Predicating method for wind turbine blade airfoil fluttering
A technology of blade airfoil and prediction method, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., to achieve the effect of avoiding blade flutter, avoiding hazards and consequences
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[0033] The process of predicting the flutter interval of the blade airfoil is mainly divided into two parts: first, the flutter interval is predicted by the eigenvalue method, and then the flutter interval obtained by the eigenvalue method is directly used as the tip speed of the time domain analysis method. The ratio range is used to guide the time-domain analysis method to analyze the flutter in detail and judge the intensity of the flutter. The eigenvalue method of wind turbine blade flutter is combined with the time-domain analysis method, so as to realize the discrimination of the flutter area and flutter degree of the blade. Specific steps are as follows:
[0034] First, the eigenvalue method is used to preliminarily predict the flutter interval:
[0035] 1) Select the airfoil and determine the structural parameters of the blade;
[0036] 2) Establish the aeroelastic equation of the two-dimensional blade airfoil;
[0037] 3) Find the aerodynamic force and aerodynamic ...
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