Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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Study on Load Reduction of a Tidal Steam Turbine Using a Flapped Blade

플랩 블레이드를 이용한 조류 터빈의 부하 저감에 대한 연구

  • Jeong, Dasom (Major of Mechanical Engineering, College of Engineering, Jeju National University) ;
  • Ko, Jin Hwan (Major of Mechanical Engineering, College of Engineering, Jeju National University)
  • 정다솜 (제주대학교 공과대학 기계공학전공) ;
  • 고진환 (제주대학교 공과대학 기계공학전공)
  • Received : 2020.07.13
  • Accepted : 2020.09.25
  • Published : 2020.12.30
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Abstract

Blades of tidal stream turbines have to sustain many different loads during operation in the underwater environment, so securing their structural safety is a key issue. In this study, we focused on periodic loads due to wave orbital motion and propose a load reduction method with a blade design. The flap of an airplane wing is a well-known structure designed to increase lift, and it can also change the load distribution on the wing through deflection. For this reason, we adopted a passive flap structure for the load reduction and investigated its effectiveness by an analytical method based on the blade element moment theory. Flap torsional stiffness required for the design of the passive flap can be obtained by calculating the flap moment based on the analytic method. Comparison between a flapped and a fixed blade showed the effect of the flap on load reduction in a high amplitude wave condition.

Keywords

Acknowledgement

이 논문은 2020학년도 제주대학교 교원성과지원사업에 의하여 연구되었습니다. 그리고 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원(No.2020R1A2C1102994)과 산업통상자원부(MOTIE)의 재원으로 한국에너지기술평가원의 지원(No. 20184030202200)을 받아 수행한 연구 성과입니다.

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