Fluid sprinkling – spraying – and diffusing – Processes – Of fuel injection
Patent
1987-02-05
1989-12-05
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Processes
Of fuel injection
239 8, 239400, 239402, 239404, 239406, B05B 710
Patent
active
048847461
ABSTRACT:
A fuel nozzle having two concentric flow paths, the interior flow path comprising a first swirl chamber having a first diameter, an exit chamber having a second diameter selected to be smaller than the first diameter, and a convergent section joining the first swirl chamber and the exit chamber. The exterior flow path comprises an annular second swirl chamber formed about the periphery of the exit chamber. The interior flow path has a fuel and air mixture flowing therethrough while the exterior flow path has air only flowing therethrough. Fuel in the interior flow path is caused to lie in a film and flow circumferentially about the internal wall of the first swirl chamber by air entering into the first swirl chamber through inlet holes which are configured to direct the air tangentially along the internal wall surface of the first swirl chamber. As the fuel film moves axially through the convergent section and into the exit chamber, the tangential velocity increases due to the smaller diameter of the exit chamber. Air in the annular second swirl chamber is directed into close association with the air and fuel leaving the exit chamber and the increased tangential velocity of the fuel film enhances the shearing effect of the air from the second swirl chamber on the fuel film to thereby break-up the fuel film into fine droplets at low fuel flow rates.
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patent: 4559009 (1985-12-01), Marino et al.
Forman Michael J.
Kashnikow Andres
Radial Turbine International A/S
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