FUEL NOZZLE FOR GAS TURBINE ENGINE

摘要

A fuel nozzle configured to channel fluid towards a combustion chamber is provided. The fuel nozzle includes a stem having a central passageway and at least one fuel tube disposed within the passageway. The fuel tube includes an outlet end portion having inner and outer walls separated by a cavity defined by a fixed aft face. The inner wall defines a central bore for delivering fuel to the combustion chamber. Further, the fuel nozzle includes an outer heat shield tube concentrically aligned with the outlet end portion of the fuel tube. The heat shield tube includes a circumferential outer wall having an aft face that stops upstream of the fixed aft face of the fuel tube. Thus, during operation, the heat shield tube is configured to thermally expand by sliding against the outer wall of the fuel tube.

主权项

1. A fuel nozzle for channeling fluid towards a combustion chamber defined within a gas turbine engine, the fuel nozzle comprising:
a stem comprising a central passageway; at least one fuel tube disposed within the central passageway, the fuel tube comprising an outlet end portion having an inner wall and an outer wall separated by a cavity defined by a fixed aft face, the inner wall defining a central bore for delivering fuel to the combustion chamber; and an outer heat shield tube concentrically aligned with the outlet end portion of the fuel tube, the heat shield tube comprising a circumferential outer wall having an aft face that stops upstream of the fixed aft face of the fuel tube, wherein, during operation, the heat shield tube is configured to thermally expand by sliding against the outer wall of the fuel tube.