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WER-34: A comparison of wind turbine performance programs based upon blade-element/momentum and helical vortex theories
Staples, David L.
Staples, David L.
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WER 34.pdf
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Issue Date
1984-12
Type
Technical report
Genre
Keywords
Turbines,Aerodynamics,Aerofoils
Subjects (LCSH)
Citation
David L. Staples. A comparison of wind turbine performance programs based upon blade-element/momentum and helical vortex theories. Wind Energy Report no.34.Wichita State University. Center for Energy Studies, 1984, 71 p.
Abstract
A comparison has been made between two programs
intended for the performance analysis of a horizontal-axis
wind turbine. One program, WIND14, is based on the blade element
/ momentum theory of propellers, while the other,
VORTEX, uses helical vortex theory. The programs differ
also in terms of input/output versatility, airfoil
aerodynamic modeling, and in the amount of execution time
and number of calculations required for a given result.
Two basic types of comparison are offered: In the
first case, the programs employ identical basic airfoil
data, so as to isolate, to as great an extent as possible,
the differences arising directly from the applications of
the two theories. In the second case, each program was
allowed its greatest versatility in attempting to predict
the electrical output of the Boeing Mod-2 Wind Turbine
System, for which extensive empirical data is available.
The results indicate that, in general, the vortex code
will pred ict lower cut-in windspeeds and lower peak power
than will WIND14, given identical airfoil data, while the
system power predictions of both programs fall within the
scatter of the available Mod-2 empirical data for the range
of windspeeds between cut-in and rated power. To produce a
given result, VORTEX requires approximately 15 times as
much CPU time as does WIND14, although storage requirements
are approximately the same.
Table of Contents
Description
In the public domain. Date for general release: December 1986
Publisher
Wichita State University. Center for Energy Studies
Journal
Book Title
Series
Wind Energy Report;
;no.34
;no.34