Bosses for fuel injection assemblies with cooling circuits, and combustors with bosses.

Abstract

This document provides a combustor, a boss, and a method for manufacturing the boss. [Solution] The combustor (17) includes a combustion liner (46) defining a combustion chamber (70). The combustor further includes an outer sleeve (48) spaced apart from the combustion liner such that an annular portion (47) is defined between the combustion liner and the outer sleeve. The combustor further includes a fuel injection assembly having a boss (300). The boss includes an inner flange (304) coupled to the combustion liner, an outer flange (302) spaced apart from the inner flange, and a body (306) extending between the outer flange and the inner flange. The boss defines a cooling circuit (318) fluid-coupled to the annular portion having a plurality of outlet channels (336) defined in the inner flange.

Claims

1. Combustor (17), A combustion liner (46) defines the combustion chamber (70), An outer sleeve (48) wherein the annular portion (47) is positioned at a distance from the combustion liner (46) such that it is defined between the combustion liner (46) and the outer sleeve (48), A fuel injection assembly (80) having a boss (300) coupled to the combustion liner (46) and the outer sleeve (48), wherein the boss (300) has an outer flange (302) coupled to the outer sleeve (48), an inner flange (304) coupled to the combustion liner (46), and a body (306) extending between the outer flange (302) and the inner flange (304), and the boss (300) fluidly coupled to the annular portion (47) and defining a cooling circuit (318) having a plurality of outlet channels (336) defined in the inner flange (304) A combustion device (17) equipped with this.

2. The combustor (17) according to claim 1, wherein at least one of the plurality of outlet channels (336) of the boss (300) is angled toward the front end (342) of the boss (300).

3. The combustor (17) according to any one of claims 1 to 2, wherein at least two of the plurality of outlet channels (336) of the boss (300) define different diameters (346, 348).

4. The combustor (17) according to any one of claims 1 to 3, wherein the boss (300) is solid and comprises the rear end of the inner flange (304) which has no outlet channel (336), and / or the plurality of outlet channels (336) are spaced apart around the inner flange (304).

5. The combustor (17) according to any one of claims 1 to 4, wherein the inner flange (304) of the boss (300) comprises an inner wall (310) and an impingement plate (312) positioned offset from the inner wall (310) toward the outer flange (302), and a post-impingement plenum (328) is defined on the inner flange (304) between the impingement plate (312) and the inner wall (310).

6. The combustor (17) according to claim 5, wherein the impingement plate (312) defines a plurality of impingement openings (316).

7. The inner flange (304) of the boss (300) further comprises an outer wall (308) offset from the inner wall (310) toward the outer flange (302), The cooling circuit (318) of the boss (300) is The inlet plenum (324) defined on the outer flange (302), A plain pinching plenum (326) is defined on the inner flange (304) between the outer wall (308) and the impingement plate (312), A passage (325) is defined in the main body (306) and extends between the entrance plenum (324) and the plain pinching plenum (326). Furthermore, The combustor (17) according to any one of claims 5 and 6.

8. The combustor (17) according to any one of claims 5 to 7, wherein the plurality of outlet channels (336) extend directly from the post-impingement plenum (328).

9. The combustor (17) according to any one of claims 1 to 8, wherein the boss (300) further comprises one or more heat transfer projections (366) extending from the inner wall (310) to the inside of the inner flange (304), more specifically to a plenum defined on the inside of the post-impingement plenum (328) according to claim 5.

10. The combustor (17) according to any one of claims 1 to 9, wherein the boss (300) defines a main passage (352) extending through the outer flange (302), the body (306), and the inner flange (304), and the cooling circuit (318) includes at least two inlets (320A, 320B) on either side of the main passage (352).

11. The combustor (17) according to any one of claims 1 to 10, wherein the inner wall (310) of the inner flange (304) of the boss (300) defines a part of the wall of the combustion chamber (70).

12. The combustor (17) according to any one of claims 1 to 11, wherein the boss (300) is an integrally formed, seamless unibody member.

13. A boss (300) for a fuel injection assembly (80) for use in a combustor (17) according to any one of claims 1 to 12, wherein the boss (300) is Outer flange (302) and, An inner flange (304), the inner flange (304) having an outer wall (308), an inner wall (310), the outer wall (308) having an inner wall (310) offset from the inner wall (310) toward the outer flange (302), and an impingement plate (312) disposed between the outer wall (308) and the inner wall (310) of the inner flange (304), The main body (306) extends between the outer flange (302) and the inner flange (304) and Equipped with, The aforementioned boss (300) is A post-impingement plenum (328) defined on the inner flange (304) between the impingement plate (312) and the inner wall (310), Multiple exit channels (336) are defined in the inner flange (304) and extend from the post-impingement plenum (328) A cooling circuit (318) is defined, which includes the following: Boss (300).

14. The boss (300) according to claim 13, wherein at least one of the plurality of outlet channels (336) is angled toward the front end (342) of the boss (300), and / or at least two of the plurality of outlet channels (336) define different diameters (346, 348), and / or the plurality of outlet channels (336) are spaced apart around the inner flange (304), and / or the rear end of the inner flange (304) is solid and has no outlet channels (336).

15. A method (1600) for manufacturing a boss for a fuel injection assembly (80), wherein the method (1600) is (a) A step (1602) in which a layer of powder in a powder bed (1120) is irradiated to form a fusion region, wherein the powder bed (1120) is placed on a construction plate (1002), (b) Step (1604) of providing a subsequent layer of powder on the powder bed (1120) by passing a recoater arm (1160) over the powder bed (1120) from the first side of the powder bed (1120), (c) Step (1606) is a repeat of steps (a) and (b) until the boss (300) is formed on the construction plate (1002), wherein the boss (300) is Outer flange (302) and, An inner flange (304), the inner flange (304) having an outer wall (308), an inner wall (310), and an impingement plate (312) disposed between the outer wall (308) and the inner wall (310), The main body (306) extends between the outer flange (302) and the inner flange (304) and Steps comprising Includes, The aforementioned boss (300) is A post-impingement plenum (328) defined on the inner flange (304) between the impingement plate (312) and the inner wall (310), Multiple exit channels (336) are defined in the inner flange (304) and extend from the post-impingement plenum (328) A cooling circuit (318) is defined, which includes the following: Method (1600).

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