Vane

Patent metadata

Field	Value
Publication number	US-2016273371-A1
Application number	US-201615051015-A
Country	US
Kind code	A1
Filing date	Feb 23, 2016
Priority date	Mar 18, 2015
Publication date	Sep 22, 2016
Grant date	—

Abstract

A vane for an exhaust system duct in a gas turbine engine including a vane plate, a guide plate, and a baffle. The vane plate includes a leading edge, a first leg and a second leg, with the first and second legs respectively extending on opposing sides of the leading edge to form a substantially U-shaped profile. The baffle connects respective distal ends of the first and second legs. The guide plate is accommodated within the vane plate, and includes a first aperture extending along the guide plate and aligned with the leading edge. The vane further includes a fluid inlet arranged, in use, to direct a fluid flow from outside the duct into an interior of the vane.

First claim

What is claimed is:

1 . A vane for an exhaust system duct in a gas turbine engine, the vane comprising:
a vane plate; a guide plate; and a baffle, wherein the vane plate comprises a leading edge, a first leg and a second leg, the first and second legs respectively extending on opposing sides of the leading edge to form a substantially U-shaped profile, the guide plate being accommodated within the vane plate, the baffle connecting respective distal ends of the first and second legs, the guide plate comprising a first aperture extending along the guide plate and being aligned with the leading edge, the vane further comprising a fluid inlet arranged, in use, to direct a fluid flow from outside the duct into an interior of the vane.

2 . The vane as claimed in claim 1 , wherein the first aperture is formed as a slot extending axially along the guide plate.

3 . The vane as claimed in claim 2 , wherein the slot has a streamlined cross-sectional profile.

4 . The vane as claimed in claim 2 , wherein the slot has a width of between approximately 1 mm and 3 mm.

5 . The vane as claimed in claim 2 , wherein the slot has a width that varies along the axial extent of the slot.

6 . The vane as claimed in claim 2 , wherein the slot comprises a plurality of slots arranged axially along the guide plate.

7 . The vane as claimed in claim 1 , wherein the first aperture is formed as a plurality of perforations extending axially along the guide plate.

8 . The vane as claimed in claim 1 , wherein the baffle is formed as a porous plate.

9 . The vane as claimed in claim 8 , wherein the porosity of the baffle varies along the axial extent of the baffle.

10 . The vane as claimed in claim 1 , the vane further comprising a vane body and first and second exhaust apertures, the vane body having opposing first and second surfaces, the first and second surfaces being contiguous with respective first and second legs of the vane plate, the first exhaust aperture being positioned at a juncture of the first surface and the first leg, and the second exhaust aperture being positioned at a juncture of the second surface and the second leg.

11 . The vane as claimed in claim 10 , wherein each of the first and second exhaust apertures comprises a slot extending axially along the vane, each slot being arranged to direct a fluid flow from a gap between the vane plate and the guide plate, over respective ones of the first and second surfaces.

12 . The vane as claimed in claim 10 , wherein each of the first and second exhaust apertures comprises a slot extending axially along the vane, each slot being arranged to direct a fluid flow from a gap between the vane plate and the guide plate, into a cavity defined between the first and second surfaces of the vane body.

13 . The vane as claimed in claim 10 , wherein each of the first and second exhaust apertures comprises a plurality of perforations extending axially along the vane, each plurality of perforations being arranged to direct a fluid flow from a gap between the vane plate and the guide plate, over respective ones of the first and second surfaces.

14 . The vane as claimed in claim 1 , wherein the fluid inlet comprises at least one scoop element arranged to direct a bypass fluid flow from outside the duct into the interior of the vane.

15 . The vane as claimed in claim 1 , the vane further comprising at least one flow guide element arranged to direct a fluid flow from outside the duct through the first aperture and into a gap between the vane plate and the guide plate.

16 . A gas turbine engine comprising a vane as claimed in claim 1 .

Assignees

• Rolls Royce Plc

Inventors

• Groom Alec R
• Ure Andrew J
• Avenell Christopher S

Classifications

• F05D2260/202

  by film cooling · CPC title

• F05D2240/121

  related to the leading edge of a stator vane · CPC title

• F01D9/023 Primary

  Transition ducts between combustor cans and first stage of the turbine in gas-turbine engines; their cooling or sealings · CPC title

• F05D2260/201

  by impingement of a fluid · CPC title

• F01D5/189

  the insert having a tubular cross-section, e.g. airfoil shape · CPC title