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Novel wind turbine blade

A wind turbine blade, a new type of technology, applied to wind turbines, wind turbines in the same direction as the wind, engines, etc., can solve problems such as not considering the influence of swinging torque, achieve weakened induced resistance, simple structure, and reduce induced resistance Effect

Inactive Publication Date: 2015-08-26
SHANGHAI JIAO TONG UNIV +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In these patent documents, the winglets all adopt a one-way bending method, which changes the distribution of circulation on the blades of the wind turbine and the vortex strength and structure of the blade tip, reduces the induced resistance on the blades, and improves the aerodynamic efficiency of the wind turbine, but none of them consider Influence of tiplet centrifugal force and aerodynamic load on flapping moment at the root of wind turbine blade

Method used

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Examples

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Embodiment 1

[0030] A new type of wind turbine blade, such as figure 1 As shown, the novel wind turbine blade includes a symmetrical winglet 1 , a blade tip extension 2 and a main blade 3 . The tip extension section 2 connects the symmetrical winglet 1 and the main blade 3, the symmetrical winglet 1 is installed at the end of the blade tip extension section 2, the symmetrical winglet 1 includes a first winglet 101 and a second winglet 102, the first winglet 101 The wing 101 and the second winglet 102 are arranged symmetrically, and both the first winglet 101 and the second winglet 102 have a lift airfoil, and the suction surfaces of the first winglet 101 and the second winglet 102 both face the wind turbine. In order to ensure the stability of the flow field, the thickness and chord length of the tip extension section 2 smoothly transition from the main blade 3 to the symmetrical winglet 1 .

[0031] figure 2 , image 3 A partial front view and a side view of the installation of the sy...

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Abstract

The invention provides a novel wind turbine blade which comprises a main blade body, a blade tip extension segment and symmetrical little wings. The blade tip extension segment is connected with the main blade body and the symmetrical little wings respectively. The chord length of the blade tip extension segment is in smooth transition from the blade tip chord length to the little wing root chord length. The symmetrical little wings comprise the first little wing and the second little wing. The first little wing and the second little wing are symmetrical to each other. Both the first little wing and the second little wing are provided with lifting airfoils. Both the suction surface of the first little wing and the suction surface of the second little wing face a wind turbine body. The novel wind turbine blade has the advantages that the blade tip vortex is reduced, the blade stress is balanced, the pneumatic efficiency of the wind turbine is improved, the blade root waving moment is lowered, the requirement for the strength level of all components of the wind turbine is lowered, the reliability degree of the components of the wind turbine is increased, and the power generation cost of the wind turbine is reduced.

Description

technical field [0001] The invention relates to a wind turbine blade, in particular to a novel wind turbine blade with symmetrical winglets. Background technique [0002] A wind turbine is a mechanical device that converts wind energy into electrical energy. The aerodynamic design level of the blades will affect the wind capture capacity of the wind turbine rotor, the selection of other components except the blades, the implementation level of the control strategy, and the reliability of the whole machine. Affects the cost of generating electricity from wind turbines. [0003] When the wind turbine is running, due to the pressure difference between the upper and lower surfaces of the blade (suction surface and pressure surface), the airflow passing through the upper and lower surfaces of the blade will not only roll up a counterclockwise rotating tip vortex on the top of the blade (from the blade leading edge to the direction of the trailing edge), and will converge into a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D1/06
CPCF03D1/0633F03D1/0675F05B2240/307Y02E10/72
Inventor 竺晓程司徒达志沈昕杜朝辉欧阳华田杰
Owner SHANGHAI JIAO TONG UNIV
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