水平管降膜流动的三维数值模拟  

3-D numerical simulation of horizontal tube falling film flow

作　　者：段林林[1] 高虹[1] 郭玉君[1] 杨晓宏[1] 田瑞[1] DUAN Lin-lin GAO Hong GUO Yu-jun et al(College of Energy and Power Engineering ,Inner Mongolia University of Technology, Hohhot 010051 , China)

机构地区：[1]内蒙古工业大学能源与动力工程学院,内蒙古呼和浩特010051

出　　处：《能源工程》2017年第1期1-4,共4页Energy Engineering

基　　金：国家自然科学基金资助项目(51266007);内蒙古工业大学风能太阳能利用技术省部共建教育部重点实验室开放基金

摘　　要：采用VOF方法对水平管外液体降膜流动进行了三维模拟,研究在绝热情况下单根管外液膜流动随时间的变化特征。分析了管外液膜流动瞬态的5个阶段,即自由下落区、冲击区、发展区、充分发展区和尾流区的特点,以及水平管外稳定液膜厚度分布规律。结果表明,液膜厚度在120°附近最薄,管壁上半部分的液膜厚度要大于管壁下半部分液膜厚度。The theory model of liquid falling fihn flow outside horizontal tube was set up,by using the VOF 3-D numeri- cal sinmlation model under the condition of adiabatic. Characteristies of the transient liquid film flow outside single tube over time were studied. Five stages of liquid film flow transient, free fall area and impact area, development zone, full development area and wake zone, and the steady thickness of liquid fihn distribution over horizontal tube stability, were analyzed. The results showed that, the thinnest liquid film thickness was near 120°, and the liquid film thickness of wall upper part was greater than that of the lower part of tube.

关 键 词：三维模型 液膜流动瞬态 液膜厚度 

分 类 号：TK124[动力工程及工程热物理—工程热物理]