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TECHNICAL PAPERS

Drag Prediction for Blades at High Angle of Attack Using CFD

[+] Author and Article Information
N. N. Sørensen

Wind Energy Department, Risø National Laboratory, DK-4000 Roskilde, Denmark

J. A. Michelsen

Wind Energy Department, Risø National Laboratory, DK-4000 Roskilde, Denmark;Department of Mechanical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark

J. Sol. Energy Eng 126(4), 1011-1016 (Nov 18, 2004) (6 pages) doi:10.1115/1.1807854 History: Received March 03, 2004; Revised May 24, 2004; Online November 18, 2004
Copyright © 2004 by ASME
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References

Figures

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The coarse O-mesh M1 used for the 2D-plate computations, the lower part of the figure shows a detail of the mesh near the plate
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Example of the mesh used for the flat plate 3D computations, the radius of the outer dome is approximately 25 times the width of the plate
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Mesh detail near the “tip” of the plate showing the square block used to resolve the tip region. The thickness of the plate in the plot has been scaled and only every third grid line are shown to remove cluttering of the grid lines
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The spanwise drag distribution of the three flat plates, only one half of the plate span is shown
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Iso-contours of the absolute value of the vorticity behind the plate with aspect ratio 40
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The planform of the four blades
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The variation of the thickness to chord ratio along the blade span for the four blades
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The variation of the twist along the blade span for the four blades
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Example of the mesh used for the LM8.2 computations
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Comparison of computed drag for the plates and blades with measured values for plates and cylinders
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Computed drag variation along the blade span for the four blades
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Iso-contours of the absolute value of the vorticity behind the LM19.1 blade

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