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5-1 学術雑誌論文 >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/10131/3734
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| Title: | Accurate Determination of Volumetric and Mechanical Efficiencies and Leakage Behavior of Francis Turbine and Francis Pump-Turbine |
| Author: | Kurokawa, Junichi
Kitahora, Takaya |
| Affiliation: | Professor, Yokohama National University, Japan
Asistant, Yokohama National University, Japan |
| Issue Date: | 1994 |
| Publisher: | International Association of Hydraulic Research (IAHR) |
| Abstract: | In order to determine the volumetric and the mechanical efficiencies of Francis turbine and Francis pump-turbine, the flow in the front and the back spaces of a runner equipped with several thrust balancing devices, such as balancing pipes and balancing holes, is analyzed theoretically. The flow characteristics in sixteen types of model Francis turbine and twelve types of model Francis pump-turbine of different specific speed are calculated, and mechanical and volumetric efficiencies are expressed as a function of specific speed. The influence of several dimensions of thrust balancing devices on those efficiencies are also determined together with the behaviour of axial thrust.
L'écoulement dans les espaces avant et arrière d 'une roue équipée de dispositifs d'équilibrage d'effort, tells des tuyaux et des orifices d'équilibrage, est analysé théoriquement, de manière à déterminer les efficacités volumétrique et mécanique d'une turbine de modèle Francis, ainsi que d'une turbo-pompe de modèle Francis. Les caractéristiques de l'écoulement sont calculées pour seize types de turbines Francis et douze types de turbo-pompes Francis, avec différentes vitesse spécifiques, et les efficacités volumétrique et mécanique sont exprimées comme fonctions de la vittesse spécifique. L'influence sur ces efficacités de la dimension de différents dispositifs d'équilibrage est également analysée, ainsi que le comportement de l'effort axial. |
| URI: | http://hdl.handle.net/10131/3734 |
| Type: | Conference Paper |
| Language: | eng |
| Journal Title: | Proceedings of the 17th symposium of the IAHR (Beijing) |
| Volume: | 2 |
| Start Page: | 889 |
| End Page: | 990 |
| Version: | publisher |
| Appears in Collections: | 5-1 学術雑誌論文
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Files in This Item:
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Description |
Size | Format |
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| B-074.pdf | | 1099Kb | Adobe PDF | View/Open |
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