摘要
针对国内外有关低温冷凝过程的理论研究、实验研究以及数值模拟等进行了系统的综述。首先介绍了不同液膜流态下冷凝换热情况;其次对氮、氧、氢以及氦这几种低温流体已有的冷凝换热实验进行了总结;最后总结了目前数值计算中常用的气液相界面捕捉模型以及由于冷凝所产生的质量与能量源项的处理方式等。发现已有的冷凝传热关联式与氮、氧的冷凝实验结果吻合较好,而与氢、氦的冷凝实验结果存在一定偏差;低温冷凝实验测量误差相对更高温度冷凝较大,且难以维持与外界环境没有热质交换的低温条件,因此实验方法有待于进一步完善化;冷凝数值计算最常用的Lee模型中的冷凝频率仍很难定量化。以上综述结果为后续进一步的研究提供了参考。
In this paper,a review of the theoretical study,experimental investigation and numerical simulation of the cryogenic condensation process was systematically presented.Firstly,the condensation heat transfer under different liquid film flow patterns was presented.Secondly,the existing condensation heat transfer experiments on cryogenic fluids such as nitrogen,oxygen,hydrogen and helium were summarized.In the last,the commonly used gas-liquid interface capture models and the methods for dealing with the mass and energy source terms due to condensation were summarized.It is found that the existing condensation heat transfer correlations are in good agreement with the experimental results of nitrogen and oxygen,but there is deviation from the experimental results of hydrogen and helium.The measurement error of cryogenic condensation experiments is larger than that of the room-temperature fluid,and it is difficult to maintain the cryogenic condition without heat and mass exchange with the outside environment.So the experimental methods on cryogenic condensation need to be further improved.It is difficult to quantify the condensation frequency in Lee model,which is the most commonly used model in condensation numerical calculation.This review provides information for further research.
作者
吕承勋
张鹏
Lü Chengxun;Zhang Peng(Institute of Refrigeration and Cryogenics,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《低温与超导》
CAS
北大核心
2020年第11期12-17,共6页
Cryogenics and Superconductivity
基金
国家自然科学基金(51976117)资助。
关键词
低温冷凝
传热
数值模拟
不凝性气体
Cryogenic condensation
Heat transfer
Numerical simulation
Non-condensable gas
