Results of free yaw tests of the Mod-0 100-kilowatt wind turbine
Tests were conducted on the Mod-0 100 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/sup 0/ 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/sup 0/ 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 top 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.
- Research Organization:
- NASA Lewis Research Center, Cleveland, OH (United States)
- DOE Contract Number:
- AI01-76ET20320
- OSTI ID:
- 5936891
- Report Number(s):
- DOE/NASA/20320-46; NASA-TM-83432; CONF-830631-10; ON: DE83014795
- Resource Relation:
- Conference: 6. biennial wind energy conference, Minneapolis, MN, USA, 1 Jun 1983
- Country of Publication:
- United States
- Language:
- English
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