Patent ID: 6560967
Filing Date: 2003-05-13
Classification: F02C,F23D,F23N,F23R

Abstract:
Apparatus for use in a system having a gas fuel supply and a combustor that burns a mixture of gas fuel and air, the combustor having a pressure magnitude, the apparatus comprising:a premixer in flow communication with the combustor; a first fuel line providing substantially non-modulated fuel flow rate communication between the gas fuel supply and said premixer; a second fuel line providing periodically modulated fuel flow rate communication between the gas fuel supply and said premixer; a first fuel actuator associated with said second fuel line for providing said periodically modulated fuel flow; a second fuel actuator associated with said second fuel line for further periodically modulating said modulated fuel flow; and wherein said premixer provides a mixture of gas fuel and air to the combustor, and said modulated fuel flow rate communication is adapted to substantially reduce variations in the magnitude of the pressure in the combustor.