Abstract: A gas turbine engine operable using either one of a first fuel and a second fuel includes a water supply and a diffusion flame burner including an innermost spray cone, a plurality of spray cones positioned around the innermost spray cone and grouped into a plurality of stages, and a plurality of outlets positioned around the innermost spray cone. A plurality of valves is arranged to connect the first fuel, the second fuel, and the water supply to the diffusion flame burner and a controller is operable to configure the plurality of valves at least in part in response to which of the first fuel and the second fuel is being consumed. When consuming the first fuel, the valves are configured to deliver a mixture of the first fuel and a quantity of water to the plurality of outlets, and to deliver a quantity of water to the plurality of spray cones, and to selectively activate one or more of the stages to allow passage through only the spray cones of the activated stages.

Abstract: A diffusion flame burner (110) is provided for a gas turbine engine (136). The diffusion flame burner includes concentrically oriented spray cones (112) staged in a plurality of stages (114, 116, 118, 120) and attached to a water supply (122) during a gas mode and attached to an oil supply (124) during an oil mode. The diffusion flame burner also includes a central spray cone (130) positioned at a center (132) of the concentrically oriented spray cones and attached to the water supply during the oil mode. The diffusion flame burner also includes a plurality of concentrically oriented outlets (134) positioned outside the plurality of concentrically oriented spray cones and attached to a combined water and natural gas supply (122, 128) during the gas mode.