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Coanda injection system for axially staged low emission combustors

United States Patent

8,176,739
May 15, 2012
View the Complete Patent at the US Patent & Trademark Office
The low emission combustor includes a combustor housing defining a combustion chamber having a plurality of combustion zones. A liner sleeve is disposed in the combustion housing with a gap formed between the liner sleeve and the combustor housing. A secondary nozzle is disposed along a centerline of the combustion chamber and configured to inject a first fluid comprising air, at least one diluent, fuel, or combinations thereof to a downstream side of a first combustion zone among the plurality of combustion zones. A plurality of primary fuel nozzles is disposed proximate to an upstream side of the combustion chamber and located around the secondary nozzle and configured to inject a second fluid comprising air and fuel to an upstream side of the first combustion zone. The combustor also includes a plurality of tertiary coanda nozzles. Each tertiary coanda nozzle is coupled to a respective dilution hole. The tertiary coanda nozzles are configured to inject a third fluid comprising air, at least one other diluent, fuel, or combinations thereof to one or more remaining combustion zones among the plurality of combustion zones.
Evulet; Andrei Tristan (Clifton Park, NY), Varatharajan; Balachandar (Cincinnati, OH), Kraemer; Gilbert Otto (Greer, SC), ElKady; Ahmed Mostafa (Niskayuna, NY), Lacy; Benjamin Paul (Greer, SC)
General Electric Company (Niskayuna, NY)
12/ 175,050
July 17, 2008
STATEMENT OF FEDERALLY FUNDED RESEARCH This invention was made with Government support under grant number E.I. #C391520602379936A10 awarded by the Department of Energy under DOE Cooperative Agreement DE-FC26-05NT42643. The Government has certain rights in the invention.