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WER-33: Optimum aerodynamic design of a four hundred kilowatt wind turbine
Staples, David L.
Staples, David L.
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WER 33.pdf
Adobe PDF, 14.54 MB
Authors
Other Names
Location
Time Period
Advisors
Original Date
Digitization Date
Issue Date
1985-03
Type
Technical report
Genre
Keywords
Turbines,Aerodynamics,Aerofoils
Subjects (LCSH)
Citation
David L. Staples. Optimum aerodynamic design of a four hundred kilowatt wind turbine. Wind Energy Report no.33.Wichita State University. Center for Energy Studies, 1987, 83 p.
Abstract
A blade design study for a horizontal-axis wind
turbine has demonstrated the use of a single-point
optimization algorithm in concert with a general
performance prediction program. The subject of the study
is a 3-bladed machine with a radius of 45 feet and a
generator power limit of 400 kilowatts. Estimated annual
energy capture was the primary basis of comparison for
competing designs. Three types of blade geometry were
considered: those incorporating both optimum chords and
twists at all spanwise stations, those having optimum
chords for a constant, non-zero pitch angle, and those
having optimum chords for blades with zero pitch angle at
all stations.
It was found that the loss of optimal twist caused the
predicted energy harvest to decrease by about 14%, while
the best zero-pitch blade suffered a 38% loss of annual
energy in comparison to the optimally twisted blade.
Additionally, several geometric simplifications made
to the optimized blades for purposes of construction ease
and reduced cost were seen to have relatively little effect
on the estimated energy capture.
Finally, it was shown that the use of airfoil data
"synthesized" to produce constant chordwise force
coefficients following stall will cause erroneous results
when used with blade geometry having non-zero pitch angles.
Table of Contents
Description
In the public domain. Date for general release: March 1987
Publisher
Wichita State University. Center for Energy Studies
Journal
Book Title
Series
Wind Energy Report;
;no.33
;no.33