Combustor assembly for low-emissions and alternate liquid fuels

A combustor assembly comprising:

• a fuel injector comprising:
• an inner injector tube comprising an outlet portion defining an outlet;
• an outer injector tube spaced radially apart from at least the outlet portion of the inner injector tube, the outer injector tube having an outer injector tube outlet disposed radially adjacent the outlet of the inner injector tube;
• and
• an orifice plate defining a central opening having an inlet side and an outlet side, the central opening defining a frustoconical cross-sectional shape as taken along a central axis extending through the central opening, wherein an inner diameter of the inlet side is smaller than an inner diameter of the outlet side and the inner diameter of the inlet side is substantially the same as an inner diameter of the outlet of the inner injector tube, and wherein the central opening of the orifice plate is co-axial with the outlet of the inner injector tube, and the inlet side is spaced apart axially downstream from the outlet of the inner injector tube;
• and
• a swirler disposed radially outwardly and adjacent the outer injector tube outlet, the swirler comprising a central hub, a first plurality of vanes extending therefrom at a first angle greater than 0 degrees from a plane extending perpendicular to a central axis of the central hub, and a second plurality of vanes disposed radially outwardly of the first plurality of vanes and at a second angle greater than 0 degrees from the plane, wherein the swirler is in fluid communication with a gas supply plenum adjacent an inlet side of the swirler and a combustion housing adjacent an outlet side of the swirler,
• wherein the orifice plate directly contacts the outer injector tube, and
• wherein the outer injector tube is co-axial with the inner injector tube.