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为了深入研究空间环境下液体工质的喷射雾化特性,搭建了空间环境模拟实验系统,综合研究了真空环境下饱和蒸汽压、喷嘴直径、雷诺数和溶气等对液体射流雾化特性的影响。试验结果表明:闪蒸是真空环境下射流雾化的主要因素,射流雾化过程中闪蒸强度主要由工质饱和蒸汽压决定;喷嘴直径主要通过三方面的影响对射流雾化起作用:流动状态、湍流强度和气泡生长周期;雷诺数对真空雾化的影响主要涵盖以下三点:出口速度、流动状态和闪蒸过程;溶气对射流雾化有明显的影响作用,影响途径是通过气泡的不稳定生长和微爆作用。
In order to further study the spray atomization characteristics of liquid working fluid in space environment, an experimental system of space environment simulation was set up to study the influence of saturated vapor pressure, nozzle diameter, Reynolds number and dissolved gas on the atomization characteristics of liquid jet . The experimental results show that flash evaporation is the main factor of jet atomization in vacuum environment. The flash intensity during jet atomization is mainly determined by the saturated vapor pressure of the working fluid. The nozzle diameter mainly affects jet atomization through three aspects: flow State, turbulence intensity and bubble growth cycle. The influence of Reynolds number on vacuum atomization mainly covers the following three points: exit velocity, flow state and flashing process; dissolved gas has a significant effect on jet atomization through the influence of bubbles The unstable growth and micro-explosion effect.