Experimental study of unsteady convective boiling in heated minichannels

被引：150

作者：

Brutin, D ^{[1
]}

Topin, F ^{[1
]}

Tadrist, L ^{[1
]}

机构：

[1] Univ Aix Marseille 1, Ecole Polytech Marseille, Lab IUSTI, CNRS,UMR 6595, F-13453 Marseille, France

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2003年 / 46卷 / 16期

关键词：

convective boiling; minichannels; instabilities;

D O I：

10.1016/S0017-9310(03)00093-0

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Convective boiling in narrow channels may under specific conditions display an unsteady behavior. An experimental set-up has been elaborated to investigate heat and mass transfer and to analyze two-phase flow instabilities in rectangular microchannels with a hydraulic diameter of 889 mum. Depending on the operating conditions two types of behavior are observed: a steady state characterized by pressure drop fluctuations with low amplitudes (from 0.5 to 5 kPa/m) and no characteristic frequency; a non-stationary state of two-phase flow. The pressure signals exhibit fluctuations with high amplitudes (from 20 to 100 kPa/m) and frequencies ranging from 3.6 to 6.6 Hz. Steady and unsteady thermo-hydraulic behaviors depending on the two control parameters (heat flux and mass velocity) are analyzed and given in this paper. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：2957 / 2965

页数：9

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