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以矿用对旋式轴流通风机为研究对象,应用计算流体力学软件FLUENT在不同叶片数及轴向间隙下对通风机气动性能进行三维流场模拟,分析不同叶片数及轴向间隙对通风机气动性能的影响.结果表明随着通风机前后两级叶轮叶片数的增加,通风机的全压会相应地增大,效率会先提高后降低,即存在一个前后两级叶轮叶片数的最佳组合,此时通风机的气动性能最佳.在前后两级叶轮最佳叶片数组合下,两级叶轮轴向间隙的增大会增加通风机流道内气流的摩擦损失,从而降低通风机的全压和效率;减小两级叶轮的轴向间隙可提高通风机的全压和效率,但叶片的振动和通风机的噪声会有所增大.研究结果对矿用对旋式轴流通风机的优化设计具有一定的指导意义.
Taking the mining counter-rotating axial fan as the research object, three-dimensional flow field simulation of the aerodynamic performance of the ventilator was carried out by using the CFD software FLUENT under different blade numbers and axial clearances. The effects of different numbers of blades and axial clearances on the ventilation The results show that with the increase of the number of impeller blades at both the front and the back of the ventilator, the total pressure of the ventilator will increase correspondingly and the efficiency will firstly increase and then decrease, that is, there will be a maximum of the number of impeller blades before and after Good combination of the best aerodynamic performance of the fan at the front and rear two impeller optimal combination of the number of leaves, two impeller axial clearance increases the airflow in the fan flow increases the friction loss, thereby reducing the overall fan Pressure and efficiency.Improving the axial clearance of the two-stage impeller can increase the total pressure and efficiency of the ventilator, but the vibration of the blade and the noise of the ventilator will increase.Research results show that the counter-rotating axial flow fan The optimal design has some guiding significance.