The analysis of density wave instability phenomena of supercritical water in two parallel channels

被引：7
|
作者：
Zang, Jinguang
Yan, Xiao [1 ]
Huang, Yanping
机构：
[1] Nucl Power Inst China, Chengdu, Peoples R China
来源：
ANNALS OF NUCLEAR ENERGY | 2021年 / 152卷
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Supercritical water; Parallel channel; Density wave instability; System code; FLOW INSTABILITY; DYNAMIC-BEHAVIOR; HEATED CHANNEL; STABILITY; REACTOR;
D O I：
10.1016/j.anucene.2020.108014
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
The density wave instability is a very important thermal hydraulic phenomenon in water reactors design. The supercritical water is a kind of special fluid state which has both the characteristics of single-phase and two-phase fluids. Due to the sharp fluid properties variation near the pseudocritical point, the density wave instability of supercritical water has its own peculiarities. The stability analysis of supercritical fluid has been performed by some researchers. Some experimental results are available now to verify the numerical tools and promote the knowledge of flow instability phenomena at supercritical pressure. In this paper, the system analysis code Relap5 is used as the tool to help explain the mechanism of the density wave instability. The calculation method was verified with the experiments. Parametric effects on flow instability were discussed and stability boundaries were presented. The dimensionless parameters were analyzed which showed good potential to be used for the instability analysis of supercritical water. (C) 2020 Elsevier Ltd. All rights reserved.
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页数：9
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