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

FIELD: engines and pumps.

SUBSTANCE: mixing head of a liquid-propellant engine chamber includes a housing, a unit for supply of oxidiser, mainly oxygen, a main fuel supply unit, an 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. Coaxial uniaxial-jet injectors include a hollow tip attaching the oxidiser cavity to combustion zone, a sleeve enclosing the tip with a gap and attaching the first fuel cavity to combustion zone. In tips of at least injectors of central zone, in the outlet part there are radially located slots made in the form of alternating projections and cavities. Radially located slots are made so that perimetre of central part of the jet, 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 a cavity 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 an annular groove made on the sleeve end and connected to combustion zone.

EFFECT: improving completeness of mixture formation.

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