沿垂直壁面气-液降膜流动传质过程的数值研究  

Numerical Simulation of the Mass Transfer in Gas-Liquid Falling Film Flow on the Vertical Plate

作　　者：刘国兵[1] 惠宇[1] 王玉璋[1] 

机构地区：[1]上海交通大学机械与动力工程学院,动力机械与工程教育部重点实验室,上海200240

出　　处：《燃气轮机技术》2012年第3期34-39,共6页Gas Turbine Technology

基　　金：国家重点基础研究发展规划基金项目(973计划)(2007CB210102)

摘　　要：在考虑气-液两相间质量源项和能量源项的条件下,基于VOF算法,建立了水和空气沿竖直平板壁面两相降膜流动传热传质的CFD模型。利用该模型研究了水和空气两相间的传质特性,分析了液膜波动、进气进液速度以及温度对传质的影响,计算结果表明:一定程度的液膜波动、进气速度和进液速度的提高、气-液之间的温差的增加,都能强化气-液之间的传质过程。By considering the mass-transfer source term and the heat-transfer source term in gas-liquid two-phase flow, a computational model based on the Volume of fluid（VOF） algorithm was established to describe the mass transfer of two-phase （air-water） falling film on a vertical plate. The model was used to analyze the influence of fluctuation, inner liquid velocity and inner gas velocity, inner liquid temperature on the mass transfer in water-air two phase flow. The results indicated that the film fluctuation, higher inner water and air velocity, higher inner water temperature can enhance the mass transfer in water-air falling film on a vertical plate.

关 键 词：降膜 传质 气-液两相流 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]