Optimization design of meridional surface of centrifugal pump impeller based on high-dimensional hybrid model
In order to improve the operation efficiency and head of centrifugal pumps under the design conditions,a centrifugal pump impeller optimization design method based on high-dimensional hybrid model was proposed.A single-stage centrifugal pump with specific speed of 157 was selected as the re-search object for this study.The optimization variables were parameterized in CFturbo software,and then combined with numerical simulation to obtain the training set of the high-dimensional hybrid model.By using MATLAB machine learning on the obtained training set,a high-dimensional support vector regression model between efficiency,head and optimization parameters was obtained,and a ge-netic algorithm was used for the optimization.Under the design working conditions,the predicted effi-ciency and head values of the fitted high-dimensional hybrid model are 1.5%and 3.2 m higher than the original model,respectively.The efficiency and head values of the optimized scheme verified by nu-merical simulation are 0.9%and 2.1 m higher than the original model,respectively.This case study shows that the application of a high-dimensional hybrid model in the optimal design of a centrifugal pump impeller can achieve rapid optimization and improve the hydraulic performance of the centrifugal pump.
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