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Yokohama National University Repository >
5 Faculty of Engineering / Graduate School of Engineering / School of Engineering >
5-1 学術雑誌論文 >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/10131/3704
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| Title: | Internal Flow Characteristics of a Centrifugal Pump with Very Low Specific Speed |
| Author: | Choi, Young-Do
Kurokawa, Junichi
Matsui, Jun
Imamura, Hiroshi |
| Affiliation: | Yokohama National University, Yokohama, Japan
Yokohama National University, Yokohama, Japan
Yokohama National University, Yokohama, Japan
Yokohama National University, Yokohama, Japan |
| Issue Date: | 2002 |
| Publisher: | International Association of Hydraulic Research (IAHR) |
| Abstract: | In the very low specific-speed range (Ns < 100[m,m3/min, rpm]), the efficiency of turbo-pump designed by conventional method becomes remarkably low. Therefore, positive-displacement pumps have long been used widely. However, the positive-displacement pumps have problems such as noise, vibration and need high manufacturing precision. Recently, since the turbo-pumps are becoming higher in rotational speed and smaller in size, there are lots of expectation of developing new turbo-pump with high performance at the very low specific speed range. The purpose of this study is to investigate the internal flow characteristics of a centrifugal pump in order to improve the pump performance. The results show that there is large recirculation flow at semi-open impeller outlet and the pump performance is largely affected by this recirculation flow.
Dans le domaine des vitesses spécifiques très basses (Ns < 100[m,m3/min, t/min]), le rendement des turbopompes conçues de manière conventionnelle devient extrêmement faible. De ce fait, des pompes volumétriques ont été largement utilisées. Cependant, les pompes volumétriques pressentent des problèmes tells que bruit ou vibrations, et nécessitent une précision élevée lors de la fabrication. Comme les turbopompes deviennent de plus en plus rapides en vitesse de rotation et compactes en dimensions, il y a beaucoup d'espoir de développer de nouvelles pompes de haute performance a faible vitesse spécifique. Le but de cette étude est d'examiner les caractéristiques de l'écoulement interne dans une pompe centrifuge afin d'en améliorer les performances. Les résultats montrent la présence de larges zones de recirculation en sortie de roues semiouvertes et que les performances en sont largement affectées. |
| URI: | http://hdl.handle.net/10131/3704 |
| Type: | Conference Paper |
| Language: | eng |
| Journal Title: | Proceedings of the XXIst IAHR Symposium on Hydraulic Machinery and Systems, September 9-12, 2002, Lausanne |
| Start Page: | 317 |
| End Page: | 323 |
| Version: | publisher |
| Appears in Collections: | 5-1 学術雑誌論文
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| B-125.pdf | | 706Kb | Adobe PDF | View/Open |
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