文档介绍：ARTICLE IN PRESS
Renewable Energy 32 (2007) 916–930
ate/renene
Combined analytical/FEA-based coupled aero
structure simulation of a wind turbine with
bend–twist adaptive blades
Alireza MaheriÃ, Siamak Noroozi, John Vinney
Faculty of CEMS, University of the West of England-Bristol, Coldharbour Lane, Bristol, BS16 1QY, UK
Received 5 January 2006; accepted 10 April 2006
Available online 12 June 2006
Abstract
The simulation of wind turbines with bend–twist adaptive blades is a coupled aero-structure (CAS)
procedure. The blade twist due to elastic coupling is a required parameter for wind turbine
performance evaluation and can be predicted through a finite element (FE) structural analyser. FEA-
based codes are far too slow to be useful in the aerodynamic design/optimisation of a blade. This
paper presents bined analytical/FEA-based method for CAS simulation of wind turbines
utilising bend–twist adaptive blades. This method of simulation employs the induced twist
distribution and the flap bending at the hub of the blade predicted through a FEA-based CAS
simulation at a reference wind turbine run condition to determine the wind turbine performance at
other wind turbine run conditions. This reduces putational time significantly and makes the
aerodynamic design/optimisation of bend–twist adaptive blades practical. Comparison of the results
of a case study which applies bined analytical/FEA-based and FEA-based CAS simulation
shows that when using bined method the putational time for generating a power
curve reduces to less than 5%, while the relative difference between the predicted powers by two
methods is only about 1%.
r 2006 Elsevier Ltd. All rights reserved.
Keywords: Wind turbine; Adaptive blade; Elastic coupling; Coupled-aero-structure simulation
ÃCorresponding author. Tel.: +44 0117 3282643; fax: +44 0117 3283800.
E-mail address: Ali2.******@ (A. Maheri).
0960-1481/$ - see front matter r 2006 Elsevier Ltd. All rights rese