角α和风障厚度d的27组风障工况进行试验,并选取风障后相对平均风速及风障阻力作为考察指标,对试验结果进行直观分析及方差分析,得到不同风障结构因素对其庇护效果影响的显著性大小排序:风障厚度、风障倾角、风障高度。给出了优化型风障并分析了其后沿流水平距离变化时不同高度间相对风速的变化,得出在开孔率和高度相同时,直立风障的庇护效果与风障阻力和风障厚度呈正相关,并当厚度大于12.5mm时,风障庇护效果缓慢增强,风障阻力却迅速增大。
The mathematical model and physical model are established based on the wind barrier project of the prevention and control of dust in an open pit, and the influence of the wind barrier parameters on the shelter effect of the wind barrier is explored. 27 sets of wind-fault conditions under different wind-barrier height h, wind-dip obliquity α and wind-barrier thickness d were tested by orthogonal experimental principle and computational fluid dynamics software Fluent. The relative average wind speed and wind-barrier resistance were selected as The indexes were analyzed and the test results were analyzed visually and analyzed by variance. The order of significance of different factors of wind-damp structure on the sheltering effect was obtained: wind-fault thickness, wind-induced dip and wind-induced height. The optimal wind-induced disturbance is given and the change of relative wind velocity between different heights along the horizontal flow-edge changes is analyzed. The results show that the shelter effect of the vertical wind-breaker is similar to that of the wind-induced obstacle and the thickness of the wind- And when the thickness is more than 12.5mm, the effect of wind barrier sheltering is slowly increased, and the wind resistance is rapidly increasing.