Abstract: A combination apparatus having a swirl chamber for mixing primary air and atomized fuel in a primary helical flame vortex and a splitting chamber downstream of the swirl chamber for shearing off secondary helical flame vertexes from the primary vortex rotatably meshed with the prime vortex. Cutting blades positioned in the splitting chamber slice outer portions of the helical primary vortex into channels formed between the blades. The blades are longitudinally disposed perpendicular to the movement of the primary flame vortex and are tilted toward the primary flame vortex at an increasing angle relative to the longitudinal axis between the upstream and downstream portions of the splitting chamber. An intermediate stabilizing chamber can be positioned between the upstream swirl chamber and the downstream splitting chamber.

Abstract: In a combustion apparatus having an ignition means, a plurality of first swirl vanes positioned at the upstream end of a flame retention head creates a helical primary air/fuel mixture in the combustion chamber of the retention head that ignites into a primary flame vortex. A second plurality of vanes mounted on the inner walls of the retention head shears the outer portions of the primary flame vortex into a plurality of secondary helical flame vortexes disposed about the perimeter of the primary flame vortex. The secondary flame vortexes are opposite in rotational orientation to the direction of rotation of the primary flame vortex. Secondary air is injected into the combustion chamber at the area of shearing.