An expansion cycle liquid oxygen methane upper stage engine system

Abstract

An expansion cycle liquid oxygen methane upper stage engine system including a propellant supply system, an ignition system and a thrust chamber. The propellant supply system includes a methane supply system and a liquid oxygen supply system. The methane supply system pressurizes the cryogenic liquid methane from the external storage tank and supplies it to the thrust chamber; the liquid oxygen supply system pressurizes the cryogenic liquid oxygen from the external storage tank. After pressurization, it is provided to the thrust chamber; the ignition system is located at the head of the thrust chamber, and is ignited under the control of the control system to ignite the liquid oxygen and methane entering the thrust chamber, and the high-temperature gas generated is ejected from the nozzle of the thrust chamber to generate thrust. The present invention uses liquid oxygen and liquid methane as a propellant combination, and adopts a closed expansion cycle system scheme. The system is simple, has high inherent reliability, high specific impulse performance, and is easy to realize multiple starts.

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

Images