煤矿主风机分支管路对风门湿度的影响

Effect of coal mine main fan branch pipeline on damper humidity

为研究煤矿主风机分支管路参数对风门结霜的影响,采用实验与模拟方法分析管路结构及泄露情况对风门壁面相对湿度的影响,利用FLUENT软件模拟由正交分析方法所确定的分支管路模型的压力与湿度分布的关系。结果表明:实验与模拟误差在7.7%以内,随着泄漏口宽度、斜管长度,以及斜管夹角的增加,风门壁面的相对湿度呈下降趋势;当直管长度为165 mm时,风门壁面相对湿度最大。优选分支管路的风门壁面最大相对湿度为64%,风门壁面未发生结霜。该研究为改善风门结霜现象提供了参考依据。

This paper is aimed at reducing the impact of coal mine fan branch pipe parameters on damper frosting. The reduction follows from using experiment and simulation to analyze the effect of pipe- line structure and leaks on relative humidity of damper surface, and applying FLUENT software to simu- late the relationship between the pressure and humidity distribution in branch pipe model, as determined by orthogonal analysis method. The results suggest that there occurs an error of within 7.7% between the experiment and simulation; an increase in leak width, inclined pipe length, and inclined pipe angle trig- gers a reducing trend in relative humidity of the damper surface ; the straight pipe length of 165 mm pro- vides the maximum relative humidity of damper surface; and the optimal maximum relative humidity of 64% in branch pipe of damper surface affords the freedom from frost in damper surface. This study may provide references for improving the frosting of damper surface.