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TECHNICAL PAPERS

Skewed Wake Induction Effects on Thrust Distribution on Small Wind Turbine Rotors

[+] Author and Article Information
Ken Chaney, Alfred J. Eggers, Patrick J. Moriarty, William E. Holley

RANN, Inc. 744 San Antonio Road, Suite 26, Palo Alto, CA 94303e-mail: ranninc@pacbell.net

J. Sol. Energy Eng 123(4), 290-295 (Jul 01, 2001) (6 pages) doi:10.1115/1.1410109 History: Received March 01, 2001; Revised July 01, 2001
Copyright © 2001 by ASME
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References

Figures

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Predicted induction normal to the fore-aft axis of the Windlite 8kW rotor (skew=0° and TSR=7)
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Predicted induction normal to the fore-aft axis of the Windlite 8kW rotor (skew=30° and TSR=7)
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Predicted angles of attack along the fore-aft axis of the Windlite 8kW rotor (skew=0° and TSR=7)
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Predicted angles of attack along the fore-aft axis of the Windlite 8kW rotor (skew=30° and TSR=7)
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Representation of skewed helical vortices by circular and linear vortices in the wake
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Coordinate system and symbols for an idealized rotor disk and cylindrical wake
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Predicted induction normal to the fore-aft axis of an idealized rotor disk according to the Coleman model (skew=0° with and without inboard stall)
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Predicted induction normal to the fore-aft axis of an idealized rotor disk according to the Coleman model (skew=30° with and without inboard stall)
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Local thrust coefficient distribution for an idealized rotor disk according to the Coleman model (rstall=0.3,skew=60°,au=0.2, and as=0)
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Predicted center of thrust location for an idealized rotor disk over a range of skew angles (rstall=0.3,au=0.2, and as=0)
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Predicted center of thrust location for an idealized rotor disk over a range of skew angles (rstall=0.6,au=0.2, and as=0)
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Predicted cyclic blade root moments for an idealized rotor disk over a range of azimuth angles (skew=60°,au=0.2, and rstall=0.0)
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Predicted cyclic blade root moments for an idealized rotor disk over a range of azimuth angles (skew=60°,au=0.2,as=0, and rstall=0.3)
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Predicted cyclic blade root moments for an idealized rotor disk over a range of azimuth angles (skew=60°,au=0.2,as=0, and rstall=0.6)

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