Vortex generator for vibration reduction and load reduction of wind turbine generator tower frame, wind turbine generator and tower frame

A technology of vortex generators and wind turbines, which is applied in the field of wind power, can solve the problems of large vibration and small rigidity of flexible towers, and achieve the effects of low cost, suppression of air separation, and simple implementation

Pending Publication Date: 2020-04-21
GUODIAN UNITED POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Compared with the traditional tower, the rigidity of the flexible tower is relatively small, and under the same wind condition, the vibration is relatively large, which will have adverse effects on the tower itself, the blades and the transmission system

Method used

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  • Vortex generator for vibration reduction and load reduction of wind turbine generator tower frame, wind turbine generator and tower frame
  • Vortex generator for vibration reduction and load reduction of wind turbine generator tower frame, wind turbine generator and tower frame
  • Vortex generator for vibration reduction and load reduction of wind turbine generator tower frame, wind turbine generator and tower frame

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 2 A set of vortex generators 1 shown includes two flat plates 11, the two flat plates 11 are symmetrical about the central axis 12 of the vortex generator, and the angle between the bottom edge of each flat plate 11 and the central axis 12 is 15°- 60°, thus inducing a series of flow direction vortices.

[0032] For a single plate 11, it adopts a triangular structure, and the two base angles of the triangle are all less than 30°, so that no matter relative to figure 1 Wind direction shown or with figure 1 Opposite the wind direction, compared with the blunt body, the flat plate of this shape can make the air flow flow through more smoothly, thus generating less shape resistance. The above-mentioned two base angles may be the same or different, preferably in the form of an isosceles triangle with front and back symmetry. The height of the vortex generator 1 should be less than the thickness of the local boundary layer as much as possible, that is, the m...

Embodiment 2

[0041] Such as Figure 4 As shown, the difference between the vortex generator of this embodiment and Embodiment 1 is that it is in the form of a single plate, and the structure and installation layout of a single plate are exactly the same as in Embodiment 1, except that it is installed on the wind turbine tower 2 When going up, on the basis of embodiment 1, each group of vortex generators reduces a plate, Figure 4 The reduced flat plate is the lower side, of course the upper side can also be reduced.

[0042] To sum up, the present invention applies the vortex generator to the tower of the wind turbine, and can better adapt to different wind directions through the modified design, and can suppress the flow separation in the leeward area of ​​the tower, thereby reducing the aerodynamic load acting on the tower , which provides a feasible way for towers, especially flexible towers, to reduce vibration, improve the safety of wind turbines, and prolong fatigue life.

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Abstract

The invention discloses a vortex generator for vibration reduction and load reduction of a wind turbine generator tower frame, the wind turbine generator tower frame comprising vortex generators and awind turbine generator. Multiple groups of vortex generators are arranged at an outer surface of the tower frame, each group of vortex generators comprises one or two flat plates, each flat plate isof a triangular structure, a bottom edge of each triangle is connected with an outer surface of the tower frame, and two bottom angles of each triangle are smaller than 30 degrees; and when the two flat plates are arranged, the two flat plates are symmetrical about the central axis of a vortex generator. Multiple groups of vortex generators are spirally distributed on the outer surface of the tower frame. The vortex generator disclosed by the invention can adapt to various wind directions and can effectively inhibit airflow separation, so that a flow field behind the tower frame and corresponding aerodynamic force can be effectively changed, vortex-induced vibration of the tower frame is avoided by changing the frequency of the aerodynamic force acting on the tower frame, and vibration reduction and load reduction of the tower frame are truly realized from the source.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to a vortex generator for vibration reduction and load reduction of a wind turbine tower, a wind turbine tower and a wind turbine containing the same. Background technique [0002] In recent years, the focus of my country's wind power development has gradually shifted to areas with low wind speeds, and wind power manufacturers have continuously lengthened the blades to increase the power generation of the units. However, the blade cannot grow infinitely, because the growth of the blade will increase the load on the unit. Therefore, other methods should be explored to increase the power generation of wind turbines in low wind speed areas. It is a feasible way to increase the available hours of wind turbines by increasing the height of the tower. After the traditional tower is 100 meters, the weight will increase exponentially with the height, so the flexible tower came into being...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15D1/00F03D13/20
CPCF03D13/20F05B2260/96F15D1/003Y02E10/72Y02E10/728
Inventor 宋龙飞申艳杰袁凌潘磊王小虎刘伟超周文明刘栋
Owner GUODIAN UNITED POWER TECH
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