Unlock instant, AI-driven research and patent intelligence for your innovation.

Air shield for a fuel injector of a combustor

Inactive Publication Date: 2016-09-15
GENERAL ELECTRIC CO
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes an air shield for an injector of a combustor in a gas turbine. The air shield has a similar design to a bellows and is used to distribute air to the injector. The air shield has two inlets that receive air from the surrounding area to form the channel airflow. This design helps to improve the air distribution and combustion efficiency of the gas turbine.

Problems solved by technology

However, if the supply of air includes low velocity or recirculation zones, unintended flameholding at the late lean injector may result.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Air shield for a fuel injector of a combustor
  • Air shield for a fuel injector of a combustor
  • Air shield for a fuel injector of a combustor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013]The exemplary systems and methods described herein overcome at least some of the disadvantages associated with known late lean injectors for combustors of rotary machines. The embodiments described herein include an air shield configured to cover a late lean injector. The air shield defines a channel that provides an airflow to the late lean injector. The airflow enters the channel through at least one first inlet defined in a side wall of the air shield, and through at least one second inlet defined in a top wall of the air shield. The first and second inlets cooperate to reduce low velocity and / or recirculation zones and improve flow uniformity through the late lean injector. Moreover, the air shield may enclose at least a portion of a fuel supply line to the late lean injector.

[0014]Unless otherwise indicated, the terms “first,”“second,” etc. are used herein merely as labels, and are not intended to impose ordinal, positional, or hierarchical requirements on the items to wh...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An air shield for an injector of a combustor includes a first section that extends axially from a first end to a second end. The first section includes at least one side wall and a top wall. The at least one side wall and the top wall at least partially define a channel configured to distribute a channel airflow to the injector. The air shield also includes at least one first inlet defined through the at least one side wall and at least one second inlet defined through the top wall. The at least one first inlet and the at least one second inlet are configured to receive a portion of a surrounding airflow to at least partially form the channel airflow.

Description

BACKGROUND[0001]The field of the disclosure relates generally to a fuel injector for a combustor of a rotary machine, and more particularly to an air shield to control air flow to a fuel injector.[0002]At least some known combustors used with rotary machines, such as gas turbines, include at least one secondary fuel injector, often referred to as a “late lean injector,” located downstream from a primary fuel nozzle. At least some known late lean injectors mix a fuel supply with a supply of air, such as from a compressor discharge casing. However, if the supply of air includes low velocity or recirculation zones, unintended flameholding at the late lean injector may result.BRIEF DESCRIPTION[0003]In one aspect, an air shield for an injector of a combustor is provided. The air shield includes a first section that extends axially from a first end to a second end. The first section includes at least one side wall and a top wall. The at least one side wall and the top wall at least partia...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F23R3/34F23R3/26
CPCF23R3/26F23R3/346F23R3/34F23R3/002
Inventor BHAGAT, REENACAI, JUN
Owner GENERAL ELECTRIC CO