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Fuel nozzle assembly for a gas turbine engine

A technology of fuel nozzles and gas turbines, which is applied to engine components, turbine/propulsion fuel delivery systems, machines/engines, etc., and can solve problems such as low cycle, high cycle fatigue, and fuel hole structure rupture

Active Publication Date: 2011-01-12
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, in known fuel nozzle assemblies, the operating frequency of the gas turbine engine may be between fuel nozzle components and joints (such as, for example, flanges, premixing tubes and / or swirlers and / or joints defined between components) Moderate to low cycle and / or high cycle fatigue
Furthermore, in known fuel nozzle assemblies, fuel can be produced if the natural frequency is similar to or substantially the same as the operating rotor frequency (including one to four times the rotor frequency), the gas turbine engine's combustion pitch, and the whistle pitch. Stress concentration around the nozzle assembly and / or structural rupture in the fuel hole due to the fuel nozzle assembly

Method used

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  • Fuel nozzle assembly for a gas turbine engine
  • Fuel nozzle assembly for a gas turbine engine
  • Fuel nozzle assembly for a gas turbine engine

Examples

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Embodiment Construction

[0083] figure 1is a schematic diagram of an exemplary gas turbine engine 100 . In the exemplary embodiment, engine 100 includes compressor 102 and combustor 104 . Combustor 104 includes a combustion zone 105 and a fuel nozzle assembly 106 . Engine 100 also includes turbine 108 and common compressor / turbine shaft 110 (sometimes referred to as rotor 110 ). Compressor 102 is also rotatably coupled to rotor 110 . In the exemplary embodiment, there are multiple combustors 104 and fuel nozzle assemblies 106 . In the following discussion, only one of the components will be discussed unless otherwise indicated. In one embodiment, gas turbine engine 100 is a PG93719FBA heavy-duty gas turbine engine commercially available from General Electric Company of Greenville, Southern California. It is worth noting that the present invention is not limited to any one particular engine, and that the present invention may be used in conjunction with other gas turbine engines, such as, for exam...

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Abstract

A fuel nozzle assembly for a gas turbine engine includes a flange and a pre-mix tube. The flange includes a first end that is configured to couple to an end cover of the combustor, and a second end that is opposite said first end. The pre-mix tube is coupled at a first end to the flange second end. The flange and the pre-mix tube are fabricated to operate at a natural frequency that is different from an operating frequency of the gas turbine engine.

Description

technical field [0001] The field of the invention relates generally to gas turbine engines, and more particularly to center fuel nozzles for use within gas turbine engines. Background technique [0002] At least some known gas turbine engines ignite a fuel-air mixture in a combustor to generate a flow of combustion gases that are sent to a turbine via a hot gas path. Compressed air is delivered by the compressor to the burner. Combustor assemblies typically employ fuel nozzles that facilitate delivery of fuel and air to the combustion zone of the combustor. The turbine converts the thermal energy of the combustion gas flow into mechanical energy that rotates the turbine shaft. The output of the turbine can be used to power machines such as generators or pumps. [0003] Known fuel nozzle assemblies include a flange extending from an end cover that acts as a structural base for the fuel nozzle. A premixer tube extends from the flange and is coupled to the cyclone. The nat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D14/48
CPCF23R3/286F23R3/14F23D2900/00008F23R2900/00018F02C7/22F23R2900/00014F23R3/283F23M99/005F05D2240/128F23R2900/00017F23M20/005
Inventor D·M·拜利S·R·西蒙斯M·B·赫夫曼
Owner GENERAL ELECTRIC CO
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