Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Hydrodynamic and Structural Design and Analysis of an Impeller for a Cavitation Tunnel
Submission Author:
Ricardo Sbragio , SP , Brazil
Co-Authors:
Ricardo Sbragio, Manassés Monteiro, Eduardo Malta
Presenter: Eduardo Malta
doi://10.26678/ABCM.COBEM2019.COB2019-0058
Abstract
The objective of this paper is to present the design and the analysis of an impeller for a cavitation tunnel. The impeller design uses circulation theory to determine the thrust needed to overcome the head loss of the cavitation tunnel and the associated torque. The structural design determines the stress at the impeller blade using beam theory. In order to check the design results, a Computational Fluid Dynamics (CFD) and a Finite Element Method (FEM) analysis are done. The CFD mesh is divided in a rotating mesh at the impeller blades and a static mesh for the rest of the cavitation tunnel domain. The maximum impeller rotation is set to be the input. The velocity at the cavitation tunnel is obtained as the result of the analysis. The pressure distribution over the blade obtained from CFD is used for FEM structural analysis. The final velocity at the test section for the design rotation and the Von Mises stress at the impeller blades agreed well with the design values.
Keywords
cavitation tunnel, CFD, FEM, hydrodynamics, impeller design
