Journal of Northeastern University Natural Science ›› 2016, Vol. 37 ›› Issue (6): 851-855.DOI: 10.12068/j.issn.1005-3026.2016.06.019

• Mechanical Engineering • Previous Articles     Next Articles

Mechanism and Method of Pre-bending Design for the Wind Turbine Blades

GUO Xiao-feng1,2, CHEN Jin1, LI Song-lin1   

  1. 1. State Key Laboratory of Mechanic Transmission, Chongqing University, Chongqing 400044, China; 2. School of Mechanical Science & Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China.
  • Received:2014-11-11 Revised:2014-11-11 Online:2016-06-15 Published:2016-06-08
  • Contact: GUO Xiao-feng
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Abstract: A new static aeroelastic analysis method for the HAWT was proposed based on the modified blade element momentum (BEM) theory. The deformation curves of the blade under different steady wind speeds were analyzed. The prebending design principles and a profile design method were developed. The static aeroelastic analyzing result of the prebending and unprebending blade shows that, the aerodynamic performance is influenced by the cross section shape change, blade axial and torsional deformation. The prebending blade’s actual power has certain decrease because of the blade torsional deformation. This study provides theoretical basis and design method for the blade.

Key words: wind turbine, pre-bending blade, static aeroelastic, pre-bending mechanism, pre-bending profile design

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