文档介绍：ARTICLE IN PRESS
Renewable Energy 31 (2006) 1673–1685
ate/renene
WTAB, puter program for predicting the
performance of horizontal axis wind turbines with
adaptive blades
Alireza MaheriÃ, Siamak Noroozi, Chris A. Toomer, John Vinney
Faculty of CEMS, Frenchay Campus, University of the West of England, Coldharbour Lane Bristol, BS16 1QY, UK
Received 4 May 2005; accepted 10 September 2005
Available online 21 November 2005
Abstract
An aero-structure code has been developed to predict the performance of a horizontal axis wind
turbine (HAWT) with adaptive blades. The code is bination of an aerodynamic code, an
adaptive mesh generator and a finite element code, all developed especially for this purpose. It has
been shown that for a high elastic coupling, a coupled aero-structure simulation approach is
necessary to have acceptable results while a single step simulation approach can only be used to
estimate the blade loading and wind turbine power.
r 2005 Elsevier Ltd. All rights reserved.
Keywords: Wind turbine; Adaptive blade; Elastic coupling; TRIC; BEMT
1. Introduction
Whenever a wind turbine blade twists, it directly affects the angle of attack, changing
blade loading and therefore turbine power. This makes blade twist or pitch angle a key
parameter in controlling wind turbine performance. Two methods are provided for the
pitch control: classic active pitch control and passive pitch control, both of which are used
in all types of rotor design.
A passive control approach reduces the size of the controlling system, its initial cost and
the cost of maintenance. Early passive control design concepts were still using mechanical
ÃCorresponding author. Tel.: +44 117 3282643; fax: +44 117 3283800.
E-mail address: Ali2.******@ (A. Maheri).
0960-1481/$ - see front matter r 2005 Elsevier Ltd. All rights reserved.
doi:.
ARTICLE IN PRESS
1674 A. Maheri et al. / Renewable Energy 31 (2006) 1673–1685
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