GAS TURBINE FUEL CONTROL

摘要

An electrical fuel control system for a gas turbine engine balances a turbine inlet temperature signal against an allowable turbine inlet temperature signal as means for limiting fuel flow to the engine during acceleration. The turbine temperature signal is generated by a thermocouple which has time lag. This signal is compensated for the time lag and for other parameters to improve engine response by a compensating circuit including an operational amplifier. The amplifier has an integrating feedback to compensate for thermocouple lag and it has a differentiating input of a fuel flow signal to provide damping. It has also a feedback of engine acceleration which reduces the temperature compensation to allow for increased fuel flow in anticipation of increased airflow resulting from the acceleration.