Expansion cycle liquid oxygen and methane upper-stage engine system

Abstract

An expansion cycle liquid oxygen and methane upper-stage engine system comprises a propellant supply system, an ignition system and a thrust chamber. The propellant supply system comprises a methane supply system and a liquid oxygen supply system, the methane supply system pressurizes low-temperature liquid methane from an external storage tank and then supplies the low-temperature liquid methaneto the thrust chamber; the liquid oxygen supply system pressurizes the low-temperature liquid oxygen from the external storage tank and then supplies the low-temperature liquid oxygen to the thrust chamber; and the ignition system is located at the head of the thrust chamber and ignites under the control of a control system, liquid oxygen and methane entering the thrust chamber are ignited, and generated high-temperature gas is sprayed out of the nozzle of the thrust chamber to generate thrust force. The liquid oxygen and liquid methane are used as a propellant combination, and a closed expansion circulation system scheme is adopted, so the system is simple, the inherent reliability is high, the specific impulse performance is high, and repeated starting is easy to achieve.

Description

technical field [0001] The invention relates to an expansion cycle liquid oxygen methane upper stage engine system, which belongs to the technical field of liquid launch vehicle engines. Background technique [0002] The upper stage refers to a relatively independent one-stage or multi-stage rocket added to the base-stage rocket or a reusable carrier. The working section has usually entered the earth orbit, and one or more spacecraft can be directly sent into the predetermined working orbit or predetermined Spatial location. The mission mode of the upper level is between the carrier and the spacecraft, and has both the technical characteristics of the carrier and the spacecraft; the working time can reach several hours, days or even months, and experience the space environment similar to the spacecraft; the engine needs Multiple starts, multiple mission modes, and strong mission adaptability; compared with spacecraft such as satellites, the upper stage engine has a larger t...

AI Technical Summary

Problems solved by technology

[0008] Domestic liquid oxygen methane rocket engines are still in the research and development stage. Previously, there was no research on the pump pressure closed expansion cycle engine with liquid oxygen methane propellant combination. Technology gap with foreign countries

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