| Wind energy is a reusable clean energy. With the worldwide potential energy crisis and the increasing environment pollution, more and more countries attach importance to the wind energy development and research. Wind power industry in China started relatively late, developed since 1980s, but the development speed is fast. Compared with foreign advanced technology, China wind power generation technology level is low. There is a long way to go, More research invest is needed.The power characteristic of the wind turbine is an important research content of the wind power generation technology. The impeller, s power characteristic directly affects the size and stability of the wind turbine output power. So the impeller power characteristic is the foundation of the wind turbine power characteristic. At the same time, the blades are easily destroyed, so the static and vibration characteristics analysis of the blade and impeller is important. This paper mainly research on the key technology of the wind turbine. The main research contents are as follows:(1) The study makes aerodynamic analysis of the impeller using the theory of aerodynamic on the basis of a large number of related literatures, sets up the mathematical model of the wind turbine impeller.(2) On the base the above aerodynamic analysis and mathematical model, the author establishes the simulation model to search the power characteristic and the torque characteristic of the impeller, analyze how the wind velocity, the tip speed ratio and the propeller pitch angle will influence the power characteristic of the wind turbine.(3) The static characteristic of wind turbine blade and impeller will directly influence the strength, stiffness and fatigue life of the blade and impeller. The author establishes the structure model of the wind turbine blade and impeller makes static analysis static strength characteristics.(4) The blade is a slender structure, under complex loads and the blade has good flexibility, so the vibration cannot be avoided. In order to avoid vibration, especially the resonance, the paper studies the vibration characteristics of wind turbine impeller. Modal analysis of blade and impeller; research the vibration characteristics of wind turbine blade and impeller. |
