METHOD FOR PREPARING GAS FOR THE PRESSURIZATION SYSTEM OF FUEL TANKS AND FOR THE REACTIVE CONTROL SYSTEM OF A REUSABLE LAUNCH VEHICLE AND A DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2023 - IPC F02K9/50 B64D37/22 B64D37/24 

FIELD: rocketry.

SUBSTANCE: used in pressurization systems for fuel tanks of launch vehicles (LV) with liquid-propellant rocket engines (LRE). A method for preparing gas for a pressurization system of fuel tanks and for a reactive control system (RCS) of a reusable launch vehicle, including the use of decomposition products of hydrogen peroxide (HP) for heating cold helium gas, when a propulsion liquid-propellant rocket engine is operating, the supply of HP decomposition products is carried out in plate and mixing heat exchangers, heated helium gas from the plate heat exchanger is fed into the fuel tank, and from the mixing heat exchanger the mixture of helium gas and HP decomposition products is fed to the separator for water separation and then the dried mixture is fed to the oxidizer tank, and in the passive section of the trajectory for the operation of the nozzles The RCS close the valves for supplying boost gas to the fuel and oxidizer fuel tanks and helium gas to the plastic heat exchanger, reduce the helium flow rate for supply to the mixing heat exchanger, increase the HP flow to obtain a gas mixture in the mixing heat exchanger from helium and HP decomposition products with a temperature of 700 K, further, a gas mixture of helium and decomposition products of HP is fed into the nozzles of the jet control system. A device for implementing the method is considered, which includes helium cylinders, a gas generator based on HP, controlled valves on the lines for supplying cold and heated helium to the tanks, a thermal bridge, while the executive bodies of the RCS in the form of gas-jet nozzles, plate and mixing heat exchangers, a separator for separating water from the mixture coming from the mixing heat exchanger, a drain valve for discharging liquid over the side of the stage, connected to a thermal bridge with a plate heat exchanger, pipelines connecting the separator with the oxidizer tank and RCS actuators through controlled valves.

EFFECT: improvement of mass characteristics.

3 cl, 3 dwg