• 제목/요약/키워드: Aerodynami

검색결과 2건 처리시간 0.019초

블레이드 통과 주파수 소음과 지연시간을 고려한 중.대형 수평축 풍력발전기의 공력소음해석 (Medium.Large Horizontal Axis Wind Turbine Noise Analysis Considering Blade Passing Frequency Noise and Retarded Time)

  • 김현정;김호건;이수갑
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2007년도 추계학술대회논문집
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    • pp.1490-1493
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    • 2007
  • Aerodynamic noise generated from wind turbines is predicted by it's classified source mechanisms using computational method. BPF noise according to the blade passing motion, is modelled on monopole and dipole sources. They are predicted by Farassat 1A equation. Airfoil self noise and turbulence ingestion noise are modelled upon quadrupole sources and are predicted by semi-empirical formulas composed on the groundwork of Brooks et al. and Lowson. Retarded time is considered, not only in low frequency noise prediction but also in turbulence ingestion noise and airfoil self noise prediction. Wind turbine noise emission of a 3MW wind turbine and a 600 kW wind turbine, standing for large and middle sized wind turbines, is analyzed.

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