工程科学学报，第37卷，第6期：721-730,2015年6月 Chinese Journal of Engineering,Vol.37,No.6:721-730,June 2015 D0l:10.13374/j.issn2095-9389.2015.06.007:http://journals.ustb.edu.cn 基于两相流EF模型的样品表面相变行为及液膜变 化的CFD预测 陈 洁，时鹏，文磊，闫松涛，曹宗宝，金莹四 北京科技大学国家材料服役安全科学中心，北京100083 ☒通信作者，E-mail:yjin@ustb.cd血.cm 摘要提出了一种利用两相流Eulerian Wall Film(EWF)模型和自定义结露量公式相结合米预测样品表面相变行为及液 膜变化的方法.首先利用自搭建环境实验箱开展结露物理实验，并分别基于两相流EW℉模型与单相流模型进行仿真实验 结果表明，相对于单相流模型，EW下模型因考虑了相变过程而能够更加精确地模拟样品表面相变行为.然后通过自定义公式 计算所得结露量与实测结露量的对比，验证了所提出结露量公式的正确性.最后在模拟与实测的温湿度曲线以及结露量吻 合较好的前提下，模拟了样品表面液膜变化过程，过程中液膜呈现的形态与物理实验中原位摄像系统捕捉到的液膜形态初步 吻合， 关键词大气腐蚀：相变：液膜：二相流：数值模拟：计算流体动力学(CFD) 分类号TG174 CFD prediction of phase change behavior and liquid film evolution on specimens based on the Eulerian wall film model of two-phase flow CHEN Jie,SHI Peng,WEN Lei,YAN Song-tao,CAO Zong-bao,JIN Ying National Center for Materials Service Safety,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:yjin@ustb.edu.cn ABSTRACT A method was presented to predict phase change behavior and liquid film evolution on specimens by combining the Eulerian wall film (EWF)model of two-phase flow with the self-defined formula of dew amount.Firstly,a self-built environmental test chamber was used to carry out condensation physical tests,and simulated tests were respectively performed based on the EWF model and the single-phase flow model.It is found that the EWF model is more accurate than the single-phase flow model due to necessary consideration of the phase change process.Then,a self-defined formula was established to calculate the dew amount and it was verified by the physical tests.Finally,under the premise that simulated and tested temperatures,relatively humidity curves and dew amounts show good agreement,the changing process of liquid films on specimen surfaces was predicted,and the simulation prediction of liquid film shape on specimen surfaces is in consistent with in-situ video imaging morphology during the physical tests. KEY WORDS atmospheric corrosion;phase change:liquid films:two-phase flow:numerical simulation:computational fluid dynamics (CFD) 统计表明，金属的大气腐蚀造成的经济损失占金 属表面的温度低于其存放环境的空气露点温度，金属 属总损失量的50%以上四.在潮湿的空气中，如果金 的表面就会出现结露现象.结露是影响表面润湿时间 收稿日期：2014-07-29 基金项目：教育部新世纪优秀人才支持计划资助项目(NCET一10O224)：中央高校基本科研业务费资助项目(FRF-TP-10O05B：“重大工 程材料服役安全研究评价设施”预研资助项目(YYXM-14120001):高等学校学科创新引智计划资助项目(B12012)工程科学学报，第 37 卷，第 6 期:721--730，2015 年 6 月 Chinese Journal of Engineering，Vol． 37，No． 6: 721--730，June 2015 DOI: 10． 13374 /j． issn2095--9389． 2015． 06． 007; http: / /journals． ustb． edu． cn 基于两相流 EWF 模型的样品表面相变行为及液膜变 化的 CFD 预测 陈 洁，时 鹏，文 磊，闫松涛，曹宗宝，金 莹 北京科技大学国家材料服役安全科学中心，北京 100083  通信作者，E-mail: yjin@ ustb． edu． cn 摘 要 提出了一种利用两相流 Eulerian Wall Film (EWF)模型和自定义结露量公式相结合来预测样品表面相变行为及液 膜变化的方法． 首先利用自搭建环境实验箱开展结露物理实验，并分别基于两相流 EWF 模型与单相流模型进行仿真实验． 结果表明，相对于单相流模型，EWF 模型因考虑了相变过程而能够更加精确地模拟样品表面相变行为． 然后通过自定义公式 计算所得结露量与实测结露量的对比，验证了所提出结露量公式的正确性． 最后在模拟与实测的温湿度曲线以及结露量吻 合较好的前提下，模拟了样品表面液膜变化过程，过程中液膜呈现的形态与物理实验中原位摄像系统捕捉到的液膜形态初步 吻合． 关键词 大气腐蚀; 相变; 液膜; 二相流; 数值模拟; 计算流体动力学(CFD) 分类号 TG174 CFD prediction of phase change behavior and liquid film evolution on specimens based on the Eulerian wall film model of two-phase flow CHEN Jie，SHI Peng，WEN Lei，YAN Song-tao，CAO Zong-bao，JIN Ying National Center for Materials Service Safety，University of Science and Technology Beijing，Beijing 100083，China  Corresponding author，E-mail: yjin@ ustb． edu． cn ABSTRACT A method was presented to predict phase change behavior and liquid film evolution on specimens by combining the Eulerian wall film (EWF) model of two-phase flow with the self-defined formula of dew amount． Firstly，a self-built environmental test chamber was used to carry out condensation physical tests，and simulated tests were respectively performed based on the EWF model and the single-phase flow model． It is found that the EWF model is more accurate than the single-phase flow model due to necessary consideration of the phase change process． Then，a self-defined formula was established to calculate the dew amount and it was verified by the physical tests． Finally，under the premise that simulated and tested temperatures，relatively humidity curves and dew amounts show good agreement，the changing process of liquid films on specimen surfaces was predicted，and the simulation prediction of liquid film shape on specimen surfaces is in consistent with in-situ video imaging morphology during the physical tests． KEY WORDS atmospheric corrosion; phase change; liquid films; two-phase flow; numerical simulation; computational fluid dynamics (CFD) 收稿日期: 2014--07--29 基金项目: 教育部新世纪优秀人才支持计划资助项目(NCET--10--0224); 中央高校基本科研业务费资助项目(FRF--TP--10--005B); “重大工 程材料服役安全研究评价设施”预研资助项目(YYXM--1412--0001); 高等学校学科创新引智计划资助项目(B12012) 统计表明，金属的大气腐蚀造成的经济损失占金 属总损失量的 50% 以上［1］． 在潮湿的空气中，如果金 属表面的温度低于其存放环境的空气露点温度，金属 的表面就会出现结露现象． 结露是影响表面润湿时间