水–酒精混合工质Marangoni凝结液珠表面温度随液珠尺寸变化研究  

Study on Surface Temperature Distribution of Condensate Droplets With Droplet Size in Marangoni Condensation for Ethanol-water Mixtures

作　　者：张贵龙 马自强 李恒[1] 王进仕[1] 严俊杰[1] ZHANG Gui-Long;MA Zi-Qiang;LI Heng;WANG Jin-Shi;YAN Jun-Jie(State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《工程热物理学报》2021年第10期2581-2586,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51876171);陕西省自然科学基础研究计划项目(No.2018JM5157)。

摘　　要：基于红外测温技术,开展了水平表面水–酒精混合工质Marangoni凝结实验,研究了液珠表面温度随液珠尺寸的变化规律,分析了射流水温、酒精蒸气质量浓度及蒸气压力等因素的影响。研究发现:液珠表面平均温度随液珠半径的增大而增大,并且同一工况下具有良好的相关性。当射流水温升高时,液珠表面温度分布曲线朝着更小半径和更高温度方向移动。当酒精蒸气质量浓度从0.5%增大到10%时,液珠表面平均温度整体下降约4.5℃。随着蒸气压力增大,表面温度分布向着更高温度及更大半径方向发展。In this paper,the experiments of Marangoni condensation for ethanol-water mixtures on a horizontal surface were carried out based on thermal infrared images.The distribution law of the droplet surface temperature with the droplet size was studied,and the effects of the impinging cooling water temperature,the ethanol vapor concentration and the vapor pressure on the distribution law were analyzed.It was found that the average surface temperature of the droplets increased with the droplet radius,and there was a good correlation between them under the same working conditions.When the impinging cooling water temperature increased,the surface temperature distribution curve of the droplets moved toward smaller radius and higher temperature.When the ethanol vapor concentration increased from 0.5%to 10%,the average surface temperature of the droplets decreased by about 4.5℃.As the vapor pressure increased,the surface temperature distribution curve tended to larger radius and higher temperature.

关 键 词：MARANGONI凝结 红外测温 温度分布 液珠尺寸 

分 类 号：TK121[动力工程及工程热物理—工程热物理]