Abstract
The performance of reaction hydraulic turbines such as Francis, Kaplan and reversible pump-turbines is analytically studied in this paper. The one-dimensional loss analysis method coupled with flow analyses for a runner, stay vanes and guide vanes is presented in order to improve the accuracy of the prediction method. The Francis turbine with a specific speed of 240 (m, rpm, KW) was tested and compared with prediction results for efficiency and discharge characteristics. From the comparisons between predicted and measured performances, it is shown that the present method is available for the performance prediction of Francis turbines and can predict the performance with a good accuracy even at off-design points.
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