Theoretical study on the characteristics of critical heat flux in vertical narrow rectangular channels

被引：26
作者：
Du, D. X. [1 ]
Tian, W. X. [1 ]
Su, G. H. [1 ]
Qiu, S. Z. [1 ]
Huang, Y. P. [2 ]
Yan, X. [2 ]
机构：
[1] Xi An Jiao Tong Univ, Dept Nucl Sci & Technol, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China
[2] China Natl Nucl Corp, Key Lab Nucl Reactor Thermal Hydraul Technol, Chengdu 610041, Peoples R China
来源：
APPLIED THERMAL ENGINEERING | 2012年 / 36卷
基金：
中国国家自然科学基金;
关键词：
Annular upward flow; Critical heat flux; Vertical narrow rectangular channel; FLOW; LIQUID; PREDICTION; ENTRAINMENT; DROPLETS; SIDES;
D O I：
10.1016/j.applthermaleng.2011.11.039
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A mathematical separated flow model of annular upward flow has been developed to predict the critical heat flux (CHF) in uniformly heated vertical narrow rectangular channels. The theoretical model is based on fundamental conservation principles: the mass, momentum, and energy conservation equation of the liquid film and the momentum conservation equation of the vapor core together with a set of closure relationships. The comparisons between the theoretically predicted results and the experimental data demonstrate that a good agreement between them has been achieved. With the applications of the present model, the influences of several parameters (such as system pressure, inlet mass flux and channel size) on the CHF in rectangular channels are analyzed, and the CHF is compared with that in annular channels. (C) 2011 Elsevier Ltd. All rights reserved.
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页码：21 / 31
页数：11
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