多孔肋细小通道热沉中流动沸腾流型实验研究  

Experimental Investigation on Flow Patterns of Flow Boiling in Porous Fin Mini-channels Heat Sinks

作　　者：高武焕 付铠 徐向华[1] 梁新刚[1] GAO Wuhuan;FU Kai;XU Xianghua;LIANG Xingang(Key Laboratory for Thermal Science and Power Engineering of MOE,School of Aerospace Engineering,Tsinghua University,Beijing 100084,China;Beijing Institute of Astronautical Systems Engineering,Beijing 100076,China)

机构地区：[1]清华大学航天航空学院,热科学与动力工程教育部重点实验室,北京100084 [2]北京宇航系统工程研究所,北京100076

出　　处：《工程热物理学报》2025年第4期1270-1277,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51876102)。

摘　　要：本文实验研究了R134a在不同长度泡沫铜肋细小通道热沉中流动沸腾的流型变化规律。将实验观察到的流型整理为泡状流、弹状流、搅拌流、液丝环状流和环状流的组合。发现在长实验段实验中,热流密度对流型分界干度的影响和实体肋通道中的情况相反,流量越大越容易形成纯泡状流和环状流;在短实验段实验中,流型的交替现象更加复杂,存在搅拌流的干度范围更大,环状流气核中的液滴更多。In this paper,the flow pattern of R134a in the mini-channels of different lengths with foam copper fins are investigated experimentally.The flow patterns are identified as the combination of the bubbly flow,the slug flow,the churn flow,the wispy-annular flow and the annular flow.In the long channel test,it is found that the influence of the heat flux on the critical quality between flow patterns is opposite to that in the channel with solid fins,and increasing the flow rate makes it easier to form the pure bubbly flow and the annular flow.In the short channel test,the alternation of flow patterns is more complex,the quality range of the churn flow is larger,and there are more droplets in the center of the annular flow.

关 键 词：小通道 多孔铜肋 流动沸腾 流型 

分 类 号：TK124[动力工程及工程热物理—工程热物理]