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Profile optimization of the impeller blade of a low-speed centrifugal pump using surrogate modeling

IOP Conference Series: Materials Science and Engineering, ISSN: 1757-899X, Vol: 779, Issue: 1
2020
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Conference Paper Description

This article presents an alternative approach to optimizing the profile of the impeller blade of a centrifugal pump. The researches were carried out using modern methods of computational fluid dynamics and the ANSYS CFX software package. The target of optimization is to maximize hydraulic efficiency and head. The calculated variables were selected using the Bezier biquadratic curve, and calculation experiments were used to select reference points from the projected space. Particular attention is paid to the construction of a surrogate RSA model, which is used in numerical simulation. To study the optimal points, the NSGA-II genetic algorithm was used. In a process of processing the results, a standard response surface with a second-order polynomial was formed to predict integral parameters. It is concluded that the main problem associated with the optimization of design based on a surrogate model is the accuracy of modeling the approximation functions. Also, the use of several surrogates can increase the reliability of optimization with minimal computational costs.

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