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Theoretical and experimental power from large horizontal-axis wind turbinesA method for calculating the output power from large horizontal-axis wind turbines is presented. Modifications to the airfoil characteristics and the momentum portion of classical blade element-momentum theory are given that improve correlation with measured data. Improvement is particularly evident at low tip-speed ratios where aerodynamic stall can occur as the blade experiences high angles of attack. Output power calculated using the modified theory is compared with measured data for several large wind turbines. These wind turbines range in size from the DOE/NASA 100 kW Mod-0 (38 m rotor diameter) to the 2000 kW Mod-1 (61 m rotor diameter). The calculated results are in good agreement with measured data from these machines.
Document ID
19820025954
Document Type
Conference Paper
Authors
Viterna, L. A. (NASA Lewis Research Center Cleveland, OH, United States)
Janetzke, D. C. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 4, 2013
Publication Date
September 1, 1982
Subject Category
ENERGY PRODUCTION AND CONVERSION
Report/Patent Number
DOE/NASA/20320-41
NASA-TM-82944
E-1346
NAS 1.15:82944
Funding Number(s)
PROJECT: RTOP 776-33-41
CONTRACT_GRANT: DE-AI01-76ET-20320
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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