Automotive gas turbine engine.

摘要

A combustor assembly in an automotive gas turbine engine includes a continuously ignited, pilot flame tube assembly (65) supported on a combustor dome (44) immediately downstream of a prevaporization prechamber (32) with a fuel and air swirler (30). The pilot flame tube assembly (65) has an air swirler and fuel nozzle supported on an interior bulkhead and is associated with a fuel system (100) that maintains a shielded pilot flame (95) to prevent flameout of flammable air fuel mixtures in a main reaction chamber (46) of the combustor (10); the fuel system supplies greater fuel to the pilot flame tube assembly (65) at engine fuel start and stop to produce an extended flame plume (106) that extends into the reaction chamber (46) to burn residuum of fuel when the air fuel ratio in the main reaction chamber mixture is below the flammability limit of the fuel.