Contoured blade outer air seal for a gas turbine engine

Patent metadata

Field	Value
Publication number	US-10612407-B2
Application number	US-201414771281-A
Country	US
Kind code	B2
Filing date	Feb 4, 2014
Priority date	Feb 28, 2013
Publication date	Apr 7, 2020
Grant date	Apr 7, 2020

Abstract

A blade outer air seal (BOAS) segment according to an exemplary aspect of the present disclosure includes, among other things, a seal body having a radially inner face that circumferentially extend between a first mate face and a second mate face and axially extend between a leading edge face and a trailing edge face, wherein a radial position of the radially inner face varies at a given axial position.

First claim

We claim:

1. A blade outer air seal (BOAS) segment, comprising:
a seal body having a radially inner face that circumferentially extends between a first mate face and a second mate face and axially extends between a leading edge face and a trailing edge face, wherein a radial position of the radially inner face varies at a given axial position, the given axial position outside a rub track of the BOAS.

2. The BOAS segment of claim 1 , wherein the given axial position is upstream from the rub track of the radially inner face.

3. The BOAS segment of claim 2 , wherein the given axial position is a first given axial position, and a radial position of the radially inner face varies at a second given axial position that is downstream from the rub track of the radially inner face.

4. The BOAS segment of claim 1 , wherein the radial position of the radially inner face smoothly varies at the given axial position.

5. The BOAS segment of claim 1 , wherein the radial position of the radially inner face undulates at the given axial position between positions that are radially closer to a central axis and positions that are radially further from the central axis.

6. The BOAS segment of claim 1 , wherein the radial position of the radially inner face is contoured.

7. The BOAS segment of claim 1 , wherein the BOAS includes at least a layer of an additive manufacturing material.

8. A blade outer air seal (BOAS) assembly, comprising:
a BOAS segment including a radial inner face that circumferentially extends between a first mate face and a second mate face and axially extends between a leading edge face and a trailing edge face; and
at least one contour extending radially a prescribed distance from another area of the radially inner face, wherein at a given axial position, the contour varies a radial position of the radially inner face, the given axial position outside a rub track of the BOAS.

9. The BOAS assembly of claim 8 , wherein the at least one contour is entirely upstream from a rub track of the radially inner face.

10. The BOAS assembly of claim 8 , wherein the at least one contour includes at least one peak, trough, or both.

11. The BOAS assembly of claim 8 , wherein the at least one contour includes a contour having first axial end and an opposing, second axial end, an circumferential width of the first axial end greater than a circumferential width of the second axial end.

12. The BOAS assembly of claim 8 , wherein the at least one contour includes a first contour that is upstream from a rub track of the radially inner face and a second contour that is downstream from the rub track.

13. The BOAS assembly of claim 12 , wherein the second contour extends to the trailing edge face and is configured to align with a contour extending radially a prescribed distance from a vane wall of a vane stage that is directly downstream from the BOAS segment.

14. The BOAS assembly of claim 8 , including at least one cooling hole having an exit at the at the least one contour.

15. The BOAS assembly of claim 8 , wherein the BOAS segment is a first BOAS segment, and a second BOAS segment interfaces with the first BOAS segment at the first mate face, the second BOAS segment having a second radially inner face and at least one second contour extending radially a prescribed distance from the second radially inner face, wherein a position of the at least one first contour on the first radially inner face is different than a position of the at least one second contour on the second radially inner face.

16. A blade outer air seal (BOAS) assembly, comprising:
a BOAS segment including a radial inner face that circumferentially extends between a first mate face and a second mate face and axially extends between a leading edge face and a trailing edge face; and
at least one contour extending radially a prescribed distance from another area of the radially inner face, wherein the at least one contour includes a contour at the leading edge face configured to align with a contour extending radially a prescribed distance from a vane wall of a vane stage that is directly upstream from the BOAS segment.

17. A method of providing a Blade Outer Air Seal (BOAS) configured to influence flow within a gas turbine engine, comprising:
providing a feature of a BOAS, the feature configured to influence flow moving across a radially inner face of a BOAS, wherein the feature causes a radial position of the radially inner face to vary at a given axial position, the given axial position outside a rub track of the BOAS.

18. The method of claim 17 , wherein the feature is a continuation of a feature of a vane wall that is axially adjacent the BOAS.

19. The method of claim 17 , using an additive manufacturing process to form at least a portion of the BOAS.

20. An assembly, comprising:
a vane segment;
a blade outer air seal (BOAS) segment adjacent the vane segment; and
a radially extending contour;
wherein the contour resides on both the vane segment and the BOAS segment,
wherein, at a given axial location that is aligned with the contour residing on the vane segment, a radial position of a radially inner face of the vane segment varies radially,
wherein, at a given axial location that is aligned with the contour residing on the BOAS segment, a radial position of a radially inner face of the BOAS segment varies radially.

21. The assembly of claim 20 , wherein the contour is located on a vane wall of the vane segment.

22. The assembly of claim 20 , wherein the contour is located on a radially inner face of the BOAS.

23. The assembly of claim 20 , wherein the contour includes at least one peak, trough, or both.

24. The assembly of claim 20 , wherein the vane segment is upstream of the BOAS segment.

25. The assembly of claim 20 , wherein the vane segment is downstream of the BOAS segment.

26. The assembly of claim 20 , further comprising:
a second vane segment adjacent the BOAS segment, wherein the BOAS segment is located between the vane segment and the second vane segment; and
a second contour residing on both the second vane segment and the BOAS segment.

27. The assembly of claim 20 , including at least one cooling hole having an exit at the contour.

28. The assembly of claim 26 , further comprising:
a third vane segment adjacent the vane segment or the second vane segment; and
a third contour residing on both the third vane segment and the BOAS segment.

29. The assembly of claim 20 , further comprising:
a second vane segment adjacent the BOAS segment and the second vane segment; and
a second contour residing on both the second vane segment and the BOAS segment.

30. A vane segment locatable adjacent a blade outer air seal (BOAS) segment, the vane segment comprising:
a vane wall; and
a vane contour of the vane wall, the vane contour extending radially from other portions of said vane wall;
wherein said vane contour corresponds to a BOAS contour on the BOAS segment,
wherein, at a given axial location that is aligned with said vane contour, a radial position of a radially inner face of said vane wall varies radially.

31. A blade outer air seal (BOAS) segment locatable adjacent a vane segment, the BOAS segment comprising:
a radially inner face; and
a BOAS contour of the radially inner face, said BOAS contour extending radially from o

Assignees

• United Technologies Corp

Inventors

• Lutjen Paul M
• Bruskotter Michael J

Classifications

• F01D11/12 Primary

  using a rubstrip, e.g. erodible. deformable or resiliently-biased part · CPC title

• F01D9/041

  using blades (F01D5/148 takes precedence) · CPC title

• F05D2250/711

  convex · CPC title

• F05D2240/11

  Shroud seal segments · CPC title

• F05D2250/712

  concave · CPC title