Rtx Corporation

Alessio Pulliero

Gary M McBrien

A method for detecting performance degradation of an AC Nozzle in a gas turbine engine including operating the gas turbine engine under a normal operating condition, maintaining the fuel flow rate at a constant fuel flow rate, determining a delta pressure Pacross an N number of Proportional Metering Valves (PMVs) as the gas turbine engine is operating under the normal operating condition, selecting a PMV and an AC Nozzle, controlling the PMV to modify a fuel flow rate to the selected AC Nozzle to cause the gas turbine engine to operate under a modified fuel flow condition, determining a delta pressure Pacross the N number of PMVs as the gas turbine engine is operating under the modified operating condition and comparing the delta pressure Pwith the delta pressure Pto determine if the selected AC Nozzle is uncalibrated or has failed.

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Glastonbury, CT, United States of America

Alessio Pulliero