Final-stage passivation method for liquid oxygen kerosene of carrier rocket

Abstract

The invention relates to a final-stage passivation method for liquid oxygen kerosene of a carrier rocket. The final-stage passivation method for the liquid oxygen kerosene of the carrier rocket comprises the following steps: installing a main engine passivation electromagnetic valve on a main engine control gas cylinder; firstly, after the final stage of the carrier rocket is separated from a satellite, conducting rocket body attitude adjustment; after rocket body attitude adjustment is completed, conducting maneuvering deorbit; after maneuvering deorbit is completed, discharging a propellant in a liquid oxygen storage tank and a kerosene storage tank through a valve of a main engine; then exhausting and depressurizing a storage tank pressurizing gas cylinder; exhausting and depressurizing a main engine blow-off gas cylinder; controlling gas cylinder exhausting and depressurizing through the main engine, and making an auxiliary power system continuously work to conduct attitude control on the final stage, so as to consume a residual attitude control propellant of the auxiliary power system; and finally, making a rocket-borne battery continuously work to supply power to final-stage electrical equipment, so as to consume residual battery power. According to the final-stage passivation method for the liquid oxygen kerosene of the carrier rocket, final-stage rocket passivation treatment can be achieved by adopting the liquid oxygen kerosene propellant, it is ensured that the final-stage rocket is not disintegrated in orbit and has an enough safety distance from a satellite orbit, and no valves or pipelines need to be additionally arranged on the rocket.

Description

technical field [0001] The invention belongs to the field of carrier rocket design and relates to a passivation method for the last stage of the carrier rocket with liquid oxygen and kerosene. Background technique [0002] With the increase of human space activities, the number of debris in low-Earth orbit is increasing day by day. If the number reaches saturation, the probability of collision between debris and satellites will increase to an unacceptable range, and may even cause a chain reaction of collisions, which seriously threatens on-orbit operations. Passivation of the final stage of the launch vehicle is an important measure to reduce the generation of space debris for the safety of the spacecraft. [0003] The passivation of the final stage of the launch vehicle is mainly to minimize the possibility of disintegration in orbit by emptying the remaining propellant and high-pressure gas source, exhausting the battery energy, etc. The system has a high degree of corre...

AI Technical Summary

Problems solved by technology

At present, there are many researches on the passivation schemes of the final stage of conventional propellants and the final stage of liquid hydrogen and liquid oxygen in my country, and they have been verified by flight tests, but there are very few studies on the passivation schemes of the final stage using liquid oxygen and kerosene propellants

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