基于蒙特卡罗方法和 CFD 方法的物理-热工耦合计算

摘要

The high‐fidelity multi‐physics coupling platform can be established through coupling Monte Carlo neutron transport code MCNP5 and commercial CFD software STAR‐CCM + . A coupling code written in Perl language was employed to couple MCNP5 and STAR‐CCM + by ASC Ⅱ text data files .For fuel and moderator cells w hich have strong feedback effects , the hexahedral mesh model option “trimmer” of STAR‐CCM + was chosen to realize a one‐to‐one correspondence with MCNP5 .For cladding cells which have weak feedback effects ,the volume weight method was adopt‐ed .The steady‐state high‐fidelity neutronics and thermal‐hydraulics coupling code was developed under Linux platform .The single fuel element and 3 × 3 PWR lattice model were calculated using the coupled code . The numerical results demonstrate that the method and model proposed in this paper are applicable for high‐fidelity neutronics and thermal‐hydraulics coupling calculation .%基于蒙特卡罗中子输运程序MCNP5和商用CFD软件STAR‐CCM＋的耦合可搭建反应堆高保真多物理耦合计算平台。通过Perl语言以 ASCⅡ文本文件方式耦合了 MCNP5和STAR‐CCM ＋，利用STAR‐CCM＋的六面体网格生成模块“trimmer”实现两者在反馈作用强烈的燃料和慢化剂区域一一对应的空间网格划分，而在反馈作用较弱的包壳区域采取体积权重的网格映射方式，在Linux环境下开发了高保真物理‐热工耦合稳态分析程序。利用该耦合程序计算了典型压水堆单根燃料棒和3×3带水洞的燃料子组件，数值结果表明，本文建立的耦合方法和模型可用于高保真物理‐热工耦合计算。