微肋阵通道沸腾起始点实验研究

doi:10.3976/j.issn.1002-4026.2018.04.011

Abstract

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

CLC Number:

TK121

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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Experimental investigation of boiling incipience in micro pin fin heat sinks

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