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1. A fuel nozzle assembly comprising:
a fuel plenum, a fuel nozzle outer wall, and a fuel nozzle inner wall, the fuel nozzle inner wall defining a cartridge location and comprising a fuel plenum inlet in fluid communication with the fuel plenum; a plurality of mixing tubes extending through the fuel plenum between the fuel nozzle outer wall and the fuel nozzle inner wall, the plurality of mixing tubes each for delivering an air/fuel mixture through one end of the mixing tube, wherein the mixing tubes are disposed substantially in parallel to each other; a removable fuel cartridge located in the cartridge location defined by the fuel nozzle inner wall outside of each of the plurality of mixing tubes, the removable fuel cartridge comprising: a fuel cartridge outer wall, the fuel cartridge outer wall comprising a fuel cartridge outlet in fluid communication with the fuel plenum inlet when the removable fuel cartridge is inserted into the cartridge location; a first cartridge compartment disposed around an axis of the cartridge and a second cartridge compartment disposed between the fuel cartridge outer wall and the first cartridge compartment, wherein the first cartridge compartment is configured to contain a pressurized liquid fuel and the second cartridge compartment is configured to contain a pressurized gaseous fuel for delivery through the fuel cartridge outlet into the fuel plenum, wherein the removable fuel cartridge is configured so that the liquid fuel is directed through the removable fuel cartridge without flowing through the mixing tubes; and annular lip seals disposed around the fuel cartridge outer wall between the fuel cartridge outer wall and the fuel nozzle inner wall, a first one of the lip seals on one side of the removable fuel cartridge outlet and a second one of the lip seals on a second side of the removable fuel cartridge outlet for sealing the fuel cartridge outer wall against the fuel nozzle inner wall in a substantially gas tight fashion. |
