微肋阵通道沸腾起始点实验研究

doi:10.3976/j.issn.1002-4026.2018.04.011

山东科学 ›› 2018, Vol. 31 ›› Issue (4): 65-71.doi: 10.3976/j.issn.1002-4026.2018.04.011

微肋阵通道沸腾起始点实验研究

孔令健，刘志刚*，季璨，江亚柯

齐鲁工业大学（山东省科学院），山东省科学院能源研究所，山东济南 250014

收稿日期:2018-06-18 出版日期:2018-08-20 发布日期:2018-08-20
作者简介:孔令健（1986—），男，助理研究员，研究方向为微通道流动与换热研究。
基金资助:
山东省自然科学基金(ZR2016YL005，ZR2018BEE028)；山东省重点研发计划(2016GGX104004)

Experimental investigation of boiling incipience in micro pin fin heat sinks

KONG Ling-jian, LIU Zhi-gang*, JI Can, JIANG Ya-ke

Energy Research Institute，Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014,China

Received:2018-06-18 Online:2018-08-20 Published:2018-08-20

摘要/Abstract

摘要：

以去离子水为工质，在质量流速G=292.8~412.2 kg/(m²·s)，入口温度T_in=50.6~81.5 °C，热流密度q"=10.1~87.1 W/cm²的条件下，对圆形、菱形和椭圆形微肋阵通道内沸腾起始点特性进行了实验研究。对微肋阵通道内单相对流传热和两相沸腾传热过程的分析结果表明，壁温和压降曲线的变化趋势均可作为沸腾起始点的判定依据。通过分析各实验参数对沸腾起始点热流密度的影响趋势，发现微肋阵通道内沸腾起始点热流密度随质量流速的增大而增大，但是随着入口温度的增大而减小；在相同工况条件下，圆形、菱形和椭圆形微肋阵通道沸腾起始点热流密度依次减小。

关键词: 气液两相流, 微肋阵通道, 相变, 沸腾起始点

Abstract:

An experiment study has been conducted to investigate the onset of nucleate boiling (ONB) characteristics of deionized water in circular, diamond and elliptic micro pin fin heat sinks. The experiments were carried out in a range of mass flux from 292.8 to 412.2 kg/(m²·s), inlet temperature from 50.6 to 81.5 °C, heat flux from 10.1 to 87.1 W/cm². The wall temperature and pressure drop distributions of the micro pin fin heat sinks were analyzed from singlephase forced convection to twophase flow boiling heat transfer. The experiment results indicate that the ONB can be identified as the point at which deviations from singlephase trend is shown as a sudden change in temperature and pressure drop versus the heat flux. A parametric study was explored to investigate the effects of the experimental parameters on ONB. The heat flux at the ONB increases with an increase in mass flux. However, raising the inlet temperature can cause a reduction on the heat flux at the ONB. Besides, the heat flux at the ONB in circular, diamond and elliptic micro pin fin heat sink decreases successively under the same experimental condition.

Key words: gas-liquid flow, onset of nucleate boiling, phase change, micro pin fin heat sink

中图分类号:

TK121

孔令健，刘志刚，季璨，江亚柯. 微肋阵通道沸腾起始点实验研究[J]. 山东科学, 2018, 31(4): 65-71.

KONG Ling-jian, LIU Zhi-gang, JI Can, JIANG Ya-ke. Experimental investigation of boiling incipience in micro pin fin heat sinks[J]. SHANDONG SCIENCE, 2018, 31(4): 65-71.

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微肋阵通道沸腾起始点实验研究

Experimental investigation of boiling incipience in micro pin fin heat sinks

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