Anti-backfire nozzle and liquid rocket engine with the nozzle

Abstract

The invention discloses an anti-backfire nozzle and a liquid rocket engine with the same. The nozzle is used for connecting a liquid accumulation cavity and a combustion chamber of an engine. The nozzle comprises a body, a plurality of gaps are formed in the surface of the body, the gaps are evenly distributed in the surface of the body, the gaps do not intersect with the edge of the body, and thegaps penetrate through the body in the height direction of the body and communicate with the liquid accumulation cavity and the combustion chamber so that propellant in the liquid accumulation cavitycan flow into the combustion chamber through the gaps. The invention relates to the technical field of rocket power devices. According to the anti-backfire nozzle, heat can be rapidly dissipated, combustion of propellant in gaps is inhibited, propagation of flame backtracking is effectively prevented, the anti-backfire effect is achieved, and the efficient conveying requirement of the propellantis met. The liquid rocket engine is good in anti-backfire performance, high in safety and high in propellant conveying efficiency, and excellent working performance of the engine is guaranteed.

Description

Technical field [0001] The invention relates to the technical field of rocket power equipment, in particular to an anti-backfire nozzle and a liquid rocket engine with the nozzle. technical background [0002] Nitrous oxide-based composite propellant is a single-component propellant made by premixing nitrous oxide with fuel. Compared with the traditional propulsion technology, single-component propulsion technology has the advantages of green, non-toxicity, high specific impulse, low cost and easy maintenance, etc. It is a kind of propulsion technology with great development potential. Nitrous oxide-based composite propellant is easy to gasify in the conventional state, and its gas-phase combustion speed is extremely fast. Therefore, when the engine is ignited, shut down and burned, it is easy to backfire, resulting in the explosion of the supply system, which poses a potential safety hazard. [0003] Conventional anti-backfire measures, such as setting water seal, molecular seal...

AI Technical Summary

Problems solved by technology

Although the use of capillary in the patent CN109854412A can effectively prevent backfire, but because the cross-sectional area of ​​the capillary is too small, its ability to transport propellant is limited, which cannot meet the needs of high-thrust engines.

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