Combustion chamber of liquid-propellant rocket engine and inner wall thereof

Abstract

The invention discloses an inner wall of a combustion chamber of a liquid-propellant rocket engine. The outer surface of the inner wall of the combustion chamber is provided with process ring groovesand a groove inner wall; the process ring grooves are located at two ends of the outer surface of the inner wall of the combustion chamber; the groove inner wall is located at the middle of the outersurface of the inner wall of the combustion chamber. The inner wall of the combustion chamber of the liquid-propellant rocket engine can meet the heat protection requirements and thermal life requirements of a modern high-performance large-thrust liquid-propellant rocket engine, can solve the technical problems of diffusion welding applications, and has low cost.

Description

technical field [0001] The invention relates to a combustion inner wall and a combustion chamber of a liquid rocket engine, belonging to the field of liquid rocket engines. Background technique [0002] As an important part of the liquid rocket engine, the combustion chamber has three functions: (1) sending fuel into the head injector through the interlayer of the cooling channel; (2) burning the mixed gas of fuel and oxidant in the combustion chamber to generate high temperature, High-pressure gas, and through a section of truncated Laval nozzle expansion of the combustion chamber to accelerate outward high-speed ejection, thereby generating thrust; (3) regenerative cooling protection itself. As the key part of the combustion chamber, the inner wall of the combustion chamber is used to realize efficient heat exchange between the coolant and the high-temperature gas in the combustion chamber, so that the coolant can take away a certain amount of heat, and protect the combust...

AI Technical Summary

Problems solved by technology

However, the performance of the zirconium oxygen-free copper inner wall commonly used in hydrogen-oxygen engines in my country will drop significantly after diffusion welding, which makes the diffusion welding process unable to be popularized and applied to high-thrust engines; The welding quality of the head is poor and cracks appear in the end during welding. This problem is also one of the biggest problems restricting the wide application of diffusion welding technology at home and abroad in the manufacture of combustion chambers.

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