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Free yaw performance of the Mod-0 large horizontal axis 100 kW wind turbineThe NASA Mod-0 Large Horizontal Axis 100 kW Wind Turbine was operated in free yaw with an unconed teetered, downwind rotor mounted on a nacelle having 8-1/2 deg tilt. Two series of tests were run, the first series with 19 meter twisted aluminum blades and the second series with 19 meter untwisted steel spar blades with tip control. Rotor speed were nominally 20, 26 and 31 rpm. It was found the nacelle stabilized in free yaw at a yaw angle of between -55 deg to -45 deg was relatively independent of wind speed and was well damped to short term variations in wind direction. Power output of the wind turbine in free yaw, aligned at a large yaw angle, was considerably less than that if the wind turbine were aligned with the wind. For the Mod-0 wind turbine at 26 rpm, the MOSTAB computer code calculations of the free yaw alignment angle and power output compare reasonably well with experimental data. MOSTAB calculations indicate that elimination of tilt and adding coning will improve wind turbine alignment with the wind and that wind shear has a slight detrimental effect on the free yaw alignment angle.
Document ID
19830010964
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Corrigan, R. D.
(NASA Lewis Research Center Cleveland, OH, United States)
Viterna, L. A.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1982
Publication Information
Publication: Large Horizontal-Axis Wind Turbines
Subject Category
Energy Production And Conversion
Accession Number
83N19235
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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