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Efficient low-load wing section special for horizontal shaft wind turbine blade and designing method of wind section

A technology of wind turbine blade and design method, which can be applied to wind turbines, wind turbines, mechanical equipment and other directions that are consistent with the wind direction, and can solve problems such as increasing the ultimate load of the blades.

Active Publication Date: 2013-04-17
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

However, the maximum lift coefficient has little effect on the output power of the blade, and the increase of the maximum lift coefficient will cause the increase of the ultimate load of the blade.

Method used

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  • Efficient low-load wing section special for horizontal shaft wind turbine blade and designing method of wind section
  • Efficient low-load wing section special for horizontal shaft wind turbine blade and designing method of wind section
  • Efficient low-load wing section special for horizontal shaft wind turbine blade and designing method of wind section

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Embodiment Construction

[0043] The present invention will be described in detail below in conjunction with examples and accompanying drawings.

[0044] The force on the airfoil is the resultant force of the distributed forces acting on the upper and lower surfaces. There are two types of surface forces, one is normal force and the other is tangential force. Define the resultant force perpendicular to the incoming flow in the far front as the lift force, and the resultant force in line with the direction of the incoming flow in the far side as the drag force. Lift and drag are usually expressed as dimensionless lift and drag coefficients. The lift coefficient and drag coefficient of the airfoil change with the angle of attack, which can form the lift characteristic and drag characteristic curve. At first, the lift coefficient of the airfoil increases with the angle of attack. When the angle of attack reaches a certain value, the lift coefficient reaches its maximum value, which is recorded as the max...

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Abstract

The invention discloses a designing method of an efficient low-load wing section special for a horizontal shaft wind turbine blade and the wing section obtained on the basis of the method. The designing method is based on an anti-design method, and the designed wing section is efficient, low-load, good in variable working conditions, and smooth in stalling. The efficient low-load wing section has the advantages that a designing goal of traditional wing sections is changed, and a pneumatic characteristic required by the wing section is provided; the wind section has high maximum lift-drag ratio, high designed lift coefficient and low maximum lift coefficient, and low lift coefficient decreasing under the condition front edge roughness is achieved; the anti-design method is utilized to design the wing section; and corresponding pneumatic parameter designing indexes are provided aiming at wing section applied to the outer sides, with thickness not more than 25%, of wind turbine blades.

Description

technical field [0001] The present invention relates to a special airfoil design method for horizontal axis wind turbine blades, in particular to a special airfoil design for horizontal axis wind turbine blades with high efficiency and low load, good variable working condition characteristics and smooth stall characteristics based on the inverse design method design method. Background technique [0002] Wind turbine blades are the core components of wind turbines, and the performance of the special airfoil for wind turbine blades directly affects the performance of wind turbine blades. The blades not only have aerodynamic performance requirements but also load requirements. We hope that the wind turbine has a higher output power and a lower load at the same time, especially the increase of the ultimate load has a greater impact on the wind turbine blades. [0003] The design of wind turbine blades has always required that the special airfoil of the wind turbine has a high m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D1/06
CPCY02E10/72
Inventor 白井艳杨科李星星徐建中
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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