초록 ▼

A fuel injection device having three concentric streams of air for the atomization of fuel sprayed onto a sleeve by an injector facing into the sleeve. The inner and outer streams of air are imparted with swirl in opposite direction, while the central stream of air is free of swirl. The two inner st

A fuel injection device having three concentric streams of air for the atomization of fuel sprayed onto a sleeve by an injector facing into the sleeve. The inner and outer streams of air are imparted with swirl in opposite direction, while the central stream of air is free of swirl. The two inner streams of air atomize the fuel as a result of shear forces, while the outer stream of air forms a stable recirculation region in a combustion chamber into which the fuel injector device extends.

대표청구항 ▼

A fuel injection apparatus for a combustion chamber of a gas turbine for mixing fuel and compressed air and supplying the mixture to the combustion chamber, said apparatus comprising an injection nozzle for discharging fuel therefrom, a sleeve facing said nozzle in surrounding relation and including

A fuel injection apparatus for a combustion chamber of a gas turbine for mixing fuel and compressed air and supplying the mixture to the combustion chamber, said apparatus comprising an injection nozzle for discharging fuel therefrom, a sleeve facing said nozzle in surrounding relation and including a tubular portion extending downstream of the injection nozzle, said nozzle being provided with circumferentially spaced radial injection openings facing said sleeve to discharge fuel onto the sleeve, said tubular portion projecting a substantial axial distance downstream of said nozzle such that fuel discharged from the nozzle forms a film of fuel on said tubular portion, inner and outer air-feed devices respectively encircling said sleeve internally and externally thereof for supplying inner and outer streams of air with opposite directions of swirl around the sleeve for atomizing the film of fuel, said sleeve including a tapered portion which merges with said tubular portion to form a nozzle, said injection nozzle projecting into said tapered portion of said sleeve, said tubular portion of said sleeve being axially displaced downstream of said injection nozzle, and a central air-feed device disposed between said inner and outer air-feed devices, said central air-feed device having an air channel whose cross section tapers in narrowing fashion in the direction of air flow in said air channel, said tubular portion of said sleeve having a terminal edge at which fuel is discharged, said central air-feed device having a narrowest cross section at the terminal edge of said sleeve to feed a stream of air externally of the sleeve and radially inside said outer stream of air from said outer air-feed device without turbulence around said terminal edge of the sleeve.