An experimental study of aperiodic pressure pulses in Francis turbine

The paper presents the results of experimental studies of the vortex rope reconnection in the flow of a Francis turbine. The studies were carried out on a mid-scale hydrodynamic set-up, with a model similar to the actual hydroelectric units. With the help of high-speed camera in a mode with a load o...

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Veröffentlicht in:	Journal of physics. Conference series 2017-09, Vol.899 (2), p.22013
Hauptverfasser:	Platonov, D, Dekterev, D, Minakov, A, Maslennikova, A
Format:	Artikel
Sprache:	eng
Schlagworte:	Diffusers Draft tubes High speed cameras Physics Pressure pulses Rope Turbines Vortex rings Vortices
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Zusammenfassung:	The paper presents the results of experimental studies of the vortex rope reconnection in the flow of a Francis turbine. The studies were carried out on a mid-scale hydrodynamic set-up, with a model similar to the actual hydroelectric units. With the help of high-speed camera in a mode with a load of 82% a reconnection of the precessing vortex rope with detachment of the vortex rings was observed in the diffuser of the draft tube. Aperiodic pressure pulses associated with the vortex rope reconnection in diffuser in the draft tube.
ISSN:	1742-6588 1742-6596
DOI:	10.1088/1742-6596/899/2/022013