Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Study on Optimal Design of Wind Turbine Blade Airfoil and Its Application

풍력발전기 블레이드의 에어포일 최적 설계 및 그 적용 연구

  • Sun, Min-Young (Dept. of Energy Engineering, Chonbuk Nat‘l Univ.) ;
  • Kim, Dong-Yong (Dept. of Energy Engineering, Chonbuk Nat‘l Univ.) ;
  • Lim, Jae-Kyoo (School of Mechanical Design Engineering, Chonbuk Nat‘l Univ., Advanced Wind Power System Research Center, Chonbuk Nat’l Univ.)
  • 선민영 (전북대학교 에너지공학과) ;
  • 김동용 (전북대학교 에너지공학과) ;
  • 임재규 (전북대학교 기계설계학과, 전북대학교 차세대풍력발전연구센터)
  • Received : 2011.06.07
  • Accepted : 2012.02.13
  • Published : 2012.05.01
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Abstract

This study was carried out with two goals. One was the development of a model of a wind turbine blade airfoil and the other was the application of this folding blade. In general, in large-sized (MW) wind turbines, damage is prevented because of the use of a pitch control system. On the other hand, pitch control is not performed in small wind turbines since equipment costs and maintenance costs are high, and therefore, the blade will cause serious damage. The wind turbine proposed in this study does not require maintenance, and the blades do not break during high winds because they are folded in accordance with changes in the wind speed. But generators are not cut-out, while maintaining a constant angle will continue to produce. The focus of this study, the wind turbine is continued by folding blade system in strong winds and gusts without stopping production.

본 연구는 두 가지 목표를 가지고 수행하였다. 하나는 수치해석과 Design-FOIL Pro.를 이용해 블레이드 에어포일 모델개발이고, 다른 하나는 이 모델을 Folding blade에 적용하는 것이다. 일반적으로 1MW이상 대형풍력터빈용 블레이드는 강풍시에 피칭제어로 풍향에 대해서 평형상태를 유지하여 로터를 회전시키지 않는 방법으로 블레이드의 손상을 방지 하였지만, 소형풍력터빈용 블레이드는 설비비, 유지비등 경제성을 이유로 피칭제어를 채택하지 않아 블레이드의 파손 문제가 심각하다. 그래서 본 연구에서는 유지보수가 필요 없고 강풍에서도 파손이 없는 Spring pack을 이용한 로터를 직접설계(Direct-Design) 방법으로 설계하여, 그 성능을 검증 하고 변화 풍속에 맞는 폴딩각을 이용해 강풍시에도 Wind turbine이 Cut-out 없이 계속발전을 유지할 수 있도록 하는 점에 집중 연구하고자 한다.

Keywords

References

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