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Premixing pre-vortex plasma assistant lighter

A technology of plasma and igniter, applied in the direction of burner, burner, burner ignition device, etc.

Inactive Publication Date: 2009-07-01
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Known techniques for addressing some of the aforementioned challenges include: 1) Gas turbine downsizing by fuel staging in several nozzles within the combustor barrel, but this produces undesirably high CO emissions, 2) staged combustion, and 3) transition to partially premixed or non-premixed combustion, which also produces undesirably high NOx emissions

Method used

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  • Premixing pre-vortex plasma assistant lighter
  • Premixing pre-vortex plasma assistant lighter
  • Premixing pre-vortex plasma assistant lighter

Examples

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Embodiment Construction

[0058] Here, the embodiments described hereinafter with reference to the drawings are directed to a pilot burner comprising means for swirling air and fuel or a fuel / air mixture to provide pre-mixing pre-swirling plasma assist ( Enhanced) a pilot flame suitable for use with a gas turbine combustor. According to one embodiment, the pilot burner is located in the center body of a premixed fuel / air nozzle of a gas turbine combustor and operates to improve the lean limit of blowout (LBO) of the combustor. Pilots may also, but are not limited to, operate as a source of ignition and / or as a means of reducing combustion instabilities.

[0059] look now figure 1 , a side cross-sectional view diagrammatically shows a premixed prevortex plasma assisted pilot burner 10 in accordance with one aspect of the present invention. The pilot burner 10 includes a swirler arrangement 20 to induce swirling of the air and fuel or fuel / air mixture entering the pilot burner 10 through one or more in...

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Abstract

A plasma enhanced pilot including a swirler mechanism is configured to be inserted into an existing blank (purge air) or liquid fuel (dual fuel) cartridge space within the centerbody of a lean, premixed land-based gas turbine combustor fuel nozzle.

Description

technical field [0001] The present invention relates generally to gas turbine combustors, and more particularly to electrical discharge devices for improving lean blow-out limits and reducing combustion instabilities of gas turbine combustors. Background technique [0002] Fully premixed lean combustion is the key to enabling low nitrogen oxide (NOx) emissions at high firing rates. It is also known as Dry Low NOx (DLN) combustion because it achieves low NOx emissions without adding steam or water to keep peak combustion temperatures low. One of the problems that arises in lean premixed combustion is that thermo-acoustic instabilities, or combustion dynamics, can occur which, if unchecked, can cause pressure fluctuations large enough that Damage to gas turbine hardware. Plasma-assisted combustion is a technique that is seen as a potential for influencing or controlling the combustion process (effective reaction rate and / or combustion stability) so as to be able to counterac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/58
CPCF23R2900/00009F23D2207/00F23R3/286F23R2900/03343F23R3/343
Inventor J·T·赫邦G·A·贝内特A·J·迪恩M·S·伊德尔奇克S·G·萨杜希A·杨西
Owner GENERAL ELECTRIC CO
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