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在先进核反应堆中 ,为克服沸腾两相自然循环系统沸腾起始点和干涸点等突变点处的数值稳定性问题 ,本工作在EICE算法 (extendedimplicitcontinuous fluideulerianmethod)基础上发展了数值仿真算法AEICE ,对可能存在的两相自然循环系统的动态稳定性进行了分析。分析结果表明 :增大系统压力和增加入口欠热度均将增大两相自然循环系统的稳定区域。经比较 ,计算结果与实验数据符合较好
In advanced nuclear reactors, to overcome the numerical stability at the abrupt point, such as the initial boiling point and the dry-out point of a two-phase boiling natural circulation system, this work developed the numerical simulation algorithm AEICE based on the EICE algorithm (extendendmplicit continuous fluideulerianmethod) The dynamic stability of two-phase natural circulation system is analyzed. The results show that increasing the system pressure and increasing the underheating of the inlet will increase the stable area of two-phase natural circulation system. After comparison, the calculated results are in good agreement with the experimental data