TUBULAR COMBUSTION CHAMBER WITH IMPACT COOLING Russian patent published in 2012 - IPC F23R3/00 F23R3/06 F23R3/10 

FIELD: power engineering.

SUBSTANCE: tubular combustion chamber comprises a mostly cylindrical jacket comprising an inner cavity, an axis and a closed end of the axis. The closed end of the axis comprises a facility to inject fuel into the inner cavity of the jacket and an impact cooling sleeve. A mostly cylindrical insert of the combustion chamber is arranged coaxially inside the jacket and is arranged so that in combination with the jacket it makes it possible to set the borders of appropriate radially external channels for flowing air for combustion and dissolving air and appropriate radially internal cavities for the combustion area and dissolution area. The combustion area is located in direction of the axis at the side of the closed end of the jacket. The dissolution area is distanced in direction of the axis from the closed end of the jacket. The impact cooling sleeve is placed coaxially between the jacket and the combustion chamber insert and stretches in direction of the axis from the closed end of the jacket practically along the entire length of the combustion zone to the closed end of the sleeve. The sleeve is equipped with a large number of holes, which have the specified size and are distributed so that they make it possible to send air for combustion to the radially external surface of the combustion chamber insert section setting the combustion zone borders, for impact cooling. The radially external surface of the insert with impact cooling is made without holes. The flow of air for combustion and dissolving air passes in radially external channels in general in direction of the axis to the closed end of the jacket. The channel for dissolving air includes a large number of dissolution ports in the combustion chamber insert to ensure arrival of the dissolving air along the radius into the dissolution zone. The combustion chamber insert and the closed end of the axis are made so that actually the entire air for combustion before it arrives into the combustion zone flows through impact cooling holes.

EFFECT: invention provides for even distribution of flow sent to swirler blades, for operation with low emission of NO_x and even pre-mixing with the help of swirler blades and more efficient ratio between fuel and air for the required NO_x.

8 cl, 2 dwg