Vertical axis wind turbine airfoil design method under condition of large attack angle range

Abstract

The invention discloses a vertical axis wind turbine airfoil design method under the condition of a large attack angle range. The method comprises the following steps: representing an airfoil profileby adopting a method of combining a class function and a B spline, and selecting an NACA0015 symmetric airfoil as an original airfoil; considering three groups of attack angle ranges, respectively establishing a wind turbine airfoil optimization mathematical model taking the maximum sum of tangential moment coefficients as an objective function, compiling a particle swarm optimization program, andcoupling RFOIL software to perform optimization design on the vertical axis wind turbine airfoil. According to the invention, the improvement of the tangential force of the airfoil profile under a large attack angle range is pursued, so that the aerodynamic performance of the whole HVAWT is improved. The novel HVAWT and the initial HVAWT aerodynamic performance are compared and analyzed, the airfoil profile more suitable for the HVAWT is obtained through optimization by optimizing three sets of different attack angle parameter ranges, the blade torque coefficient is integrally improved, and therefore the wind energy utilization rate of the HVAWT can be effectively increased.

Description

technical field [0001] The invention belongs to the technical field of wind power machines, and in particular relates to a design method for airfoils of vertical axis wind power machines under the condition of a large angle of attack range. Background technique [0002] As a non-polluting, abundant and renewable clean energy, wind energy has attracted more and more people's attention and favor. Therefore, increasing the capacity output of wind turbines has always been the focus of research scholars in various countries. In recent years, because the H-type vertical axis wind turbine (H-VAWT) has the advantages of simple structure, easy installation and maintenance, high adaptability, no need for yaw device, simple blade manufacturing, etc., the research of H-VAWT has become a hot topic in the field of wind power generation. Research hotspots. H-VAWT mainly relies on the blades to capture wind energy, and the shape and structure of the blades directly affect the output of th...

AI Technical Summary

Problems solved by technology

However, the vertical axis wind turbine has a large range of attack angles, and the flow field distribution and turbulence are more complex, so that the airfoil designed under the single angle of attack cannot maximize the utilization rate of wind energy.

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