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Research Article

Influencing Factors Analysis for the Flutter of Wind Turbine Blades

Hao Wang, Jiaojiao Ding and Bing Ma
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Considering the non-stationary Theodorsen aerodynamic force, which was often used for the prediction of the classical flutter of the fixed wing aircraft, the flutter analysis of wind turbine blade airfoil was carried out through the use of the V-g method, based on the equation of motion of wind turbine blade airfoil. So the problem of the flutter critical velocity of blade airfoil should be solved using the eigenproblem and the V-g curve and V-ωcurve will be given. Then, the influencing factors of the flutter critical speed for the wind turbine blade airfoil, that is, the chordwise location of the center of mass, the ratio of flapwise natural frequency to the torsion natural frequency, the ration of mass and the location of three centers (aerodynamic center, stiffness center and the center of mass), were researched in great details. As the conclusions, the guidelines for the blade design, which can improve the flutter critical speed, can be obtained as: (1) Move forward the center of mass, (2) Keep the ratio of natural frequency square not equaling and far away from 1, (3) Choose the area of lower density of air as wind farm and (4) Reduce the distance between the aerodynamic center, stiffness center and the center of mass. These guidelines can be applied for the anti-flutter designs of the wind turbine blade.

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  How to cite this article:

Hao Wang, Jiaojiao Ding and Bing Ma, 2013. Influencing Factors Analysis for the Flutter of Wind Turbine Blades. Journal of Applied Sciences, 13: 2161-2166.

DOI: 10.3923/jas.2013.2161.2166


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