Modal analysis of turbocharger impeller considering fluid-solid interaction

In order to study the influence of fluid-solid interaction on modal parameters of the turbocharger impeller, a fluid field model of the impeller was established based on the theory of turbulence flow. The fluid grid was meshed, and the fluid boundary condition was loaded. After obtaining the velocity and pressure distribution of the inner flow filed of the impeller by calculations, the distributed pressure was loaded onto the surface of the impeller to calculate the modal parameters of the impeller. Calculation results show that the solid-fluid coupling field has an influence mainly on the modal frequencies of the impeller, and less on its modal shapes.