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Flow Calculation in a Francis Runner

by E. G?de, Sulzer-Escher Wyss AG, Zurich, Switzerland,
J. Pestalozzi, Sulzer-Escher Wyss AG, Zurich, Switzerland,



Document Type: Proceeding Paper

Part of: Water Power '87

Abstract:

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: Hydraulic models | Finite volume method | Viscosity | Turbines | Three-dimensional analysis | Finite element method | Computer models

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