Anti-solidification heat exchanger

Abstract

The invention provides an anti-solidification heat exchanger. The anti-solidification heat exchanger comprises a first end socket, an evaporation section, a heating section, a heat exchange section, asecond end socket and a liquid hydrogen guide pipe which are sequentially connected, wall type heat exchange channels used for liquid working medium distribution are formed in the inner walls of thefirst end socket, the evaporation section, the heating section, the heat exchange section and the second end socket, and the wall type heat exchange channels communicate with one another. According tothe anti-solidification heat exchanger, different heat exchanger structures are adopted in different sections, and condensation of the liquid working medium in an ultralow-temperature heat exchangercan be prevented.

Description

Technical field [0001] The present disclosure relates to the field of aerospace heat exchangers, in particular to a heat exchanger that prevents solidification. Background technique [0002] For the future military and civilian hypersonic aircraft, the aerodynamic heating effect causes a huge thermal load on the entire outer surface of the aircraft. If flying at Ma5 speed, the surface temperature is as high as 1300K; while flying at Ma6 speed, the surface temperature is as high as 2000K, far exceeding the temperature resistance limit of existing superalloy materials. Therefore, it is necessary to cool all the outer surfaces of the aircraft, the cockpit and other positions; if the air-breathing engine is used, the air at the engine inlet also needs to be cooled. [0003] In the airborne environment, the best cold source is the liquid hydrogen fuel carried by the aircraft, so that you will not be burdened with other cold sources. Liquid hydrogen has a great ability to absorb heat, ...

AI Technical Summary

Problems solved by technology

[0005] When the liquid working medium exchanges heat with liquid hydrogen, the temperature of liquid hydrogen is extremely low, the flow rate is small, and the specific heat capacity is large. The flow rate of the liquid working medium is large and the specific heat capacity is relatively small. In the heat exchanger, the liquid working medium is prone to local low temperature and condensation , block the flow path, thereby threatening the safety of the entire aircraft system

[0006] Chinese invention publication CN108106484A uses electric heating to prevent solidification in low-temperature heat exchangers, which is not suitable for airborne environments

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