Liquid rocket engine and its pintle injector
An injector and needle bolt technology, which is applied in the field of liquid rocket engines and needle bolt injectors, can solve the problems of low reliability, easy damage, affecting the operation of the engine, etc., and achieves low combustion performance, high reliability and good performance. The effect of thermal protection
Active Publication Date: 2022-04-01
NAT UNIV OF DEFENSE TECH
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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.
Method used
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[0025] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.
[0026] The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or ...
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The invention relates to a liquid rocket engine and a pintle injector thereof. A pintle injector, comprising: a pintle, the pintle is provided with an internal flow channel extending along the axial direction of the pintle, and one end of the pintle is a head for extending into the combustion chamber , the head is a concave structure that is depressed to the inside of the pintle, and the deepest part of the head is provided with a through hole communicating with the internal flow channel; and a liquid film forming member, the liquid film forming The component includes a liquid film forming part arranged outside the inner flow channel and opposite to the through hole, and a guide channel is formed between the liquid film forming part and the outer wall of the head, and the guide channel is used for The liquid film is spread on the outer wall of the head centering on the through hole. The above-mentioned liquid rocket engine and its pintle injector have the characteristics 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...
Claims
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IPC IPC(8): F02K9/52
CPCF02K9/52
Inventor 成鹏梁涛白晓曹鹏进张彬李清廉吴继平张家奇
Owner NAT UNIV OF DEFENSE TECH