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Atmospheric sound propagation modeling with the Harmonoise model applied to wind turbine noise

Bouma, L.J. (2023) Atmospheric sound propagation modeling with the Harmonoise model applied to wind turbine noise.

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Abstract:The wind power industry is rapidly growing worldwide, thereby reducing our reliance on fossil fuels. However, as the number of wind turbines increases, so too does noise pollution. This causes annoyance and even health problems for residents living near a wind turbine or wind farm. Accurate wind turbine noise prediction methods are needed to minimize the amount of noise pollution by carefully considering the placement of wind turbines in the environment. However, wind turbine noise prediction is a complex task. This is mainly because of the noise propagation through the atmosphere and terrain, which is a time-dependent process with multiple mechanisms that can influence noise levels. Although physically accurate numerical models exist, they often require unfeasibly large computational times. To overcome this problem, analytical models with lower computational time but also lower accuracy are often used. One of these models is the Harmonoise model. In this work, the Harmonoise model is evaluated for its use in predicting wind turbine noise propagation. The evaluation focuses on the influence of wind shear and temperature profiles in the atmospheric boundary layer on wind turbine noise propagation. The wind shear and temperature profiles influence the local sound speed, which leads to bending, i.e. refraction of the sound waves. Most analytical noise prediction models cannot accurately incorporate this effect.
Item Type:Essay (Master)
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
Link to this item:https://purl.utwente.nl/essays/94419
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