FIELD: engines and pumps.
SUBSTANCE: injection system includes an injector, with main axis (A), a round expansion ring coaxial to the above injector, a primary air swirler coaxial to the above ring, which is arranged at the outlet of the above injector and a Venturi tube arranged at the swirler outlet. The ring has the holes distributed around that main axis, opening on inlet surface of the above ring and providing the air flow to the outlet zone of the above ring. The ring includes an annular conical slot that converges to the outlet and opens to the outlet. Holes are opened to the inlet slot part. Axis of each of those holes forms with main axis (A) an angle that strictly exceeds the angle that forms with the main axis a cone generatrix determining the above annular slot. The air leaving the above holes collides with internal wall of the annular slot, which is located maximum close to the main axis. The air flow leaving the annular slot and the air flow leaving the primary air swirler are taken out essentially parallel to each other without being mixed at the injector outlet, thus reducing swirls at the injector outlet.
EFFECT: reduction of swirls at the injector outlet.
12 cl, 5 dwg
