Methods and systems for cooling gas turbine engine combustors

摘要

A combustor for a gas turbine includes a dome assembly that facilitates extending a useful life of the combustor in a cost-effective and reliable manner. The dome assembly includes a dome plate and a heat shield coupled to the dome plate. The dome plate includes an impingement baffle and an opening extending therethrough and sized to receive a fuel injector. The impingement baffle also includes a plurality of cooling openings in flow communication with the heat shield that direct cooling airflow for impingement cooling and film cooling of the heat shield.