Journal of the Korean Society for Marine Environment & Energy (한국해양환경ㆍ에너지학회지)

The Korean Society for Marine Environment and Energy (한국해양환경•에너지학회)
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A Numerical Study on Tip Rake HAT Impeller Performance for Tidal Stream Power

조류발전용 팁 레이크 HAT 임펠러 성능 수치해석 연구

  • Shin, Byung-Chul (Department of Naval Architecture & Ocean Engineering, Pusan National University) ;
  • Kim, Moon-Chan (Department of Naval Architecture & Ocean Engineering, Pusan National University) ;
  • Do, In-Rok (Department of Naval Architecture & Ocean Engineering, Pusan National University) ;
  • Rhee, Shin-Hyung (Department of Naval Architecture & Ocean Engineering, Seoul National University) ;
  • Hyun, Beom-Soo (Division of Naval Architecture & Ocean Systems Engineering, Korea Maritime University) ;
  • Song, Mu-Seok (Department of Naval Architecture & Ocean Engineering, Hongik University)
  • 신병철 (부산대학교 조선해양공학과) ;
  • 김문찬 (부산대학교 조선해양공학과) ;
  • 도인록 (부산대학교 조선해양공학과) ;
  • 이신형 (서울대학교 조선해양공학부) ;
  • 현범수 (한국해양대학교 조선해양시스템공학부) ;
  • 송무석 (홍익대학교 조선해양공학과)
  • Received : 2010.07.12
  • Accepted : 2010.11.22
  • Published : 2010.11.25
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Abstract

The present study deals with the investigation about the improvement of performance of tidal stream turbine blade (HAT) with tip rake. HAT impeller has sometimes experienced noise and vibration by Tip vortex which causes even erosion and severe efficiency loss to the blade, The newly proposed tip rake impeller can make the tip vortex week compared with a normal impeller by preventing the three dimensional effect at tip region. In order to find out the optimum rake impeller, three cases have been designed and the performance of the designed rake impellers has been validated by the commercial CFD code(Fluent). The efficiency of optimized rake impeller was up to 4.6% higher than the conventional impeller. The more parametric study for high efficiency and good cavitation performance is expected to be conducted in a near future.

조류발전용 HAT 임펠러에 팁 레이크를 적용하여 임펠러 성능을 고찰해 보았다. 기존의 조류발전용 임펠러는 날개 끝 보오텍스에 의해 효율 감소로 인한 전력 손실 뿐 아니라 소음 및 진동에 의한 설치해역 주변의 해양 생태계 파괴의 우려가 있다. 임펠러 날개 끝에 레이크를 적용함으로써 효율의 개선과 함께 소음 및 진동 저감 효과를 파악하고자 하였다. 향후 레이크 비율에 따른 효율증가 및 캐비테이션 성능 향상에 대한 최적화를 수행할 계획이다.

Keywords

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