Hill chart modelling using the Hermite polynomial chaos expansion for the performance prediction of pumps running as turbines
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At low flow rate operation, Francis turbines feature a cavitating vortex rope in the draft tube resulting from the swirling flow of the runner outlet. The unsteady pressure field related to the precession of the vortex rope induces plane wave propagating i ...
NOVELTY - Production of a component (23) coated with a heat protection layer (21) and having a high thermal load capacity comprises applying an adhesion layer (22) containing aluminum on the surface of the component, and applying the heat protection layer ...
The low frequency pressure oscillations observed at the draft tube wall of a Francis turbine operating at part load may be split into two uniform components: a rotating pressure with a constant area-averaged value, and a synchronous pulse involving the who ...
International Association For Hydraulic Research1994
Design, operation and refurbishment of hydraulic turbines, pumps or pump-turbine are strongly related to cavitation flow phenomena, which may occur in either the rotating runner-impeller or the stationary parts of the machine. The paper presents the cavita ...
An experimental investigation on Francis turbines suffering from inlet cavitation erosion on the runner blades has permitted to assess several aspects of the actual cavitation erosion detection and prediction methods based on vibrations. Detection tests in ...
International Association For Hydraulic Research2002
