基于LB方法的管内流动沸腾传热模拟  

Numerical Study of Heat Transfer on Flow Boiling in Vertical Tube by LB Method Simulation

作　　者：孙挺臻 刘倩 桂南 杨星团 屠基元 孔海志 姜胜耀 SUN Tingzhen;LIU Qian;GUI Nan;YANG Xingtuan;TU Jiyuan;KONG Haizhi;JIANG Shengyao(Institute of Nuclear and New Energy Technology, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Tsinghua University, Beijing 100084, China;Royal Melbourne Institute of Technology University, Victoria 3083, Australia;China Nuclear Power Technology Research Institute, Shenzhen 518026, China)

机构地区：[1]清华大学核能与新能源技术研究院,先进核能技术协同创新中心先进反应堆工程与安全教育部重点实验室,北京100084 [2]墨尔本皇家理工大学,澳大利亚维多利亚3083 [3]中广核研究院有限公司,广东深圳518026

出　　处：《原子能科学技术》2018年第5期776-781,共6页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(51576211);国家自然科学基金创新研究群体科学基金资助项目(51321002); 国家高技术研究发展计划资助项目(2014AA052701); 全国优秀博士学位论文作者专项资金资助项目(201438)

摘　　要：为研究竖直管内流动沸腾的传热情况及气泡行为学,采用格子玻尔兹曼(LB)方法,利用改进后的伪势模型和热模型分别模拟流动和传热过程。为验证模型的合理性,对模拟结果与经验关系式进行了定量对比。之后对气泡行为对沸腾传热系数的影响进行了研究,结果表明,随着气泡的核化、生长、滑移和脱离,传热系数呈现周期性波动。最后考察了重力加速度对气泡行为和沸腾传热的影响,重力越大,气泡生长周期越短,沸腾传热系数越大。In order to study the heat transfer on flow boiling and bubble behavior in vertical tubes,the lattice Boltzmann（LB）method was used to simulate the flow and heat transfer processes respectively by the improved pseudo potential model and the thermal model.The simulation results were compared with the empirical relationships to verify the correctness of the model.The influence of bubble behavior on boiling heat transfer coefficient was investigated.The results show that the heat transfer coefficient presentsperiodic fluctuations with the nucleation,growth,slip and detachment of bubbles.Finally,the effect of gravity acceleration on bubble behavior and boiling heat transfer was investigated.The larger the gravity,the shorter the growth cycle of the bubble,the greater the boiling heat transfer coefficient.

关 键 词：格子玻尔兹曼 管内流动沸腾 沸腾传热 气泡周期 

分 类 号：TL329[核科学技术—核技术及应用]