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- W4311461306 abstract "The helical vortex is formed in the draft tube of Francis turbine under partial load condition, which has an adverse effect on the safe and stable operation of the turbine. In order to study the correlation between the flow field at the runner outlet and the variation of vortex in the draft tube, the influence of the circumferential velocity and meridional velocity at the runner outlet on the vertex shape is analyzed through the simulation and experiment method. The results show that the meridional velocity at runner outlet has positive correlation with the diameter of the vortex. The vortex volume decreases with the decrease of the low meridional velocity region at the runner outlet. Decreasing the standard deviation of the circumferential velocity at the runner outlet is conductive to decrease the pressure fluctuation amplitude and its hydraulic loss in the draft tube." @default.
- W4311461306 created "2022-12-26" @default.
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- W4311461306 date "2022-11-23" @default.
- W4311461306 modified "2023-09-24" @default.
- W4311461306 title "Correlation research between Francis runner outlet flow and draft tube vortex" @default.
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- W4311461306 doi "https://doi.org/10.1117/12.2645837" @default.
- W4311461306 hasPublicationYear "2022" @default.
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