COMBUSTOR DOME HEAT SHIELD

摘要

A combustor heat shield has lips with fins distributed on the lips. The lip-fins have an extended end portion projecting rearwardly from the back face of the heat shield. Impingement jets may be directed against the rearwardly extended end portions of the lip-fins to enhance cooling. The heat shield may define a fuel nozzle opening surrounded by a rail on the back side of the heat shield. Impingement holes or slots may be defined in the rail for allowing cooling air passing therethrough to impinge upon the lip-fins.

主权项

1. A heat shield for a combustor of a gas turbine engine, comprising a heat shield panel adapted to be mounted to an inside of a dome of the combustor with a back face of the heat shield panel in spaced-apart facing relationship with an inner surface of the dome, the heat shield configured to receive a flow of cooling air along said back face, at least one radially inner or outer lip along a periphery and projecting downstream of the heat shield panel relative to the flow of cooling air, an array of lip-fins provided on the at least one of the radially inner or outer lip, the lip-fins having extended end portions projecting upstream from the back face of the heat shield panel.