지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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.1
- 발행연도
- 2019.3
- 수록면
- 22 - 30 (9page)
- DOI
- 10.5293/IJFMS.2019.12.1.022
이용수
초록· 키워드
오류제보하기
Cavitation is undesirable phenomenon and it is difficult to eliminate completely, however it is minimized to the acceptable limits. It becomes more severe under off-design conditions and lower tail race level. Shear Stress Transport (SST) turbulence model and Rayleigh-Plesset mass transfer models are used using CFX solver for performing the transient simulation and investigating the cavitation turbulent flow through Francis turbine. An attempt has been carried out to analysis of cavitating flow at low head Francis turbine under different operating conditions having varying suction heads. Experimentation has been carried out to validate the simulation results. It was found that obtained simulation results are very close agreement with experimental results. Summarizing, the performance loss and cavitation rate are found maximum under over load operating conditions. At part load operating conditions of the turbine, high amplitude of pressure at low frequency has been found which may cause fatigue damage to the turbine over time. Cavitation rate, performance loss and magnitude of pressure pulsation increase with increase of suction head.
목차
Abstract
1. Introduction
2. Simulation Methodology
3. Numerical Investigation and Validation of Flow in Hydraulic Turbines
4. Performance Analysis
5. Cavitation Rate
6. Pressure Pulsation
7. Conclusion
References
참고문헌 (15)
참고문헌 신청
Brennan C. E. / 1994 / Hydrodynamics of Pumps / Oxford University Press
Li, S. C. / 2000 / Cavitation of Hydraulic Machinery / Imperial College Press
Arndt R E A / 1989 / Cavitation erosion in hydro turbines / Journal of Hydraulic Engineering 115(10):1297~1315
Bernad Sandor / 2004 / Numerical Simulation of Two-Phase Cavitating Flow in Turbomachines / International Conference on Hydraulic Machinery and Hydrodynamics 4(22):439~446
Bernad Sandor / 2006 / Numerical Analysis of the Cavitating Flows / Proceedings of the Rom Academay Ser A 7(1):1~13
Li, S. C. / 2000 / Cavitation of Hydraulic Machinery / Imperial College Press
Arndt R E A / 1989 / Cavitation erosion in hydro turbines / Journal of Hydraulic Engineering 115(10):1297~1315
Bernad Sandor / 2004 / Numerical Simulation of Two-Phase Cavitating Flow in Turbomachines / International Conference on Hydraulic Machinery and Hydrodynamics 4(22):439~446
Bernad Sandor / 2006 / Numerical Analysis of the Cavitating Flows / Proceedings of the Rom Academay Ser A 7(1):1~13
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UCI(KEPA) : I410-ECN-0101-2019-554-000988081