2012 Fiscal Year Final Research Report
A Study of Full-Load Draft Tube Surge in Hydraulic Power Turbine
| Project/Area Number |
23760158
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Fluid engineering
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| Research Institution | Osaka University |
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Principal Investigator |
YONEZAWA Koichi 大阪大学, 大学院・基礎工学研究科, 助教 (00362640)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 流体機械 / キャビテーション不安定現象 |
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| Research Abstract |
Experimental and numerical investigations of a surge in a hydraulic turbine draft tube were carried out using a subscale model. It has been confirmed that the draft tube surge occurs at wide range of the operation condition from the low flow rate through the over load conditions. The frequencies of the surge are different from those of the vortex rope precession. Additionally, dynamic characteristics of the cavitation in the draft tube were examined experimentally by imposing flow rate fluctuations.
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[Journal Article]2012
Author(s)
Koichi Yonezawa, Daisuke Konishi, Kazuyoshi Miyagawa, Francois Avellan, Peter Doerfler, and Yoshinobu Tsujimoto
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Journal Title
International Journal of Fluid Machinery and Systems
Volume: Vol. 5, No. 4
Pages: 152-160
DOI
Peer Reviewed
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