Numerical Prediction of Cavitation Erosion on a Francis Turbine Runner

Abstract:

The paper presents numerical prediction of cavitation erosion on a Francis turbine runner using CFD code. The SST turbulence model is employed in the Reynolds averaged Navier–Stokes equations in this study. A mixture assumption and a finite rate mass transfer model were introduced. The computing domain is discretized with a full three-dimensional mesh system of unstructured tetrahedral shapes. The finite volume method is used to solve the governing equations of the mixture model and the pressure-velocity coupling is handled via a Pressure Implicit with Splitting of Operators(PISO) procedure. Comparison the numerical prediction results with a real runner with cavitation damage, the region of higher volume fraction by simulation with the region of runner cavitation damage is consistent.

• Periodical: Advanced Materials Research (Volumes 655-657)
• Pages: 449-456
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.655-657.449
• Online since: January 2013
• Authors: Hong Ming Zhang, Li Xiang Zhang
• Keywords: Cavitation Erosion, Computational Fluid Dynamics (CFD), Francis Turbine Runner, OpenFOAM

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