Metering of diluent flow in combustor

摘要

Disclosed is a combustor (10) including a baffle plate (12) having at least one through baffle hole (14) and at least one fuel nozzle (16) extending through the at least one baffle hole (14). A circumferentially adjustable collar (26) is located at the at least one baffle hole (14) between the baffle plate (12) and the at least one fuel nozzle (16). A plurality of openings (46) at the collar (26) are configured to meter a flow of diluent (22) between the baffle hole (14) and the at least one fuel nozzle (16). Further disclosed is a method for providing diluent (22) to a combustor (10) including providing a plurality of openings (46) disposed at a circumferentially adjustable collar (26) between a baffle plate (12) and at least one fuel nozzle (16) extending through a through hole in the baffle plate (12). The diluent (22) is flowed through the plurality of openings (46) toward at least one flow channel (56) in the at least one fuel nozzle (16).