Patent ID: 9534789
Date: 2017-01-03
CPC Classifications: F23M,F23R

Claim:
1. A method comprising: increasing the pressure of a working fluid within a compressor of a gas turbine engine; communicating the working fluid from the compressor toward a combustion chamber via an annular passage that surrounds the combustion chamber; introducing a fuel into the working fluid after said increasing to define a fuel and working fluid mixture; separating the fuel and working fluid mixture into at least two distinct and separate fuel and working fluid mixture streams; and delivering one of the at least two distinct and separate fuel and working fluid mixture streams to a first location within the combustion chamber and an other of the at least two distinct and separate fuel and working fluid mixture streams to a second location within the combustion chamber via an annular shaped branch duct disposed radially inward of the annular passage and radially outward of the combustion chamber with respect to a centerline of the combustion chamber, wherein the time to deliver the fuel and working fluid mixture stream to the first location is different than the time to deliver the fuel and working fluid mixture stream to the second location, and wherein the difference in time to deliver the fuel and working fluid mixture streams to the combustion chamber is selected to maximize attenuation of combustor pulsations within the combustion chamber.