Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Noise Source of Large Wind Turbine

대형 풍력발전기 소음원 분석

  • Shin, Hyung-Ki (Wind Energy Research Center, Korea Institute of Energy Research) ;
  • Bang, Hyung-Jun (Wind Energy Research Center, Korea Institute of Energy Research)
  • 신형기 (한국에너지기술연구원 풍력발전연구센터) ;
  • 방형준 (한국에너지기술연구원 풍력발전연구센터)
  • Published : 2009.08.31
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Abstract

Wind turbine noise become main environmental problem as wind energy have been installed all around. Noise from large wind turbine give annoyance to listener, moreover it increase loading to whole system by restricting blade tip speed. However accurate noise mechanism of wind turbine is not yet examined. This paper reviewed noise source and analysis theory. Broadband noise if main component of wind turbine noise and airfoil self noise is main noise source. These make acoustic analogy hard to apply for analysis. For this reason, experimental equation is method for wind turbine noise prediction up to now. Spectrum analysis shows that vortex shedding noise exists around $1k{\sim}2k$ Hz. This region is most sensitive frequency range to human. Thus it is necessary to reduce this noise source.

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References

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