Patent ID: 6363726
Filing Date: 2002-04-02
Classification: F23D,F23R

Abstract:
A mixer assembly for use in a combustion chamber of a gas turbine engine, said assembly comprising:a pilot mixer including an annular pilot housing having a hollow interior, a pilot fuel nozzle mounted in the housing and adapted for dispensing droplets of fuel to the hollow interior of the pilot housing, and an axial swirler positioned upstream from the pilot fuel nozzle having a plurality of vanes for swirling air traveling through the respective swirler to mix air and the droplets of fuel dispensed by the pilot fuel nozzle; and a main mixer including a main housing surrounding the pilot housing and defining an annular cavity, an annular fuel injector having a plurality of fuel injection ports arranged in a circular pattern surrounding the pilot housing and mounted inside the annular cavity of said main mixer for releasing droplets of fuel into swirling air downstream from the fuel injector, and an axial swirler positioned upstream from the plurality of fuel injection ports having a plurality of vanes for swirling air traveling through the swirler to mix air and the droplets of fuel dispensed by the fuel injection ports, said main mixer swirler and said pilot mixer swirler being coaxial.