Abstract
Liquid is overheated and evaporated quickly when it enters into the environment with lower saturation pressure than that corresponding to its initial temperature. This phenomenon is known as the flash evaporation. A natural low-pressure environment and flash evaporation have unique characteristics and superiority in high altitude and outer space. Therefore, flash evaporation is widely used in aerospace. In this paper, spray flash evaporation and jet flash evaporation which are two different forms were introduced. Later, key attentions were paid to applications of flash evaporation in aerospace. For example, the flash evaporation has been used in the thermal control system of an aircraft and the propelling system of a microsatellite and oil supply system of a rocket motor. Finally, the latest progresses in the calculation model and numerical simulation of flash evaporation were elaborated.
Highlights
Liquid will be overheated and thereby evaporated when it enters into the environment with lower saturation pressure than that corresponding to its initial temperature
Chen et al analyzed the influences of ambient pressure, initial diameter, and movement rate of droplets on droplet flash evaporation
D is the mass transfer coefficient. They used water as the working medium and studied the influences of working medium flow on flash evaporation heat transfer according to this model
Summary
Liquid will be overheated and thereby evaporated when it enters into the environment with lower saturation pressure than that corresponding to its initial temperature. Air vehicles often serve in high altitude or outer space These spaces are tough environments with low temperature and low pressure. International Journal of Aerospace Engineering heat management has important significance to electronic devices in air vehicles (2) A microsatellite has characteristics of high functional density, high flexibility, short R&D period, low R&D cost, and distributed combination into “virtual macrosatellite.”. It has become one of three research hotspot and development frontiers in the space technology field at present [13]. How to gain high-quality spray and shorten the ignition time becomes key problems that have to be solved urgently in the rocket motor field
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