The influence of free stream turbulence intensity on the unsteady behavior of a wind turbine blade section

Seddighi, M ; Sharif University of Technology | 2007

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  1. Type of Document: Article
  2. DOI: 10.2514/6.2007-630
  3. Publisher: American Institute of Aeronautics and Astronautics Inc , 2007
  4. Abstract:
  5. Extensive wind tunnel tests have been conducted to investigate effects of turbulence intensity variations on the behavior of a section of a wind turbine blade in an oscillatory motion. Special emphasize was applied on the aerodynamic characteristics when oscillating the model in the vicinity of its static stall angle of attack and in the post stall condition. The model had 0.25m chord and was pitched about its quarter-chord. Data were acquired at various Reynolds number, and reduced frequency. Results show that turbulent intensity has strong effect on the unsteady load coefficients, hence aerodynamic performance of this model. Furthermore, free stream turbulence has different effect on the aerodynamic loads when the maximum angle of attack is near the static stall angle or beyond it (Post stall condition)
  6. Keywords:
  7. Angle of attack ; Flight dynamics ; Turbomachine blades ; Turbulence ; Wind tunnels ; Aerodynamic performance ; Load coefficients ; Wind tunnel tests ; Wind turbine blades ; Wind turbines
  8. Source: 45th AIAA Aerospace Sciences Meeting 2007, Reno, NV, 8 January 2007 through 11 January 2007 ; Volume 11 , 2007 , Pages 7611-7618 ; 1563478900 (ISBN); 9781563478901 (ISBN)
  9. URL: https://arc.aiaa.org/doi/10.2514/6.2007-630