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In a two stage burner construction in which primary fuel burns in an annulus in a primary combustion zone and secondary fuel is discharged through the primary zone to a secondary zone downstream of the primary zone, vortex generators are used in the passage through which the fuel and air entering th

In a two stage burner construction in which primary fuel burns in an annulus in a primary combustion zone and secondary fuel is discharged through the primary zone to a secondary zone downstream of the primary zone, vortex generators are used in the passage through which the fuel and air entering the primary zone to enhance the mixing and to improve the toroidal flow in the combustion zone. Other vortex generators are used to improve the mixing of the secondary fuel and air to improve secondary combustion. The vortex generators may be used in conjunction with a trip on the secondary nozzle tube to further enhance primary combustion.

대표청구항 ▼

A burner construction including: an inlet end cap; sidewalls extending downstream from the cap to define a primary combustion zone, said walls converging in a downstream direction at a point spaced from the cap to define a throat and diverging again downstream of the throat to define a secondary com

A burner construction including: an inlet end cap; sidewalls extending downstream from the cap to define a primary combustion zone, said walls converging in a downstream direction at a point spaced from the cap to define a throat and diverging again downstream of the throat to define a secondary combustion zone; an annular primary nozzle in the end cap for directing air and fuel at a large angle relative to the axis of the burner into the primary zone adjacent to the cap, said nozzle including an annular discharge fuel path and a surrounding ring having an inturned end flange and forming an annular air path; a secondary nozzle within the annular nozzle for directing fuel and air at a small angle and substantially parallel to the burner axis, this small angle and the spacing of the throat from the cap being such that substantially all the fuel passes through the throat; and vortex generating vanes positioned on the flange on said ring to create vortices in the air in said air path.