摘要
横管降膜流动过程中,液膜速度和温度及其分布是影响传热传质的关键因素,由于实验研究方法的局限性,实验研究结果一般只是液膜内各参数的平均值,而液膜内部的速度和温度具体分布特性却很难得到。借助FLUENT软件,利用VOF模型研究了橫管外液膜速度和温度及其分布特性。通过建立三维数理模型,模拟研究了常温常压下,橫管外液膜无相变条件下横管液膜的传热过程,并从边界层的角度解释了液膜波动对传热过程的影响。
Thevelocityandtemperature of the liquid film is the key parameters for heat and mass transfer in horizontal tube falling film. Due to the limitations of the experimental methods, the experimental results only show the average velocity and temperature rather than the distribution of the velocity and temperatureinthe film. The heat transfer process of the horizontal tube falling film is simulated without phase transition in the condition of normal temperature and pressure with Fluent software using the VOF model. Besides, the effects of film fluctuationon the heat transfer processare analyzed from the view of boundary layertheory.
作者
邱庆刚
孟垂举
张琨
沈胜强
QIU Qing-gang;MENG Chui-ju;ZHANG Kun;SHEN Sheng-qiang(School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China;School of Ocean and Civil Engineering, Dalian Ocean University, Dalian 116024, China)
出处
《热科学与技术》
CAS
CSCD
北大核心
2018年第2期111-117,共7页
Journal of Thermal Science and Technology
基金
国家自然科学基金重点资助项目(51336001)
关键词
横管降膜流动
速度与温度分布
传热过程
边界层
horizontal tube
velocitydistribution
temperaturedistribution
heat transfer
boundary layer
