Wind turbine blade optimization design method considering aerodynamic efficiency and aerodynamic load

Abstract

The invention provides a wind turbine blade optimization design method considering aerodynamic efficiency and aerodynamic load, which can perform more comprehensive optimization design on a blade of a wind turbine so as to reduce the load borne by the blade while ensuring that the blade has higher aerodynamic performance. The method comprises the steps: step 1, determining a design working condition of the blade and geometric parameters of a plurality of blade sections of the blade, and respectively calculating aerodynamic performance of each blade section through aerodynamic analysis under the design working condition; s2, dividing the blade into a plurality of blade elements, calculating the stress condition and the output power of the blade based on a momentum-blade element theory and aerodynamic performance, and further constructing a target function by taking the maximum blade root bending moment and the maximum output power of the blade as optimization targets; and S3, solving the target function by adopting a multi-island genetic algorithm so as to obtain an optimized airfoil profile and an optimized mounting angle of each blade section.

Description

technical field [0001] The invention belongs to the field of wind turbine blades, in particular to a wind turbine blade optimization design method considering aerodynamic performance and aerodynamic load. Background technique [0002] Wind energy utilization is developing rapidly in my country, and high strength and high performance have become the design requirements of new wind turbines. The blade is one of the most important components in a wind turbine, and its aerodynamic shape determines the efficiency of the wind turbine and the strength of the load on the blade. Therefore, making wind turbine blades with good aerodynamic performance and lower load is an important part of the design and optimization of wind turbine blades. [0003] The traditional blade optimization design starts from the airfoil optimization. The optimization goal is the maximum lift-drag ratio of the airfoil. After the optimized airfoil is obtained, it is stacked to form a blade. However, the airf...

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Problems solved by technology

At the same time, the method of airfoil optimization does not take into account the optimization of the blade installation angle

Therefore, this two-dimensional design is prone to local optimal solutions and has limitations

[0004]In addition, traditional blade optimization often ignores the influence of airfoil curve changes on the load intensity of the blade, resulting in an increase in wind turbine power generation and blade load , its structural strength deteriorates

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