System and method for suppressing combustion instability in a turbomachine

A technology of instability and turbines, applied in combustion methods, combustion chambers, combustion equipment, etc., can solve problems such as complex control mechanisms and low efficiency

Inactive Publication Date: 2010-09-01
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

While both approaches above are effective in suppressing combustion instabilities, avoiding various operating conditions limits the overall operating range of the turbine, while manipulating the fuel-air ratio requires complex control mechanisms and can lead to inefficient combustion

Method used

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  • System and method for suppressing combustion instability in a turbomachine
  • System and method for suppressing combustion instability in a turbomachine
  • System and method for suppressing combustion instability in a turbomachine

Examples

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Embodiment Construction

[0106] First refer to figure 1 , a turbine constructed in accordance with an exemplary embodiment of the present invention is designated generally at 2 . The turbine 2 includes a compressor 4 and a combustor assembly 5 having a plurality of combustors, one of which is designated 6 . In the exemplary embodiment shown, the combustor 6 is equipped with a fuel nozzle or injector assembly housing 8 . The turbine 2 also includes a turbine 10 and a common compressor / turbine shaft 12 . In one embodiment, turbine 2 is a PG93719 FBA heavy duty gas turbine engine commercially available from General Electric Company of Greenville, South Carolina. Note that the present invention is not limited to any one particular engine and may be used in conjunction with other gas turbine engines.

[0107] like figure 2 As best shown in , combustor 6 is coupled in flow communication with compressor 4 and turbine 10 . The compressor 4 includes a diffuser 22 and a compressor discharge chamber 24 cou...

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PUM

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Abstract

The invention relates to a system and a method for suppressing combustion instability in a turbomachine. The system for suppressing combustion instability in a turbomachine (2) includes at least one combustion chamber (48) operatively connected to the turbomachine (2), and at least one pre-mixer (80-85) mounted to the at least one combustion chamber (48). The at least one pre-mixer (80-85) is configured to receive an amount of fuel and an amount of air that is combined and discharged into the at least one combustion chamber (48). In addition, the turbomachine (2) includes a combustion instability suppression system (90) operatively associated with the at least one pre-mixer (80-85). The combustion instability suppression system (90) is configured to create a combustion asymmetry. The combustion asymmetry facilitates combustion instability suppression in the turbomachine (2).

Description

technical field [0001] The subject matter disclosed herein relates to the field of turbomachines, and more particularly, to a system and method for suppressing combustion instabilities / dynamics in a turbomachine. Background technique [0002] Combustion instability / dynamics is a phenomenon in turbines utilizing lean premixed combustion. Combustion instability can be low frequency / high frequency depending on the excitation characteristics of the combustion chamber mode. The low frequency combustion dynamic field is caused by the excitation of the axial modes, while the high frequency dynamic field is usually caused by the swirling flame exciting the radial and azimuthal modes of the combustion chamber and is often referred to as screech. The resulting dynamic field includes a combustion field component and an acoustic component transmitted along the combustor during combustion. Under certain operating conditions, the combustion and acoustic components combine to create high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/18F23R3/28
CPCF23R2900/00014F23R3/10
Inventor K·K·辛赫F·韩K·R·麦芒努斯S·斯里尼瓦桑金冠佑
Owner GENERAL ELECTRIC CO
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