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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.4
- 발행연도
- 2017.12
- 수록면
- 404 - 411 (8page)
- DOI
- 10.5293/IJFMS.2017.10.4.404
이용수
초록· 키워드
오류제보하기
To analyze the dynamic evolutions between the draft tube pressure pulsations and vortex ropes of a Francis turbine, the runaway transient process of a hydropower system is simulated by coupling a one-dimensional model of the water conveyance system and a three-dimensional model of the Francis turbine. The results show that the annular-distributed pressure pattern at the entrance of the draft tube breaks and induces small vortex ropes, which then merge into an eccentric-distributed helical one with the transient operating point moving away from the rating region. In this process, low frequency pressure pulsations form and continue to strengthen. When the operating point moves to the runaway point, the vortex ropes keep dividing and merging irregularly, causing random-like pressure pulsations.
목차
Abstract
1. Introduction
2. Numerical methods and validation
3. Results and discussion
4. Conclusions
References
참고문헌 (21)
참고문헌 신청
[학술지(정기간행물)] - KC, A. / 2016 / CFD study on prediction of vortex shedding in draft tube of Francis turbine and vortex control techniques / Renewable Energy 86 : 1406 ~ 1421
[학술지(정기간행물)] - Favrel, A. / 2015 / Study of the vortex-induced pressure excitation source in a Francis turbine draft tube by particle image velocimetry / Experiments in Fluids 56 (12) : 215 ~
[학술지(정기간행물)] - Bergan, C. / 2015 / Preliminary Measurements of the Radial Velocity in the Francis-99 Draft Tube Cone / Journal of Physics: Conference Series 579 (1) : 012014 ~
[학술지(정기간행물)] - Jost, D. / 2015 / Numerical simulation of flow in a high head Francis turbine with prediction of efficiency, rotor stator interaction and vortex structures in the draft tube / Journal of Physics:Conference Series 579 (1) : 012006 ~
[학술지(정기간행물)] - Stefan, D. / 2015 / Proper Orthogonal Decomposition of Pressure Fields in a Draft Tube Cone of the Francis (Tokke) Turbine Model / Journal of Physics: Conference Series 579 (1) : 012002 ~
[학술지(정기간행물)] - Favrel, A. / 2015 / Study of the vortex-induced pressure excitation source in a Francis turbine draft tube by particle image velocimetry / Experiments in Fluids 56 (12) : 215 ~
[학술지(정기간행물)] - Bergan, C. / 2015 / Preliminary Measurements of the Radial Velocity in the Francis-99 Draft Tube Cone / Journal of Physics: Conference Series 579 (1) : 012014 ~
[학술지(정기간행물)] - Jost, D. / 2015 / Numerical simulation of flow in a high head Francis turbine with prediction of efficiency, rotor stator interaction and vortex structures in the draft tube / Journal of Physics:Conference Series 579 (1) : 012006 ~
[학술지(정기간행물)] - Stefan, D. / 2015 / Proper Orthogonal Decomposition of Pressure Fields in a Draft Tube Cone of the Francis (Tokke) Turbine Model / Journal of Physics: Conference Series 579 (1) : 012002 ~
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UCI(KEPA) : I410-ECN-0101-2018-554-001894851