空气隙膜蒸馏系统膜面处流场特性研究  

Research on the flow field characteristics of membrane surface in air gap membrane distillation system

作　　者：韩丽宁 陈永艳[1] 田瑞[1] 蔚蕾 

机构地区：[1]内蒙古工业大学能源与动力工程学院,呼和浩特010051 [2]北奔重汽集团研发中心,包头014020

出　　处：《膜科学与技术》2015年第3期31-36,共6页Membrane Science and Technology

基　　金：内蒙古自治区自然科学基金项目(2011MS0711);国家自然科学基金资助项目(51266007)

摘　　要：利用高频PIV系统独有的高频特性,对空气隙膜蒸馏系统膜面处瞬态流场和湍流场进行了研究.由瞬态流场得到膜面附近流场中心涡从开始产生到变大再到逐渐消失的变化规律,对不同入流速度下膜面附近流场的湍流强度进行对比,得到膜面附近的瞬态流场和湍流强度随入流速度的变化趋势,为进一步研究空气隙膜蒸馏系统奠定了一定的数据和理论基础.Air gap membrane distillation system is an efficient distillation technology. The characteristics of membrane surface flow field is very important for improving the heat transfer and mass transfer efficiency of the air gap membrane distillation system. The transient flow field and turbulence field at the membrane surface were studied with high frequency PIV system. The transient flow field showed the changes of the vortex from the generation to disappear. Turbulence intensity of the flow field near the membrane surface was compared under different inflow velocity and the change trends of the transient flow and turbulence intensity near the membrane surface with different inflow velocity were obtained. This article provided some data and theoretical foundation for further study of air gap membrane distillation system.

关 键 词：空气隙膜蒸馏 高频PIV 瞬态流场 

分 类 号：TQ051.893[化学工程]