Noise reduction structure for blade of wind turbine generator

A technology of wind turbines and blades, which is applied in the field of noise reduction design of blade tips of wind turbines, and can solve problems affecting the normal life of residents, excessive noise, and obstacles to the development and utilization of wind resources.

Active Publication Date: 2016-11-30
广东明阳新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the development of wind power generation, remote areas suitable for wind power generation will be saturated, and it is imperative to develop wind power resources away from densely populated areas. However, excessive noise will affect the normal life of residents and become a densely populated area for wind power development and utilization. Barriers to Regional Wind Resources

Method used

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  • Noise reduction structure for blade of wind turbine generator
  • Noise reduction structure for blade of wind turbine generator
  • Noise reduction structure for blade of wind turbine generator

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Such as Figure 1 to Figure 5 As shown, the noise reduction structure of the wind turbine blade described in this embodiment includes a plurality of cross-shaped noise reduction parts 1, and the plurality of cross-shaped noise reduction parts 1 are evenly distributed in the 75%-95% span of the blade 2. % on the trailing edge 3 corresponding to the position or on all the trailing edges 3 of the blade, the leading edge 4 of the blade remains unchanged, and the arrangement distance a of two cross-shaped noise-reducing parts 1 (that is, two adjacent cross-shaped noise-reducing parts 1 in each The distance between the centerlines in the length direction) is 40%-50% of the length b of the cross-shaped noise reduction piece, and each cross-shaped noise reduction piece 1 is composed of two orthogonal gourd-like flat pieces, and the two flat pieces The lengths of the flat parts are completely overlapped, and the narrow end of the flat part faces outwards, its cross-section is el...

Embodiment 2

[0029] Different from Embodiment 1, the flat piece described in this embodiment is distributed with spherical protrusions (such as Figure 6 shown).

Embodiment 3

[0031] The difference from Embodiment 1 is that the flat piece described in this embodiment is distributed with cylindrical protrusions (not shown in the figure).

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Abstract

The invention discloses a noise reduction structure for a blade of a wind turbine generator. The noise reduction structure comprises multiple cross-shaped noise reduction parts which are spaced and evenly distributed on the rear edge corresponding to the position of the blade stretched by 75%-95% or on the whole rear edge of the blade, and the arrangement distance between every two cross-shaped noise reduction parts is 40%-50% of the length of each cross-shaped noise reduction part. Each cross-shaped noise reduction part is composed of two orthogonal gourd-like flat parts, wherein the narrow end of each flat part is outward, the cross section of each flat part is oval, the maximum thickness of each flat part is smaller than or equal to the thickness of the rear edge of the blade and is gradually reduced in the airflow direction, the maximum width of each flat part is 20%-30% of the length of each flat part, and the length of each flat part is controlled at 15%-25% of the chord length of the blade. Through the noise reduction structure, the noise of the blade can be effectively lowered, and meanwhile aerodynamic efficiency of the blade is improved.

Description

technical field [0001] The invention relates to the technical field of noise reduction design of blade tip of a wind power generator set, in particular to a noise reduction structure of a wind power generator blade. Background technique [0002] It is known in the industry that when the wind turbine is in operation, the rotating blades, especially the blade tips, will cut the air at a high linear velocity and generate aerodynamic noise. Existing studies have shown that aerodynamic noise mechanisms can be classified into the following categories: a) boundary layer flow shedding from the trailing edge of the blade; b) boundary layer separation; c) vortex shedding due to boundary layer instability; The resulting vortex shedding. [0003] With the development of wind power generation, remote areas suitable for wind power generation will be saturated, and it is imperative to develop wind power resources away from densely populated areas. However, excessive noise will affect the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D1/06
CPCF03D1/0675F05B2260/96Y02E10/72
Inventor 郭峰李军向
Owner 广东明阳新能源科技有限公司
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