Experimental study on Ledinegg flow instability of two-phase natural circulation in narrow rectangular channels at low pressure

被引：10
|
作者：
Qi, Shi [1 ,2 ,3 ]
Zhou, Tao [1 ,2 ,3 ]
Li, Bing [1 ,2 ,3 ]
Shahzad, Muhammad Ali [1 ,2 ,3 ]
Zou, Yaxiong [1 ,2 ,3 ]
Huang, Yan-Ping [4 ]
机构：
[1] North China Elect Power Univ, Sch Nucl Sci & Engn, Beijing 102206, Peoples R China
[2] North China Elect Power Univ, Nucl Safety & Thermal Power Standardizat Inst, Beijing 102206, Peoples R China
[3] Beijing Key Lab Pass Safety Technol Nucl Energy, Beijing 102206, Peoples R China
[4] CNNC Key Lab Nucl Reactor Thermal Hydraul Technol, Chengdu 610041, Peoples R China
来源：
PROGRESS IN NUCLEAR ENERGY | 2017年 / 98卷
基金：
中国国家自然科学基金;
关键词：
Narrow rectangular channel; Two-phase flow; Low pressure; Natural circulation; Ledinegg flow instability;
D O I：
10.1016/j.pnucene.2017.04.011
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：
Ledinegg flow instability of two-phase natural circulation has been experimentally investigated based on a natural circulation device with narrow rectangular channels. When heating power reaches a certain range, the Ledinegg flow instability occurs in the system, accompanied by flow oscillation. The stability of the experimental system increases with the increasing of inlet sub-cooling, pressure and size of rectangular channels. Stability boundaries of the system are obtained by the sub-cooling number and the phase change number. It is discovered that there are 4 stages of Ledinegg flow instability in the narrow rectangular channels: condensation, ebullition, choking, and rebalance. Finally, the experience correlation is proposed for the initial power of Ledinegg flow instability in narrow rectangular channels. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：321 / 328
页数：8
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