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

FIELD: engines and pumps.

SUBSTANCE: in a cooling system of a liquid-propellant engine chamber, which includes a cylindrical combustion chamber and a nozzle containing in its turn convergent and divergent parts and a critical section between them, which are made in the form of an external cover, an internal cover with the main fins of constant thickness, which form a cooling circuit, according to the invention, on the inner surface of the external cover in the area of convergent and divergent parts of the combustion chamber there are additional longitudinal fins; with that, height and thickness of additional longitudinal fins does not exceed height and thickness of the main fins.

EFFECT: improved cooling of a critical section of the nozzle and increased specific thrust of an engine.

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