Combined analytical/FEA-based coupled aero structure simulation of a wind turbine with bend-twist adaptive blades

Alireza Maheri*, Siamak Noroozi, John Vinney

*Corresponding author for this work

Research output: Contribution to journalArticle

35 Citations (Scopus)

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 a combined 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 the computational time significantly and makes the aerodynamic design/optimisation of bend-twist adaptive blades practical. Comparison of the results of a case study which applies both combined analytical/FEA-based and FEA-based CAS simulation shows that when using the combined method the required computational 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%. (c) 2006 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)916-930
Number of pages15
JournalRenewable Energy
Volume32
Issue number6
Early online date12 Jun 2006
DOIs
Publication statusPublished - May 2007

Keywords

  • wind turbine
  • adaptive blade
  • elastic coupling
  • coupled-aero-structure simulation
  • thin-walled-beams
  • composite rotor blades
  • elastic couplings
  • cross-sections
  • behavior
  • model

Cite this

Combined analytical/FEA-based coupled aero structure simulation of a wind turbine with bend-twist adaptive blades. / Maheri, Alireza; Noroozi, Siamak; Vinney, John.

In: Renewable Energy, Vol. 32, No. 6, 05.2007, p. 916-930.

Research output: Contribution to journalArticle

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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 a combined 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 the computational time significantly and makes the aerodynamic design/optimisation of bend-twist adaptive blades practical. Comparison of the results of a case study which applies both combined analytical/FEA-based and FEA-based CAS simulation shows that when using the combined method the required computational 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{\%}. (c) 2006 Elsevier Ltd. All rights reserved.",
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AB - 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 a combined 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 the computational time significantly and makes the aerodynamic design/optimisation of bend-twist adaptive blades practical. Comparison of the results of a case study which applies both combined analytical/FEA-based and FEA-based CAS simulation shows that when using the combined method the required computational 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%. (c) 2006 Elsevier Ltd. All rights reserved.

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