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Dual soft passage nozzle

A channel and fuel nozzle technology, applied in the field of dual-soft channel nozzles, can solve problems such as high-amplitude pressure fluctuations

Inactive Publication Date: 2012-05-02
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This feedback loop can have the potential to produce high amplitude pressure fluctuations

Method used

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Embodiment Construction

[0035] Referring now to the drawings, wherein like reference numerals represent like elements throughout the several views, figure 1 A schematic diagram of a gas turbine engine 5 that may be as described herein is shown. Gas turbine engine 5 may include a compressor 10 . Compressor 10 compresses an incoming air stream 15 . Compressor 10 delivers compressed air stream 15 to combustor 20 . Combustor 20 mixes compressed air flow 15 with compressed fuel flow 25 and ignites the mixture to form combustion gas flow 30 . Although only a single combustor 20 is shown, the gas turbine engine 5 may include any number of combustors 20 . The combustion gas flow 30 is in turn sent to a turbine 35 . Combustion gas flow 30 drives turbine 35 to generate mechanical work. The mechanical work produced in turbine 35 drives compressor 10 and an external load 40 (eg, generator, etc.).

[0036] Gas turbine engine 5 may use natural gas, various types of syngas, and other types of fuels. Gas turb...

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Abstract

The present application provides a fuel nozzle system (100). The fuel nozzle system may include a pre-orifice (80) for a first pressure drop, a captured response volume (95) in communication with the pre-orifice, a post-orifice (90) in communication with the captured response volume (95) for a second pressure drop, and a secondary fuel passage (120) downstream of the post-orifice for a third pressure drop. The second pressure drop is less than the first pressure drop and the third pressure drop is less than the second pressure drop.

Description

technical field [0001] The present application relates generally to gas turbine engines, and more particularly to dual soft passage nozzles for low combustion dynamics in premixed, low emission gas turbines and the like. Background technique [0002] Premixing of fuel and air can lead to unstable combustion when compared to conventional non-premixed combustion systems. In an enclosed environment such as a gas turbine combustor, the substantially non-steady state heat released from premixed combustion can couple with the natural sound modes of the enclosure or combustor. Combustion may respond to pressure changes, which may set an acoustic feedback loop within it. This feedback loop can have the potential to generate high amplitude pressure fluctuations. These pressure fluctuations are known as combustion dynamics or combustion instabilities, which can be catastrophic to the combustor and the entire gas turbine engine. [0003] With the widespread use of premixed, low-emis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D14/48
CPCF23R3/286F23R3/14F02C9/50F02C7/232F05D2240/128
Inventor K·K·辛赫韩飞S·斯里尼瓦桑金冠佑
Owner GENERAL ELECTRIC CO