Effects of selected atmospheric variables on the power output of a DOE Mod-2 wind turbine Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/2j62s8184

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  • The effects of selected atmospheric variables on the power output of a DOE Mod-2 horizontal-axis wind turbine are studied. Particular attention is focused on unsteady, nonuniform flow conditions within the rotor disc as represented by vertical profiles measured at adjacent meteorological towers. Primary variables are wind speed, wind direction and turbulence intensity. A classification on the basis of velocity profiles is found to be useful in conducting basic statistical analysis and in isolating performance anomalies. Power fluctuation is found to depend primarily on two variables, turbulence intensity and directional shear; the magnitudes of their effects being comparable for the data studied. Increasing turbulence intensity is associated with increased power while increasing directional shear is associated with decreased power. Under very turbulent conditions the power is adversely affected by relatively large yaw angles associated with high values of the lateral turbulence intensity component.
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