METHOD AND SYSTEM FOR A GAS TURBINE ENGINE AIR VENTILATION PURGE CIRCUIT

摘要

A method and fuel supply system for supply of a combustion chamber with at least one combustible fluid are provided. The fuel supply system includes a combustion chamber, at least one supply circuit, and at least one purge circuit, the purge circuit coupled to the at least one supply circuit, the purge circuit including at least two isolation valves defining a cavity between, a source of relatively high temperature purge air coupled in flow communication to the cavity through one of the at least two isolation valves, a source of relatively low temperature ventilation air coupled in flow communication to the cavity, and a vent coupled in flow communication to the cavity, the at least one purge circuit configured to channel a flow of relatively low temperature ventilation air from the source relatively low temperature ventilation air through the cavity to the vent during operation of the combustion chamber.

主权项

1. A fuel supply system for supply of a combustion chamber with at least one combustible fluid, said fuel supply system comprising:
a combustion chamber comprising a fuel injector; at least one supply circuit configured to supply said combustion chamber with a combustible fluid; and at least one purge circuit coupled in flow communication with said at least one supply circuit, said purge circuit comprising:
at least two isolation valves defining a cavity between said at least two isolation valves;a source of relatively high temperature purge air coupled in flow communication to said cavity through one of said at least two isolation valves;a source of relatively low temperature ventilation air coupled in flow communication to said cavity; anda vent coupled in flow communication to said cavity, said at least one purge circuit configured to channel a flow of relatively low temperature ventilation air from said source relatively low temperature ventilation air through said cavity to said vent during operation of said combustion chamber.