Patent ID: 7721548

Claim:
A heat shield for a combustor dome, the heat shield comprising a body defining a fuel nozzle hole, a back face adapted to be mounted adjacent and spaced-apart from a combustor dome, a first ridge extending around the nozzle opening and extending from the back face to a height adapted to substantially contact the combustor dome, the first ridge thereby defining a cooling compartment interior of the first ridge between the body and the combustor dome, a plurality of slots provided through the first ridge, the slots adapted to be closed by the combustor dome to provide cooling holes when heat shield is mounted on the combustor, the cooling holes adapted to direct pressurized cooling air within the compartment therethrough to cool an adjacent region of the body exterior of the compartment, wherein first and second arrays of pin fins are provided on the back face outwardly of the compartment on opposed sides of said plurality of slots, the plurality of slots being aligned with a pin fin free region.