Reduction of horizontal wind speed in a boundary layer with obstacles
Research Notes
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Abstract
The reduction of horizontal wind speed at hub height in an infinite cluster of wind turbines is computed from a balance between a loss of horizontal momentum due to the drag and replenishment from above by turbulent fluxes. This reduction is derived without assumptions concerning the vertical wind profile above or below hub height, only some basic assumptions on turbulent exchange have been made. Two applications of the result are presented, one considering wind turbines and one pressure drag on orographic obstacles in the atmospheric boundary layer. Both applications are basically governed by the same kind of momentum balance.
Keywords
Boundary Layer Wind Speed Wind Turbine Basic Assumption Atmospheric Boundary Layer
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References
- Bossanyi, E. A., Maclean, C., Whittle, G. E., Dunn, P. D., Lipman, N. H. and Musgrove, P. J.: 1980, ‘The Efficiency of Wind Turbine Clusters’,Proceedings of the Third Intern. Symposium on Wind Energy Systems, Lyngby (DK), August 26–29, 1980, pp. 401–416.Google Scholar
- Emeis, S.: 1990, ‘Pressure Drag of Obstacles in the Atmospheric Boundary Layer’,J. Appl. Meteorol. 29, 461–476.Google Scholar
- Frandsen, S.: 1992, ‘On the Wind Speed Reduction in the Center of Large Clusters of Wind Turbines’,J. Wind Eng. Ind. Aerodyn. 39, 251–265.Google Scholar
- Jensen, N. O.: 1978, ‘Change of Surface Roughness and the Planetary Boundary Layer’,Quart. J. Roy. Meteorol. Soc. 104, 351–356.Google Scholar
- Jensen, N. O.: 1983, ‘A Note on Wind Generator Interaction’, Risø-M-2411, Risó National Lab., Roskilde, Denmark, 16 pp.Google Scholar
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© Kluwer Academic Publishers 1993