Laser measurements of flow over a forest

It is estimated that 20–30% of the total European wind energy growth takes place in areas where the wind flow is affected by forests. The description of the wind conditions near and above forests poses a challenge, since assumptions of classical boundary-layer theory are violated. Turbines are desig...

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Published in:Journal of physics. Conference series 2007-07, Vol.75 (1), p.012057
Main Authors: Mann, Jakob, Dellwik, Ebba, Bingöl, Ferhat, Rathmann, Ole
Format: Article
Language:English
Subjects:
Beech
Forests
Phase Doppler Anemometer
Physics
Turbulence intensity
Wind power
Wind profiles
Wind turbines
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description It is estimated that 20–30% of the total European wind energy growth takes place in areas where the wind flow is affected by forests. The description of the wind conditions near and above forests poses a challenge, since assumptions of classical boundary-layer theory are violated. Turbines are designed for a maximal turbulence intensity and wind profile gradient. In forested areas, these limits are often violated possibly leading to reduced turbine life-time. In this paper we investigate the mean wind profile and turbulence statistics above an 85 years old dense beech forest by use of a laser Doppler anemometer and compare the profiles with a CFD model specifically made for the modeling of flow over vegetation canopies.
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subjects Beech
Forests
Phase Doppler Anemometer
Physics
Turbulence intensity
Wind power
Wind profiles
Wind turbines
title Laser measurements of flow over a forest
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