基于六西格玛理论的轴流泵叶轮水力效率影响因子分析

为提高潜水轴流泵的水力效率,采用流线法进行叶轮设计,基于六西格玛理论中的试验设计和拟合回归分析及CFD数值模拟分析计算了各试验方案的叶轮水力效率,探讨了对叶轮水力效率影响最大的叶栅稠密度和进口冲角两个参数的不同组合对叶轮水力效率的影响。结果表明,对于比转速为1 250的轴流泵,同时增大叶栅稠密度和减小进口冲角可提高叶轮水力效率。对水力模型进一步优化设计并进行CFD分析,所得水力效率值与拟合回归结果吻合。

Influencing Factors Analysis of Hydraulic Efficiency of Axial Flow Pump Impeller Based on Six Sigma Theory

In order to improve the hydraulic efficiency of the submersible axial flow pump , streamline method is adopted in impeller design. Based on the experimental design and fitting regression analysis of Six Sigma theory, the impeller hydraulic efficiency of each scheme is calculated by CFD numerical simulation. The impact of different combinations of cascade density and inlet incidence angle on the hydraulic efficiency of impeller is discussed. The results show that for the axial flow pump with a specific speed of 1 250, the hydraulic efficiency of the impeller can be improved by increasing the cascade density and reducing the inlet incidence angle simultaneously. The hydraulic model is further optimized and CFD analysis is carried out, and the hydraulic efficiency is consistent with that of fitting regression.