Aeroacoustic Calculations of Wind Turbine Noise with the Actuator Line/ Navier-Stokes Technique

Harald Debertshäuser, Wen Zhong Shen, Wei Jun Zhu

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Abstract

Noise regulations in many countries are becoming extremely strict and wind turbine noise is thus becoming a barrier for further development of onshore wind turbines. Low noise wind turbine airfoil and blade design is an important technique for noise reduction. However, the ow situation of a wind turbine in wind farms is very complicated. In order to accurately model the noise generation and propagation from wind turbines in wind farms,it is urgent to develop a high-fidelity noise model to predict the noise features in complex situations. In the present study, we develop a flow-acoustic splitting technique where the wind turbine flow is calculated by using the in-house actuator line/LES/Navier-Stokes technique and the acoustics is obtained by solving the acoustic perturbation equations. In the flow solver, the wind turbine blades are modelled by rotating lines with body forces determined according to the local conditions and airfoil data. In the acoustic solver, the aeroacoustics is simulated by: (1) calculating the noise source using the improved engineering model (IBPM) based on the model developed by Brook, Pope and Marcolini (BPM); (2) introducing the noise source with an expected range of frequencies along the blade lines in the acoustic solver; (3) solving the acoustic perturbation equations with the introduced source and the source captured in the flow. The model can be used to study the prediction and propagation of low-frequency noise in complex situations. Noise generated by a wind turbine with and without yaw under wind shear and inflow turbulence will be presented in the paper.
Original languageEnglish
Title of host publicationProceedings of the 34th Wind Energy Symposium
Number of pages13
PublisherAmerican Institute of Aeronautics and Astronautics
Publication date2016
Article numberAIAA 2016-0750
DOIs
Publication statusPublished - 2016
Event34th Wind Energy Symposium - San Diego, CA, United States
Duration: 4 Jan 20168 Jan 2016
Conference number: 34
http://arc.aiaa.org/doi/book/10.2514/MWES16

Conference

Conference34th Wind Energy Symposium
Number34
CountryUnited States
CitySan Diego, CA
Period04/01/201608/01/2016
Internet address

Cite this

Debertshäuser, H., Shen, W. Z., & Zhu, W. J. (2016). Aeroacoustic Calculations of Wind Turbine Noise with the Actuator Line/ Navier-Stokes Technique. In Proceedings of the 34th Wind Energy Symposium [AIAA 2016-0750] American Institute of Aeronautics and Astronautics. https://doi.org/10.2514/6.2016-0750