METHODS AND SYSTEMS FOR OPERATING GAS TURBINE ENGINES

摘要

Methods and systems for operating a gas turbine engine including a fuel delivery system and a plurality of combustor assemblies are provided. The fuel delivery system comprises a primary fuel circuit configured to continuously supply fuel to each of the plurality of combustor assemblies during a first mode of operation and a second mode of operation. At least one secondary fuel circuit of the fuel delivery system is configured to supply fuel to each of the plurality of combustor assemblies during the second mode of operation. The secondary fuel circuit includes at least one isolation valve coupled in flow communication with each of the plurality of combustor assemblies. The at least one isolation valve facilitates preventing fluid flow upstream into the secondary fuel circuit during the first mode of operation. The fuel delivery system, using the isolation valve, replaces a purging system in the gas turbine engine.

主权项

1. A fuel delivery system for a gas turbine engine including a plurality of combustor assemblies, said fuel delivery system comprising:
a primary fuel circuit configured to continuously supply fuel to each of the plurality of combustor assemblies during a first mode of operation and a second mode of operation; and at least one secondary fuel circuit configured to supply fuel to each of the plurality of combustor assemblies during the second mode of operation, said secondary fuel circuit comprising at least one isolation valve coupled in flow communication with each of the plurality of combustor assemblies, said at least one isolation valve facilitates preventing fluid flow upstream into said secondary fuel circuit during said first mode of operation, wherein the gas turbine engine does not include a purging system.