CAJ | 학술논문

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。
제출료일충이용량상류Eulerian Wall Film ( EWF)모형화자정의결로량공식상결합래예측양품표면상변행위급액막변화적방법。수선이용자탑건배경실험상개전결로물리실험,병분별기우량상류EWF모형여단상류모형진행방진실험。결과표명,상대우단상류모형,EWF모형인고필료상변과정이능구경가정학지모의양품표면상변행위。연후통과자정의공식계산소득결로량여실측결로량적대비,험증료소제출결로량공식적정학성。최후재모의여실측적온습도곡선이급결로량문합교호적전제하,모의료양품표면액막변화과정,과정중액막정현적형태여물리실험중원위섭상계통포착도적액막형태초보문합。
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.