Ribbed and grooved type wind turbine blade

Abstract

The invention discloses a ribbed and grooved type wind turbine blade and belongs to the technical field of wind power utilization. The surface of the wind turbine blade is formed by ten airfoil-shaped surface airfoil-shaped curves through continuous smooth transition. Each airfoil-shaped surface airfoil-shaped curve is composed of two parts, namely a leeside curve body and a windward side curve body, and each leeside curve body is provided with a downward-concave curve and an upward-convex curve. Ten airfoil-shaped surfaces are sequentially arranged in the blade unfolding direction, and grooved and ribbed structures are formed on the surface of the blade after smooth transition of the downward-concave curves and the upward-convex curves of the leeside curve bodies of the ten airfoil-shaped surfaces. The ribbed and grooved structures on the surface of the blade can effectively resist bending deformation caused by conventional vibration of the blade, and fatigue damage resistant capacity of the blade is improved obviously. Meanwhile, the grooved and ribbed structures on the surface of the blade do not enable pneumatic performance of the blade to be lowered, but the blade has good pneumatic performance.

Description

technical field [0001] The invention relates to a wind turbine blade, in particular to a ribbed and slotted wind turbine blade, which 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. Wind turbine blades are the key power components of wind turbines, which determine the wind energy utilization rate of wind turbines. The wind turbine blade is composed of two parts: the blade airfoil and the blade root. The structure of the blade airfoil determines the aerodynamic performance of the wind wheel. The blade root is mainly responsible for the connection between the blade airfoil and the hub, and plays the role of blade support and positioning. effect. [0003] The structure of the traditional wind turbine blade airfoil is derived from the aviation airfoil, which leads to the following key tech...

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 large 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] 6. In order to pursue a high wind energy utilization rate, the blade airfoil design is thin, the bending resistance is poor, and it is easy to be damaged, resulting in frequent fatigue damage accidents caused by vibration during the operation of wind turbine equipment

[0010] 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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