摘要
提出新型结构形式的重力热管换热器,通过合理简化,建立单根竖直管道的稳态传热物理模型,分别对冷凝段、绝热段和蒸发段建立相应的稳态传热数学模型,应用等热流密度边界条件并通过工程方程求解器(EES)进行了数值计算。计算结果表明:运行热阻计算值总体波动不大,计算结果不能很好地反应充液率对运行热阻的影响;液膜厚度随加热功率增大而增加;液池高度随充液率的增加而增加;充液率较小时,较低加热功率对应的液池高度大于较高加热功率对应的液池高度,充液率较大时,小加热功率对应的液池高度反而低于大加热功率对应的液池高度。
A novel gravity-assisted heat pipe heat exchanger was presented. By reasonable simplification, a physical model of a single vertical channel was set up, and a mathematical model of steady-state heat transfer for condenser section and evaporator section was established respectively which adopted uniform heat flux boundary condition. The numerical simulation was carried out by engineering equation solver （EES）. The results show that the numerical solution Of thermal resistance varies in a very small range, which can not reflect the change of thermal resistance with the change of filling ratio; The liquid film becomes thicker when the heating power increases; the height of liquid pool in evaporator section increases with the increase of filling ratio; the height of liquid pool at lower heating power is higher than that at higher heating power when the filling ratio is lower, but the result is reverse if the filling ratio is higher.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第4期1689-1694,共6页
Journal of Central South University:Science and Technology
基金
中央高校基本科研业务费中南大学自由探索研究创新基金资助项目(201011200026)
中南大学博士后基金资助项目(2010年)
关键词
重力热管
换热器
稳态
传热
gravity-assisted heat pipe
heat exchanger
steady-state
heat transfer
