# US 2009/0260366 A1 · Flame holder for an afterburner duct of a jet engine with a spacer shoe, afterburner duct, and jet engine comprising an afterburner duct

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- Number: US 2009/0260366 A1
- Document ID: US20090260366A1
- Status: Published application
- Kind: A1
- Application number: 12/394,570
- Filed: 2009-02-27
- Published: 2009-10-22
- Earliest claimed: 2008-02-29
- Assignees: Snecma
- Inventors: Jacques Marcel Arthur BUNEL; Yann Francois Jean-Claude Vuillemenot
- Web page: https://patentgrep.com/patent/US20090260366A1

## CPC

- F23R 3/20: incorporating fuel injection means
- 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)

## Abstract

The invention relates to a flame holder (10) for an afterburner duct of a jet engine, comprising an arm (100) in the form of a gutter forming a cavity, a shield (110) for protecting the cavity of the arm (100) from heat, and an air supply baffle (120) housed in the cavity. The arm (100), the protective shield (110) and the air supply baffle (120) are held together by a one-piece spacer shoe (150).

## Claims

### Claim 1

A flame holder for an afterburner duct of a jet engine, comprising an arm in the form of a gutter forming a cavity, a shield for protecting the cavity of the arm from heat, and an air supply baffle housed in the cavity, wherein the arm, the protective shield and the air supply baffle are held together by a one-piece spacer shoe comprising at least one spacer lug designed to form a gap between the protective heat shield and at least one wall of the arm.

### Claim 2 (depends on 1)

The flame holder as claimed in claim 1, wherein the shoe comprises a means for retaining the baffle.

### Claim 3 (depends on 1)

The flame holder as claimed in claim 1, wherein a fuel injector is placed inside said cavity of the arm.

### Claim 4 (depends on 3)

The flame holder as claimed in claim 3, wherein the shoe comprises a means for centering the injector.

### Claim 5 (depends on 4)

The flame holder as claimed in claim 4, wherein the shoe comprises a means for retaining the baffle.

### Claim 6 (depends on 1)

The flame holder as claimed in claim 1, wherein the shoe is welded to the air supply baffle.

### Claim 7 (depends on 1)

The flame holder as claimed in claim 1, wherein the shoe takes the form of a Y defining a central branch and two lateral branches, the central branch comprising a through orifice for retaining the baffle.

### Claim 8 (depends on 7)

The flame holder as claimed in claim 7, wherein a fuel injection is placed inside said cavity of the arm, the central branch comprising a through orifice for centering the injector.

### Claim 9 (depends on 1)

A jet engine afterburner duct comprising at least one flame holder as claimed in claim 1.

### Claim 10 (depends on 9)

A jet engine comprising an afterburner duct as claimed in claim 9.