Space engine jet pipe and spacecraft

Abstract

The invention provides a space engine jet pipe and a spacecraft. The space engine jet pipe comprises a niobium alloy base material, anti-oxidation silicide coatings and an infrared stealth coating. The engine jet pipe comprises a laval jet pipe shaped thin-wall revolving body made of a niobium alloy base material. The anti-oxidant silicide coatings are sprayed on the inner surface and the outer surface of the niobium alloy base material; an infrared stealth coating preparation area is located on the outer wall of the expansion end of the engine jet pipe, and the infrared stealth coating comprises a matching layer, a bonding layer and a low-emissivity layer; the matching layer is prepared on the anti-oxidation silicide coating on the outer surface of the niobium alloy base material, the bonding layer is prepared on the matching layer, and the low-emissivity layer is prepared on the bonding layer. Infrared stealth is achieved in the area, not attached with the infrared stealth coating, of the engine jet pipe in a structural shielding mode. By preparing the infrared stealth coating, the infrared emissivity of the outer surface of the jet pipe can be reduced, and therefore the infrared stealth capacity of the space engine jet pipe can be remarkably improved.

Description

technical field [0001] The invention relates to the technical field of spacecraft propulsion systems, in particular to a space engine nozzle and a space vehicle. Background technique [0002] Space engines provide power for space vehicles to change orbits and adjust attitudes, and are widely used in weapons, satellites, spacecraft and other fields. The nozzle is the core component of the space engine, which converts the heat energy of the high-temperature gas in the combustion chamber into kinetic energy to make the engine generate thrust. [0003] With the rapid development of infrared detection technology, infrared detection has become one of the important means of battlefield situation awareness for advanced weapons, which has gradually attracted the attention of various military powers, and related technologies have also developed rapidly. The temperature of the nozzle of space weapons is the highest, and the infrared exposure symptoms are the most obvious, and the thre...

AI Technical Summary

Problems solved by technology

[0006] The inventor believes that the common nozzle structure is that the inner and outer surfaces of the niobium alloy substrate are sprayed with an anti-oxidation silicide coating. When the space engine is working, the temperature of the gas inside the nozzle exceeds 3000°C, and the highest temperature on the outer surface of the nozzle can reach 1400°C, or even Higher, without infrared stealth function

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