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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국유체기계학회 International Journal of Fluid Machinery and Systems International Journal of Fluid Machinery and Systems Vol.12 No.3
- 발행연도
- 2019.9
- 수록면
- 217 - 227 (11page)
- DOI
- 10.5293/IJFMS.2019.12.3.217
이용수
초록· 키워드
오류제보하기
Increased penetration of intermittent energy resources disturbs the power grid network. The frequency band of the power grid is normally controlled by automatic opening and closing of the guide vanes of hydraulic turbines. This has increased the number of startup and shutdown cycles as compared to the defined ones for the normal operation of turbines. Turbine startup and shutdown induced a higher level of pressure fluctuations and unsteadiness in the flow field, decreasing its expected life. This paper presents the pressure and velocity measurements performed on a Francis turbine model during startup and shutdown. The pressure measurements were performed in the vaneless space and draft tube and two-dimensional particle image velocimetry measurements in the cone. The turbine operations from a standstill (no flow) and high load were considered to perform the startup and shutdown, respectively. The frequency of rotor-stator interactions and standing waves were well captured in the spectrograms of pressure signals. The signature of rotating vortex rope frequency was also observed in the spectrograms. A huge disturbance in the draft tube flow was observed due to these transient operations. The flow at the center was mainly dominated by the stagnant, separation and recirculating regions.
목차
Abstract
1. Introduction
2. Experimental facility
3. Results and discussion
4. Conclusion
References
참고문헌 (26)
참고문헌 신청
Huth, H.J. / 2005 / Fatigue design of hydraulic turbine runners
Deschênes, C. / 2002 / New trends in turbine modelling and new ways of partnership / International group of hydraulic efficiency measurement (IGHEM) :1~12
Bakken, T. H. / 2002 / Hydropower unit start-up costs / Proc. Int. Conf. IEEE Power Engineering Society Summer Meeting :1522~1527
Nilsson, O. / 1997 / Hydro unit start-up costs and their impacts on short term scheduling strategis of swedish power producers / IEEE Transaction on Power systems 12(1):38~44
Nilsson, O. / 1997 / Variable splitting applied to modelling of start-up costs in short term generation scheduling / IEEE Transaction on Power systems 12(2):770~775
Deschênes, C. / 2002 / New trends in turbine modelling and new ways of partnership / International group of hydraulic efficiency measurement (IGHEM) :1~12
Bakken, T. H. / 2002 / Hydropower unit start-up costs / Proc. Int. Conf. IEEE Power Engineering Society Summer Meeting :1522~1527
Nilsson, O. / 1997 / Hydro unit start-up costs and their impacts on short term scheduling strategis of swedish power producers / IEEE Transaction on Power systems 12(1):38~44
Nilsson, O. / 1997 / Variable splitting applied to modelling of start-up costs in short term generation scheduling / IEEE Transaction on Power systems 12(2):770~775
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