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Preliminary analysis of dynamic stall effects on a 91-meter wind turbine rotorAnalytical investigation of dynamic stall on HAWT (horizontal-axis wind turbines) rotor loads was conducted. Dynamic stall was modeled using the Gormont approach on the MOD-2 rotor, treating the blade as a rigid body teetering about a fixed axis. Blade flapwise bending moments at station 370 were determined with and without dynamic stall for spatial variations in local wind speed due to wind shear and yaw. The predicted mean flapwise bending moments were found to be in good agreement with test results. Results obtained with and without dynamic stall showed no significant difference for the mean flapwise bending moment. The cyclic bending moments calculated with and without dynamic stall effects were substantially the same. None of the calculated cyclic loads reached the level of the cyclic loads measured on the MOD-2 using the Boeing five-minute-average technique.
Document ID
19950021554
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Wilson, Robert E. (Oregon State Univ. Corvallis, OR, United States)
Date Acquired
September 6, 2013
Publication Date
May 1, 1995
Publication Information
Publication: DASCON Engineering, Collected Papers on Wind Turbine Technology
Subject Category
Aerodynamics
Accession Number
95N27975
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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