Journal of the Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회논문집)

Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회)
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Power Coefficient and Pressure Distributions on Blade Surfaces of a Wind Turbine with Tiltable Blades by 3D Simulations

날개 틸팅형 풍력발전기의 출력과 날개 표면의 압력분포에 대한 3차원 유동 해석

  • 정창도 (서울과학기술대 에너지환경대학원) ;
  • 배현우 (서울과학기술대 일반대학원) ;
  • 성재용 (서울과학기술대 기계자동차공학과)
  • Received : 2020.01.06
  • Accepted : 2020.02.21
  • Published : 2020.03.01
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Abstract

In this study, a new shape of wind turbine with horizontal axis has been proposed. The proposed wind turbine has two pairs of 3 tiltable blades which minimizes air resistance during the reverse rotational direction. Under a given wind speed, 3D numerical simulations on tiltable blades were performed for various TSRs(tip-speed-ratios). Four cases of rotational position was considered to analyze the torque and wind power generated on the blade surfaces. The results show that the maximum wind power occurs at the TSR of 0.2. Due to the blade tilting, the wind passes through the blade without air resistance at the reverse rotational direction. The torque is mainly caused by pressure differences between the front and rear surface of the blade, and it becomes maximum when the blade is located at the azimuth angle of 330°.

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References

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