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Measurements of velocity Field in the wake of an oscillating wind turbine blade

Published online by Cambridge University Press:  03 February 2016

M. R. Soltani  and
M. Mahmoudi
M. R. Soltani
Affiliation:
msoltani@sharif.edu
M. Mahmoudi
Affiliation:
Aerospace Engineering Department, Sharif university of technology, Tehran, Iran
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Abstract

A series of tests were carried out to study the unsteady wake behaviour behind an aerofoil which is a section of a wind-turbine blade. The model is oscillated in pitch about its quarter chord axis at various reduced frequencies, amplitudes, and mean angles-of-attack. Instantaneous and mean velocity profiles were obtained using total and static pressure at 35 vertically aligned points behind the aerofoil via two similar rakes. The rakes were located at a distance of 1·5 chord length behind the model. An estimation of the real time and average variations of the linear momentum deficit during the oscillation cycle is obtained and has been compared with the corresponding static data. The results show that oscillation amplitude and reduced frequency have pronounced effects on the wake characteristics.

Type
Research Article
Information
The Aeronautical Journal , Volume 114 , Issue 1158 , August 2010 , pp. 493 - 504
Copyright
Copyright © Royal Aeronautical Society 2010 

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