Wind turbine blade with fractal sawtooth tail edge

Abstract

The invention provides a wind turbine blade with a fractal sawtooth tail edge. The wind turbine blade is characterized by comprising a wind turbine blade body and a plurality of fractal sawteeth, wherein the wind turbine blade body comprises a blade main body located at the front portion relative to the direction of an incoming flow and a blade tail edge located in the rear portion relative to thedirection of the incoming flow. The multiple fractal sawteeth are contentiously arranged on the blade tail edge in a spliced mode, and the sawtooth lines of the fractal sawteeth are Koch fractal curves or Koch fractal-like curves, wherein the Koch fractal curves and the Koch fractal-like curves are generated by conducting N-order generating element fractal on source graphs, and the source graphsare straight lines. According to the wind turbine blade with the fractal sawtooth tail edge, by arranging the multiple fractal sawteeth which are continuously arranged on the blade tail edge of the wind turbine blade, the Koch fractal curves and the Koch fractal-like curves represent irregularity gradually with increasing of orders, therefore, the fractal sawteeth can more accurately describe irregular objects in the nature, and accordingly, the optimal effect of reducing the noise of the blade tail edge is achieved.

Description

technical field [0001] The invention relates to a wind turbine blade, in particular to a wind turbine blade with a fractal serrated trailing edge. Background technique [0002] In the past ten years, with the development of my country's wind energy industry, wind power has surpassed nuclear power to become the third largest power supply source after thermal power and hydropower. The current wind farm construction is temporarily far away from the power load center and the access point of the power grid. Due to its long-distance and large-scale characteristics, it increases the cost of power consumption and sending projects. Therefore, the construction of wind farms will be gradually closer to the power load center, which means that wind farms will be closer to residential areas. [0003] However, as the construction of wind farms has tended to villages or will tend to towns and other residential areas, the noise generated by wind turbines during operation has affected the re...

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Problems solved by technology

[0005] But the shortcoming of above-mentioned method is exactly can't describe for the irregular shape of nature, only imitate the irregular shape of bird's wing caudal edge and fish fin caudal edge by traditional geometric shapes (such as triangle, rectangle and M shape etc.) , which will not give full play to its noise reduction ability

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