Critical heat flux prediction for saturated flow boiling of water in vertical tubes

被引：54
|
作者：
Celata, GP
Mishima, K
Zummo, G
机构：
[1] ENEA, Dept Energy, Inst Thermal Fluid Dynam, I-00060 Rome, Italy
[2] Kyoto Univ, Inst Res Reactor, Kumatori, Osaka 59004, Japan
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2001年 / 44卷 / 22期
关键词：
boiling; modeling; two-phase flow;
D O I：
10.1016/S0017-9310(01)00072-2
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
This study presents a new analytical model for the prediction of the critical heat flux (CHF) in water saturated flow boiling in round vertical and uniformly heated pipes. The CHF is assumed to occur in annular flow when the liquid film vanishes at the exit section of the heated channel. Channel pressure drop is calculated using the Friedel correlation. Liquid film flow rate is obtained by a balance of liquid entrainment and droplet deposition. Two mechanisms are considered in the calculation of the entrainment: liquid-vapour interfacial waves and boiling in the liquid film. The model CHF prediction values are compared with a data set of 5159 selected experimental points for water, showing a good agreement both in precision and in accuracy for liquid quality in the range 0.2-1.0. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：4323 / 4331
页数：9
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