基于Fluent巷道断面平均风速点定位监测模拟研究
Simulation study on monitoring and measuring location of average air velocity in section of mine roadway based on Fluent
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摘要: 为了确定与巷道断面内平均风速相适应的风速传感器的安设位置,以保证巷道风量监测的准确性,利用Fluent软件在不同巷道类型、不同断面尺寸、不同风速的条件下,对24个矿井巷道模型的风流场进行了三维数值模拟,确定了巷道断面中轴线上与平均风速相等的点位,并得到了该点位置与巷道断面的关系,其中矩形巷道该点位置至顶板距离为巷道高度的11%~12%,半圆拱形巷道该点位置至顶板距离为巷道高度的15%~16%;同时,给出了平均风速位置查询表格和计算公式,并与实测结果比较,发现风速数据基本吻合,为矿井利用风速传感器准确监测巷道风量提供了有力保障。Abstract: In order to confirm installation location of air velocity sensor adaptive to average air velocity in section of mine roadway and to ensure the accuracy of air Vo lume monitored and measured in the mine roadway, Fluent software was applied to the three dimensional numerical simulation on the air flow fields of 24 mine roadway mo dels under different mine roadway type,different section size and different air velocity condition. The point location where average air velocity was equal to the central axial line in the section of the mine roadway was established and the relationship between the point location and the mine roadway section was summarized. The distance to roo f from the point location of the mine rectangle roadway would be 11% ~ 12% of the mine roadway height and the distance to the roof from the point location of half arch roa dway was 15% ~ 16% of the mine roadway height. Meanwhile,a search table and calculation formula of the average air velocity was provided and in comparison with site m easured results,the air velocity data could be ftted basically and could provide powerful protection to the air velocity sensor applied to accurately monitor and measure the air flow volume of the mine roadway.
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