Marangoni珠状凝结液珠半径分布的研究  

THE RESEARCH ON DROP RADIUS DISTRIBUTION OF MARANGONI DROPWISE CONDENSATION

作　　者：胡申华[1] 严俊杰[2] 

机构地区：[1]新疆大学电气工程学院热能动力系,新疆乌鲁木齐830047 [2]西安交通大学动力工程与多相流国家重点实验室,陕西西安710049

出　　处：《工程热物理学报》2011年第2期230-232,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50966003);新疆大学博士启动基金资助项目(No.BS090147)

摘　　要：以水-酒精混合蒸汽在斜块上的Marangoni凝结实验图片为基础,统计分析了不同浓度和过冷度下凝结液珠的半径数目比例分布、平均半径及半径偏差。研究发现:在不同浓度和过冷度下,凝结液珠的半径大部分集中在0.1 mm～0.3 mm半径范围内,占到液滴总数的80%;凝结液珠平均半径随过冷度的增大而增大,随浓度的增大而减小;半径偏差最大值所对应的过冷度与该工况下凝结换热特性曲线上传热系数最大时所对应的过冷度大致相同。Radius size distribution, average radius and radius deviation was analyzed based on experimental photograph, these experimental photos were recorded in water-ethanol mixture vapors condensation on an oblique surface under different concentration and subeooling. The investigation showed that maximum value of radius number of condensation drop was within the range of 0.1 mm and 0.3 mm under different concentration and subcooling, occupied by 80% of total condensation drops. The average radius increased with increasing subcooling and decreased with increasing concentration. The snbcooling, which corresponded to the peak of radius deviation, approximated to the snbcooling of the maximum heat transfer coefficient in condensation characteristic curve.

关 键 词：凝结换热 MARANGONI凝结 液珠分布 

分 类 号：TK123[动力工程及工程热物理—工程热物理]