深井离心泵的水力设计和二次回归正交试验

根据研发新型井泵节能节材的要求,将水力设计与计算流体动力学技术和二次回归正交试验方法相结合,进行提高井泵效率的试验研究.试验选择深井离心泵的叶轮出口安放角和出口宽度两个几何因素,按二次回归正交试验方案,设计了10副叶轮.通过计算流体动力学技术对包含叶轮、导叶在内的两级新型深井离心泵的全流场进行了设计工况下的三维流场数值模拟,得到了10组设计方案额定点的效率值.通过二次回归正交试验法研究了叶轮出口安放角、出口宽度对效率的影响规律,根据计算结果对新型深井离心泵效率提出了二次回归约束方程.结果表明,采用叶轮极大直径设计法对提高新型深井离心泵的水力效率具有一定的参考价值.

Hydraulic design and quadratic regression orthogonal experiment of deep well centrifugal pumps

According to the research and development request of new deep well pump energy-saving and material-saving,test investigation was taken to increase the efficiency of deep well pumps by using hydraulic design of impeller,the modern CFD and the quadratic regression orthogonal test method.The experiment was carried out with two factors of outlet angle and outlet width.Ten impellers were designed through testing schemes of quadratic regression.The whole flow field of the two-stage new-type deep well pumps at design condition was simulated by CFD,and the efficiency of each case was obtained.The effects of both outlet angle and outlet width on efficiency were investigated through quadratic regression orthogonal testing method.According to the calculation results,constrained quadratic regression equation of the efficiency was put forward.The result shows that it would be instructive to increase the hydraulic efficiency of new-type deep well pumps by using the impeller diameter maximum approach.