Numerical Implications of Solidity and Blade Number on Rotor Performance of Horizontal-Axis Wind Turbines

[+] Author and Article Information
Matthew M. Duquette, Kenneth D. Visser

Department of Mechanical and Aeronautical Engineering, Clarkson University, Potsdam, NY 13699

J. Sol. Energy Eng 125(4), 425-432 (Nov 26, 2003) (8 pages) doi:10.1115/1.1629751 History: Received February 17, 2003; Revised July 11, 2003; Online November 26, 2003
Copyright © 2003 by ASME
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CP–λ characteristics of wind turbine designs 1
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Blade element force diagram and definitions
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Numerical comparison with experimental CWD 2740 rotor data from 6
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Numerical comparison with experimental CER rotor data from 15
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Airfoil lift and drag characteristics (a) SG6043 polar 16, (b) SG6043 lift curve 16, (c) Post stall behavior 7
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Optimum Design maximum CP versus tip-speed ratio for various blade numbers (BEM analysis)
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Maximum CP versus solidity for constant chord, untwisted blades. (BEM and BEMFW, β=0–20 deg)
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Effect of solidity on λ at maximum CP. Constant chord, untwisted blades. (BEM and BEMFW, β=0–20 deg)
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CP versus λ for (a) σ=0.05,B=3, and (b) σ=0.05,B=12. Constant chord, nontwisted blades, β=2 deg
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CP versus λ for (a) σ=0.15,B=3, and (b) σ=0.15,B=12. Constant chord, nontwisted blades, β=9 deg
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CP versus λ for (a) σ=0.25,B=3, and (b) σ=0.25,B=12. Constant chord, nontwisted blades, β=12 deg
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Schematic of rotor geometry for σ=0.05, 0.25 and B=3, 12
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Comparison of torque coefficient, CQ between methods and design points




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