Airfoil profile for wind turbine blade layer of wind generating set

Abstract

The embodiment of the invention discloses an airfoil profile for a wind turbine blade layer of a wind generating set, and relates to the technical field of aerodynamic force. The lift coefficient canbe improved, and a larger stall angle of attack and smaller resistance can be realized, so that the wind energy absorption efficiency of the wind turbine of the wind generating set is improved. The airfoil profile comprises an S1 section, an S2 section, an S3 section, an S4 section and an S5 section; the S1 section and the S5 section are trailing edge contraction sections of the airfoil profile, and the S1 section and the S5 section are in closed connection at the trailing edge position of the airfoil profile; the S2 section is a smooth transition section of the upper surface of the airfoil profile and is in closed connection with the S1 section and the S3 section, and the camber of the mean camber line of the airfoil profile is designed to be larger in cooperation with the S5 section of the lower surface; the section S3 is a leading edge section of the upper surface of the airfoil profile and is connected with the section S2 and the section S4; and the S4 section is connected with thefront edge section of the lower surface of the airfoil profile, the S3 section and the S5 section, and the camber is larger than that of the S809 airfoil profile. The airfoil profile is suitable fordesign of the wind turbine blades of the wind generating sets.

Description

technical field [0001] The invention relates to the technical field of aerodynamics, in particular to an airfoil which is mainly applied in the field of wind power generation and can improve the blade layer of a wind rotor of a wind power generating set. Background technique [0002] For the geometric shape of a wind blade, the airfoil is the "gene" of the blade, and its aerodynamic performance directly affects the aerodynamic performance of the wind turbine blade. Therefore, the design of the aerodynamic shape of the wind turbine rotor blade is inseparable from the airfoil design. Before the 1980s, the airfoils of wind turbines often used aviation airfoils. However, if figure 1 As shown, the aeronautical airfoil is usually designed under pressure-sonic conditions, and the aerodynamic performance cannot be effectively guaranteed under low-speed conditions. In addition, there are disadvantages that the thickness is small and cannot meet the structural requirements. The stal...

AI Technical Summary

Problems solved by technology

However, the current special airfoils for wind turbines also have the problem of air separation at high angles of attack, so the resistance of the airfoils is relatively large, which reduces the economic benefits of wind turbine rotors

Images