【摘要】 采用欧拉-拉格朗日多相流模型,对双吸式离心泵内的水流和泥沙颗粒运动进行了模拟,并采用离散相冲击磨损模型分析了3种不同叶轮形式对离心泵叶片泥沙磨损的影响,分析结果表明:双吸式离心泵叶轮叶片的压力面和吸力面均存在不同程度的磨损,磨损严重的位置主要集中在叶片的进口处和出口处,吸力面受较强磨损的范围明显大于压力面;相比于原型叶轮,隔板式叶轮叶片压力面进口磨损强度降低,压力面和吸力面整体较强磨损范围均减小;吸力面加厚式叶轮叶片压力面出口处集中磨损强度降低,压力面和吸力面整体较强磨损范围均明显减小。更多还原

【Abstract】 Water flow and silt movement in a double suction centrifugal pump were simulated using an Euler-Lagrange multiphase flow model.Blade erosion rates were predicted using aparticle erosion model and the influence of impeller type on silt abrasion was analyzed.The results show:the silt abrasion is existed inordinately on the pressure side and suction side of blade,the blade inlet and outlet are severely silt abraded and the region of abrading strongly is obviously larger on the suction side than on the pressure side;Compared with the prototype pump,as the clapboard-type impeller,the strength of abrasion on the pressure side of the blade inlet is declined,the regions of abrading strongly on the pressure side and suction side both become smaller.In the suction side-thickening type impeller,the strength of concentrated abrasion on the pressure side of the blade outlet is declined,and the regions of abrading strongly on the pressure side and suction side are both clearly lower.更多还原