Optimum Design And Dynamics Characteristic Analysis On Wind Turbine Blades

Wind energy is a clean cyclic pollution-free energy. All countries exploit emphatically it , the point of the development makes use of the wind power machine to convert the wind energy into the electric power. In the process of conversion the wind energy lowers the speed of the current of air only, it does not result in any pollution for atmosphere. Applying wind electric power generation have the important meaning such as reducing the depletion of the conventional source of energy, the environmental protection and ecosystems balance, improving the energy structure. When the wind of constant speed blows the dormant blade, the blade rotates and drives the generator to generate electricity, availably changing wind energy into electric power. A wind-driven generator is an assembling unit that is made of wind machine driving electric generator——the blade accepts the wind energy, then it rotates and transmits the power to the electric generator ultimately, the electric generator is an equipment of changing the wind power into the electric power. The blade of wind power generator is an important part, absorbing the wind energy and converting machine energy. Mary factors affect directly the efficiency of a blade absorbing wind energy, such as the blade's aerofoil and extent warped, the blade's quantities, the velocity ratio of a blade tip's speed and wind speed. The blade's aerofoil that is importantly to wind machine affects the start-up of wind wheel and the efficiency absorbing wind energy directly. The blade's aerofoil is basically divided into flat type, wind-sail type and warped type. The low speed wind machine usually adopts the flat type or wind-sail type as the blade's aerofoil. On the whole angle of attack is constant, even the efficiency is also not high, but the structure is simple, manufactured easily , in addition the cost is very low. At the present day the wind wheel blade's aerofoil of the wind-driven Generator uses basically the warped type. Although making warped blade is difficult,this type of blades raise the efficiency of utilization, and the wind-driven generator acquire the best power. The paper mainly studies two aspects: The one aspect is optimum design. Give an example of NM600kW the horizontal axis wind turbine to research in the global optimum design: (1) Determine the optimum model. Firstly determining the function index is the...