摘要
采用狭通道液泛理论模型进行填料塔内液泛研究,估算了液泛点的气液速度。以两种波纹填料及一种新型垂直板规整填料为研究对象考察填料塔内液泛,将实验测得的泛点气液速度与单通道液泛模型预测值进行比较,发现Wallis模型能够较好地预测波纹填料的液泛特性,与实验值的平均相对偏差仅为-10.06%;而Drosos模型能够较好地预测垂直板规整填料液泛点,与实验值平均相对偏差仅为-4.09%。此外,采用数值模拟方法进行了液泛触发及传播过程的捕捉,结果显示液膜波动行为是引发填料层液泛的主要原因。
A method for the estimation of gas-liquid velocities at the flood point in a packed column, based on the models of flooding investigations in a narrow channel, was introduced herein. Experiments were conducted by using two structured corrugated packings and a novel vertical-sheet packing. Experimental results show that the Wallis-type model can effectively describe the flooding characteristics of the two corrugated packings, and the average relative deviation between experimental results and the calculated data by the model is --10.06%, while the Drosos-type model can accurately predict the gas- liquid velocities at the flooding point in a packed column with an average relative deviation of --4.09%. In addition, in order to identify the onset of flooding as well as flooding spread process in a packed column, numerical experiments using volume of fluid method was employed. The results show that the onset of flooding is mainly triggered by the film wavy behavior.
出处
《华东理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第1期1-8,共8页
Journal of East China University of Science and Technology
关键词
填料塔
液泛
两相流
下降液膜
packed column
flooding
two-phase flow
falling liquid film
