Enclosure structure, and aerodynamic configuration adjuster arranged on outer surface of same

Patent metadata

Field	Value
Publication number	US-11454041-B2
Application number	US-201817043522-A
Country	US
Kind code	B2
Filing date	Oct 23, 2018
Priority date	Jun 21, 2018
Publication date	Sep 27, 2022
Grant date	Sep 27, 2022

Abstract

An enclosure structure, and an aerodynamic configuration adjuster arranged on an outer surface of same are provided. The aerodynamic configuration adjuster is of a grid structure capable of surrounding the enclosure structure, and the grid structure comprises a plurality of grid cells, at least some of grid cells have bevel edges, and the attack angle of a fluid is changed when the fluid passes over the bevel edges. The aerodynamic configuration adjuster changes the aerodynamic configuration of the fluid, and thus the resistance coefficient becomes smaller such that a pressure differential between the pressures at a incident flow surface and a back surface of the enclosure structure is reduced, thereby reducing a forward resistance; and in addition, due to a smaller resistance coefficient, the amplitude of a transverse vortex-induced resonance can also be reduced, thereby reducing vibration.

First claim

The invention claimed is:

1. An aerodynamic configuration adjuster arranged on an outer surface of an enclosure structure, wherein the aerodynamic configuration adjuster has a grid-like structure configured to surround the enclosure structure, the grid-like structure comprises a plurality of grid cells, at least part of the grid cells have an oblique side, and an attack angle changes when a fluid passes through the oblique side; wherein
the aerodynamic configuration adjuster comprises a plurality of vertically distributed adjustment grid layers and at least one decoupling grid layer, the at least one decoupling grid layer is provided between two of the plurality of adjustment grid layers arranged in an upper and lower direction, and a shape of the decoupling grid layer is different from a shape of each of the plurality of adjustment grid layers.

2. The aerodynamic configuration adjuster arranged on the outer surface of the enclosure structure according to claim 1 , wherein the adjustment grid layers are configured to surround the enclosure structure, the adjustment grid layers comprise the plurality of grid cells, the plurality of grid cells has the oblique side, and the adjustment grid layers have a plurality of oblique sides with a same oblique direction and a same length, and when the fluid passes through the plurality of oblique sides, the aerodynamic configuration is approximately of an elliptical shape.

3. The aerodynamic configuration adjuster arranged on the outer surface of the enclosure structure according to claim 2 , wherein each grid cell in a same adjustment grid layer has a same shape and size; or each grid cell in all the adjustment grid layers has a same shape and size.

4. The aerodynamic configuration adjuster arranged on the outer surface of the enclosure structure according to claim 3 , wherein each grid cell of the adjustment grid layers is of an isosceles triangle shape, and each of the adjustment grid layers is formed by connecting a normal isosceles triangle grid cell and an inverse isosceles triangle grid cell in sequence; or,
each grid cell of the adjustment grid layers is of a parallelogram shape, and each of the adjustment grid layers is formed by connecting a plurality of parallelogram grid cells with a same oblique direction; or,
each grid cell of the adjustment grid layers is of a rhombus shape, and each of the adjustment grid layers is formed by connecting a plurality of rhombic grid cells.

5. The aerodynamic configuration adjuster arranged on the outer surface of the enclosure structure according to claim 3 , wherein all the grid cells in the adjustment grid layers are the same, and a shape of each grid cell in the decoupling grid layer is different from a shape of each grid cell in the adjustment grid layers.

6. The aerodynamic configuration adjuster arranged on the outer surface of the enclosure structure according to claim 4 , wherein
the decoupling grid layer comprises a plurality of non-isosceles triangle grid cell groups, and each of the non-isosceles triangle grid cell groups comprises two non-isosceles triangle grid cells with a same shape whose vertex angles are opposite; a base of each non-isosceles triangle is a base of the corresponding grid cell of the adjacent adjustment grid layer; and a non-equilateral quadrilateral grid cell is formed between two adjacent non-isosceles triangle grid cell groups.

7. The aerodynamic configuration adjuster arranged on the outer surface of the enclosure structure according to claim 6 , wherein, in the decoupling grid layer, the vertex angles of the two non-isosceles triangle grid cells of each non-isosceles triangle grid cell group form a node, the nodes of a plurality of groups of the non-isosceles triangle grid cell groups are connected, and a connected grid line is provided with a trip ball in the non-equilateral quadrilateral grid cell.

8. The aerodynamic configuration adjuster arranged on the outer surface of the enclosure structure according to claim 4 , wherein, in two adjacent adjustment grid layers in an upper and lower direction, the parallelogram grid cells are arranged inversely.

9. The aerodynamic configuration adjuster arranged on the outer surface of the enclosure structure according to claim 1 , wherein the grid-like structure is provided with a plurality of nodes, and each of the nodes is a ball or a semi-spherical ball or a rugby ball facing outward, forming a trip ball.

10. The aerodynamic configuration adjuster arranged on the outer surface of the enclosure structure according to claim 9 , wherein a cross section of grid lines of the grid-like structure is a quadrilateral or a circle.

11. The aerodynamic configuration adjuster arranged on the outer surface of the enclosure structure according to claim 1 , wherein the grid-like structure is a flexible or elastic grid, which is stretchable in a height direction, to change a height of each grid cell and a cross-sectional area of the grid lines of the grid-like structure.

12. The aerodynamic configuration adjuster arranged on the outer surface of the enclosure structure according to claim 11 , wherein a pulling ring configured to surround the enclosure structure is provided at a base or a top side of the grid-like structure to pull the grid cell and adjust the height of each grid cell.

13. The aerodynamic configuration adjuster arranged on the outer surface of the enclosure structure according to claim 11 , wherein the grid-like structure is detachably connectable after surrounding the enclosure structure.

14. An enclosure structure, wherein at least part of an outer surface of the enclosure structure is provided with the aerodynamic configuration adjuster arranged on the outer surface of the enclosure structure according to claim 1 .

15. The enclosure structure according to claim 14 , wherein the enclosure structure is a tower of a wind turbine, a television tower, an anemometer tower, or an aquatic building with an underwater part, or a land pillar pier, or a land pillar.

16. The enclosure structure according to claim 15 , wherein a height of each grid cell gradually increases from top to bottom; and at least an outer surface of an upper part of the enclosure structure is provided with the aerodynamic configuration adjuster, and the upper part is located above ½ of a height of the tower.

17. The enclosure structure according to claim 16 , wherein the enclosure structure is the tower of the wind turbine and a height of the aerodynamic configuration adjuster is not less than a length of a blade.

Assignees

• Beijing Goldwind Science & Creation Windpower Equipment Co Ltd

Inventors

• Ma Shengjun

Classifications

• F05B2240/912

  on a tower · CPC title

• F03D13/20 Primary

  Arrangements for mounting or supporting wind motors; Masts or towers for wind motors · CPC title

• F05B2260/96

  Preventing, counteracting or reducing vibration or noise · CPC title

• E04H12/00

  Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures (cooling towers E04H5/12; derricks for oil drilling E21B15/00) · CPC title

• F03D80/00

  Details, components or accessories not provided for in groups F03D1/00 - F03D17/00 · CPC title