Effects on the performance and flow field of the axial flow pump hydraulic components with Fluid-Solid Interaction

The two-way calculation of fluid field and the combined solution of structural transient dynamic analysis of axial flow pump are carried out based on elastomer structural dynamics equation and Navier-Stokes equation and RNG k-e turbulence model, the effect of the Fluid-Solid Interaction (FSI) on the head and efficiency of axial flow pump, and the flow field and the axial force were analysed. The axial pump blade dynamic stress characteristics were investigated. The blade displacement and deformation and stress distribution were predicted. The head and efficiency of axial flow pump considering FSI effect were analysed. Numerical results show that the maximum displacement of the axial flow pump impeller blade with FSI effect occurs in the blade inlet at the rim, but the displacement of the blade root is smaller; the impeller blade root close to the hub exists significant stress concentration phenomenon; the stress and deformation of blade gradually decreases with the flow rate increasing; the head and efficiency with FSI has declined comparing with not considering FSI, but the decline is small without considering FSI. .