Patent ID: 8176739
Filing Date: 2012-05-15
Classification: F23R

Abstract:
1. A low emission combustor, comprising: a combustor housing defining a combustion chamber comprising a plurality of combustion zones; a liner sleeve disposed in the combustor housing with a gap formed between the liner sleeve and the combustor housing; a liner disposed within the liner sleeve; wherein the liner comprises a plurality of dilution holes; a secondary nozzle disposed along a center line of the combustion chamber and configured to inject a first fluid comprising air, 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 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; and a plurality of coanda tertiary nozzles, each coanda tertiary nozzle coupled to a respective dilution hole, wherein the coanda tertiary nozzles are configured to inject a third fluid comprising air, fuel, or combinations thereof to one or more remaining combustion zones among the plurality of combustion zones, wherein the one or more remaining combustion zones are located to a downstream side of the first combustion zone, wherein each of the tertiary coanda nozzles comprises a predetermined profile disposed proximate to a fuel plenum, wherein the profile is configured to facilitate attachment of a fuel introduced via the fuel plenum to the profile to form a fuel boundary layer and to entrain incoming air from an air inlet to promote premixing of air and fuel.