Dynamic Characteristics of a Centrifugal Pump with Fluid-Structure Interaction Method and on Consideration of Added Mass

Centrifugal pump is an important energy conversion device, widely used in various fields such as petrochemical industry, aerospace and other fields. It is very necessary to ensure the safety and reliability of centrifugal pumps. Therefore, the mechanical characteristics and vibration characteristics of a centrifugal pump with a specific speed of 91 are analyzed in this paper. The whole flow field is calculated based on the Reynolds average Navier–Stokes equation and RNG k-ε model. For solid region, it is calculated by the structural dynamics equation of elastomer. The coupling between the flow field and the solid region is realized by data transfer on the fluid-structure interaction surface. The flow characteristics, vibration characteristics and mechanical characteristics of the centrifugal pump are analyzed in this paper, and the influence of added mass on the mechanical and vibration characteristics is investigated. The research results are helpful to analyze the dynamic characteristics of centrifugal pumps, and provide a theoretical support for the design and safe operation of centrifugal pumps.