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Title Sound propagation model for off-shore wind turbines
Author Nukala, Vasishta Bhargava (Department of Mechanical Engineering, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Supervisor Sørensen, Jens Nørkær (Fluid Mechanics, Department of Mechanical Engineering, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Shen, Wen Zhong (Fluid Mechanics, Department of Mechanical Engineering, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Institution Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark
Thesis level Master's thesis
Year 2006
Abstract Crank Nicolson Parabolic Equation method is used to calculate the low frequency, long range sound propagation over the sea atmospheric conditions. The model is primarily intended to investigate the noise from off-shore wind turbines assumed under homogeneous conditions. The study about water waves has been briefly dealt and its effects on atmospheric sound propagation are also reviewed. The surface roughness valid for oceanic atmosphere has been included in the sound propagation model though different surface roughness lengths are also tested. Downward refraction has been studied and in addition the turbulence effects are also included using the semi-empirical sound speed profile from Monin-Obhukov similarity theory. Furthermore other sound propagation models based on both numerical and analytical techniques are discussed. Low level jet sound speed profiles have been studied but not successfully incorporated in to the model due to computational difficulties.
Imprint Technical University of Denmark (DTU) : Kgs. Lyngby, Denmark
Pages 74
Fulltext
Original PDF Nukala_MSc_2006.pdf (3.40 MB)
Admin Creation date: 2011-05-23    Update date: 2011-05-23    Source: dtu    ID: 276876    Original MXD