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为了降低空气幕的能耗,依据空气动力学理论,建立了以双三次方曲线为整流器外轮廓线的矿用空气幕模型,采用正交模拟试验方法,以出风口速度分布均匀性及阻力损失为评价指标,研究了不同结构参数下矿用空气幕内流场分布规律,计算出矿用空气幕出风口断面的速度分布均匀性参数及压力损失,得到了最优的矿用空气幕结构模型,该模型风流速度均匀性参数为0.038 5,压力损失为98.3 Pa。结果表明,压力漩涡的大小及流速滞留区的范围与整流器密切相关。对矿用空气幕出风口速度分布均匀性影响最大的是供风器出风口宽度,其次为导流体中截面半径;对矿用空气幕压力损失影响最大的是供风器出风口宽度,其次为整流器及供风器长度。当导流体为圆锥体时,矿用空气幕的性能最优。
In order to reduce the energy consumption of air curtain, according to the aerodynamics theory, the air curtain model with double cubic curve as the outer contour of the rectifier was established. The orthogonal simulation test method was used to calculate the velocity distribution uniformity and resistance loss As evaluation index, the distribution law of flow field in mine air curtain under different structural parameters was studied, the velocity distribution uniformity and pressure loss at the outlet of mine air curtain were calculated, and the optimal mine air curtain structural model was obtained. The model wind velocity uniformity parameter is 0.038 5, the pressure loss is 98.3 Pa. The results show that the size of the pressure swirl and the range of the flow rate detention zone are closely related to the rectifier. The air outlet velocity distribution uniformity of mine air curtain has the greatest impact on the outlet width of the air supply, followed by the radius of the cross section of the flow guide. The maximum impact on the pressure loss of mine air curtain is the width of the outlet of the air supply, followed by Rectifier and air supply length. The mine air curtain has the best performance when the flow guide is a cone.