Computational Flow Analysis on Improvement Effect of Wind Shear by a Structure Installed Upstream of a Wind Turbine

풍력발전기 풍상부 지면설치 구조물에 의한 풍속전단 개선효과의 전산유동해석

  • 김현구 (한국에너지기술연구원 풍력발전연구단) ;
  • 우상우 (한국에너지기술연구원 풍력발전연구단) ;
  • 장문석 (한국에너지기술연구원 풍력발전연구단) ;
  • 신형기 (한국에너지기술연구원 풍력발전연구단)
  • Published : 2008.05.22

Abstract

This study demonstrates the advantages of a shear-free structure designed to modify vertical profiles of wind speed in the atmospheric surface layer. Computational fluid dynamics(CFD) software, FLUENT is used to interpret the velocity field modification around the structure and wind turbine. The shapes of shear-free structure, installed at upstream toward prevailing wind direction, would be fences, buildings and trees, etc. According to the simulation results, it is obvious that wind shear between heights of wind turbine's blades is decreased together with a speed-up advantage. This would lead decrease of periodic wind loading caused by wind shear and power-out increase by flow uniformity and wind speed-up.

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