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Wind turbine blades with trailing edge serrations

A technology of wind turbine blades and saw teeth, applied in the field of fluid reaction surfaces

Inactive Publication Date: 2009-03-25
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since trailing edge noise is mainly generated on the outside of the blade (where the speed is highest), any new low-noise airfoil design should only be applied to the outside of the blade span

Method used

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  • Wind turbine blades with trailing edge serrations
  • Wind turbine blades with trailing edge serrations
  • Wind turbine blades with trailing edge serrations

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Figure 6 is for figure 1 A schematic plan view of one embodiment of a wind turbine blade 30 for use with a wind turbine 2 or any other wind turbine is shown. The blade 30 includes a serrated trailing edge 32 extending inboard from a location immediately adjacent a tip 34 of the blade. For the example shown here, the serrated trailing edge 32 is divided into four adjacent serrated segments identified by Roman numerals I to IV. However, any other number of segments may be provided, each segment may be separated by a portion of the trailing edge without serrations and / or with other serrations.

[0025] Each segment of the serrated trailing edge 32 may be individually or sequentially formed from any material, including aluminum, plastic, reinforced plastic, fiber reinforced plastic, glass fiber reinforced plastic, and / or other materials. For example, the serrated trailing edge 32 may be formed as one or more relatively stiff plates that do not deform significantly under a...

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PUM

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Abstract

A wind generator and turbine blade includes a trailing edge having several serrations, a length of the serrations in each of a plurality of sections of the trailing edge is between approximately 10% and 40% of a mean chord for the corresponding section; and a length to width ratio of each of the serrations is between approximately 1:1 to 4:1.

Description

technical field [0001] The subject matter presented herein relates generally to fluid reactive surfaces with specific blade structures, and more specifically to wind turbine blades with trailing edge serrations. Background technique [0002] A wind turbine is a machine used to convert the kinetic energy of wind into mechanical energy. If this mechanical energy is used directly by the machine, for example to pump water or to grind wheat, then the wind turbine can be called a wind mill. Similarly, if the mechanical energy is further converted into electrical energy, the wind turbine may be referred to as a wind generator or wind power plant. [0003] Wind turbines use one or more airfoils in the form of "blades" to generate lift and capture the momentum of moving air that is then passed to the rotor. Each blade is typically fastened at its "root" end and then "spans" radially "outboard" to a free "tip" end. The leading edge, or "leading edge," of the blade connects the forw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D1/06
CPCF05B2260/96F05B2240/30Y02E10/721F03D1/0675F05B2250/183Y02E10/72
Inventor K·U·克格勒S·赫尔M·菲舍尔
Owner GENERAL ELECTRIC CO