基于不动点理论的核热耦合计算收敛特性研究

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基金项目:

“百人计划”引进人才科研启动经费

教育部“新世纪优秀人才支持计划”(NCET-10-0846)

中央高校基本科研业务费专项资金(11lgpy90)

Convergence Study on Neutronic/Thermohydraulic Coupling Based on Fixed Point Theory

1. School of Physics and Engineering, Sun Yat-sen University, Guangzhou, 510275, China;
2. Sino-French Institute of Nuclear Engineering & Technology, Sun Yat-sen University, Guangzhou, 510275, China

摘要: 对于一些具有强烈核热耦合行为的新型反应堆(如超临界水堆),一般的迭代方法不再适用。本文基于不动点理论提出核反应堆核热耦合计算的数学模型,结合超临界水堆的计算实例,对核热耦合计算的迭代方法进行收敛性分析,总结出核热耦合计算的收敛判定方法,通过该方法可实时得到迭代的收敛情况,同时提出了自适应松弛因子及其算法,并编写了实现该算法的程序。
- 超临界水堆 /
- 核热耦合 /
- 收敛性分析
Abstract: The traditional iterative method is not applicable for some new reactors（such as supercritical water-cooled reactor） which have intense neutronic/thermohydraulic coupling（N-T coupling） behavior. The mathematical model of N-T coupling based on fixed point theory is established in this paper, with the calculation examples of SCWR, so as to present the convergence analysis of iterative methods in N-T coupling. The convergent criterion of N-T coupling is proposed, which can show the real-time convergence situation of iteration. Moreover, the self-adaptive relaxation factor and corresponding algorithm were introduced.
- Supercritical water-cooled reactor /
- Neutronic/thermalhydraulic coupling /
- Convergence analysis