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Erschienen in:
1996 | OriginalPaper | Buchkapitel
Non-Stationary Flow in Reversible Francis Turbine Runner Due to Wakes Trailing the Guide Vanes
verfasst von : Jo Jernsletten
Erschienen in: Hydraulic Machinery and Cavitation
Verlag: Springer Netherlands
Enthalten in: Professional Book Archive
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Experimental and numerical analysis are presented of the unsteady flow in a reversible Francis pump turbine runner due to the effect of wakes trailing the guide vanes. The dynamic fluctuating pressure has been measured with pressure transducers on the inlet part of the runner, blades in generating mode in two operational points. A numerical solver of three-dimensional turbulent flow based on weakly compressible Navier-Stokes equations is applied to predict the unsteady flow in the turbine runner. The effect of the guide varies upstream the runner is modelled with a sinusoidal inlet function which fluctuate the absolute inflow velocity.