摘要
液滴蒸发是最基础、最广泛、最重要的物理过程之一,但蒸发液滴动态过程的气相浓度表征极具挑战性。本文采用激光全息干涉技术,获得了乙醇–水双组分液滴蒸发过程中的气相浓度分布,并对丙二醇–水双组分液滴系统聚并现象进行观测。结果表明,不同组分液滴的蒸发速率和气相浓度场显著不同,且浓度梯度是驱动双组分液滴自发聚并运动的关键因素。本文提出了液滴蒸发特性表征的新思路,可为探索更加复杂的多组分液滴行为提供参考。
Droplet evaporation is one of the most ubiquitous,fundamental and important physical processes,while direct experimental observation of the dynamic gas-phase species concentration field remains a long-standing challenge.In this study,the laser holographic interference method was adopted to probe the gas-phase concentration field around the evaporating binary ethanol-water droplets,and to inspect the agglomeration process of the glycol-water droplets.It has been found that the evaporation rate and the gas-phase concentration field varied by the components of droplets significantly,and the resulting concentration gradient is the main cause for the spontaneous agglomeration of the binary droplets.This work provides a new way to probe the transient evaporation characteristics of droplet systems for this time,and thus opens up new possibilities to explore more complex behavior of the multi-component droplet systems.
作者
刘城庆
吴君军
朱恂
廖强
LIU Chengqing;WU Junjun;ZHU Xun;LIAO Qiang(Institute of Engineering Thermophysics,School of Energy and Power Engineering,Chongqing University,Chongqing 400030,China;Key Laboratory of Low-Grade Energy Utilization Technologies&Systems,MOE,Chongqing University,Chongqing 400030,China)
出处
《工程热物理学报》
北大核心
2026年第1期284-291,共8页
Journal of Engineering Thermophysics
基金
国家自然基金委创新群体(No.52021004)
国家自然科学基金(No.52206070)。
关键词
全息干涉
液滴蒸发
浓度场
液滴聚并
热工测量
holographic interferometry
droplet evaporation
concentration field
droplet coalescence
thermal measurement
