为分析电晕离子风除湿的机理，探究不同电压下等离子场与流场的分布以及影响收水效果的因素，利用COMSOL软件进行数值模拟，计算了电除雾器一维等离子场，得到了电子与离子的分布规律和空间电荷密度；通过附加体积力的方法，计算了不同条件下离子风的分布情况和变化规律；选取内置层流混合物模型进行两相流模拟，分析电场对电除雾器收集液滴的效果。研究表明：阳离子大量集中在电晕极附近，而阴离子则充满电晕外区，使得电除雾器内大部分区域充满了负电荷；由于阴离子受电场力而形成的离子风，在电除雾器内将空气吹卷至筒壁，而且随着电势差的增大，空间电荷密度越大，离子风速度越大。通过对比施加电场前后除雾器出口液滴浓度，发现离子风使得出口水汽量减少近25.8%，验证了电晕离子风除湿的可行性。

This paper conducts a series of numerical simulations with software COMSOL,in order to analyze the mechanism of corona ion wind dehumidification,and explore the distributions of plasma and flow field under different electric field and the factors that influence the effects of water collection.The distributions of electron and ions and space charge density are evaluated by simulating 1D plasma field in EMC unit.The characteristics of ionic wind are obtained by the method of adding volume force to NS equation.Two phase model is selected to analyze the effect of electric field on droplet gathering.The results show that large amounts of positive ions are concentrated near the cathode,however,negative ions fill almost the whole computational domain,which makes EMC unit full of negative charge.Because of ionic wind generated by anions,air in the domain is blown towards the cylinder wall.With the increase of potential difference,both charge density and ionic wind velocity increase.By comparing the droplet concentration at the outlet before and after exerting the electric filed,it is found that water there is reduced by 25.8%,which verifies the feasibility of ionic wind dehumidification.

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国家自然科学基金（51576059）；沧州高新区博士后工作经费资助项目