哈尔滨工程大学学报2023，Vol.44Issue(12)：2095-2102,8.DOI:10.11990/jheu.202309010
棒束子通道两流体全隐式Picard Krylov算法
Two-fluid fully implicit Picard-Krylov algorithm for rod bundle subchannel
摘要
Abstract
To improve the accuracy and efficiency of the thermal-hydraulic calculation of the rod bundle channel of a pressurized water reactor,this paper proposes a fully implicit Picard-Krylov algorithm that combines the Picard and Krylov subspace algorithms.The Picard algorithm is used to complete the fully implicit solution of the two-fluid equations of the rod bundle subchannels,and the Krylov subspace algorithm is used to improve the Picard iteration calculation efficiency.We found that the numerical results of the fully implicit Picard-Krylov algorithm are consist-ent with the experimental results in the benchmark based on NUPEC PWR subchannel and bundle tests.Compared with the Picard algorithm,the steady-state calculation efficiency increases by up to 89.7%,and the transient cal-culation efficiency increases by up to 20.68%.The fully implicit Picard-Krylov algorithm has higher calculation ac-curacy and efficiency than the traditional operator splitting and Picard iteration methods.关键词
Picard算法/Krylov子空间算法/两流体模型/压水堆子通道及棒束通道基准题/子通道分析/全隐式算法/计算精度/计算效率Key words
Picard algorithm/Krylov subspace algorithm/two-fluid model/benchmark based on NUPEC PWR sub-channel and bundle tests/subchannel analysis/fully implicit algorithm/calculation accuracy/calculation efficiency分类
能源科技引用本文复制引用
张宇航,田兆斐,李磊,钱浩..棒束子通道两流体全隐式Picard Krylov算法[J].哈尔滨工程大学学报,2023,44(12):2095-2102,8.基金项目
中核集团领创项目. （）
