Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/40619

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Title
Gyroscopic moments on small wind turbine blades at high yaw rates
Author/Creator
Wilson, S. V. R.;  Clausen, P. D.;  Wood, D. H.
Institution
The University of Newcastle. Faculty of Engineering & Built Environment, School of Engineering
Description
This paper describes measurements of the root bending moment on a three-bladed 500 W horizontal-axis wind turbine, which were obtained using a purpose-built rotating data acquisition system. The main aim was to investigate the moment when the turbine was yawing in response to wind direction changes, particularly when the yaw rate was large. This situation usually causes the largest loads on operating small turbines. At sufficiently high yaw rates, the moment receives a significant contribution from the cyclic Coriolis acceleration of the rotating and yawing blades. It is shown that maximum of the Coriolis moment provides an accurate bound to the measured cyclic moment and that the remaining 'average' moment is largely due to the thrust on the blade. However, further investigation is necessary to quantify the contributions to the average moment. Some of the consequences of the dominance of the Coriolis term for the assessment of blade safety are discussed.
Relation
Australian Journal of Mechanical Engineering Vol. 5, Issue 1, p. 1-8
Relation
http://www.engineersmedia.com.au/journals/ajme.html
Date
2008
Publisher
Engineers Australia
Keyword(s)
engineering;  yawing (aerodynamics);  wind turbines;  wind power;  turbines, blades
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/40619
Identifier
ISSN:1448-4846
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Subject
"Australian Journal of Mechanical Engineering"
 
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