Wind turbine low frequency aerodynamic noise suppression device based on rotatable fairing

A technology of rotating rectification and aerodynamic noise, which is applied in the field of wind turbines, can solve the problems of low-frequency aerodynamic noise, etc., and achieve the effects of reducing low-frequency aerodynamic noise, reducing damage, and suppressing low-frequency aerodynamic noise

Inactive Publication Date: 2015-11-04
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a wind turbine low-frequency aerodynamic noise suppression devi...

Method used

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  • Wind turbine low frequency aerodynamic noise suppression device based on rotatable fairing
  • Wind turbine low frequency aerodynamic noise suppression device based on rotatable fairing
  • Wind turbine low frequency aerodynamic noise suppression device based on rotatable fairing

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Experimental program
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Effect test

Embodiment 1

[0037] Such as image 3As shown, the diameter of the wind turbine tower is D, the thickness of the bearing is h, the leading edge of the fairing adopts a circular design, which is close to the outer ring of the thrust ball bearing, and the point between the leading edge and the trailing edge of the fairing passes through a straight line connect. The angle between the trailing edge points of the fairing is α, and the value range of α is 30° to 90°.

Embodiment 2

[0039] Such as Figure 4 As shown, when the diameter of the wind turbine tower is D, the thickness of the bearing is h, the leading edge of the fairing adopts a circular design, which is close to the outer ring of the thrust ball bearing, and the point between the leading edge and the trailing edge of the fairing passes through Streamlined curve connections.

[0040] The invention installs a rotatable fairing on the tower of the wind turbine, utilizes the downwind wind turbine to have the function of automatically yawing against the wind, and when the nacelle rotates, the fairing is driven to rotate through a linkage rod, so that the tail edge of the fairing is always Align the cabin. The airflow flows through the streamlined fairing, and the Karman vortex street structure of the wake of the wind turbine tower is suppressed. At the same time, the velocity loss of the airflow is reduced, and the surface pressure fluctuation of the wind turbine blades passing through the wake a...

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Abstract

The invention provides a wind turbine low frequency aerodynamic noise suppression device based on a rotatable fairing and relates to wind turbines. The wind turbine low frequency aerodynamic noise suppression device based on the rotatable fairing is provided with a linkage rod, the fairing, a tower and a thrust ball bearing, wherein the upper end of the linkage rod is fixed to an engine room; the lower end of the linkage rod is embedded into the fairing, and the fairing is installed on the tower; when the engine room rotates, the linkage rod drives the fairing to rotate synchronously, and the tailing edge of the fairing is made to be aligned with an engine room all the time; a structure with two symmetrical and combined parts is adopted in the fairing, and the tail end of the fairing is firmly and fixedly connected; and the front end of the fairing is firmly and fixedly connected with the rotating end of the thrust ball bearing, and the fixed end of the thrust ball bearing is fixed to the tower. By the adoption of the rotatable fairing, the strength of the wake flow karman vortex street of the tower is reduced, the speed loss of the airflow is reduced, and the effect of reducing low frequency aerodynamic noise of a wind turbine is achieved; the structure is simple, and the implementation is easy; the periodical change acting force generated by dropping of a tailing vortex of the tower of the wind turbine can be evidently reduced, and therefore the damage caused by vortex-induced vibration is reduced; and a complex control system is avoided.

Description

technical field [0001] The invention relates to a wind turbine, in particular to a wind turbine low-frequency aerodynamic noise suppression device based on a rotatable fairing. Background technique [0002] As a clean and renewable energy, wind energy has been paid more and more attention by countries all over the world. my country is rich in wind energy resources, and the government is also vigorously developing wind power generation. With the continuous expansion of wind power generation, the noise problem of wind turbines has become increasingly prominent. If it is not seriously studied and solved, it will become a major obstacle restricting the development of my country's wind power industry. [0003] Wind turbine noise can be divided into mechanical noise and aerodynamic noise according to the source. With the improvement of the mechanical design and manufacturing level of wind turbines, the mechanical noise of wind turbines has been greatly reduced, but the aerodynam...

Claims

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Application Information

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IPC IPC(8): F03D11/00
Inventor 陈荣钱王旭尤延铖朱呈祥
Owner XIAMEN UNIV
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