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为了缩短水力机械的水力设计周期和提高设计效率,提出了一种水力机械全三维的优化设计体系,实现了叶片参数化设计、网格划分、CFD计算和后处理的过程全自动集成。采用了遗传算法(GA)全局探索、响应面(RSM)近似建模和二次序列规划方法(SQP)局部寻优的二阶组合优化策略,达到了高效优化设计水力机械叶轮的目的。利用该优化设计平台,以离心泵叶轮水力效率最大化为目标函数,以影响叶片形状的多个几何参数为设计变量,对离心泵叶轮进行了优化设计。优化设计后叶轮水力效率由原来的89.8%提高到92.4%。
In order to shorten the hydraulic design cycle of hydraulic machinery and improve the design efficiency, a full three-dimensional optimization design system of hydraulic machinery is proposed, which realizes the fully automatic integration of blade parametric design, meshing, CFD calculation and post-processing. The GA (global exploration), approximate modeling of response surface (RSM) and the second-order optimization strategy of quadratic sequence programming method (SQP) are used to achieve the goal of efficiently and efficiently designing hydraulic machinery impellers. Based on this optimized design platform, the objective function is to maximize the hydraulic efficiency of the centrifugal pump impeller, and the design parameters of the centrifugal pump impeller are optimized based on the geometric parameters that affect the blade shape. After optimization, the hydraulic efficiency of the impeller increased from 89.8% to 92.4%.