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

Claim 0:
1. A fuel nozzle assembly comprising:
a fuel nozzle having a tip for outputting a flow of fuel in a combustion chamber via a nozzle outlet, the nozzle outlet open directly to the combustion chamber;
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;
an annular slot radially between a first wall defined by the collar and a second peripheral wall defined by the fuel nozzle relative to the central axis, the first wall and second peripheral wall extending from an open end of the annular slot facing a combustor to a closed end of the annular slot, a slot outlet of the annular slot open directly to the combustion chamber, the slot outlet distinct from the nozzle outlet;
one or more gas passages extending through the first wall, each of the one or more gas passages having an outlet communicating with the annular slot, the outlet of each of the one or more gas passages directed toward the second peripheral wall, the outlet of each of the one or more gas passages located on the first wall spaced away from the closed end, the outlet of each of the one or more gas passages defining an exit flow axis intersecting the second peripheral wall; 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 a connection between the third wall and the first wall has a rounded corner, the rounded corner facing the open end and operable for directing fluid from the slot outlet along the third wall.