Journal of Wind Energy (풍력에너지저널)

Korea Wind Energy Association (한국풍력에너지학회)
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Literature Review of Model Testing Techniques for Performance Evaluation of Floating Offshore Wind Turbine in Ocean Basin

부유식 해상풍력 시스템 성능평가를 위한 수조모형시험 기법고찰

  • 하윤진 (선박해양플랜트연구소, 해양에너지연구본부) ;
  • 안현정 (선박해양플랜트연구소, 해양에너지연구본부) ;
  • 박세완 (선박해양플랜트연구소, 해양에너지연구본부) ;
  • 박지용 (선박해양플랜트연구소, 해양에너지연구본부) ;
  • 정동우 (선박해양플랜트연구소, 수조운영실) ;
  • 정재상 (선박해양플랜트연구소, 수조운영실) ;
  • 원영욱 (선박해양플랜트연구소, 수조운영실) ;
  • 한익승 (선박해양플랜트연구소, 해양에너지연구본부) ;
  • 김경환 (선박해양플랜트연구소, 해양에너지연구본부) ;
  • 이종훈 (선박해양플랜트연구소, 해양플랜트연구본부)
  • Received : 2022.08.09
  • Accepted : 2022.10.21
  • Published : 2022.12.30
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Abstract

Three similarities (i.e., geometrical similarity, kinematic similarity and dynamic similarity) between a prototype and model must be satisfied to perform an experiment for a floating offshore wind turbine (FOWT). For dynamic similarity, most of the model tests in ocean engineering basins are performed based on the Froude number, so the scale effect for the wind turbine of an FOWT occurs by different Reynolds numbers between the prototype and model. In this study, various model test techniques for overcoming the scale effect of the wind turbine part of the FOWT are investigated. Firstly, model test techniques using simple approaches are reviewed, and the advantages and disadvantages of the simple approaches are summarized. Secondly, the model test techniques in recent projects that apply improved approaches are introduced including advantages and disadvantages. Finally, new approaches applying digitalization are reviewed, and the characteristics of the new approaches are introduced.

본 연구에서는 부유식 해상풍력 성능평가 모형시험기법들을 소개하였으며, 이들의 특성 그리고 장단점들을 분석하였다. "Table 4"에 각 모형시험 기법의 기술과 특징들을 요약하여 나타내었다. 풍속증가법, 난류촉진법 그리고 등가추력 원판 방법들은 부유식 해상풍력 시스템에 대한 수조모형시험성능평가 시 터빈성능에 대한 모사의 한계가 있으나 간단히 적용이 가능하기 때문에 일부 시험 조건에서는 빠르게 적용해볼 수 있다. 블레이드 재설계법은 다소 진보된 모형시험 기법이나 큰 비용이 요구되며, 블레이드의 피치제어를 고려하기 어렵다는 단점이 있다. 실시간 복합모형시험 기법은 기술적인 난이도가 높으나, 난류 바람장을 포함한 다양한 풍속 조건들을 고려할 수 있고 기존의 수조모형시험 기법에서는 고려하기 어려운 터빈 블레이드 제어에 의한 하중도 모사가 가능하다. 그뿐만 아니라 실제 터빈에 대한 수치해석이 직접적으로 적용되기 때문에 부유식 해상풍력터빈의 긴급정지 또는 돌풍(Wind Gust) 조건들과 같은 특정 이벤트 조건에 대한 성능평가도 가능하다 [32].

Keywords

Acknowledgement

본 연구는 선박해양플랜트연구소(KRISO) 주요사업인 "일체형 해양그린수소 생산시스템 핵심기술 개발"의 지원으로 수행되었으며, 연구비 지원에 감사드립니다(PES4361).

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