Gas-turbine engine combustor having venturi mixers for premixed and diffusive combustion

A gas-turbine engine combustor having a plurality of venturi mixers, each 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 gaseous fuel to produce an air-fuel mixture and supply the air-fuel mixture to a combustion chamber for generating premixed combustion or diffusive combustion such that produced combustion gas rotates a turbine that outputs its rotation through an output shaft, while driving the compressor by the rotation;

• comprising:
• an air inlet formed in each of the venturi mixers and connecting to the air supply path;
• a fuel inlet formed in each of the venturi mixers and connecting to the supply source of gaseous fuel;
• an air-fuel mixture generating passage, formed in each of the venturi mixers, which connects to the air inlet and the fuel inlet and merges with an air-fuel mixture generating section to produce the air-fuel mixture;
• a first nozzle which opens into the combustion chamber at an end of the air-fuel mixture generating passage;
• an ignition plug installed on a center axis of the combustion chamber which ignites the air-fuel mixture and has a body and a heating element at its tip;
• a second fuel passage for diffusive combustion which is formed around the body of ignition plug and is connected to the supply of gaseous fuel;
• and
• a plurality of second nozzles which are located around the heating element of the ignition plug and open into the combustion chamber at an end of the second fuel passage.