METHOD FOR SUPPLYING FUEL COMPONENTS TO LIQUID-PROPELLANT ENGINE CHAMBER Russian patent published in 2013 - IPC F02K9/52 

FIELD: engines and pumps.

SUBSTANCE: supply method of fuel components to the liquid-propellant engine (LPE) chamber consists in supply of oxidiser, mainly oxygen, and fuel, mainly kerosene and hydrogen, to the cavity of the combustion chamber from the mixing head by means of coaxial jet injectors. Injectors include tubular housing with the main axial channel, as well as a blind tube fixed at least on one pylon coaxially to the housing inside it, which is made as an integral part of the pylon and the tubular housing. In the pylon there is at least one inlet through hole along the pylon from external surface of the injector to the axial channel in the blind tube on the side of its blind end, which is formed on the side of the outlet with its blind axial channel, and on the side of the inlet with the inlet through hole in the pylon; at that, the main axial channel of tubular housing on the side of the outlet is made with stepped change of flow passage with reduction of the flow passage of the housing from pylons to the outlet part, mainly in the form of one confuser. On the outlet part of the tubular housing there installed is a sleeve with formation between external surface of the housing and internal surface of the sleeve of an annular cavity, in which screw channels are arranged; on the side of axial inlet of the tubular housing there made is an adjusting element in the form of a chamfer; the tubular housing is split-type, on external surface of the blind tube arranged in outlet part of the tubular housing there made are pylons interacting with their outlet part to internal surface of the outlet part of the tubular housing; at that, longitudinal axes of the above pylons are installed at an angle to longitudinal axis of the injector; at that, in the pylons there made are channels, the inlet part of which is connected to the cavity of the blind tube, and the outlet part of which is connected to the annular cavity formed with the tubular housing and the blind tube; at that, the blind tube is split-type and consists of a pylon part and a tip; at that, a jet nozzle is installed at their joint point. Oxidiser flow is supplied to the combustion chamber in the form of two flows - main and additional; the main part of the oxidiser flow is supplied axisymmetrically through the channel inside the injector tip, and the additional part is supplied tangentially through the channels, which are made in pylons of the injector tip, which interact with their outlet part to internal surface of the tubular housing; at that, longitudinal axes of the channels are made at an angle to longitudinal axis of the injector, thus providing tangential component of velocity of the additional part of the flow and its swirling; at that, flow of the first fuel is supplied axisymmetrically to the injector axis to the pylons and directed to the pylons, thus giving to it the tangential component of velocity, and kerosene flow is supplied through the annular cavity, thus giving to it the tangential component of velocity; at that, rotation of fuel flows and additional part of oxidiser to opposite sides is provided.

EFFECT: increasing the economy of the working process both at operation of the coaxial jet injector as three-component (oxygen-kerosene-hydrogen) and as two-component (oxygen-hydrogen).

3 cl, 3 dwg