Air flow control device and fan blade including same, wind power generating set

Abstract

The invention discloses an air flow control device and a fan blade and a wind power generating set including the same. The air flow control device includes at least one control unit, and the control unit includes two oppositely arranged vertical plates and an exhaust assembly. The distance between the plates gradually increases from front to back, and the exhaust assembly has exhaust holes capable of injecting gas, and the exhaust holes are arranged in the rear area between the two vertical plates. The air flow control device of the present invention makes the air flow flowing through the surface of the fan blade flow through the area between the two vertical plates to generate vortex, blends the external energy of the boundary layer of the fan blade into the inside of the boundary layer, and increases the energy inside the boundary layer. Energy, and then the airflow ejected through the exhaust hole of the exhaust component drives the vortex center to move down, thereby strengthening the energy mixing of the boundary layer, further increasing the internal energy of the boundary layer, and improving the anti-separation ability of the boundary layer.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to an air flow control device, a fan blade and a wind power generating set including the same. Background technique [0002] When the wind turbine is running, if the angle of attack of the blade is too large, the blade will have boundary layer flow separation phenomenon, which is called blade stall. The flow separation will cause the lift force of the blade to drop rapidly and the resistance to rise rapidly, resulting in the decline of the aerodynamic performance of the blade and the power generation capacity. The loss was serious. With the increasing size of wind power blades, the requirements for the blade structure are getting higher and higher, and the airfoil with large thickness and blunt trailing edge has become the first choice for the airfoil at the root end of the blade. During the operation of wind turbines, the boundary layer flow separation in the root region of th...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defect that the boundary layer flow separation phenomenon of the wind power blades will occur in the prior art when the wind power generating set is running, and to provide an air flow control device and the fan blades and wind generating set containing it.

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