LIQUID-PROPELLANT ENGINE CHAMBER Russian patent published in 2013 - IPC F02K9/52 

FIELD: engines and pumps.

SUBSTANCE: liquid-propellant engine chamber includes a regeneratively cooled combustion chamber with critical section and a nozzle, a mixing head including a housing, an oxidiser supply unit, mainly oxygen, main fuel supply unit, additional fuel supply unit and a fire bottom unit. In the above units there installed in concentric circles are coaxial uniaxial-jet injectors forming central and peripheral zones. The above coaxial uniaxial-jet injectors include a hollow tip attaching the oxidiser cavity to combustion zone, a sleeve enveloping the tip with a gap and attaching the cavity of the first fuel to combustion zone; in tips at least of injectors if the central zone in the outlet part there are radially located slots mad in the form of alternating projections and cavities. Radially located slots are made so that perimetre of central part of the jet part, which is restricted with beam generatrixes, is not more than 3s, and beam length is 2.3…2.5s, where s is beam thickness. Number of beams is equal to three; in the sleeve between projections of the tip there are channels, the outlet part of which opens to combustion zone made in the sleeve housing, and the inlet part is connected to the additional fuel cavity. The above cavity in the sleeve housing is connected through tangential channels to a annular groove made on the sleeve end and connected to combustion zone.

EFFECT: invention provides increased economy of an operating process at operation of a mixing head of the chamber.

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