지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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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.10 No.2
- 발행연도
- 2017.6
- 수록면
- 164 - 175 (12page)
- DOI
- 10.5293/IJFMS.2017.10.2.164
이용수
초록· 키워드
오류제보하기
Francis turbines are often operated over a wide load range due to high flexibility in electricity demand and penetration of other renewable energies. This has raised significant concerns about the existing designing criteria. Hydraulic turbines are not designed to withstand large dynamic pressure loadings on the stationary and rotating parts during such conditions. Previous investigations on transient operating conditions of turbine were mainly focused on the pressure fluctuations due to the rotor-stator interaction. This study characterizes the synchronous and asynchronous pressure and velocity fluctuations due to rotor-stator interaction and rotating vortex rope during load variation, i.e. best efficiency point to part load and vice versa. The measurements were performed on the Francis-99 test case. The repeatability of the measurements was estimated by providing similar movement to guide vanes twenty times for both load rejection and load acceptance operations. Synchronized two dimensional particle image velocimetry and pressure measurements were performed to investigate the dominant frequencies of fluctuations, vortex rope formation, and modes (rotating and plunging) of the rotating vortex rope. The time of appearance and disappearance of rotating and plunging modes of vortex rope was investigated simultaneously in the pressure and velocity data. The asynchronous mode was observed to dominate over the synchronous mode in both velocity and pressure measurements.
목차
Abstract
1. Introduction
2. Experimental facility
3. Experimental results and discussion
4. Conclusion
References
참고문헌 (14)
참고문헌 신청
[학술지(정기간행물)] - Trivedi C. / 2013 / Effect of Transients on Francis Turbine Runner Life: A Review / Journal of Hydraulic Research 51 (2) : 121 ~ 132
[학위논문] - Trivedi C. / 2014 / Investigation of transient pressure loading on a high head model Francis turbine / Ph. D. / Lulea University of Technology
[학술지(정기간행물)] - Trivedi, C. / 2014 / Pressure Measurements on a High Head Francis Turbine during Load Acceptance and Rejection / Journal of Hydraulic Research 52 (2) : 283 ~ 297
[학술지(정기간행물)] - Amiri, K. / 2015 / Unsteady Pressure Measurements on the Runner of a Kaplan Turbine during Load Acceptance and load Rejection / Journal of Hydraulic Research 54 (1) : 56 ~ 73
[학술지(정기간행물)] - K. Amiri / 2016 / Effects of load variation on a Kaplan turbine runner / International Journal of Fluid Machinery and Systems 9 (2) : 182 ~ 193
[학위논문] - Trivedi C. / 2014 / Investigation of transient pressure loading on a high head model Francis turbine / Ph. D. / Lulea University of Technology
[학술지(정기간행물)] - Trivedi, C. / 2014 / Pressure Measurements on a High Head Francis Turbine during Load Acceptance and Rejection / Journal of Hydraulic Research 52 (2) : 283 ~ 297
[학술지(정기간행물)] - Amiri, K. / 2015 / Unsteady Pressure Measurements on the Runner of a Kaplan Turbine during Load Acceptance and load Rejection / Journal of Hydraulic Research 54 (1) : 56 ~ 73
[학술지(정기간행물)] - K. Amiri / 2016 / Effects of load variation on a Kaplan turbine runner / International Journal of Fluid Machinery and Systems 9 (2) : 182 ~ 193
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