Patent ID: 9625152
Date: 2017-04-18
CPC Classifications: F02C,F23R

Claim:
1. A heat shield for a combustor of a gas turbine engine, comprising a heat shield body adapted to be mounted to a combustor wall with a back face of the heat shield body in spaced-apart facing relationship with an inner surface of the combustor wall to define an air gap between the heat shield body and the combustor wall, rails extending from the back face of the heat shield body, and grooves defined in at least one of said rails, the grooves being in fluid flow communication with the air gap when the heat shield body is mounted to the combustor wall, wherein the rails include radially inner and radially outer rails extending between opposed side edges of the heat shield body and wherein at least two fuel nozzle openings are defined in the heat shield body between the inner and outer rails, wherein the rails further comprise a pair of mid rails projecting from the back face of the heat shield body, the mid rails extending radially between the radially inner and the radially outer rails and disposed between the at least two fuel nozzle openings, the mid rails and the inner and outer rails defining a mid-region passage, said mid-region passage having coolant air outlet openings defined in the inner and outer rails.