FIELD: astronautics.
SUBSTANCE: invention relates to devices and systems for work material gas-cylinder feed system to rocket engines (RE) of space vehicles (SV). Work material feed system, containing a container with two hemispheres of radius r, as well as the nozzle, the displacer, made in the form of a body in the form of a hollow cylinder of a composite material with an internal diameter equal to the internal diameter of the hemispheres, and circular grooves on the end surfaces, compression rings made in one piece with the hemispheres of composite material, located in the end planes of the hemispheres with the coincidence of the inner diameters of these rings with the internal diameters of the hemispheres, elements of displacement in the form of continuous circular plates of alloy with the shape memory effect, adjacent to the internal surfaces of the hemispheres, and closed in the grooves of the body of the displacer by the compression rings, while the distance from the end face of the displacement element to the end part of the housing groove is equal to πr/2 + Δr, where Δr is the correction for the linear expansion of the displacement element when the alloy is heated with a shape memory effect, and the fitting is installed on the lateral cylindrical surface of the displacer body, each displacement element is provided with heating supply elements, while the hemispheres, and also the body of the propellant with the compression rings are placed in the power casing. Method of operation of the work material feed system is considered, which includes filling the device with a high-pressure working medium, measurement of pressure and temperature of the working fluid, storage of the working fluid during thermal regulation within the specified temperature range, work material feeding to the executive bodies by way of its bypass until baro-dynamic balance is reached, in the process of filling and storing the working fluid, its temperature is kept below the temperature of the reverse transition temperature of the alloy of the displacement element from the martensitic to the austenite state, and after achieving baro-dynamic equilibrium, the working material is fed from the volume of the container bounded by one of the hemispheres by heating the corresponding displacement element, to the temperature of complete transformation of the alloy from the martensitic to the austenitic state, the time of the beginning of the feed being determined from the calculated change in the high pressure pV21 in the capacity of the working material feed system
where pV1 – baro-dynamic equilibrium pressure; V1 – the internal volume of the capacity of the working material feed system; V21 – the internal volume of the container with the working body, after the activation of one of the displacement elements, and the end of the feed – after the current high pressure has reached the baro-dynamic equilibrium, then the working material is fed in the above manner by displacing the container from the volume, bounded by a second hemisphere, wherein the feed start time is determined from the design change in the high pressure pV23
where V22 – the internal volume of the container with the working body after the actuation of two displacement elements, further, the supply of the working material is continued until the baro-dynamic equilibrium pressure is finally established.
EFFECT: invention provides the generation of RT residues from the feed device at the final stage of operation.
2 cl, 7 dwg
