| 两相自然循环系统的静态分岔特性机理分析 |
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| 引用本文： | 佟立丽,姚伟,匡波,杨燕华,徐济.两相自然循环系统的静态分岔特性机理分析[J].核动力工程,2001,22(3):216-220,225. |
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| 作者姓名： | 佟立丽 姚伟 匡波 杨燕华 徐济 |
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| 作者单位： | 上海交通大学动力与能源工程学院, |
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| 摘 要： | 基于分岔理论及其DERPAR数值方法及均相模型，计算出两相自然循环系统的静态分岔解图，进一步得到不同压力下质量含汽率和空泡份额随加热功率的变化曲线图；深入讨论了流型转变对两相自然循环流动不稳定性的影响；分析了系统压力、含汽率、汽液两相密度差引起的不稳定性的机理；并比较了不同系统压力、欠热度、阻力、几何构型等参数对质量含汽率和空泡份额的影响。强调指出两相自然循环系统的静态分岔现象主要是由于汽液两相密度差引起的。随着压力的升高，汽液两相密度差异减小，有利于系统的稳定性。
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| 关 键 词： | 两相自然循环 静态分岔 质量含汽率 空泡份额 流动不稳定性 核反应堆 热工水力学 两相流 |
| 文章编号： | 0258-0926(2001)03-0216-05 |
Mechanism Analysis on Static Bifurcation of Two-Phase Natural Circulation |
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| TONG Li-li,YAO Wei,KUANG Bo,YANG Yan-hua,XU Ji-jun.Mechanism Analysis on Static Bifurcation of Two-Phase Natural Circulation[J].Nuclear Power Engineering,2001,22(3):216-220,225. |
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| Authors: | TONG Li-li YAO Wei KUANG Bo YANG Yan-hua XU Ji-jun |
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| Abstract: | Based on bifurcation theory and DERPAR numerical method,static bifurcation diagram in two-phase natural circulation is achieved using homogeneous model.Graphs of quality and void fraction versus input power are also obtained.Transitions between two-phase flow patterns can affect on the instability in two-phase natural circulation.Meanwhile trend of flow instability with system pressure,quality and density difference between liquid and vapor is discussed in detail.The parametric effects on system pressure,subcooling,local loss and length ratio are studied as well. |
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