Multi-objective optimization design of small wind turbine blade

Abstract

The multi - objective optimization design of small wind turbine blade is studied. Based on the theory of blade element - momentum and cantilever beam, combined with genetic algorithm, the mathematical model of optimal design of blade structure was established by taking the chord length, twist Angle and thickness of blade sections as design variables, the shape and stress as constraints, the lightweight of blade and the maximization of wind energy capture as objective functions. Taking a 10kW wind turbine blade as an example, the relationship between the three shape parameters of the blade before and after optimization and the impeller quality and wind energy capture of the wind turbine was analyzed. The calculation and analysis show that the optimized blade can not only improve the utilization coefficient of wind energy, but also reduce the mass line density of the blade section and realize the lightweight.