Automatic measurement and characterization of the dynamic properties of tethered membrane wings
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Published:2019-01-24
Issue:1
Volume:4
Page:41-55
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ISSN:2366-7451
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Container-title:Wind Energy Science
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language:en
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Short-container-title:Wind Energ. Sci.
Author:
Hummel JanORCID, Göhlich Dietmar, Schmehl RolandORCID
Abstract
Abstract. We have developed a tow test setup for the reproducible measurement of the
dynamic properties of different types of tethered membrane wings. The test
procedure is based on repeatable automated maneuvers with the entire kite
system under realistic conditions. By measuring line forces and line angles,
we determine the aerodynamic coefficients and lift-to-drag ratio as functions
of the length ratio between power and steering lines. This nondimensional
parameter characterizes the angle of attack of the wing and is varied
automatically by the control unit on the towed test bench. During each towing
run, several test cycles are executed such that mean values can be determined
and errors can be minimized. We can conclude from this study that an
objective measurement of specific dynamic properties of highly flexible
membrane wings is feasible. The presented tow test method is suitable for
quantitatively assessing and comparing different wing designs. The method
represents an essential milestone for the development and characterization of
tethered membrane wings as well as for the validation and improvement of
simulation models. On the basis of this work, more complex maneuvers and a
full degree of automation can be implemented in subsequent work. It can also
be used for aerodynamic parameter identification.
Publisher
Copernicus GmbH
Subject
Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment
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