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- W1577801711 abstract "Using the method described in Part 1. the effect of surface roughness of flow passages, runner seal clearance and the Reynolds number on the hydraulic performance and loss distribution coefficient V is quantitatively made clear. V opt which is the value of V at the optimum efficiency point varies within the range of approx. 0.96-1.05 times the original value when the surface roughness of all of flow passages in a model turbine becomes 0.5-2 times the original roughness, however, does not vary with the runner seal clearance. When the Reynolds number varies with the change of head or water temperature, the admissible surface roughness of each How passage decreases as the Reynolds number increases, thus each friction coefficient becomes the value corresponding to the rough surface region. As a result, the change of performance and V opt due to the change of the Reynolds number becomes smaller in comparison to that in the case with smooth surfaces. On the contrary, when the head, water temperature and surface..." @default.
- W1577801711 created "2016-06-24" @default.
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- W1577801711 date "1989-11-01" @default.
- W1577801711 modified "2023-09-24" @default.
- W1577801711 title "Analysis of scale effects on performance characteristics of hydraulic turbines" @default.
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- W1577801711 doi "https://doi.org/10.1080/00221688909499109" @default.
- W1577801711 hasPublicationYear "1989" @default.
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