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Large-thickness blunt-trailing-edge wind turbine blade

A technology of wind turbine blades and blunt trailing edges, which is applied to wind turbines, wind turbine components, engines, etc., to achieve the effects of improving structural efficiency, reducing blade mass, and improving aerodynamic performance

Active Publication Date: 2014-04-09
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, no specific disclosure has been made on the transition treatment method of the thickness of the trailing edge, and no specific instructions have been given on how to use other relative thickness airfoils to improve the overall performance of the blade after the large-thickness blunt trailing edge airfoil is adopted

Method used

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  • Large-thickness blunt-trailing-edge wind turbine blade
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  • Large-thickness blunt-trailing-edge wind turbine blade

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Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0035] refer to figure 1, the large-thickness blunt trailing edge wind turbine blade of the present invention includes a blade cylindrical section 10, a blade transition section 20 and a blade front end 30, and the blade transition section between the circular section 1 connecting the blade root and the maximum chord length section 2 of the blade Within 20, select one or more spanwise positions to place one or more standard airfoil families with large thickness blunt trailing edges developed by the Institute of Engineering Thermophysics, Chinese Academy of Sciences, with a relative thickness of more than 40%, see Figures 2 to 6 , the relative thickness of the airfoil includes four types of large-thickness blunt trailing edge airfoils of 45%, 50%, 55% ...

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Abstract

The invention relates to a large-thickness blunt-trailing-edge wind turbine blade. At least one large-thickness blunt-trailing-edge standard airfoil with a relative thickness which is larger than 40% is adopted in a blade transition section (20) connecting a circular section (1) of a blade root and the largest-chord-length section (2) of the blade. Meanwhile, a blade pneumatic appearance optimization design technique is adopted, so that the distribution range of blade sections of the airfoil with a relative thickness which is larger than 30% in the spreading direction accounts for at least 35% of the position ratio from the blade root to the section spreading direction. Smooth transition is carried out on trailing edges of sections around the large-thickness blunt-trailing-edge standard airfoil in a certain trailing-edge thickness transition mode so that all of or a part of the trailing edges of the blade are blunt trailing edges.

Description

technical field [0001] The patent of the present invention relates to a wind turbine blade, especially a large-thick blunt trailing edge wind turbine blade. It specifically relates to the design and manufacture of blades. Background technique [0002] Traditional large wind turbine blades generally adopt a sharp trailing edge structure. In order to achieve a geometrically smooth transition between the cylindrical section of the blade root and the front end of the trailing edge of the blade tip, there is a transition section with a relatively large thickness, and its relative thickness is more than 40%. Since the cross-sectional geometric shape of the transition section is obtained by interpolation, the cross-section of different blades with the same relative thickness in the span direction may have different shapes, which is not a standard geometric airfoil, and the operating environment and characteristics of the cross-section here are not fully considered. [0003] Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D11/00
CPCY02E10/722Y02E10/72
Inventor 廖猜猜张明明张磊陈啸杨科赵晓路徐建中
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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