Patent ID: 11885497
Assignee: PRATT & WHITNEY CANADA CORP.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 12:
13. A gas turbine engine comprising:
a combustion chamber; a fuel nozzle having a tip for outputting a flow of fuel in the combustion chamber via a nozzle outlet;
a collar extending around the fuel nozzle about a central axis of the fuel nozzle, the fuel nozzle secured to a liner of the combustion chamber via the collar;
a slot radially between a first wall defined by the collar and a second peripheral wall defined by the fuel nozzle, the first wall and the second peripheral wall extending from an open end of the slot to a closed end of the slot, a slot outlet of the slot in fluid flow communication with the combustion chamber independently of the fuel nozzle, the slot outlet distinct from the nozzle outlet;
one or more gas passages extending through the first wall, each gas passage having an outlet into the slot, the outlet of each of the one or more gas passages defining an exit flow axis directed against and intersecting the second wall and spaced away from the closed end; and
a third wall extending radially away from the central axis around the slot outlet, the third wall connecting the first wall at the slot outlet, the slot outlet at an axial position relative to the central axis, the third wall extending normally to the central axis at the axial position, the nozzle outlet being at the axial position or the fuel nozzle protruding from the axial position into the combustion chamber;
wherein the open end of the slot comprises at least one rounded corner formed at a junction between the first wall and the third wall, the at least one rounded corner operable for directing fluid from the slot outlet along the third wall.