Modeling a wind turbine sound field involves taking into account the main aeroacoustic sources that are generally dominant for modern wind turbines, as well as environmental phenomena such as atmospheric conditions and ground properties that are variable in both time and space. A crucial step to obtain reliable predictions is to estimate the relative influence of environmental parameters on acoustic emission and propagation, in order to determine the parameters that induce the greatest variability on sound pressure level. Thus, this study proposes a Morris sensitivity analysis of a wind turbine noise emission model combined with a sound propagation model in downwind conditions. The emission model is based on Amiet's theory and propagation effects are modeled by the wide-angle parabolic equation. The whole simulation takes into account ground effects (absorption through acoustic impedance and scattering through surface roughness) and micrometeorological effects (mean refraction through the vertical gradient of effective sound speed). The final results show that the parameters involved in atmospheric refraction and in ground absorption have a significant influence on sound pressure level. On the other hand, in the context of this study the relative air humidity and the ground roughness parameters appear to be negligible on sound pressure level sensitivity.
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December 2020
December 11 2020
Environmental parameters sensitivity analysis for the modeling of wind turbine noise in downwind conditions
Bill Kayser
;
Bill Kayser
a)
1
Unité Mixte de Recherche en Acoustique Environnementale, Université Gustave Eiffel, Cerema, Allée des Ponts et Chaussées Route de la Bouaye
, 44340 Bouguenais, France
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Benjamin Cotté;
Benjamin Cotté
2
Institut des Sciences de la Mécanique et Applications, École Nationale Supérieure de Techniques Avancées Paris, Centre National de la Recherche Scientifique, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Électricité de France, Institut Polytechnique Paris
, Paris, France
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David Ecotière;
David Ecotière
3
Unité Mixte de Recherche en Acoustique Environnementale, Cerema, Université Gustave Eiffel
, 11, rue Jean Mentelin–Boîte Postale 9, 67035 Strasbourg, France
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Benoit Gauvreau
Benoit Gauvreau
1
Unité Mixte de Recherche en Acoustique Environnementale, Université Gustave Eiffel, Cerema, Allée des Ponts et Chaussées Route de la Bouaye
, 44340 Bouguenais, France
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a)
Also at: UMRAE, Cerema, Université Gustave Eiffel, 11, rue Jean Mentelin–BP 9, 67035 Strasbourg, France. Electronic mail: bill.kayser@ifsttar.fr, ORCID: 0000-0002-3403-2540.
J. Acoust. Soc. Am. 148, 3623–3632 (2020)
Article history
Received:
February 21 2020
Accepted:
November 13 2020
Citation
Bill Kayser, Benjamin Cotté, David Ecotière, Benoit Gauvreau; Environmental parameters sensitivity analysis for the modeling of wind turbine noise in downwind conditions. J. Acoust. Soc. Am. 1 December 2020; 148 (6): 3623–3632. https://doi.org/10.1121/10.0002872
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