Calculation of Three-Dimensional Turbulent Flow in Francis Turbine Runnerby Charles C. S. Song, Univ of Minnesota, Minneapolis, United States,
Xiang Ying Chen, Univ of Minnesota, Minneapolis, United States,
Abstract: A numerical scheme, based on MacCormack's predictor-corrector explicit finite volume method, for solving three-dimensional weakly compressible inviscid, laminar, and turbulent flows in a Francis turbine runner is developed, in which Smagrinsky's subgrid-scale turbulent model is used to close the volume averaged equations. The computations are performed on partial and whole runner domains to determine the effect of periodic boundary condition on numerical results. It is indicated that reasonable results have been obtained in the application of the numerical scheme to the computation of the flow in a real Francis turbine runner by comparing with previous calculations and experimental data.
Subject Headings: Numerical methods | Three-dimensional flow | Turbulent flow | Turbines | Finite volume method | Three-dimensional models | Computing in civil engineering | Fluid flow
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