COOLING SYSTEM OF LIQUID-PROPELLANT ENGINE COMBUSTION CHAMBER Russian patent published in 2014 - IPC F02K9/64 

FIELD: engines and pumps.

SUBSTANCE: in a cooling system of a combustion chamber of a liquid-propellant engine, which includes external and internal walls, there installed with a gap and connected by soldering through ribs made on the internal wall is at least one boundary cooling device of the internal wall of the combustion chamber, which in its turn includes an annular part centred along the internal wall with formation of an annular cavity, an annular slot in the internal wall and internal tangential openings attaching that slot to the annular cavity, dosing openings attaching the gap between two walls to the annular cavity, according to the invention, the annular part and the annular cavity in it have a trapezoid shape; with that, the annular part includes a front wall, a cylindrical wall and a rear wall, which are installed with a gap inside a manifold, dosing openings are tangential and directed similar to internal tangential openings, and height of the gap between the front end face and the manifold is less than height of the gap between external and internal walls. Ratio of height of the gap between the front end face and the manifold to the height of the gap between external and internal walls is in the range of 0.5 to 0.9. Internal tangential openings are made in the plane perpendicular to combustion chamber axis. Finning is made on the front end face. Finning is made on the rear end face. Finning is made on the cylindrical wall. Ratio of length of internal tangential openings to their diameter is in the range of 1.0 to 2.5. Dosing openings are calibrated. Calibrated jet nozzles are installed into dosing openings.

EFFECT: improved cooling of a combustion chamber and increased specific thrust of an engine.

9 cl, 6 dwg