System and method for droplet generation, evaporability observation and wall collision test in low boiling point high volatile medium and normal pressure environment

Abstract

The invention discloses an ordinary pressure environment liquid droplet generation, evaporative observation and wall-impingement test system and method of a medium with low boiling point and high volatility. The system comprises a sealed liquid droplet generation device, a cooling device, a pressure control device, and an information collection and processing device; the devices are connected through pipelines; the liquid form of the medium with low boiling point and high volatility is maintained through a low-temperature environment designed by the platform, and the single liquid droplet is generated under the ordinary pressure environment, the operation environment in the actual laser surgery spray-cooling and like spray-cooling ways is maximally simulated, and the operation environmentmore conforms to the actual condition; the evaporation characteristic in the dropping process of the single liquid droplet under the ordinary temperature and pressure environment can be researched, thereby mastering the dropping characteristic of the actual liquid droplet preferably, and providing reference data for the numerical value simulation of the spray-cooling; the dynamic characteristics of impacting a solid flatbed by the single droplet can be accurately analyzed, and the impact mechanism by impacting the heated surface by the liquid spray-cooling liquid droplet can be deeply mastered.

Description

technical field [0001] The invention belongs to the field of evaporative observation and wall collision test system in the process of droplet generation and dripping, and specifically relates to a droplet generation, evaporability observation and wall collision test system for low boiling point and high volatility medium under normal pressure environment and method. Background technique [0002] The phenomenon of evaporation and wall collision during the flight of spray droplets widely exists in the technical fields of spray combustion, spray cooling, spray drying and inkjet printing. Among them, spray cooling refers to the continuous liquid working medium, which is atomized into fine droplets through the nozzle by means of high-pressure gas or its own pressure, and then sprayed onto the surface of the heated component, and the heat is taken away by the single-phase or two-phase heat exchange mechanism. Strong capacity, small heat transfer temperature difference, small circ...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a low boiling point high volatility medium droplet generation, evaporative observation and wall collision test system and method, which are used to solve the problem of low boiling point high volatility liquid being easily volatile under normal pressure environment, high pressure The equipment requirements are high in the environment, and it is difficult to realize the research on droplet generation, evaporative observation and wall collision of low boiling point and high volatile medium in normal pressure environment

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