Subcooled flow boiling resistance characteristics in narrow rectangular channel under natural circulation condition

被引：0
|
作者：
Yang K. [1 ]
Yan C. [1 ]
Cao X. [1 ]
机构：
[1] Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, Harbin, 150001, Heilongjiang
来源：
Huagong Xuebao/CIESC Journal | 2020年 / 71卷 / 07期
关键词：
Bubble; Narrow rectangular channel; Natural circulation; Subcooled flow boiling; Two-phase flow; Two-phase frictional pressure drop; Visualization; Voidage;
D O I：
10.11949/0438-1157.20191379
中图分类号：
学科分类号：
摘要：
Using deionized water as the experimental working medium, an experimental study of the frictional resistance characteristics of subcooled boiling in a narrow rectangular channel under single-sided heating visualization was carried out under low pressure and low flow rate natural circulation conditions. In the experiment study, the pressure drop data in the narrow rectangular test section was measured, high-speed camera was used as well to capture the two-phase flow images, calculation method that separates the two-phase frictional pressure drop in subcooled flow boiling was brought out. Based on the experimental data obtained, evaluation study of classical two-phase frictional pressure drop correlations from homogeneous flow and separated flow modes were carried out. The experimental results indicates that correlations that based on two-phase equivalent viscosity from homogeneous flow models significantly under estimate the friction pressure drop. Sun and Mishiba correlations and Tran correlations from separated flow models can predict the friction pressure drop pretty well with mean relative error under 15% error bands. Based on the experimental data obtained, empirically correlations for two-phase multiplier was obtained by considering the effect of liquid only Reynolds number, Martinelli parameter and Laplace number. The mean relative error of predicted result with the experimental data is within 10% error band. © All Right Reserved.
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页码：3060 / 3070
页数：10
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