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

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

• Energy and Power • Previous Articles Next Articles

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

Abstract

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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pressure drop

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micro-pin-fins, visualization

CLC Number:

TK124

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

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