微柱群通道流动沸腾两相摩擦压降特性研究

doi:10.3976/j.issn.1002-4026.2017.06.009

micro-pin-fins, visualization,"/> 微柱群通道流动沸腾两相摩擦压降特性研究

山东科学 ›› 2017, Vol. 30 ›› Issue (6): 50-57.doi: 10.3976/j.issn.1002-4026.2017.06.009

微柱群通道流动沸腾两相摩擦压降特性研究

郭保仓^1,2，杜保周^1,2，刘志刚¹*，孔令健¹，吕明明¹，李慧君²

1.山东省科学院流动与强化传热重点实验室，山东省科学院能源研究所，山东济南 250014；2.华北电力大学能源机械与动力工程学院，河北保定 071003

收稿日期:2017-08-16 出版日期:2017-12-20 发布日期:2017-12-20
通信作者: 刘志刚。E-mail：zgliu9322@163.com E-mail:zgliu9322@163.com
作者简介:郭保仓（1991—），男，硕士研究生，研究方向为强化与换热。
基金资助:
山东省自然科学基金（ZR2016YL005）

Experimental study of flow boiling two-phase frictional pressure drop in an array of micro-pin-fins

GUO Bao-cang^1,2, DU Bao-zhou^1,2, LIU Zhi-gang¹*, KONG Ling-jian¹, LÜ Ming-ming¹, LI Hui-jun²

1. Key Laboratory for Flow &Enhanced Heat, Energy Research Institute，Shandong Academy of Sciences, Jinan 250014, China; 2. School of Energy Power and Mechanical Engineering，North China Electric Power University，Baoding 071003, China

Received:2017-08-16 Online:2017-12-20 Published:2017-12-20

摘要/Abstract

摘要：

为探究微柱群通道流动沸腾两相摩擦压降的影响因素，对高度和直径均为500 mm的微圆柱组成的叉排微柱群通道进行了实验研究，并借助高速摄像仪对通道内不同加热功率的气液两相流型进行了记录分析。实验中质量流速范围341~598.3 kg·m-2·s-1，热流密度范围20~160 W·cm-2，工质出口干度范围0~0.2。实验结果表明，两相摩擦压降随着质量流速的增大而增大，随着热流密度的增大呈线性增长；工质进口过冷度对两相摩擦的影响随着出口干度的升高逐渐减弱。通过可视化研究发现，随着热流密度的增大，微通道内流动沸腾的流型变化依次为泡状流、环状流，环状流区两相摩擦压降明显高于泡状流区。

关键词: 流动沸腾, 可视化, 两相摩擦压降, 微通道, 两相流

Abstract:

To investigate the factors affecting the flow boiling twophase frictional pressure drop in an array of micropinfins, the experiments were carried out in micro pin fin heat sink having cylindrical fins with height of 500 mm and diameter of 500 mm, in which twophase flow patterns with different heating powers were recorded and analyzed by the high speed camera. The experiment parameters were as follows: mass flux G=341~598.3 kg·m-2·s-1, heat flux q=20~160 W·cm-2, vapor quality x=0~0.2. The results showed that the twophase frictional pressure drop increased with the mass flux and increased linearly with the heat flux. The influence of the fluid subcooled on the two-phase frictional pressure drop was weakened gradually with the increase in vapor quality. Based on the visual observations, the bubble flow and annular flow were observed in the micro pin fin heat sink with the increase of heat flux, and the twophase frictional pressure drop in annular flow was obviously higher than that in bubble flow.

Key words: flow boiling, two-phase flow, pressure drop

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中图分类号:

TK124

郭保仓，杜保周，刘志刚，孔令健，吕明明，李慧君. 微柱群通道流动沸腾两相摩擦压降特性研究[J]. 山东科学, 2017, 30(6): 50-57.

GUO Bao-cang, DU Bao-zhou, LIU Zhi-gang, KONG Ling-jian, Lü Ming-ming, LI Hui-jun. Experimental study of flow boiling two-phase frictional pressure drop in an array of micro-pin-fins[J]. SHANDONG SCIENCE, 2017, 30(6): 50-57.

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微柱群通道流动沸腾两相摩擦压降特性研究

Experimental study of flow boiling two-phase frictional pressure drop in an array of micro-pin-fins

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