This study investigates the effect of injection gas molar mass on the performance of counterflow atomization, using a novel internal mixing design. At fixed water flow rates and gas/liquid momentum ratios, the counterflow injection gas was systematically varied using air, argon, and helium. Droplet Sauter mean diameter and relative span factor were optically determined to evaluate spray quality, while momentum ratio and gas/liquid mass flow ratio were varied to examine atomizer efficiency. In contrast with previous findings for other twin-fluid nozzle types, gas molar mass in counterflow atomization was found to influence droplet diameter as significantly as gas/liquid mass flow ratio, with lighter gases producing smaller droplets. A preliminary model of counterflow atomization mixing and breakup shows good agreement with the collected data.

中文翻译：

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注入气体摩尔质量对逆流雾化器性能的影响

本研究使用一种新颖的内部混合设计，研究了注入气体摩尔质量对逆流雾化性能的影响。在固定的水流速和气/液动量比下，逆流注入气体使用空气、氩气和氦气系统地变化。光学测定液滴索特平均直径和相对跨度因子以评估喷雾质量，同时改变动量比和气体/液体质量流量比以检查雾化器效率。与之前对其他双流体喷嘴类型的发现相比，发现逆流雾化中的气体摩尔质量对液滴直径的影响与气/液质量流量比一样显着，较轻的气体产生较小的液滴。逆流雾化混合和破碎的初步模型与收集的数据显示出良好的一致性。