Flow Calculation in a Francis Runner

by E. Göde, Sulzer-Escher Wyss AG, Zurich, Switzerland,
J. Pestalozzi, Sulzer-Escher Wyss AG, Zurich, Switzerland,

Document Type: Proceeding Paper

Part of: Water Power '87


The flow through a Francis runner has been analysed theoretically. The flow calculations have been carried out by use of an inviscid 3D computational method solving the Euler-Equations. It is an explicit time-marching Finite Volume approach using a model for artificial viscosity and artificial compressibility in order to cope with internal hydraulic flow problems. The results are compared with calculations carried out with a Quasi-3D method using the Finite Element technique. This Q3D approach deals with an iteration procedure between meridional and blade-to-blade flow.

Subject Headings: Three-dimensional flow | Finite element method | Hydraulic models | Finite volume method | Water flow | Three-dimensional analysis | Viscous flow | Turbines

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