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논문 기본 정보

자료유형
학술저널
저자정보
Einar Agnalt (Norwegian University of Science and Technology) Bjørn Winther Solemslie (Norwegian University of Science and Technology) Pål-Tore Selbo Storli (Norwegian University of Science and Technology) Ole Gunnar Dahlhaug (Norwegian University of Science and Technology)
저널정보
한국유체기계학회 International Journal of Fluid Machinery and Systems International Journal of Fluid Machinery and Systems Vol.13 No.2
발행연도
2020.6
수록면
302 - 309 (8page)
DOI
10.5293/IJFMS.2020.13.2.302

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초록· 키워드

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Over the last years, several breakdowns in hydropower plants with low specific speed Francis runners have been reported. One of the main excitation forces in such runners is the pressure fluctuations originating from the rotor stator interaction. In this paper, the rotor-stator interaction has been analyzed utilizing pressure sensors onboard the runner. The pressure sensors were flush mounted in the hub of the runner and the signals were transmitted through a slip-ring system. The measurements have been analyzed relative to the runner angular position by utilizing an angular position sensor mounted to the shaft end. Measurements with different guide vane angle have been compared in order to study the potential flow interaction and the viscous wake effects for the pressure inside the runner. The results from the onboard pressure measurements found that the phase of the guide vane passing pressure seen by the onboard pressure sensors was independent of the guide vane opening. Hence, the potential flow interaction was found to be the dominant effect and no evidence from the viscous wake effect was found on the onboard pressure.

목차

Abstract
1. Introduction
2. Methods
3. Results
4. Discussion
5. Conclusion
References

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