New insight in Francis turbine cavitation vortex rope: role of the runner outlet flow swirl number

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Francis turbines with medium or high specific speeds may experience a particular type of instability in the upper part load in which the precessing vortex has an elliptical shape. The occurrence of the upper part-load instability (UPLI) is accompanied by l ...

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New insight in Francis turbine cavitation vortex rope: role of the runner outlet flow swirl number

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