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research-article

Multi-objective optimization of multistage centrifugal pump based on surrogate model

[+] Author and Article Information
Tong Shuiguang

Institute of mechanical engineering, Zhejiang University, No.38, Zheda Rd, Hangzhou, 310027, China
11525068@zju.edu.cn

Zhao Hang

Institute of mechanical engineering, Zhejiang University, No.38, Zheda Rd, Hangzhou, 310027, China
zhaoyihang@zju.edu.cn

Liu Huiqin

Institute of mechanical engineering, Zhejiang University, No.38, Zheda Rd, Hangzhou, 310027, China
17316901897@163.com

Yu Yue

Institute of mechanical engineering, Zhejiang University, No.38, Zheda Rd, Hangzhou, 310027, China
13071895986@163.com

Li Jinfu

Hangzhou Alkali Pump Co.,Ltd. No.12, Xiyuan 5th Rd, Hangzhou, 310030, China
879208985@qq.com

Cong Feiyun

Institute of mechanical engineering, Zhejiang University, No.38, Zheda Rd, Hangzhou, 310027, China
cloudswk@zju.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4043775 History: Received September 18, 2018; Revised May 09, 2019

Abstract

In this paper, the hydraulic efficiency optimization calculation method of a 10-stage centrifugal pump is researched. According to the hydraulic loss model, a multi-objective optimization calculation method based on surrogate models is proposed. In order to study the highly nonlinear relationship between key design variables and centrifugal pump external characteristic values, this paper builds the quadratic response surface, the radial basis Gaussian response surface and Kriging three surrogate models using CFD simulation analysis. Two types of calculation models (hydraulic loss model and three surrogate models) combined NSGA-? genetic algorithm are applied to optimize the key design variables and to find the optimal solution of each model. The accuracy and effectiveness of the efficiency optimization methods based on the two types of calculation models are compared and analyzed. The results show that the calculation method of hydraulic loss model based on the semi-theoretical and semi-empirical formula is less time-consuming but inaccurate. In contrast, the optimization method based on surrogate models using CFD simulation is accurate. What's more, comparing the surrogate models, the results based on the complete quadratic response surface model which makes the efficiency of the first stage centrifugal pump reach 77.26% are more accurate.

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