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System and method for reducing modal coupling of combustion dynamics

A modal coupling and dynamic technology, applied in the direction of combustion method, turbine/propellant fuel delivery system, combustion chamber, etc., can solve the problems that limit the function and operability of the combustor

Inactive Publication Date: 2014-05-28
GENERAL ELECTRIC CO
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  • Abstract
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Problems solved by technology

However, combustor tuning to protect turbine blades can severely limit combustor functionality and operability

Method used

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  • System and method for reducing modal coupling of combustion dynamics
  • System and method for reducing modal coupling of combustion dynamics
  • System and method for reducing modal coupling of combustion dynamics

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Embodiment Construction

[0019] Reference will now be made in detail to various embodiments of the invention, one or more examples of which are illustrated in the drawings. The detailed description uses numerical and letter designations to refer to features in the drawings. The same or similar symbols in the drawings and descriptions are used to refer to the same or similar parts in the present invention. The terms "first", "second" and "third" used in this specification can be used interchangeably to distinguish various components, and are not intended to indicate the position or importance of each component. The terms "upstream", "downstream", "radial" and "axial" refer to relative directions with respect to fluid flow in a fluid channel. For example, "upstream" refers to where the fluid flow is coming from, while "downstream" refers to the direction the fluid flow is going. Similarly, "radial" refers to relative directions generally perpendicular to the direction of fluid flow, and "axial" refers...

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Abstract

The present invention provides a system and a method for reducing modal coupling of combustion dynamics. The system includes a plurality of combustors, and at least one fuel injector in each of the plurality of combustors. The system also includes structure for dithering a combustion instability frequency in at least one combustor in the plurality of combustors. A method for reducing modal coupling of combustion dynamics includes flowing a compressed working fluid at a temperature to a plurality of combustors and flowing a fuel to at least one fuel injector in each of the plurality of combustors. The method further includes dithering at least one of the temperature of the compressed working fluid flowing to the plurality of combustors or the fuel flow to the at least one fuel injector in at least one combustor in the plurality of combustors.

Description

technical field [0001] The present invention generally relates to a system and method for reducing modal coupling of combustion dynamics. In certain embodiments, the systems and methods may be incorporated into gas turbines and other turbomachines. Background technique [0002] Burners are commonly used in industrial production and commercial operations to ignite fuel to generate high temperature and high pressure combustion gases. For example, gas turbines and other turbines often include one or more combustors to generate electricity or thrust. A typical gas turbine used to generate electricity consists of an axial compressor at the front, multiple combustors near the middle, and a turbine at the rear. Ambient air enters the compressor as the working fluid, and the compressor injects kinetic energy into the working fluid in a progressive manner, resulting in a compressed working fluid in a high-energy state. The compressed working fluid then exits the compressor and flo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/16
CPCF02C9/28F23R3/28
Inventor S.L.克罗瑟斯W.S.齐明斯基C.X.斯蒂芬森
Owner GENERAL ELECTRIC CO
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