한국수소및신에너지학회논문집 (Journal of Hydrogen and New Energy)

  • 제31권3호
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  • Pages.328-336
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  • 2020
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  • 1738-7264(pISSN)
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  • 2288-7407(eISSN)
한국수소및신에너지학회 (The Korean Hydrogen and New Energy Society)
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프란시스 수차 모델의 러너 간극에 따른 내부유동 및 성능 특성

Internal Flow and Performance Characteristics According to the Runner Gap of a Francis Turbine Model

  • 김승준 (과학기술연합대학원대학교 생산기술(청정공정.에너지시스템공학) 전공) ;
  • 최영석 (과학기술연합대학원대학교 생산기술(청정공정.에너지시스템공학) 전공) ;
  • 조용 (한국수자원공사 K-water 융합연구원) ;
  • 최종웅 (한국수자원공사 K-water 융합연구원) ;
  • 현정재 (한국수자원공사 K-water 융합연구원) ;
  • 주원구 (연세대학교 기계공학과) ;
  • 김진혁 (과학기술연합대학원대학교 생산기술(청정공정.에너지시스템공학) 전공)
  • KIM, SEUNG-JUN (Industrial Technology (Green Process and Energy System Engineering), Korea University of Science & Technology) ;
  • CHOI, YOUNG-SEOK (Industrial Technology (Green Process and Energy System Engineering), Korea University of Science & Technology) ;
  • CHO, YONG (K-water Convergence Institute, Korea Water Resources Corporation) ;
  • CHOI, JONG-WOONG (K-water Convergence Institute, Korea Water Resources Corporation) ;
  • HYUN, JUNG-JAE (K-water Convergence Institute, Korea Water Resources Corporation) ;
  • JOO, WON-GU (Department of Mechanical Engineering, Yonsei University) ;
  • KIM, JIN-HYUK (Industrial Technology (Green Process and Energy System Engineering), Korea University of Science & Technology)
  • 투고 : 2020.05.16
  • 심사 : 2020.06.30
  • 발행 : 2020.06.30
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초록

In the Francis turbine, the leakage flow through the runner gaps which are between the runner and the stator structure influences the internal flow and hydraulic performance. Thus, the investigation for the flow characteristics induced by the runner gaps is important. However, the runner gaps are often disregarded by considering the time and cost of the numerical analysis. Therefore, in this study, the flow characteristics according to runner gaps of the Francis turbine model were investigated including the leakage flow of the runner cone. The three-dimensional unsteady Reynolds-averaged Navier-Stokes analyses were conducted using a scale-adaptive simulation shear stress transport as a turbulence model for observing the influence of the leakage flow on the internal flow and hydraulic performance. The efficiencies were decreased slightly with runner gaps; and the complicated flows were captured in the gaps.

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참고문헌

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