Research on aeroelasticity of horizontal axis wind turbines by a fluid-structure coupling numerical method

Using sliding-mesh to deal with relative mesh movement and guarantee the continuity of physical variables, a coupling model of wind rotor and its surrounding air is established applying shear stress transport (SST) model to the Reynolds equation in fluid zone and the Newmark method to solve the oscillation equations in solid zone in this paper. The effects of fluid-structure interaction are considered by means of kinematic and dynamic conditions applied to the fluid-structure interfaces. According to a typical wind rotor, the three-dimensional numerical model including surrounding airs has been established. Then, flutters of wind rotor blade and surrounding flow field distribution have been analyzed based on the fluid-structure coupling model. The results show that it is feasible to analyze the wind turbine flutters based on the model which couples NS solvers to structural codes to perform full elastic computations of wind turbine rotors.