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Resonating swirler

A swirler, resonant frequency technology, applied in the field of gas turbine engines, can solve problems such as not being very effective

Inactive Publication Date: 2010-11-24
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However these known resonant devices are not very effective in completely absorbing high frequencies

Method used

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  • Resonating swirler
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Experimental program
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Effect test

Embodiment Construction

[0048] Referring now to the drawings, in which like numerals represent like elements throughout the several figures, figure 1 A schematic view of gas turbine engine 10 is shown. The gas turbine engine 10 may include a compressor 20 for compressing a flow of incoming air, as is known. Compressor 20 delivers a stream of compressed air to combustor 30 . Combustor 30 mixes the stream of compressed air with the stream of compressed fuel and ignites the mixture. (Although only a single combustor 30 is shown, the gas turbine engine 10 may include any number of combustors 30 .) The hot combustion gases are in turn delivered to a turbine 40 . The hot combustion gases drive turbine 40 to produce mechanical work. The mechanical work produced in turbine 40 drives compressor 20 and an external load 50 such as a generator. Gas turbine engine 10 may use natural gas, various types of syngas, and other types of fuels. The gas turbine engine 10 may have other configurations and use other t...

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Abstract

The present application provides a swirler (100) for a turbine combustor (30). The swirler (100) may include an outer wall (105), a passage (110) defined by the outer wall (105), and an end wall (115). The end wall (115) may include a number of apertures (120) therethrough.

Description

technical field [0001] The present application relates generally to gas turbine engines and, more particularly, to swirlers for combustors that act as resonators to absorb high frequency pressure waves. Background technique [0002] Current designs of dry low NOx (DLN) gas turbines typically operate with fuel-lean air mixtures. The fuel-lean air mixture includes the right amount of fuel premixed with a large excess of air, which is combusted in the combustion chamber. Although this lean mixture reduces the amount of NOx emissions, it can lead to low and high frequency combustion instabilities. High frequency combustion instability may be referred to as a screech. These instabilities can be caused by firing rate fluctuations coupled with fuel air flow fluctuations and burner acoustics. This combination can lead to low frequency combustion instabilities and very high amplitudes of squeal within the combustor. Even small amplitudes of screeching within the burner can rapidl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D14/70
CPCF23R3/14F23R2900/00014
Inventor P·B·贾因S·斯里尼瓦桑D·沙马
Owner GENERAL ELECTRIC CO