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为解决煤矿喷雾降尘效率低和喷雾用水量大易造成巷道水害问题,依据气液两相流理论,应用Fluent软件对雾滴在不同喷嘴压力作用下粒径分布和运移规律进行数值模拟,得到雾粒浓度和粒径分布情况。研究表明:喷雾压力影响雾粒的分布范围。压力过大,雾粒在巷道内的分布面积逐渐减小。同一喷嘴压力下雾粒粒径分布不均匀,在横截面上呈现中间粒径小,两边粒径大的规律。当喷雾压力为3 MPa时,雾粒的分布利于降尘且距喷嘴2.8 m处雾化效果最好。
In order to solve the problem of low spray dust efficiency and high spraying water in coal mines, it is easy to cause roadway water damage. Based on the theory of gas-liquid two-phase flow, Fluent software is used to simulate the particle size distribution and migration rule of the droplet under different nozzle pressure. Fog particle concentration and particle size distribution. Research shows that spray pressure affects the distribution of fog particles. Pressure is too large, the distribution of fog particles in the roadway gradually reduced. Under the same nozzle pressure, the fog particle size distribution is not uniform, and the cross section shows a small particle size on the middle and a large particle size on both sides. When the spray pressure is 3 MPa, the distribution of fog particles is conducive to dust reduction and the atomization effect is best at 2.8 m from the nozzle.