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TECHNICAL PAPERS

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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References

Johnson, G. L., 1985, Wind Energy Systems, Prentice-Hall, Englewood Cliffs, New Jersey.
Kentfield, J., 1996, The Fundamentals of Wind-Driven Water Pumpers, Gordon and Breach, Amsterdam.
Sagrillo,  M., 1998, “Apples and Oranges,” Home Power, 65, pp. 18–32.
Glauert, H., 1935, “Airplane Propellers,” W. F. Durand, ed., Aerodynamic Theory Volume IV, Division L, pp. 169–360, Dover Publications Inc., New York, 1963.
Tangler, J. L., 2000, “The Evolution of Rotor and Blade Design,” NREL/CP-500-28410, National Renewable Energy Laboratory, Golden, CO.
Rijs,  R., and Smulders,  P., 1990, “Blade Element Theory for Performance Analysis of Slow Running Wind Turbines,” Wind Eng., 14(2), pp. 62–79.
Viterna, L. A., and Corrigan, R. D., 1981, “Fixed Pitch Rotor Performance of Large Horizontal Axis Wind Turbines,” NASA Lewis Research Center, NASA Conf. Pub. 2230/DOE pub. CONF 810732.
Jones,  C., 1983, “Blade Element Performance in Horizontal-Axis Wind Turbine Rotors,” Wind Eng., 7(3), pp. 129–137.
Hansen, Martin O. L., 2000, Aerodynamics of Wind Turbines, James & James, London, pp. 22–59.
Hernandez,  J., and Crespo,  A., 1987, “Aerodynamics Calculation of the Performance of Horizontal Axis Wind Turbines and Comparison with Experimental Results,” Wind Eng., 11(4), pp. 177–187.
Mueller, T. J., 1985, “Low Reynolds Number Vehicles,” AGARDograph No. 288.
Duquette, M., 2002, “The Effect of Solidity and Blade Number on the Aerodynamic Performance of Small Horizontal Axis Wind Turbines,” Masters Thesis, Clarkson University, Potsdam, NY.
Kotb,  M. A., and Abdel Haq,  M. M., 1992, “A Rigid Wake Model for a Horizontal Axis Wind Turbine,” Wind Eng., 15(2), pp. 95–108.
Gould,  J., and Fiddes,  S. P., 1992, “Computational Methods for the Performance Prediction of HAWTs,” J. Wind Eng Ind. Aerodyn, 39, pp. 61–72.
Tangler, J. L., 2002, “The Nebulous Art of Using Wind-Tunnel Airfoil Data for Predicting Rotor Performance,” 40th Aerospace Sciences Meeting, Reno, NV, AIAA 2002-0040.
Selig, M. S., 1999, “PROPID and WTPREP, Aerodynamic Design Software for Horizontal Axis Wind Turbines,” Department of Aeronautical and Astronautical Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois.
Giguere, P. and Selig, M. S., 1997, “New Airfoils for Small Horizontal Axis Wind Turbines,” Windpower ’97, Austin TX, pp. 241–250, CONF-970608-PROC.

Figures

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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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