Cooled component

Patent metadata

Field	Value
Publication number	US-10494928-B2
Application number	US-201514858490-A
Country	US
Kind code	B2
Filing date	Sep 18, 2015
Priority date	Oct 6, 2014
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

A cooled gas turbine engine component comprises a wall which has a plurality of effusion cooling apertures extending there-through from a first surface to a second surface. Each aperture has an inlet in the first surface and an outlet in the second surface. Each aperture has a metering portion and a diffusing portion arranged in flow series and each metering portion is elongate and the width is greater than the length of the metering portion. The metering portion of each aperture has a U-shaped bend. The diffusing portion of each aperture is arranged at an angle to the second surface. Each outlet has a rectangular shape in the second surface of the wall. Each inlet has an elongate shape in the first surface of the wall and the inlet in the wall is arranged substantially diagonally with respect to the outlet in the wall.

First claim

The invention claimed is:

1. A cooled component comprising:
a wall having a first surface and a second surface, the wall having a plurality of effusion cooling apertures extending there-through from the first surface to the second surface;
each effusion cooling aperture of the plurality of effusion cooling apertures having:
an inlet in the first surface;
an outlet in the second surface; and
a metering portion and a diffusing portion arranged in flow series from the inlet to the outlet, the metering portion being elongate and having a width and length, the width of the metering portion being greater than the length of the metering portion, the metering portion of said each effusion cooling aperture comprising:
an inlet portion;
a longitudinally upstream extending portion that extends from the inlet portion longitudinally toward an upstream end of the wall;
a U-shaped bend portion having an upstream wall and a downstream wall curving along a same direction; and
a longitudinally downstream extending portion that extends from the U-shaped bend portion longitudinally toward a downstream end of the wall, wherein:

the longitudinally upstream extending portion is defined by a first upper surface, a first lower surface and two side surfaces, each of the two side surfaces respectively connecting the first upper surface and the first lower surface;
the longitudinally downstream extending portion is defined by a second upper surface different from the first upper surface, a second lower surface different from the first lower surface and another two side surfaces, each of the other two side surfaces respectively connecting the second upper surface and the second lower surface;
the inlet of said each effusion cooling aperture is downstream of the U-shaped bend portion;
the outlet of said each effusion cooling aperture is downstream of the U-shaped bend portion;
the U-shaped bend portion of said each effusion cooling aperture is a most upstream portion of said each effusion cooling aperture with respect to the upstream end of the wall;
the diffusing portion of said each effusion cooling aperture is arranged at an angle to the second surface; and
each outlet has a quadrilateral shape in a plane of the second surface of the wall.

2. The cooled component as claimed in claim 1 , wherein
the outlet of said each effusion cooling aperture has a shape selected from the group consisting of a rectangular shape, a parallelogram shape, a rhombus shape and an isosceles trapezium shape.

3. The cooled component as claimed in claim 2 , wherein:
the outlet of said each effusion cooling aperture has a rectangular shape; and
the outlet of said each effusion cooling aperture is arranged such that two sides of the rectangular shape extend laterally and two sides of the rectangular shape extend longitudinally.

4. The cooled component as claimed in claim 2 , wherein:
the outlet of said each effusion cooling aperture has a rhombus shape or an isosceles trapezium shape; and
the outlet of said each effusion cooling aperture is arranged such that two sides of the rhombus or isosceles trapezium shape extend laterally and two sides of the rhombus or isosceles trapezium shape extend longitudinally and laterally.

5. The cooled component as claimed in claim 1 , wherein:
the inlet of said each effusion cooling aperture has a curved upstream end wall, a curved downstream end wall and curved side walls;
the curved upstream end wall is concave;
the curved downstream end wall is convex; and
the curved side walls are concave.

6. The cooled component as claimed in claim 5 , wherein
the curved upstream and downstream end walls diverge in a longitudinal, axial, direction of the wall.

