LIQUID-PROPELLANT ENGINE Russian patent published in 2013 - IPC F02K9/42 

FIELD: engines and pumps.

SUBSTANCE: liquid-propellant engine includes a gas generator, a turbo-pump unit, feed and control elements, an annular regeneratively cooled chamber including a shaped central body in which inner cavity above mentioned units are installed, a mixing head including a housing, an oxidiser supply unit, a hydrogen supply unit and a kerosene supply unit. Coaxial jet injectors are installed in the above units of the mixing head along concentric circles and include 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 that, 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. 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 a confuser. A sleeve is installed on the outlet part of the tubular housing so that an annular cavity, in which screw channels are arranged, is formed between outer surface of the above housing and inner surface of the sleeve. The above channels are spread on the side of outer surface of the injector till they interact with the main axial channel. On the side of the axial inlet of the tubular housing there made is an adjustment element in the form of a chamfer provided with possibility of changing its geometrical parameters during adjustment. Tubular housing is split-type. On outer surface of the blind tube, which is arranged in outlet part of the tubular housing, there made are pylons interacting with inner surface of the tubular housing. Longitudinal axes of the above pylons are installed at an angle to longitudinal axis of the injector. In the pylons there are the channels, the outlet part of which is directed at an angle to longitudinal axis of the injector, which is different from the installation angle of longitudinal axes of the above 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. The blind tube is split-type and consists of a pylon part and a tip; besides, at their interface point there installed is a jet nozzle, the blind tube is fixed coaxially to the housing inside it on two radially directed pylons, which are equally spaced in a circumferential direction, inside each of which there arranged are two transverse inlet through holes.

EFFECT: increasing specific burst of power, simplifying pneumatic-hydraulic circuit, and implementing high pressure in the chamber.

2 cl, 6 dwg