Wind turbine blade aerofoil of horizontal axis wind turbine

Abstract

The invention discloses a wind turbine blade aerofoil of a horizontal axis wind turbine. The wind turbine blade aerofoil comprises a front edge, a tail edge, a suction surface and a pressure surface, and is characterized in that the suction surface and the pressure surface are divided into upper and lower parts along a wing chord; the upper and lower parts are formed by connecting circular curves of different radiuses in a tangential manner; the maximum relative thickness of the wind turbine blade aerofoil is 12.38% of the chord length, and is at 29.6% of the chord length; and the maximum relative bending is 5.24%, and is at 40.4% of the chord length. The wind turbine blade aerofoil has the advantages that the corresponding shape and structure of the wind turbine blade aerofoil are designed, particularly the relative thickness and the relative bending positions are designed, so that the wind turbine blade aerofoil acquires a high lift coefficient under the same Reynolds number and at different angles of attack; moreover, under the same resistance coefficient, the bigger the lift coefficient, the better the aerodynamic performance effect of the aerofoil, thus the high output efficiency effect is achieved.

Description

technical field [0001] The invention relates to the technical field of wind power generators, in particular to designing a wind rotor blade airfoil of a horizontal axis wind power generator. Background technique [0002] With the emergence of the energy crisis and people's requirements for environmental protection, many countries, institutions and people are paying more and more attention to new energy sources. A wind turbine is a conversion device that converts wind energy into electrical energy. It is currently the most mature commercial technology and the most widely used equipment. As one of the most important components of wind turbines, many people in the industry are working hard on the blades. In addition to a lot of work in the material selection, structural design, and process manufacturing of the blades, from From the perspective of fluid mechanics and aerodynamics, improving the efficiency of blades, studying the performance of different airfoils, and studying a...

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Problems solved by technology

[0004] The above studies on the airfoil of wind turbine rotor blades are basically based on the technical requirements of large-scale wind turbines. For small and medium-sized wind turbines, there are still problems such as the above-mentioned airfoil performance is greatly reduced, and the annual output power is lost.

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