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Results of free yaw tests of the Mod-O 100 kilowatt wind turbineTests were conducted on the Mod-O 100 kW experimental wind turbine to provide data on yaw alignment characteristics of a large horizontal axis wind turbine with its yaw restraint removed (i.e., in free yaw). The wind turbine consisted of a downwind horizontal axis rotor mounted on a tubular tower. Three rotor configurations were tested. Each rotor was teetered, coned 3 deg and tip-controlled. Two of the rotors had pitch-flap coupling or Delta-3, and one rotor had none. The two rotors with Delta-3 differed in the airfoil used in the tip sections. Test results indicate the rotor without pitch-flap coupling did not align closer than 25 deg with the wind, and pitch-flap coupling improved the wind turbine's alignment with the wind. Yaw damping was shown to have a favorable effect on free yaw characteristics. The change in the tip airfoil section was shown to affect the free yaw alignment also. The rotors with Delta-3 were shown to be capable of responding to wind shifts and exhibited stable operating properties.
Document ID
19830021542
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Glasgow, J. C.
(NASA Lewis Research Center Cleveland, OH, United States)
Corrigan, R. D.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 4, 2013
Publication Date
January 1, 1983
Subject Category
Energy Production And Conversion
Report/Patent Number
NAS 1.15:83432
DOE/NASA/20320-46
E-1724
NASA-TM-83432
Meeting Information
Meeting: Biennial Wind Energy Conf. and Workshop
Location: Minneapolis
Start Date: June 1, 1983
End Date: June 3, 1983
Accession Number
83N29813
Funding Number(s)
CONTRACT_GRANT: DE-AI01-76ET-20320
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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