摘要
为进一步了解表贴式内肋阵自循环蒸发冷却系统内部的沸腾两相流动换热规律,采用横截面积为180mm×20mm的内肋阵液盒作为研究对象,对内肋阵液盒内部沸腾换热流动过程进行了可视化观察,同时针对该内肋阵液盒内两相流动建立Friedel、L-M两种两相流动阻力压降仿真计算模型。实验发现液盒通道内的流型随着热负荷的变化,主要呈现泡状流和雾状流2种流型,液盒背面温度较为均匀,维持在65~70℃左右。液盒内部肋阵的存在,增强了通道内汽泡扰动,同时在肋柱后方存在明显尾迹涡流。通过研究对比发现Friedel模型计算结果与实验结果的最大相对误差小于15%,说明该模型更适用表贴式内肋阵蒸发冷却系统的压降计算。
In order to further understand the boiling two-phase flow heat transfer mechanism inside the surface-mounted internal rib array self-circulating evaporative cooling system,an inner rib array liquid box with the cross-sectional area of 180 mm×20 mm was studied and the flow process of boiling heat transfer was visually observed in the inner rib array liquid box.Meanwhile,Friedel and L-M two-phase flow resistance pressure drop simulation calculation models were established to simulate the two-phase flow process in the inner rib array liquid box respectively.Depending on the change of heat load,two flow patterns,bubble flow and mist flow,were found in the liquid box channel.The temperature on the back side of the liquid box is relatively uniform and is maintained at about 65-70°C.The internal rib array of the liquid box enhances the bubble disturbance in the channel while there is a significant wake vortex behind the rib.The maximum relative error between the calculated results of the Friedel model and the experimental results is less than 15%,which indicates that Friedel model is more suitable for the pressure drop calculation of this surface-mounted internal rib array evaporative cooling system.
作者
史一涛
曹瑞
阮琳
SHI Yitao;CAO Rui;RUAN Lin(Institute of Electrical Engineering Chinese Academy of Sciences,Haidian Distinct,Beijing 100190,China;University of Chinese Academy of Sciences,Haidian Distinct,Beijing 100049,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2020年第6期1997-2005,共9页
Proceedings of the CSEE
基金
中国科学院前沿科学研究重点项目(QYZDY-SSW-JSC026)。
关键词
表贴式
内肋阵液盒
沸腾
强化换热
两相压降
surface mounted
inner rib array liquid box
boiling
enhanced heat transfer
two-phase pressure drop
