含有非凝性气体的蒸汽凝结数值模拟研究  

Numerical Simulation Study on Steam Condensation in Presence of Non-condensable Gas

作　　者：马喜振 贾海军[1] 刘洋[1] 吴磊[1] 

机构地区：[1]清华大学核能与新能源技术研究院,北京100084

出　　处：《原子能科学技术》2015年第B05期265-269,共5页Atomic Energy Science and Technology

基　　金：高等学校博士学科点专项科研基金资助项目(20130002120016)

摘　　要：非凝性气体对蒸汽的凝结过程有明显影响,导致凝结流量减小,进而导致凝结传热系数降低。本文采用CFD方法模拟含有非凝性气体的蒸汽凝结,并与现有实验数据进行比较。结果表明CFD数值计算结果精度较好,证明了用多相流模型的方法处理非凝性气体影响凝结问题的可行性。本文还讨论了蒸汽分压、非凝性气体的质量浓度等对蒸汽凝结过程中传热系数的影响及凝结过程对温度场、速度场分布的影响。The non-condensable gases have an important effect on steam condensation. The condensation mass flow rate and the condensation heat transfer coefficient will decrease dramatically in the presence of non-condensable gases. The steam condensation was simulated by CFD code with the multiphase flow model in this paper. The simulation results were compared with the current experimental data. The results show that the calculation result accuracy by CFD code is good and the multiphase flow model is proved to be useful for the simulation of steam condensation in the presence of non-condensable gas. The influences of several factors such as steam partial pressure and mass fraction of non-condensable gas on heat transfer coefficient were discussed and the distributions of temperature and velocity in the tube were also presented.

关 键 词：非凝性气体 CFD 凝结 多相流模型 

分 类 号：TK124[动力工程及工程热物理—工程热物理]