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Methods and systems for analysis of combustion dynamics in the time domain

A technology of dynamic analysis and burner, which is applied in the direction of combustion method, control of the thermal working condition of the combustion chamber, combustion chamber, etc., and can solve problems such as inability to deal with nonlinearity, inability to calculate amplitude, etc.

Inactive Publication Date: 2008-04-16
GENERAL ELECTRIC CO
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  • Abstract
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Problems solved by technology

Likewise, current tools for combustion dynamics analysis cannot handle the nonlinearities that occur in high-magnitude dynamics and cannot calculate magnitude

Method used

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  • Methods and systems for analysis of combustion dynamics in the time domain
  • Methods and systems for analysis of combustion dynamics in the time domain
  • Methods and systems for analysis of combustion dynamics in the time domain

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Embodiment Construction

[0010] Although the methods and systems are described herein in the context of gas turbine engines used in industrial settings, it is contemplated that the methods and systems described herein are effective in other combustion turbine systems, including, but not limited to, turbines installed in aircraft. Furthermore, the principles and teachings presented herein are applicable to gas turbine engines using different combustible fuels such as, but not limited to, natural gas, liquefied natural gas (LNG), gasoline, kerosene, diesel fuel, jet fuel, and mixtures thereof. Accordingly, the following descriptions are presented by way of illustration only, not limitation.

[0011] Various embodiments of the present invention use a time-domain approach that includes an approach to the fundamental physics of waves, along with the nonlinear energy losses associated with highly oscillatory flow through channels with fluid flow resistance. Including the thermoacoustics associated with the ...

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Abstract

Methods and systems for analyzing combustion dynamics of a combustor system in the time domain are provided. The combustor system includes an inlet pipe coupled in flow communication with a combustion chamber. The method includes determining a characteristic equation of a wave traveling in the inlet pipe, determining an acoustic pressure oscillation in the combustion chamber, and determining a pressure fluctuation in the inlet pipe using the characteristic equation and the determined acoustic pressure oscillation.

Description

technical field [0001] The present invention relates generally to combustion dynamics analysis, and more particularly to methods and systems for time domain analysis of combustion dynamics. Background technique [0002] Currently, combustion dynamics analysis is performed by a variety of methods including 1D combustion geometry modal analysis and 3D transient computational fluid dynamics of chemical reactions using large eddy simulations. To date, there are no known tools for calculating the magnitude of combustion dynamics, and current tools for combustion dynamics analysis have several significant problems, such as being only one-dimensional. Recent experimental evidence shows true thermoacoustic three-dimensionality even at low frequencies, violating one of the fundamental assumptions of the tool. Likewise, current tools for combustion dynamics analysis cannot handle the nonlinearities that occur in high-magnitude dynamics and cannot calculate magnitudes. Contents of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00F23R3/38G01M99/00
CPCF05B2270/15F23N2041/20F05D2270/301F05B2270/301F01D17/08F23R2900/00013F02C9/00F05D2270/14F23N5/16G01M15/14F23N2241/20F02C7/00
Inventor J·J·林奇J·C·因泰尔K·麦马汉M·W·平森T·罗姆
Owner GENERAL ELECTRIC CO
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