Centrifugal pump blade damage suppression design and optimization method based on multi-physical field coupling

Abstract

The application discloses a centrifugal pump blade damage inhibition design and optimization method based on multi-physical field coupling, comprising the following steps: constructing a fluid grid model of the centrifugal pump and performing transient flow field numerical simulation containing a cavitation model and a discrete phase model to obtain transient flow field simulation results of a cavitation field and a discrete phase motion field; calculating cavity collapse wall surface energy according to the transient flow field simulation results of the cavitation field, and establishing a first correlation model of blade geometric parameters and cavity collapse energy; calculating particle impact wall surface energy according to the transient flow field simulation results of the discrete phase motion field, and establishing a second correlation model of geometric blade parameters and particle impact wall surface energy; according to the first correlation model and the second correlation model, controlling the cavitation collapse energy and the particle impact energy to inhibit the damage caused by the multi-physical field coupling of cavitation and particle impact, and performing multi-objective optimization in the mode of minimizing the cavity collapse energy and minimizing the particle impact energy, so as to determine the optimal blade parameters.

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