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- W4386522011 abstract "The current renewable energy market forces hydraulic turbines to operate for longer periods of time at off-design and transient conditions. Their life expectancy is then decreased due to the wear provoked by flow instabilities and stochastic flow excitations. This study presents an experimental investigation into the fatigue damage induced on the runner blades of a Kaplan turbine model when working at speed-no-load (SNL), part load (PL) and during ramps of load. The unit was equipped with on-board sensors on the blades and the shaft as well as with off-board sensors installed on the supporting structure and the draft tube cone. The results reveal that operation at SNL induces more fatigue damage on the runner blades than at PL. The damage is then mainly induced by stochastic flow excitations at SNL and by the rotating mode of the rotating vortex rope (RVR) at PL. The ramps of load, when crossing each operating condition, cause levels of damage similar to those found in stationary operation. Finally, it was proved that the blade fatigue damage can be estimated from on-board shaft measurements at any condition. However, the blade fatigue damage can only be estimated using off-board measurements when the RVR is fully developed at PL." @default.
- W4386522011 created "2023-09-08" @default.
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- W4386522011 date "2023-09-07" @default.
- W4386522011 modified "2023-09-26" @default.
- W4386522011 title "Fatigue damage analysis of a Kaplan turbine model operating at off-design and transient conditions" @default.
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- W4386522011 doi "https://doi.org/10.1177/14759217231191417" @default.
- W4386522011 hasPublicationYear "2023" @default.
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