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Trailing-Edge Noise and Amplitude Modulation Under Yaw-Induced Partial Wake: A Curl–UVLM Analysis with Atmospheric Stability Effects.

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Title: Trailing-Edge Noise and Amplitude Modulation Under Yaw-Induced Partial Wake: A Curl–UVLM Analysis with Atmospheric Stability Effects.
Authors: Kim, Homin1 (AUTHOR), Yuk, Taeseok1,2 (AUTHOR), Yu, Kukhwan2,3 (AUTHOR), Lee, Soogab1,3 (AUTHOR) solee@snu.ac.kr
Source: Energies (19961073). Oct2025, Vol. 18 Issue 19, p5205. 27p.
Subjects: Amplitude modulation, Vortex lattice method, Aerodynamic noise, Acoustics, Vortex motion, Weather
Abstract: This study examines the effects of partial wakes caused by upstream turbine yaw control on the trailing-edge noise of a downstream turbine under stable and neutral atmospheric conditions. Using a combined model coupling the unsteady vortex lattice method (UVLM) with the Curl wake model, calibrated with large eddy simulation data, wake behavior and noise characteristics were analyzed for yaw angles from −30° to +30°. Results show that partial wakes slightly raise overall noise levels and lateral asymmetry of trailing-edge noise, while amplitude modulation (AM) strength is more strongly influenced by yaw control. AM varies linearly with wake deflection at moderate yaw angles but behaves nonlinearly beyond a threshold due to large wake deflection and deformation. Findings reveal that yaw control can significantly increase the lateral asymmetry in the AM strength directivity pattern of the downstream turbine, and that AM characteristics depend on the complex interplay between inflow distribution and convective amplification effects, highlighting the importance of accurate wake prediction, along with appropriate consideration of observer point location and blade rotation, for evaluating AM characteristics of a wind turbine influenced by a partial wake. [ABSTRACT FROM AUTHOR]
Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Label: Title
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  Data: Trailing-Edge Noise and Amplitude Modulation Under Yaw-Induced Partial Wake: A Curl–UVLM Analysis with Atmospheric Stability Effects.
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  Data: <searchLink fieldCode="AR" term="%22Kim%2C+Homin%22">Kim, Homin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yuk%2C+Taeseok%22">Yuk, Taeseok</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yu%2C+Kukhwan%22">Yu, Kukhwan</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lee%2C+Soogab%22">Lee, Soogab</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> solee@snu.ac.kr</i>
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  Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Oct2025, Vol. 18 Issue 19, p5205. 27p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Amplitude+modulation%22">Amplitude modulation</searchLink><br /><searchLink fieldCode="DE" term="%22Vortex+lattice+method%22">Vortex lattice method</searchLink><br /><searchLink fieldCode="DE" term="%22Aerodynamic+noise%22">Aerodynamic noise</searchLink><br /><searchLink fieldCode="DE" term="%22Acoustics%22">Acoustics</searchLink><br /><searchLink fieldCode="DE" term="%22Vortex+motion%22">Vortex motion</searchLink><br /><searchLink fieldCode="DE" term="%22Weather%22">Weather</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study examines the effects of partial wakes caused by upstream turbine yaw control on the trailing-edge noise of a downstream turbine under stable and neutral atmospheric conditions. Using a combined model coupling the unsteady vortex lattice method (UVLM) with the Curl wake model, calibrated with large eddy simulation data, wake behavior and noise characteristics were analyzed for yaw angles from −30° to +30°. Results show that partial wakes slightly raise overall noise levels and lateral asymmetry of trailing-edge noise, while amplitude modulation (AM) strength is more strongly influenced by yaw control. AM varies linearly with wake deflection at moderate yaw angles but behaves nonlinearly beyond a threshold due to large wake deflection and deformation. Findings reveal that yaw control can significantly increase the lateral asymmetry in the AM strength directivity pattern of the downstream turbine, and that AM characteristics depend on the complex interplay between inflow distribution and convective amplification effects, highlighting the importance of accurate wake prediction, along with appropriate consideration of observer point location and blade rotation, for evaluating AM characteristics of a wind turbine influenced by a partial wake. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Energies (19961073) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.3390/en18195205
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      – Code: eng
        Text: English
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        PageCount: 27
        StartPage: 5205
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      – SubjectFull: Amplitude modulation
        Type: general
      – SubjectFull: Vortex lattice method
        Type: general
      – SubjectFull: Aerodynamic noise
        Type: general
      – SubjectFull: Acoustics
        Type: general
      – SubjectFull: Vortex motion
        Type: general
      – SubjectFull: Weather
        Type: general
    Titles:
      – TitleFull: Trailing-Edge Noise and Amplitude Modulation Under Yaw-Induced Partial Wake: A Curl–UVLM Analysis with Atmospheric Stability Effects.
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            NameFull: Kim, Homin
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            NameFull: Yuk, Taeseok
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            NameFull: Yu, Kukhwan
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            NameFull: Lee, Soogab
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            – D: 01
              M: 10
              Text: Oct2025
              Type: published
              Y: 2025
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              Value: 18
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              Value: 19
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            – TitleFull: Energies (19961073)
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