静态闪蒸过程中的单个汽泡成长实验研究  

Experimental Study on Bubble Growth of Sodium Chloride Aqueous Solution in Static Flash Evaporation

作　　者：于龙文[1] 张丹[1] 赵凯[1] 严俊杰[1] 赵冰超[1] 

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》2015年第6期1274-1277,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51306148;No.51125027);中央高校基本科研业务费专项资金

摘　　要：本文设计搭建了静态闪蒸实验台,对NaCl溶液静态闪蒸过程中的汽泡成长进行了可视化实验研究。实验中,液膜初始浓度为0~0.2,初始温度93~96℃,真空腔初始压力0.01~0.03 MPa。结果表明:真空腔初始压力的降低,对汽泡相对半径的变化率起到促进作用。NaCl溶液中汽泡相对半径的变化较纯水中更加快速,但在不同浓度的溶液中这一变化并不明显。同时建立了物理模型,并对该模型进行了数值计算,得到数值解。所得的计算值基本与实验值相趋势基本一致但还有待改进。An experimental study on bubble growth in static flash evaporation of aqueous NaCl solution was present.Experiments were carried out with initial waterfilm concentration varied from 0to 0.2,initial waterfilm temperature from 93 to 96℃,and initial pressure of vacuum tank from 0.01 to 0.03 MPa.Results indicated that the decrease of initial pressure in vacuum tank will promote the growth of the bubble radius relatively.In Sodium chloride aqueous solution,the relative growth rate of bubble radius is quicker than that in pure water.However,different concentrations of Sodium chloride aqueous solution seem not affect the growth rate.In the article,the author establish a physical model and get the numerical solution.The numerical solution basically matches the experimental results but should still be improved.

关 键 词：NACL溶液 静态闪蒸 汽泡相对半径变化 

分 类 号：TK124[动力工程及工程热物理—工程热物理]