摘要
由于气体的搅动,筛孔塔板上的流动是极其复杂的气液两相流。目前两相流理论尚不成熟,未见运用此理论对塔板流速场的研究报道,Zhang和Yu的研究虽考虑了气相对液相流动的影响,但由于利用单相流理论,计算结果与实际情况有较大偏差。本文利用Elghobashi等建立的两相流双流体模型,建立了塔板上气液两相流二维流速场计算模型。在此基础上,通过调整模型参数,考虑了液层高度对塔板上返流区二维流型的影响,建立了模型参数值与液层高度的关系,实现了考虑液层高度影响的二维流动——拟三维流动的模拟。计算结果与Porter的实验结果基本相符。
A two - fluid turbulence model is used to develop a two - dimensional theoretical model for predicting the two - phase flow on a sieve tray. Then the influence of the turbulence of the third dimension on the two - dimensional flow pattern is considered by correlating the constants of the model to the height of the overflow weir. Comparison of the computed results with the experiments of the sieve tray shows that the proposed model can successfully simulate the velocity field on the tray.
出处
《化工学报》
EI
CAS
CSCD
北大核心
1995年第4期511-515,共5页
CIESC Journal
关键词
筛孔塔板
气液两相流
双流体模型
速度场模拟
sieve tray , gas - liquid two - phase flow , pseudo - three - dimension simulation, two - fluid turbulence model
