摘要
仿蜂巢微通道应用于分离式热管蒸发段,基于多相流VOF(流体体积)法并通过数值模拟来探究仿蜂巢微通道分离式热管的流动和热特性。模型计算验证了实验可行性达到标准,并针对不同充液率和加热功率对仿蜂巢微通道分离式热管传热性能的影响进行了仿真研究。结果表明:充液率为80%的条件下其热阻达到最小值,传热性能最优。并且在同一充液率下随着加热功率的增大,仿蜂巢微通道分离式热管的启动温度升高,蒸发段到达速度峰值时间越短且整体热阻也减小。最后从蒸发段平均温度、启动时间和热阻三方面分析得出仿蜂巢微通道分离式热管传热性能优于平行微通道分离式热管。
Honeycomb microchannel was applied to the evaporation section of separated heat pipe.Based on multiphase flow VOF(volume of fluid)and numerical simulation method,the flow and thermal characteristics of honeycomb microchannel separated heat pipe were investigated.The experimental feasibility was verified by the model calculation,and the influence of different filling rate and heating power on the heat transfer performance of the honeycomb microchannel separated heat pipe was simulated.The results show that the thermal resistance reaches the minimum and the heat transfer performance is the best when the liquid filling rate is 80%.With the increase of heating power at the same liquid filling rate,the starting temperature of honeycomb microchannel separated heat pipe increases,and the time to reach the peak velocity of the evaporation section is shorter and the overall thermal resistance is reduced.Finally,the heat transfer performance of honeycomb microchannel separated heat pipe is better than parallel microchannel separation heat pipe from three aspects of average temperature of evaporation section,starting time and thermal resistance.
作者
李星佑
黄坤荣
邢佳慧
向立平
段宁康
LI Xingyou;HUANG Kunrong;XING Jiahui;XIANG Liping;DUAN Ningkang(School of Mechanical Engineering,University of South China,Hengyang 421001,Hunan Province,China;School of Nuclear Science and Technology,University of South China,Hengyang 421001,Hunan Province,China)
出处
《化学工程》
CSCD
北大核心
2024年第1期48-53,共6页
Chemical Engineering(China)
基金
国家自然科学基金资助项目(52075538,11872374)
湖南省自然科学基金资助项目(2020JJ5670)。
关键词
分离式热管
仿蜂巢微通道
数值模拟
传热性能
separated heat pipe
honeycomb microchannel
numerical simulation
heat transfer performance
