Liquid rocket engine and pintle injector thereof

Abstract

The invention relates to a liquid rocket engine and a pintle injector thereof. The pintle injector comprises a pintle and a liquid film forming piece, the pintle is provided with an internal flow channel extending in the axial direction of the pintle, one end of the pintle is a head used for extending into a combustion chamber, the head is of an inwards-concave structure concaved towards the interior of the pintle, and a through hole communicating with the internal flow channel is formed in the deepest position of the head; and the liquid film forming piece comprises a liquid film forming part which is arranged outside the internal flow channel and is opposite to the through hole, a flow guide channel is formed between the liquid film forming part and the outer wall of the head, and the flow guide channel is used for enabling a liquid film to be diffused on the outer wall of the head with the through hole as the center. The liquid rocket engine and the pintle injector thereof have the characteristic of high reliability.

Description

technical field [0001] The invention relates to the technical field of injectors, in particular to a liquid rocket engine and a pintle injector thereof. Background technique [0002] The liquid rocket engine converts the chemical energy in the propellant into kinetic energy through combustion, and is an indispensable power device for space transportation. In a liquid rocket engine, the liquid propellant enters the combustion chamber through the injector, and then the liquid oxidant and fuel are broken into droplets, evaporated into a gaseous state under high temperature conditions, and then undergo a chemical reaction to produce high-temperature gas, which is ejected through the nozzle Generate thrust. The injector determines the velocity, distribution and atomization of the propellant into the combustion chamber and therefore has a major impact on the performance of the engine. [0003] At present, pintle injectors have been widely used in liquid rocket engines because of...

AI Technical Summary

Problems solved by technology

Since the pintle injector protrudes into the combustion chamber, an obvious problem with the pintle injector is that the head of the pintle injector will be easily damaged due to the erosion of high-temperature gas, which will affect the normal operation of the engine.

However, in the existing solutions for preventing the head of the pintle from being corroded by high-temperature gas, the thermal protection efficiency is low, and the combustion performance or stability of the propellant will be reduced, and the reliability is low.

Images