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Combined type compact acoustic cavity structure of liquid rocket engine

A liquid rocket and engine technology, applied in rocket engine devices, machines/engines, mechanical equipment, etc., can solve problems such as destroying the working stability of the engine, burning the engine, etc., to improve the ability to resist unstable combustion, and has strong technical scalability. Effect

Active Publication Date: 2019-07-05
SHANGHAI INST OF SPACE PROPULSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unstable combustion will destroy the working stability of the engine, especially high-frequency unstable combustion will cause the engine to burn out instantly

Method used

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  • Combined type compact acoustic cavity structure of liquid rocket engine
  • Combined type compact acoustic cavity structure of liquid rocket engine
  • Combined type compact acoustic cavity structure of liquid rocket engine

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Embodiment Construction

[0013] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0014] figure 2 It is the structural diagram of the acoustic cavity of the present invention. The example of the present invention is a double component 250N thrust chamber, which has a head 1 and a body 2.

[0015] What this example embodiment adopts is dinitrogen tetroxide as oxidant, and monomethylhydrazine is as fuel. The two propellant components organize the distribution of the propellant through the nozzle, atomization, mixing, vaporization and combustion in the combustion chamber. The acoustic cavity structure is also suitable for engines such as MON-1 / MON-3 as oxidizers and hydrazine, unsymmetrical dimethylhydrazine, etc. as fuels.

[0016] The thrust chamber of the embodiment of the present invention is made of refractory metal material, the head material is TC4 titanium alloy, the body material is niobium-tungsten alloy...

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Abstract

The invention relates to technology for suppressing unstable combustion of a medium and small thrust attitude and orbit control engine for a spacecraft propulsion system, and provides a medium and small thrust space attitude and orbit control liquid rocket engine acoustic cavity structure. The problem of insufficient proportion of acoustic cavity area caused by compact space is solved, a combustion backflow region caused by the acoustic cavity structure is reduced, and the capability of the engine to resist unstable combustion is improved. The invention provides a combined type compact acoustic cavity structure of a liquid rocket engine, and a straight hole in a head and a skewed slot in a body are adopted to form the acoustic cavity structure, wherein the acoustic cavity structure is positioned at the butt joint of the head and the body. The specific structural form of the acoustic cavity structure is determined through calculation and tests aiming at different engines to ensure thatthe capability of the engine to resist unstable combustion can be effectively improved. The acoustic cavity structure is suitable for the metal material engines, and can further be used for C / SiC composite materials or C / C composite material engines.

Description

technical field [0001] The invention relates to a technology for suppressing unstable combustion of a small-and-medium-thrust attitude-orbit control engine used in a spacecraft propulsion system, in particular to a combined compact acoustic cavity structure of a liquid rocket engine. Background technique [0002] The engine is the heart of launch vehicles, satellites and other spacecraft, and the thrust chamber is the core component of the rocket engine. In order to improve engine performance, it is necessary to increase the combustion efficiency in the thrust chamber, but high combustion efficiency is usually accompanied by unstable combustion. Unstable combustion will destroy the working stability of the engine, especially high-frequency unstable combustion will cause the engine to burn out instantly. [0003] Space attitude and orbit control liquid rocket engines usually use acoustic chambers to suppress the occurrence of unstable combustion. The acoustic cavity is usua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K9/62
CPCF02K9/62
Inventor 刘昌国陈泓宇赵婷唐梅叶超
Owner SHANGHAI INST OF SPACE PROPULSION