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Article

Noise Propagation Issues in Wind Energy Applications

[+] Author and Article Information
John M. Prospathopoulos, Spyros G. Voutsinas

National Technical University of Athens, School of Mechanical Engineering 9, Heroon Polytechniou Str., 15773, Zografou, Athens, Greece

J. Sol. Energy Eng 127(2), 234-241 (Apr 25, 2005) (8 pages) doi:10.1115/1.1862257 History: Received June 02, 2004; Revised November 29, 2004; Online April 25, 2005
Copyright © 2005 by ASME
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References

Figures

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The source-receiver geometrical configuration for the axisymmetric sound propagation problem.
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Graphic representation of the ray velocity vector. Sum of the sound speed and the wind velocity.
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Ground plan of a wind park. Superposition of the contributions from the wind turbines to the receiver point.
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Tammhausen: Excess attenuation at a horizontal distance of 530 m for downwind propagation conditions. Effect of turbulence.
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Tammhausen: Excess attenuation at a horizontal distance of 530 m for downwind propagation conditions. Effect of refraction.
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Effect of flow resistivity on the excess attenuation. Horizontal distance from the wind turbine 250 m.
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Effect of thickness of the absorbent material on the excess attenuation. Horizontal distance from the wind turbine 250 m.
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Effect of temperature and relative humidity on the excess attenuation. Horizontal distance from the wind turbine 250 m.
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Effect of the turbulent index of refraction on the excess attenuation. Horizontal distance from the wind turbine 250 m.
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Effect of the wind direction on the excess attenuation. Horizontal distance from the wind turbine 250 m.
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Sound pressure level at various distances from the center of the wind park downwind.
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Sound pressure level at 450 m downwind. Effect of the wind direction.
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Downward and upward refraction of eigenrays for downwind and upwind propagation conditions, respectively.
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(a) Moderate downwind conditions (moderate gradient of wind velocity). No eigenray. (b) Strong downwind conditions (high gradient of wind velocity). Multiple eigenrays. (c) Upwind conditions. No eigenray.

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