Gas-turbine engine control system

A system for controlling a gas-turbine engine having a plurality of venturi mixers, connected to an air supply path that passes air compressed by a compressor and to a supply source of gaseous fuel, which mix the air and the fuel in response to selected one of combustion modes comprising premixed combustion and diffusive combustion, to produce an air-fuel mixture and supply the air-fuel mixture to a combustion chamber such that produced combustion gas rotates a turbine that outputs its rotation through an output shaft, while driving the compressor by the rotation;

• comprising:
• detecting means for detecting a temperature of the air supplied to the mixers and a pressure of the fuel supplied to the mixers;
• flow rate determining means for determining a flow rate of the fuel supplied to the mixers based on at least the detected pressure of the fuel;
• adiabatic flame temperature determining means for determining an adiabatic flame temperature in the combustion chamber based on at least the determined flow rate of the fuel;
• combustion switching determination conducting means for conducting a determination as to whether the selected one of the combustion modes is to be switched to other of the combustion modes, based on the determined adiabatic flame temperature and the detected air temperature;
• and
• combustion switching controlling means for controlling to switch the selected one of the combustion modes to the other in response to a result of determination of the combustion switching determining means.