Pintle injector and liquid rocket engine provided with same

Abstract

The invention relates to a pintle injector and a liquid rocket engine provided with the same. The pintle injector comprises a pintle and a rotational flow piece, wherein the pintle is provided with aninternal 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 sunkentowards the interior of the pintle, and a mounting hole communicating with the internal flow channel is formed in the deepest position of the head; and the rotational flow piece is arranged in the mounting hole and is provided with a flow guide channel communicating with the inner flow channel, and the flow guide channel is used for enabling a propellant in the inner flow channel to be attached tothe outer wall of the head to flow after the propellant passes through the flow guide channel. According to the pintle injector and the liquid rocket engine, the propellant in the inner flow channelcan be attached to the outer wall of the head of the pintle to flow under the action of the rotational flow piece, the head of the pintle is isolated from high-temperature fuel gas, and thermal protection of the head of the pintle is achieved.

Description

technical field [0001] The invention relates to the technical field of injectors, in particular to a pintle injector and a liquid rocket engine with the same. 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 beca...

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 combustion performance or stability of the propellant will be reduced and the reliability will be low.

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