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 and fuel to the cavity of the combustion chamber from cavities of a mixing head by means of coaxial jet injectors containing a tubular housing with the main axial channel, which has an axial inlet and outlet, as well as a blind tube at least on one pylon, which is fixed coaxially to the housing inside it and made as an integral part of the pylon and the tubular housing. At least one inlet through hole is made along the pylon from external surface of the injector to the axial channel in the blind tube on the side of its blind end. The blind tube channel is formed on the outlet side with its blind axial channel and on the inlet side with an inlet through hole in the pylon. The main axial channel of the tubular housing on the side of the outlet has stepped change of the flow passage, which is made so that the flow passage of the housing is reduced from pylons to the outlet part in the form of one confuser. A sleeve is installed on the outlet part of the tubular housing so that an annular cavity, in which screw channels are arranged from outer surface of the injector till they interact with the main axial channel, is formed between outer surface of the housing and inner surface of the sleeve. Tubular housing is split-type. On external surface of the blind tube, there made are pylons interacting with inner surface of the tubular housing outlet part. Longitudinal axes of the pylons are installed at an angle to longitudinal axis of the injector. Channels of the outlet part are made at an angle to longitudinal axis of the injector, which is different from the installation angle of longitudinal axes of the pylons. The inlet part of the channels is connected to the cavity of the blind tube, and the outlet part is connected to the annular cavity formed with the tubular housing and the blind tube, which is split-type; 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; value of the oxidiser flow is provided by changing the flow passage of the jet nozzle installed at the connection point of the pylon part and the tip of the blind tube. The main part of oxidiser flow is supplied axisymmetrically through the channel inside the injector tip, and the additional part is supplied tangentially through channels in pylons of the injector tip, which interact with inner surface of the tubular housing. 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. Fuel flow is supplied axisymmetrically to the injector axis and directed to the pylons, thus providing it with tangential velocity component. Direction of tangential velocity component of oxidiser supplied from channels in the pylons is interconnected to opposite side in relation to tangential velocity component of fuel supplied through screw channels. Fuel flow is provided owing to changing geometrical dimensions of the adjustment element. In the mode of the first stage, oxygen, kerosene and hydrogen is supplied to the liquid-propellant engine chamber, and in the mode of the second stage and further, oxygen and hydrogen is supplied.

EFFECT: increasing the economy of the injector operating process.

1 cl, 4 dwg