Research of dynamic inflow effect on flexible turbine rotor.

The dynamic inflow model in yaw condition was constructed based on the theory of BEM revised model and Pitt-Peter model; besides first-order differential equation of dynamic inflow model was also figured out by using fourth-order Runge-Kutta method. When taking large deformation of flexible blade during the working proceed and the feedback of flexible structural deformation on dynamic inflow model into consideration, the gradient mechanisms of induce factor on wind turbine were obtained in different circumstances, such as in the wind shear, wind turbulence, yaw, transition of rotor speed and blade pitch angel. Dynamic induce factor of one 5MW wind turbine was figured out, dynamic description of induce factor was founded, what's more dynamic inflow model and analytical method suitable for flexible blade were established, all these calculate were achieved by employing MATLAB programming. The validity and practicality of dynamic inflow model with flexible structural feedback were confirmed by comparing the calculate results of different models. [ABSTRACT FROM AUTHOR]