化工学报2016，Vol.5Issue(5)：1701-1709,9.DOI:10.11949/j.issn.0438-1157.20151376
组合导向浮阀塔板的CFD模拟及反向流分析
CFD simulation and backflow analysis of combined directed valve tray
刘江琳 1张杰旭 1纪利俊 1陈葵 1武斌 1吴艳阳 1朱家文1
作者信息
- 1. 华东理工大学化工学院,上海 200237
- 折叠
摘要
Abstract
The flow patterns and hydraulics of gas-liquid flow on a commercial scale distillation tray is of great importance in determining the tray efficiency. Based on experimental data, a new correlation of average gas hold-up was fitted and built in the inter-phase momentum transfer source for CFD simulations. The simulations of combined directed valve trays of 1.2 m air-water system were carried out by Fluent, a commercial CFD software, and the flow pattern characteristics was investigated. The clear liquid height determined from CFD simulations was in good agreement with the predicted results calculated from the correlation in this work, which proved the validity of simulations. Non-ideal flow of liquid phase on the trays was quantified by the backflow volume ratioT, the ratio of backflow volume to total grid volume. The time-averaged values of the backflow volume ratio (Tav) of 3 tray patterns with different arrangements of trapezoidal and rectangular directed valves were calculated respectively. The results showed that the different arrangements of two kinds of valves had remarkable influence on volume fraction of backflow. By reasonable arrangement,Tav could reduce from 22.0% to 19.4% with the decreased backflow volume by 11.8% compared to the industrial tray. This study was expected to provide a guidance for the tray design and optimization.关键词
气液两相流/计算流体力学/组合导向浮阀/反向流/优化Key words
gas-liquid flow/CFD/combined directed valve tray/backflow/optimization分类
化学化工引用本文复制引用
刘江琳,张杰旭,纪利俊,陈葵,武斌,吴艳阳,朱家文..组合导向浮阀塔板的CFD模拟及反向流分析[J].化工学报,2016,5(5):1701-1709,9.
