基于CFD的离心泵结构参数优化

为获得离心泵的最佳结构参数，根据给定的离心泵设计参数确定离心泵的结构形式和性能评价指标，计算离心泵各结构参数，利用CFD对离心泵进行流场数值模拟分析，设计了叶轮结构L16（45）正交实验表，选择叶轮进口安装角βb1、出口安装角βb2、包角φ、进口直径D1、出口直径D2为正交实验的5个因素，完成了正交实验并对实验结果进行极差分析，得到各结构参数对各优化方向评价指标影响排序及其影响情况，构造出效率最大、汽蚀余量最小条件下的目标函数及统一目标函数，并运用遗传算法对离心泵效率和汽蚀进行多目标优化，得到离心泵的最佳结构组合参数.

Optimization of structure parameters of centrifugal pump based on CFD

In order to obtain the optimum structure parameters of the centrifugal pump, based on the design parameters of a given centrifugal pump, the structural form and performance evaluating index of centrifugal pump were determined and the structural parameters of the centrifugal pump were calculated. Using CFD to make flow numerical simulation analysis on centrifugal pump, the L16(45) orthogonal test table of Impeller structure was designed, selecting of impeller inlet angle, outlet angle, wrap angle, inlet diameter, outlet diameter as the five factors of orthogonal experiment,and the orthogonal experiment was completed and the range analysis of the results was made, and the influence of structure parameters were obtainedon the ranking optimization direction of evaluation index and the influence. The object function and unified objective function with the maximum efficiency and minimum cavitation were constructed, using genetic algorithm to optimize the efficiency and cavitation of centrifugal pump, and the best structure parameters of the centrifugal pump were obtained.