PILOT NOZZLES IN GAS TURBINE COMBUSTORS
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United States of America Patent
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Issued Date -
Aug 31, 2017
app pub date -
Feb 26, 2016
filing date -
Feb 26, 2016
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Abstract
A fuel nozzle for a gas turbine engine that includes: an elongated centerbody; an elongated peripheral wall formed about the centerbody so to define a primary flow annulus; a primary fuel and air supply in fluid communication with the primary flow annulus; and a pilot nozzle. The pilot nozzle, formed in the centerbody, may have axially elongated air and mixing tubes extending between inlets and outlets defined, respectively, through upstream and downstream faces of the pilot nozzle. A secondary air supply may be communicate with the inlets of the air and mixing tubes. A fuel port may be positioned in the mixing tubes for connecting each to a secondary fuel supply. An uninterrupted sidewall sealing structure in each of the air tubes may segregate an air flow therethrough from the secondary fuel supply. The air and mixing tubes may be configured as canted tubes so to induce a downstream swirling flow.
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