A comparison of spanwise aerodynamic loads estimated from measured bending moments versus direct pressure measurements on horizontal axis wind turbine blades [electronic resource].

Published: Washington, D.C. : United States. Dept. of Energy, 1991.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description: Pages: (11 pages) : digital, PDF file
Additional Creators: United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information

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Summary

Two methods can be used to determine aerodynamic loads on a rotating wind turbine blade. The first is to make direct pressure measurements on the blade surface. This is a difficult process requiring costly pressure instrumentation. The second method uses measured flap bending moments in conjunction with analytical techniques to estimate airloads. This method, called ALEST, was originally developed for use on helicopter rotors and was modified for use on horizontal axis wind turbine blades. Estimating airloads using flap bending moments in much simpler and less costly because measurements can be made with conventional strain gages and equipment. This paper presents results of airload estimates obtained using both methods under a variety of operating conditions. Insights on the limitations and usefulness of the ALEST bending moment technique are also included. 10 refs., 6 figs.

Report Numbers

E 1.99:nrel/tp-257-4507
E 1.99: conf-9109112--3
conf-9109112--3
nrel/tp-257-4507

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Note

Published through SciTech Connect.
10/01/1991.
"nrel/tp-257-4507"
" conf-9109112--3"
"DE92001158"
21. American Wind Energy Association conference: windpower '91, Palm Springs, CA (United States), 24-27 Sep 1991.
Simms, D A; Butterfield, C P.
National Renewable Energy Lab., Golden, CO (United States)

Funding Information

AC02-83CH10093

View MARC record | catkey: 14359475