Effects of wind turbine wake on atmospheric sound propagation

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Abstract

In this paper, we investigate the sound propagation from a wind turbine considering the effects of wake-induced velocity deficit and turbulence. In order to address this issue, an advanced approach was developed in which both scalar and vector parabolic equations in two dimensions are solved. Flow field input was obtained using the actuator line (AL) technique with Large Eddy Simulation (LES) to model the wind turbine and its wake and from an analytical wake model. The effect of incoming wind speed and atmospheric stability was investigated with the analytical wake input using a single point source. Unsteady acoustic simulations were carried out with the AL/LES input for three cases with different incoming turbulence intensity, and a moving source approach to mimic the rotating turbine blades. The results show a non-negligible effect of the wake on far-field noise prediction. Particularly under stable atmospheric conditions, SPL amplification reaches up to 7.5dB at the wake centre. Furthermore, it was observed that when the turbulence intensity level of the incoming flow is higher, the SPL difference between the moving and the steady source is lower.
Original languageEnglish
JournalApplied Acoustics
Volume122
Pages (from-to)51-61
ISSN0003-682X
DOIs
Publication statusPublished - 2017

Cite this

@article{89de6751ca3c41dd88c55c8ca7babde3,
title = "Effects of wind turbine wake on atmospheric sound propagation",
abstract = "In this paper, we investigate the sound propagation from a wind turbine considering the effects of wake-induced velocity deficit and turbulence. In order to address this issue, an advanced approach was developed in which both scalar and vector parabolic equations in two dimensions are solved. Flow field input was obtained using the actuator line (AL) technique with Large Eddy Simulation (LES) to model the wind turbine and its wake and from an analytical wake model. The effect of incoming wind speed and atmospheric stability was investigated with the analytical wake input using a single point source. Unsteady acoustic simulations were carried out with the AL/LES input for three cases with different incoming turbulence intensity, and a moving source approach to mimic the rotating turbine blades. The results show a non-negligible effect of the wake on far-field noise prediction. Particularly under stable atmospheric conditions, SPL amplification reaches up to 7.5dB at the wake centre. Furthermore, it was observed that when the turbulence intensity level of the incoming flow is higher, the SPL difference between the moving and the steady source is lower.",
author = "Emre Barlas and Zhu, {Wei Jun} and Shen, {Wen Zhong} and Kelly, {Mark C.} and Andersen, {S{\o}ren Juhl}",
year = "2017",
doi = "10.1016/j.apacoust.2017.02.010",
language = "English",
volume = "122",
pages = "51--61",
journal = "Applied Acoustics",
issn = "0003-682X",
publisher = "Pergamon Press",

}

Effects of wind turbine wake on atmospheric sound propagation. / Barlas, Emre; Zhu, Wei Jun; Shen, Wen Zhong; Kelly, Mark C.; Andersen, Søren Juhl.

In: Applied Acoustics, Vol. 122, 2017, p. 51-61.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Effects of wind turbine wake on atmospheric sound propagation

AU - Barlas, Emre

AU - Zhu, Wei Jun

AU - Shen, Wen Zhong

AU - Kelly, Mark C.

AU - Andersen, Søren Juhl

PY - 2017

Y1 - 2017

N2 - In this paper, we investigate the sound propagation from a wind turbine considering the effects of wake-induced velocity deficit and turbulence. In order to address this issue, an advanced approach was developed in which both scalar and vector parabolic equations in two dimensions are solved. Flow field input was obtained using the actuator line (AL) technique with Large Eddy Simulation (LES) to model the wind turbine and its wake and from an analytical wake model. The effect of incoming wind speed and atmospheric stability was investigated with the analytical wake input using a single point source. Unsteady acoustic simulations were carried out with the AL/LES input for three cases with different incoming turbulence intensity, and a moving source approach to mimic the rotating turbine blades. The results show a non-negligible effect of the wake on far-field noise prediction. Particularly under stable atmospheric conditions, SPL amplification reaches up to 7.5dB at the wake centre. Furthermore, it was observed that when the turbulence intensity level of the incoming flow is higher, the SPL difference between the moving and the steady source is lower.

AB - In this paper, we investigate the sound propagation from a wind turbine considering the effects of wake-induced velocity deficit and turbulence. In order to address this issue, an advanced approach was developed in which both scalar and vector parabolic equations in two dimensions are solved. Flow field input was obtained using the actuator line (AL) technique with Large Eddy Simulation (LES) to model the wind turbine and its wake and from an analytical wake model. The effect of incoming wind speed and atmospheric stability was investigated with the analytical wake input using a single point source. Unsteady acoustic simulations were carried out with the AL/LES input for three cases with different incoming turbulence intensity, and a moving source approach to mimic the rotating turbine blades. The results show a non-negligible effect of the wake on far-field noise prediction. Particularly under stable atmospheric conditions, SPL amplification reaches up to 7.5dB at the wake centre. Furthermore, it was observed that when the turbulence intensity level of the incoming flow is higher, the SPL difference between the moving and the steady source is lower.

U2 - 10.1016/j.apacoust.2017.02.010

DO - 10.1016/j.apacoust.2017.02.010

M3 - Journal article

VL - 122

SP - 51

EP - 61

JO - Applied Acoustics

JF - Applied Acoustics

SN - 0003-682X

ER -