High- aerodynamic performance wind turbine blade

Abstract

The invention discloses a high- aerodynamic performance wind turbine blade, and belongs to the technical field of wind power utilization. A three-dimensional structure on the surface of an airfoil part of the blade is formed by ten airfoil surface airfoil curves in a continuous and smooth transition mode; each airfoil surface airfoil curve is composed of a leeside curve and a windward side curve; an original point of a coordinate system is defined as a leading edge point of the first airfoil surface airfoil curve, the extending direction of the blade is defined as the positive direction of a Z axis, the direction of a wind rotor shaft is defined as the direction of a Y axis, and the direction which is perpendicular to both the Z axis and the Y axis is defined as the direction of an X axis; the ten airfoil surface airfoil curves are parallel to an X0Y plane respectively and are arranged in sequence in the positive direction of the Z axis; each of the ten airfoil surface airfoil curve rotates a certain degree with the leading edge point of the airfoil surface airfoil curve as the center in a plane which passes through the leading edge point of the airfoil surface airfoil curve and is perpendicular to the Z axis. The high-aerodynamic performance wind turbine blade has the advantages of low start-up wind speed, low work noise and smooth power output characteristics on the basis of high aerodynamic performance.

Description

technical field [0001] The invention relates to a wind turbine blade, in particular to an airfoil structure of the wind turbine blade, and belongs to the technical field of wind energy utilization. Background technique [0002] A wind turbine is a device that absorbs wind energy through the blades of the wind rotor, and then converts mechanical energy into electrical energy. The wind rotor is the key power component of the wind turbine, which determines the efficiency of wind energy extraction. The wind rotor is composed of blades, hub and shaft. The generator is connected to the shaft of the wind rotor through the main shaft, and the function is to convert the mechanical energy output by the wind rotor into electrical energy and output it. It can be seen that the blades of the wind rotor determine the wind energy utilization rate of the wind turbine. The wind turbine blade is composed of two parts: the blade airfoil and the blade root. The structure of the blade airfoil d...

AI Technical Summary

Problems solved by technology

[0004] 1. When operating at a low Reynolds number, the leading edge of the blade is more sensitive to roughness changes, and the lift-to-drag ratio deteriorates seriously, which greatly affects the stability of its power output

[0005] 2. In a wide tip speed ratio range, the power coefficient change is prone to fluctuations, and stalling is prone to occur, and the power peak also has large fluctuations

[0006] 3. The start-up wind speed requirements of wind turbines are relatively high, which is not suitable for the utilization of low-speed wind energy resources

[0007] 4. The utilization rate of wind energy is low, resulting in a low effective utilization rate of wind resources in the wind power generation system as a whole

[0008] 5. The aerodynamic noise is large during operation, which affects the surrounding environment

[0009] The existence of the above problems seriously restricts the effective utilization of wind energy and the development process of the wind turbine industry

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