Numerical investigation on fluid-solid interaction of large-scale centrifugal pumps for pump station

Abstract

Abstract Large-scale centrifugal pumps are significant components in pump stations for water supply projects. In order to figure out the flow and vibration characteristics of large-scale centrifugal pumps, numerical investigation is carried out on the fluid-solid interaction of large-scale centrifugal pumps with stay vanes and adjustable guide vanes. SST k-ω turbulence model is employed to solve turbulent flow inside centrifugal pumps, and the simulated flow fields are imposed on solid impellers by one-way coupling method. The results show that the maximum deformation, maximum stress and maximum strain appear at the impeller outlet with the maximum radius under both schemes of stay vanes and adjustable guide vanes. In addition, compared with the scheme of stay vanes, the non-uniform distribution along circumferential distribution can be suppressed with the equipment of adjustable guide vanes, while the absolute value under adjustable guide vanes is larger than that under stay vanes.