Bifurcation and hysteresis phenomena in the two-phase natural circulation system

作     者：YAO Wei KUANG Bo XU Ji-jun (Department of Nuclear Power Engineering and Automation, School of Power and Anergy Engineering, Shanghai Jiaotong University, Shanghai, 200050) 

作者机构：Department of Nuclear Power Engineering and AutomationSchool of Power and Energy EngineeringShanghai Jiaotong University 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2001年第12卷第1期

页      面：61-67页

核心收录：

学科分类：080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：the National Natural Science Foundation (No.59776042) 

主　　题：沸腾水反应堆 双相自然环流系统 磁滞现象 

摘      要：The static bifurcation of the two-phase natural circulation (TPNC) system was studied theoretically and numerically. By the DERPAR algorithm the solution diagram was calculated, which shows that the static bifurcation occurs under some conditions in the TPNC systems. Also, it shows that, in a region of multiple solutions, the static instability may occur. It is defined as a region of thermal-siphon instability induced flow rate jumping. By means of the solution diagram, the stability margin can be determined in this region. Furthermore, the heat input at the peak of the solution diagram is defined as the maximum capacity Of heating load that can be used to judge the capacity of the TPNC of a given geometry topological structure. Meanwhile, it is interesting that the TPNC systems have the hysteresis phenomenon defined as thermal-siphon hysteresis. Some parametric effects related were also studied.