New & Renewable Energy (신재생에너지)

Korean Society for New and Renewable Energy (한국신·재생에너지학회)
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Prediction Method for Trailing-edge Serrated Wind Turbine Noise

풍력발전기 톱니형 뒷전 블레이드 소음 예측 기법

  • Han, Dongyeon (Department of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Choi, Jihoon (Department of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Lee, Soogab (Institute of Engineering Research at Seoul National University, Seoul National University)
  • Received : 2019.04.22
  • Accepted : 2020.05.25
  • Published : 2020.06.25
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Abstract

The reduction of noise from wind turbines has been studied using various methods. Some examples include controlling wind turbine blades, designing low-noise-emitting wind turbine blades, and using trailing-edge serrations. Among these methods, serration is considered an effective noise reduction method. Various studies have aimed to understand the effects of trailing-edge serration parameters. Most studies, however, have focused on fixed-wing concepts, and few have analyzed noise reduction or developed a prediction method for rotor-type blades. Herein, a noise prediction method, composed of two noise prediction methods for a wind turbine with trailing-edge serrations, is proposed. From the flow information obtained by an in-house program (WINFAS), the noise from non-serrated blades is calculated by turbulent ingestion noise and airfoil self-noise prediction methods. The degree of noise reduction caused by the trailing-edge serrations is predicted in the frequency domain by Lyu's method. The amount of noise reduction is subtracted from the predicted result of the non-serrated blade and the total reduction of the noise from the rotor blades is calculated.

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References

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