Patent ID: 11898503
Assignee: PRATT & WHITNEY CANADA CORP.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 12:
13. A system for determining an engine temperature of a gas turbine engine, comprising
a combustor temperature estimator receiving at least one operating condition of the gas turbine engine and producing an estimated combustor temperature;
a vane mass flow estimator producing a vane mass flow to the combustor temperature estimator;
a combustor pressure determiner producing a combustor pressure;
a vane mass flow corrector receiving the estimated combustor temperature from the combustor temperature estimator, the vane mass flow from the vane mass flow estimator and the combustor pressure from the combustor pressure determiner, the vane mass flow corrector determining a corrected vane mass flow;
a vane mass flow comparator receiving the corrected vane mass flow from the vane mass flow corrector, the vane mass flow comparator comparing the corrected vane mass flow to a reference vane mass flow for obtaining a mass flow correction factor; and
a controller associated with the gas turbine engine updating the mass flow correction factor using an adjusted inlet mass flow until a mass flow correction condition is satisfied, and when the mass flow correction factor satisfies the mass flow correction condition, the controller outputting a signal to assign the estimated combustor temperature as the engine temperature for assisting at least one of the controller and an operator of the gas turbine engine in modulating at least one of a fuel flow provided to the gas turbine engine, modulating a position and orientation of variable geometry mechanisms within the gas turbine ermine, and modulating a bleed level of the gas turbine engine.