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Wind turbine blade with gurney flap

A technology of wind turbines and Gurney flaps, applied in the field of Gurney flaps, can solve the problems of failure, large bending force, difficult application, etc.

Pending Publication Date: 2022-04-12
功率曲线有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These flexible extension elements will allow the Gurney flaps to bend as the blade speed increases to reduce the drag effect of the Gurney flaps; however, these solutions are more difficult to apply and, due to the large bending forces involved, are more prone to over time fails over time

Method used

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  • Wind turbine blade with gurney flap
  • Wind turbine blade with gurney flap
  • Wind turbine blade with gurney flap

Examples

Experimental program
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Effect test

Embodiment Construction

[0042] figure 1 A cross-sectional view of a conventional airfoil 1 of a wind turbine blade is shown. The airfoil has a leading edge 2 , a trailing edge 4 , a chord C connecting the leading edge 2 and the trailing edge, a pressure surface 6 and a suction surface 8 . A detailed description of how the airfoil works will not be discussed here, as it is expected that those skilled in the art will be familiar with the theory behind the airfoil.

[0043] On the pressure surface 6, close to the trailing edge 4, a typical Gurney flap 10 is placed. This is known as Gurney flap positioning. The Gurney flap in this embodiment comprises a first flange 12 attached to the pressure surface of the blade and a second flange 14 extending perpendicular to the first flange and away from the pressure surface. Within the scope of the invention, the Gurney flaps can be placed in different positions and formed in different ways.

[0044] figure 2 A bottom view of a wind turbine blade 20 is schem...

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PUM

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Abstract

A wind turbine blade has a length L, an airfoil with a chord C, and a first gurney flap attached to a pressure or suction surface of the airfoil near a trailing edge of the wind turbine blade. The first gurney flap extends along at least 50% of an outer 1 / 3 length of the wind turbine blade. By mounting the gurney flap to an outer portion of the blade, the lift of the outer portion of the blade may increase or decrease depending on conditions of operation of the wind turbine.

Description

technical field [0001] The invention relates to a wind turbine blade having a length L, an airfoil with a chord C and a Gurney flap attached near the trailing edge of the blade. Background technique [0002] Wind turbine blades are typically manufactured in batches of wind turbine blades, wherein the entire batch has a standard shape and size. This is true even though it is well known that different blades will be used in different locations and under different environmental conditions. Batch manufacturing is used due to the cost advantage of manufacturing blades in batches. It is often not feasible to build custom blades for each location. [0003] However, in many cases the performance or functionality of a wind turbine blade can be improved via aerodynamic elements which can be added to the wind turbine blade after it has been manufactured. This aerodynamic element can even be added after the wind turbine has been erected and has been in use for some time. Many differ...

Claims

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Application Information

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IPC IPC(8): F03D1/06
CPCF03D1/0633F05B2240/304F05B2240/305Y02E10/72F05B2240/301
Inventor N·戈德恩
Owner 功率曲线有限公司
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