# US 2014/0190167 A1 · Ceramic combustor can for a gas turbine engine

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- Number: US 2014/0190167 A1
- Document ID: US20140190167A1
- Status: Published application
- Kind: A1
- Application number: 11/494,083
- Filed: 2006-07-27
- Published: 2014-07-10
- Earliest claimed: 2006-07-27
- Assignees: United Technologies Corporation
- Inventors: Jun Shi; David J. Bombara; Jason Lawrence; Richard S. Tuthill; Jeffery D. Melman
- Web page: https://patentgrep.com/patent/US20140190167A1

## CPC

- F23R 3/286: {having fuel-air premixing devices (F23R3/30 takes precedence)}
- F23R 3/007: {constructed mainly of ceramic components}
- F23R 3/283: {Attaching or cooling of fuel injecting means including supports for fuel injectors, stems, or lances}
- F23R 3/60: Support structures; Attaching or mounting means
- F23M 2900/05002: Means for accommodate thermal expansion of the wall liner
- F23R 2900/00017: Assembling combustion chamber liners or subparts
- F23R: GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS (fluidised bed combustion apparatus specially adapted for operation at superatmospheric pressures F23C10/16)
- F23M: CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR

## Abstract

A combustor assembly having a support assembly between a metal support assembly and a ceramic combustor can section that accommodates a thermal expansion difference therebetween. An air fuel mixer and an igniter are mounted to the support assembly secured to the ceramic combustion can which receives the ignition products of the ignited fuel and air mixture.

## Claims

### Claim 1

A combustor section comprising:
a support assembly having a first Coefficient Thermal Expansion (CTE), said support assembly including a front support ring extending around an axis;
a fuel air mixer mounted to a first axial side of the support assembly; and
a non-metallic combustor can having a second Coefficient Thermal Expansion (CTE) different than said first Coefficient Thermal Expansion (CTE), said combustor can mounted to an opposite, second axial side of said support assembly, said front support ring being fastened with a multitude of fasteners, which engage said front support ring and said combustor can, to an inner diameter of said non-metallic combustor can at an inclined contact interface defined by said front support ring and said non-metallic combustor can.

### Claim at position 2

-24. (canceled)

### Claim 25 (depends on 1)

The combustor section as recited in claim 1, wherein said inclined contact interface permits said support assembly to slide relative said non-metallic combustor can.

### Claim 26 (depends on 1)

The combustor section as recited in claim 1, wherein said front support ring defines a relatively thin wall thickness at said contact interface.

### Claim 27 (depends on 1)

The combustor section as recited in claim 1, wherein said contact interface has a certain degree of compliant contact between said front support ring and said inner diameter of said non-metallic combustor can.

### Claim 28 (depends on 1)

The combustor section as recited in claim 1, wherein said front support ring defines a relatively thin wall thickness at said contact interface to provide a certain degree of compliant contact between said front support ring and said inner diameter of said non-metallic combustor can.

### Claim 29 (depends on 1)

The combustor section as recited in claim 1, wherein said combustor can is a cylindrical member.

### Claim 30 (depends on 1)

The combustor section as recited in claim 1, wherein said inclined contact interface inclines toward a center of said non-metallic combustor can.

### Claim 31 (depends on 1)

The combustor section as recited in claim 1, wherein said inclined contact interface is annular and inclines toward a center of said non-metallic combustor can.

### Claim at position 10

-34. (canceled)

### Claim 35 (depends on 1)

The combustor section as recited in claim 1, wherein said front support ring includes a multitude of axially elongated fastener openings through which, respectively, said multitude of fasteners extend.

### Claim 36 (depends on 1)

The combustor section as recited in claim 1, further comprising a multitude of slots circumferentially spaced around said front support ring.

### Claim 37 (depends on 1)

The combustor section as recited in claim 1, wherein said front support ring extends radially outwardly from a remaining portion of said support assembly and said non-metallic combustor can extends radially inwardly from a remaining portion of said non-metallic combustor can at said inclined contact interface.

### Claim at position 14

-40. (canceled)

### Claim 41 (depends on 1)

The combustor section as recited in claim 1, wherein said inclined contact interface is a continuous annulus.

### Claim 42 (depends on 1)

The combustor section as recited in claim 1, wherein said fuel air mixer includes a cylindrical connector portion.

### Claim 43 (depends on 42)

The combustor section as recited in claim 42, wherein said connector portion mates with a corresponding cylindrical portion extending from said front support ring.