7. The cooled component as claimed in claim 1 , wherein:
the plurality of effusion cooling aperture are arranged in longitudinally spaced rows; and
the plurality of effusion cooling aperture in each row are laterally spaced apart.

8. The cooled component as claimed in claim 7 , wherein
the plurality of effusion cooling aperture in each row are offset laterally from
the plurality of effusion cooling aperture in each adjacent row.

9. The cooled component as claimed in claim 1 , wherein
a ratio of the width of the metering portion to the length of the metering portion is from 3 to 1 to 8 to 1.

10. The cooled component as claimed in claim 1 , wherein
the metering portion is arranged at an angle of between 10° and 20° to the second surface.

11. The cooled component as claimed in claim 1 , wherein:
the first surface is corrugated; and
corrugations in the first surface are longitudinally spaced.

12. The cooled component as claimed in claim 11 wherein
the U-shaped bend portion of the metering portion of each effusion cooling aperture is aligned longitudinally with a corresponding one of the corrugations in the first surface of the wall.

13. The cooled component as claimed in claim 1 , wherein:
the first surface has a plurality of rows of bulges;
the bulges in each row of the plurality of rows are laterally spaced; and
the plurality of rows of bulges are longitudinally spaced.

14. The cooled component as claimed in claim 13 , wherein
a junction between the longitudinally upstream extending portion and the U-shaped bend portion of the metering portion of each effusion cooling aperture is aligned laterally and longitudinally with a point of a corresponding bulge of the bulges in the first surface of the wall, the point being at a maximum distance of the first surface from the second surface of the wall.

15. The cooled component as claimed in claim 1 , wherein:
the length of the metering portion of the plurality of effusion cooling aperture is 0.3 mm;
the width of the metering portion of the plurality of effusion cooling aperture is 0.9 mm;
the longitudinally upstream extending portion and the longitudinally downstream extending portion of the metering portion of the plurality of effusion cooling aperture are arranged at an angle of 12° to the second surface; and
a surface of the diffusing portion of the effusion cooling apertures is arranged at an angle of 12° to the second surface to form the diffusing portion.

16. The cooled component as claimed in claim 1 , wherein:
the length of the metering portion of the plurality of effusion cooling aperture is 0.3 mm;
the width of the metering portion of the plurality of effusion cooling aperture is 0.9 mm;
the longitudinally upstream extending portion and the longitudinally downstream extending portion of the metering portion of the plurality of effusion cooling aperture are arranged at an angle of 17° to the second surface; and
a surface of the diffusing portion of the plurality of effusion cooling aperture is arranged at an angle of 17° to the second surface to form the diffusing portion.

17. The cooled component as claimed in claim 1 , wherein:
the cooled component comprises a second wall, the second wall having a third surface and a fourth surface;
the fourth surface of the second wall is spaced from the first surface of the wall; and
the second wall has a plurality of impingement cooling apertures extending there-through from the third surface to the fourth surface.

18. The cooled component as claimed in claim 17 , wherein:
the length of the metering portion of the plurality of effusion cooling aperture is 0.3 mm; and
the width of the metering portion of the plurality of effusion cooling aperture is 2.4 mm;
the longitudinally upstream extending portion and the longitudinally downstream extending portio

Assignees

• Rolls Royce Plc

Inventors

• Harding Stephen C
• Hucker Paul A
• Worth Nicholas

Classifications

• F23R2900/03044

  Impingement cooled combustion chamber walls or subassemblies · CPC title

• F01D9/065

  Fluid supply or removal conduits traversing the working fluid flow, e.g. for lubrication-, cooling-, or sealing fluids (see also F01D25/16, F01D25/24 and F01D25/26) · CPC title

• F23R2900/03042

  Film cooled combustion chamber walls or domes · CPC title

• F23R3/002

  Wall structures (F23R3/02 and F23R3/007 take precedence) · CPC title

• F05D2260/202

  by film cooling · CPC title