Method for changing airfoil distribution of blade trailing edge side, blade, fan and method for manufacturing blade

A blade trailing edge and airfoil technology, which is applied in the field of deformable devices at the trailing edge of large wind turbine blades, can solve problems such as poor stall performance and stall, and achieve the effects of weakening strength, slowing down load, and improving loading conditions
CN106286145AInactive Publication Date: 2017-01-04AVIC HUITENG WINDPOWER EQUIP
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
AVIC HUITENG WINDPOWER EQUIP
Publication Date
2017-01-04
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention relates to a method for changing airfoil distribution of a blade trailing edge side, a blade, a fan and a method for manufacturing the blade. According to the method, a plurality of fiber boards are stuck near the maximum chord length of a suction surface of the blade, and then the suction surface generates a positive pressure during a normal laminar flow process near the maximum chord length, the fiber boards will not deform, and the power of the blade cannot be affected; and when the incidence angle of a cross section near the maximum chord length is large, the negative pressure is generated, the fiber boards deform, and then the adverse pressure gradient is decreased, and the strength of a harmful eddy is decreased. When the blade trailing edge side generates a harmful eddy, the influence of the eddy on the power and the load can be relieved through automatic deformation, and the blade can operate stably.
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Description

technical field

[0001] The invention relates to a deformable device for the trailing edge of a large wind turbine blade, which belongs to the application field of new energy technology, and in particular to a method for changing the airfoil distribution on the trailing edge side of the blade, and a deformable device provided on the trailing edge side A wind rotor blade, a fan using the wind rotor blade and a manufacturing method of the wind rotor blade. Background technique

[0002] As the length of the blade increases, the speed of the rotor tip increases gradually. When the blade is in normal operation, the angle of attack of the section near the maximum chord length is relatively large. As the angle of attack increases, the front stagnation point moves toward the trailing edge, and the suction peak of the airflow around the front edge increases, making it more difficult for the airflow behind the peak point to flow backward against the reverse pressure gradient, and the ...

Claims

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