风力机气动噪声合成中的传播效应

IF 1 3区 物理与天体物理 Q4 ACOUSTICS
David Mascarenhas, B. Cotté, O. Doaré
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引用次数: 0

摘要

风力涡轮机辐射的声场随传播距离的变化明显,这取决于气象条件和地面类型。本文提出了一种基于理论噪声源和传播模型的风力机噪声综合模型。源模型是基于amiet理论对尾缘噪声和湍流流入噪声的预测。尾缘噪声采用lee模型计算吸力侧的壁面压力谱,goody模型计算压力侧的壁面压力谱。利用柯尔莫哥洛夫谱对湍流入流噪声进行了预测。为了考虑与大气折射和地面反射相关的传播效应,考虑了非均匀运动介质中的广角抛物方程。由大气湍流引起的散射用Harmonoise模型来解释。该合成方法基于移动单极子模型准确预测接收机的调幅,并利用重叠颗粒间的交叉衰落从频域预测模型中获得时间信号。最后,提供了几个测试用例的音频信号,以强调与风力涡轮机噪声相关的各种传播现象。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Propagation effects in the synthesis of wind turbine aerodynamic noise
The sound field radiated by a wind turbine changes significantly with propagation distance, depending on the meteorological conditions and on the type of ground. In this article, we present a wind turbine noise synthesis model which is based on theoretical source and propagation models. The source model is based on Amietâ’s theory for the prediction of the trailing edge noise and the turbulent inflow noise. The trailing edge noise uses the wall pressure spectrum calculated with Leeâ’s model for the suction side and Goodyâ’s model for the pressure side. The Kolmogorov spectrum is used for the prediction of the turbulent inflow noise. To account for the propagation effects associated with atmospheric refraction and ground reflection, a wide angle parabolic equation in inhomogeneous moving medium is considered. The scattering due to the turbulence in the atmosphere is accounted for using the Harmonoise model. The synthesis method is based on the moving monopole model to accurately predict the amplitude modulations at the receiver, and uses cross-fading between overlapping grains to obtain the time signals from the frequency-domain prediction model. Finally, audio signals are provided for a few test cases to emphasize various propagation phenomena associated with wind turbine noise.
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来源期刊
Acta Acustica
Acta Acustica ACOUSTICS-
CiteScore
2.80
自引率
21.40%
发文量
0
审稿时长
12 weeks
期刊介绍: Acta Acustica, the Journal of the European Acoustics Association (EAA). After the publication of its Journal Acta Acustica from 1993 to 1995, the EAA published Acta Acustica united with Acustica from 1996 to 2019. From 2020, the EAA decided to publish a journal in full Open Access. See Article Processing charges. Acta Acustica reports on original scientific research in acoustics and on engineering applications. The journal considers review papers, scientific papers, technical and applied papers, short communications, letters to the editor. From time to time, special issues and review articles are also published. For book reviews or doctoral thesis abstracts, please contact the Editor in Chief.
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