Vortex generator for wind turbine blade, wind turbine blade and wind power generating apparatus, and method for manufacturing wind turbine blade

Patent metadata

Field	Value
Publication number	US-2023417217-A1
Application number	US-202118038226-A
Country	US
Kind code	A1
Filing date	Nov 26, 2021
Priority date	Nov 27, 2020
Publication date	Dec 28, 2023
Grant date	—

Abstract

A vortex generator for wind turbine blade is a vortex generator for wind turbine blade, the vortex generator being made of a resin, including: a platform; and at least one fin disposed projecting from an upper surface of the platform. The vortex generator includes a cavity that opens to a bottom surface of the platform and extends to an inside of the fin.

First claim

1 . A vortex generator for wind turbine blade, the vortex generator being made of a resin, comprising:
a platform; and at least one fin disposed projecting from an upper surface of the platform, wherein the vortex generator includes a cavity that opens to a bottom surface of the platform and extends to an inside of the fin.

2 . The vortex generator for wind turbine blade according to claim 1 ,
wherein a maximum value of a height of the cavity from the bottom surface of the platform is not less than HF/3, where HF is a distance between the bottom surface and a top portion of the fin in a height direction of the fin.

3 . The vortex generator for wind turbine blade according to claim 1 ,
wherein, at a maximum blade thickness position of the fin in a chordwise direction of the fin and on a plane which includes a position of a maximum thickness of the platform in a height direction of the fin and is parallel to the bottom surface of the platform, a height of the cavity from the bottom surface is not less than the maximum thickness of the platform.

4 . The vortex generator for wind turbine blade according to claim 1 ,
wherein, within a range in which a distance from the bottom surface of the platform in a height direction of the fin is not less than a maximum thickness of the platform and not greater than HF/3, where HF is a distance between the bottom surface and a top portion of the fin in the height direction,
the cavity is disposed in a region including a maximum blade thickness position of the fin in a chordwise direction of the fin, and
a length of the cavity in the chordwise direction is at least 30% of a chord length of the fin.

5 . The vortex generator for wind turbine blade according to claim 1 ,
wherein, within a range in which a distance from the bottom surface of the platform in a height direction of the fin is not less than a maximum thickness of the platform and not greater than HF/5, where HF is a distance between the bottom surface and a top portion of the fin in the height direction, a width of the cavity at a maximum blade thickness position of the fin in a chordwise direction of the fin is at least 50% of a blade thickness of the fin at the maximum blade thickness position.

6 . The vortex generator for wind turbine blade according to claim 1 ,
wherein, in at least 50% of an extension range of the cavity in a height direction of the fin, a wall thickness of the fin at a position of a leading edge of the fin and in a chordwise direction of the fin is at least 0.5 and at most 2.0 times an average of a maximum thickness and a minimum thickness of the platform.

7 . The vortex generator for wind turbine blade according to claim 1 ,
wherein the fin includes a leading edge portion having a curved contour in a cross section orthogonal to a height direction of the fin.

8 . The vortex generator for wind turbine blade according to claim 1 ,
wherein the fin has a shape symmetrical about a chord of the fin.

9 . The vortex generator for wind turbine blade according to claim 1 , comprising:
a rib extending inside the cavity and along a thickness direction of the fin.

10 . The vortex generator for wind turbine blade according to claim 9 ,
wherein the rib extends along a height direction of the fin over at least 70% of an extension range of the cavity in the height direction of the fin.

11 . The vortex generator for wind turbine blade according to claim 1 comprising:
a hole disposed in the fin, and communicating with the cavity as well as opening to a surface of the fin.

12 . A wind turbine blade, comprising:
a blade body; and the vortex generator according to claim 1 attached to a surface of the blade body.

13 . The wind turbine blade according to claim 12 , comprising:
a tape which has an adhesive surface adhered to the upper surface of the platform in the vortex generator and the surface of the blade body so as to cover an edge of the platform.

14 . A wind power generating apparatus, comprising:
a wind turbine rotor including the wind turbine blade according to claim 12 or 13 ; and a generator configured to be driven by the wind turbine rotor.

15 . A method for manufacturing a wind turbine blade including a blade body and the vortex generator according to claim 11 , comprising:
a step of adhering the vortex generator to a surface of the blade body; and a step of sucking internal air of the cavity via the hole.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Shiraishi Yasuaki
• Ariki Wakako
• Ueda Yoshiyuki

Classifications

• F03D1/06495 Primary

  Aerodynamic elements attached to or formed with the blade, e.g. flaps, vortex generators or noise reducers · CPC title

• F05B2250/33

  symmetrical · CPC title

• F05B2230/23

  by permanently joining parts together · CPC title

• F05B2240/3062

  Vortex generators · CPC title

• Y02E10/72

  Wind turbines with rotation axis in wind direction · CPC title