Patent ID: 9255711
Filing Date: 2016-02-09
CPC Classification: F02C,F23D,F23R

Claim Text:
1. A system for reducing combustion dynamics, the system comprising: a. first and second combustors arranged about an axis, wherein each combustor comprises a fuel nozzle and a combustion chamber downstream from the fuel nozzle; b. wherein each fuel nozzle comprises an axially extending center body, a shroud that circumferentially surrounds at least a portion of the axially extending center body, a plurality of vanes that extend radially between the center body and the shroud and that are curved to impart swirl to a working fluid flowing between the shroud and the center body; a first fuel port through at least one of the plurality of vanes being located at a first axial distance from a front end of the combustion chamber, a second fuel port through the center body being located at a second axial distance from the front end of the combustion chamber, and the plurality of vanes being located at a third axial distance from the front end of the combustion chamber the second axial distance being shorter than the first axial distance; and c. wherein at least one of the first axial distance, the second axial distance, and the third axial distance of the fuel nozzle in the first combustor is different from at least one corresponding first axial distance, second axial distance, and third axial distance of the fuel nozzle in the second combustor, and wherein the plurality of vanes of one of the fuel nozzles is located at an inlet of a corresponding shroud.