Lift Enhancement of the Airfoil and Tip Flow Control for Wind Turbine

BAI Ya-lei; MA Xing-yu; MING Xiao

doi:10.3879/j.issn.1000-0887.2011.07.002

Volume 32 Issue 7

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BAI Ya-lei, MA Xing-yu, MING Xiao. Lift Enhancement of the Airfoil and Tip Flow Control for Wind Turbine[J]. Applied Mathematics and Mechanics, 2011, 32(7): 774-784. doi: 10.3879/j.issn.1000-0887.2011.07.002

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Lift Enhancement of the Airfoil and Tip Flow Control for Wind Turbine

doi: 10.3879/j.issn.1000-0887.2011.07.002

Department of Aerodynamics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China

Received Date: 2011-02-21
Rev Recd Date: 2011-05-16
Publish Date: 2011-07-15

Abstract

Abstract

Two techniques that miprove the aerodynamic performance of wind turbine airfoils were described. The airfoil S809, often used forwind turbine design, and the airfoil FX60-100, having higher lift-dragratio, were selected to verify the flow control techniques. The flow deflector, fixed at the leadingedge, was employed to control the boundary layer separation on the a irfoil at high angle of attack. The multiisland genetic algorithm was used to optimize the parameters of the flow deflector. The results indicate that the flow deflector can suppress the flow separation, delay stall and enhance the lift. In the second part of this paper, the characteristics o f the blade tipvortex, wake vortex and the surface pressured istributions of blades are analyzed. The vortex diffuser, set up at the blade tip, was employed to control the blade tipvortex. The results show that the vortex diffuser can increase the total pressure coefficient of the core of the vortex, decrease the strength of blade tipvortex, lower the noise and improve the efficiency of the blade.
- flow control,
- flow separation,
- flow deflector,
- multi-is land genetic algorithm,
- blade tipvortex,
- vortex diffuser

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References(14)

References

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