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

发布时间：2018-06-20 00:37

本文选题：大气腐蚀 + 相变　；参考：《工程科学学报》2015年06期

【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.
[Abstract]:A method is proposed to predict the surface phase change behavior and the change of liquid film by combining the two phase flow Eulerian Wall Film (EWF) model with the custom condensation formula. First, the physical experiment of condensation is carried out by using the self built environment experiment box, and the simulation experiments are carried out on the basis of the two-phase flow EWF model and the single-phase flow model respectively. The results show that the simulation experiment is carried out on the basis of the two-phase flow EWF model and the single phase flow model respectively. Compared with the single phase flow model, the EWF model can more accurately simulate the phase transition behavior of the sample surface due to the consideration of the phase change process. Then, a custom formula is used to calculate the condensation amount and the measured condensation. The correctness of the formula is verified. Finally, the simulation and the measured temperature and humidity curves and the condensation amount are consistent. On the premise of good condition, the change process of the liquid film on the surface of the sample is simulated. The form of the liquid film in the process is in agreement with the form of the liquid film captured by the camera system in the physical experiment.
【作者单位】：北京科技大学国家材料服役安全科学中心;
【基金】：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)
【分类号】：TG172

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