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Numerical Analysis for the Optimum Design of Shroud Tidal Stream Generation System

쉬라우드 조류 발전 시스템 상부 두께 변화에 따른 유속 변화에 관한 연구

  • Lee, Uk Jae (Department of Civil and Environmental Engineering, Wonkwang University) ;
  • Lee, Sang Ho (Division of Mechanical and Automotive Engineering, Wonkwang University) ;
  • Han, Seok Jong (Division of Mechanical and Automotive Engineering, Wonkwang University) ;
  • Jeong, Shin Taek (Department of Civil and Environmental Engineering, Wonkwang University) ;
  • Choi, Hyuk Jin (Department of Civil and Environmental Engineering, Wonkwang University) ;
  • Ko, Dong Hui (Coastal Development Research Center, Korea Institute of Ocean Science & Technology)
  • 이욱재 (원광대학교 토목환경공학과) ;
  • 이상호 (원광대학교 기계자동차 공학부) ;
  • 한석종 (원광대학교 기계자동차 공학부) ;
  • 정신택 (원광대학교 토목환경공학과) ;
  • 최혁진 (원광대학교 토목환경공학과) ;
  • 고동휘 (한국해양과학기술원 연안개발연구센터)
  • Received : 2018.03.26
  • Accepted : 2018.06.26
  • Published : 2018.06.30

Abstract

Numerical simulations were carried out to investigate the flow velocity changes in the flow field due to the variation in the thickness of the upper part of the shroud tidal power generation system. In this study, it was performed under constant flow velocity condition. In addition, performance analysis of shroud was performed under the same conditions. As the height of the upper part increases, the flow velocity rate gradually increases, and it tends to decrease at a certain height. As a result of analyzing the shape of the blade and the shape of the blade combined with the shroud, the torque of the blade increased due to the increase of the flow rate by the shroud system. It is expected that the shape of the structure obtained by this study and the analysis of the flow velocity distribution in the flow field can provide the data necessary for the development of an efficient shroud tidal power generation system.

쉬라우드 조류 발전 시스템 상부 두께 변화에 따른 유동장 내 유속 변화 연구를 위해 수치 모의실험을 통하여 분석하였다. 본 연구는 일정한 조류 속도 조건에서 수행하였으며, 같은 조건으로 쉬라우드의 성능 분석을 추가 수행하였다. 상부 높이가 증가할수록 유속 변화율은 점차 증가하는 양상을 보였으며, 일정 높이에서 재차 감소하는 경향을 보였다. 또한, 쉬라우드의 성능 평가를 위해 블레이드를 단독 설치한 경우와 쉬라우드와 결합한 형상을 분석한 결과, 쉬라우드 시스템에 의한 유속 증가로 블레이드의 회전력은 증가하였다. 본 연구를 통해 얻은 구조물의 형상과 유동장 내의 유속 분포에 대한 분석 결과는 효율적인 쉬라우드 조류 발전 시스템 개발에 필요한 자료를 제시할 수 있을 것으로 기대된다.

Keywords

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