Wind and Structures

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Analysis of the effect of blade positions on the aerodynamic performances of wind turbine tower-blade system in halt states

  • Ke, Shitang (Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics) ;
  • Yu, Wei (Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics) ;
  • Wang, Tongguang (Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics) ;
  • Ge, Yaojun (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University) ;
  • Tamura, Yukio (Wind Engineering Research Center, Tokyo Polytechnic University)
  • Received : 2016.04.23
  • Accepted : 2017.01.13
  • Published : 2017.03.25
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Abstract

The unsteady flow field disturbance between the blades and tower is one of the primary factors affecting the aerodynamic performance of wind turbine. Based on the research object of a 3MW horizontal axis wind turbine which was developed independently by Nanjing University of Aeronautics and Astronautics, numerical simulation on the aerodynamic performance of wind turbine system in halt state with blades in different position was conducted using large eddy simulation (LES) method. Based on the 3D unsteady numerical simulation results in a total of eight conditions (determined by the relative position with the tower during the complete rotation process of the blade), the characteristics of wind pressure distributions of the wind turbine system and action mechanism of surrounding flow field were analysed. The effect of different position of blades on the aerodynamic performance of wind turbine in halt state as well as the disturbance effect was evaluated. Results of the study showed that the halt position of blades had significant effect on the wind pressure distribution of the wind turbine system as well as the characteristics of flow around. Relevant conclusions from this study provided reference for the wind-resistant design of large scale wind turbine system in different halt states.

Keywords

Acknowledgement

Supported by : China Postdoctoral Science Foundation

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