Aeroelastic Stability of Wind Turbine Blade Section Based on Beddoes-Leishman Model

In view of the computing complexity of aerodynamic coefficients and the complicacy of aeroelastic stability analysis for large wind turbine blade section of multiple DOF, the paper developed an approach of fitting aerodynamic coefficients to simplify aerodynamic forces computation, and to reduce order of nonlinear equation, so as to linearize and simplify aeroelastic stability analysis. The paper gave simplified aerodynamic model and simplified aerodynamic coefficients, and made stability analysis based on Beddoes-Leishman model. The analysis results are reaffirmed by another approach of system response. The fitting approach shows certain of reliability and can also be used for some other blade sections of NACA.