基于智能优化算法的离心泵叶轮优化设计

Optimization Design of Centrifugal Pump Impeller Based on Intelligent Optimization Algorithm

本文以比转速为67的离心泵叶轮为研究对象,以离心泵的水力效率η以及汽蚀余量NPSHr为优化目标,以包括叶轮进口直径d_(s)、叶轮出口直径d_(2)、叶轮出口宽度b_(2)、叶轮前/后盖板形状、叶轮轴向高度Deta Z、叶片出口角Beta2、叶片数以及叶片包角等15个主要几何参数作为设计变量,利用专业的叶轮机械设计软件CFturbo建立离心泵叶轮的参数化模型,利用先进的智能优化算法对目标函数进行多目标优化,得出15个设计参数的最优组合,利用专业的旋转机械分析软件Simerics-MP+对优化前后的离心泵模型进行数值计算,结果显示,优化后的几何模型水力效率以及NPSHr均有所改善。

The research object of this paper is a centrifugal pump with a specific speed of 67.The optimization objectives are efficiency and NPSHr of the pump.The 15 main design variables include impeller inlet diameter d_(s),impeller outlet diameter d_(2),impeller outlet width b_(2),shroud and hub profile,axial height of impeller Deta Z,balde outlet angle Beta2,number of blades,wrap angle,etc.The professional rotating machine software CFturbo have been used to creat the parameterized model of a centrifugal pump.Using advanced intelligent optimization algorithm to perform multi-objective optimization of objective function.The optimal combination of 15 design variables is obtained.Then,The model of centrifugal pump before and after optimization was numerically calculated by professional rotating machinery analysis software Simerics MP+.The results showed that the hydraulic efficiency and NPSHr of the optimized pump model were improved.