초록 ▼

A combustor useful for combustion of initially liquid fuel to provide motive fluid for gas turbines is described. The combustor includes an air-swirling cyclonic prechamber having a wide-angle spray-cone liquid nozzle and opening to a downstream combustion chamber. The prechamber provides long resid

A combustor useful for combustion of initially liquid fuel to provide motive fluid for gas turbines is described. The combustor includes an air-swirling cyclonic prechamber having a wide-angle spray-cone liquid nozzle and opening to a downstream combustion chamber. The prechamber provides long residence time for liquid fuel being vaporized therein, short residence time for the resulting mixture of fuel vapor and air, and capability for minimal formation of nitrogen oxides.

대표청구항 ▼

A combustion apparatus for a gas turbine engine comprising, in combination: (a) a combustion liner defining a combustion chamber terminating at its upstream end in an inlet throat and termination downstream of said throat in an outlet for exhausting combustion gases, (b) a cyclonic prechamber assemb

A combustion apparatus for a gas turbine engine comprising, in combination: (a) a combustion liner defining a combustion chamber terminating at its upstream end in an inlet throat and termination downstream of said throat in an outlet for exhausting combustion gases, (b) a cyclonic prechamber assembly including (i) a cyclonic prechamber adapted to vaporize liquid fuel therein, said prechamber being substantially cylindrical through at least a portion of its axial extent, terminating at its downstream end in said throat, and opening to said combustion chamber through the throat; (ii) a plurality of converging, spaced-apart highly-angled vanes disposed circumferentially about the cylindrical portion of said prechamber such that the ratio of “total chamber flow area”to the cylindrical area of said prechamber is from about 0.05:1 to about 0.5:1, with opposing faces of each pair of adjacent vanes defining inwardly converging airflow channels adapted to introduce air therethrough with a high tangential component of velocity into the prechamber; (c) means in flow communication with the upstream end of said prechamber for introducing liquid fuel with a spray pattern in the form of a substantially hollow cone coaxial with said prechamber and having a vertex angle sufficiently large such that the introduced fuel is directed toward an upstream portion of each vane and not toward said throat opening, and (d) an ignitor in said combustion chamber for igniting fuel vapor received in premixed form from said prechamber.