基于有限体积求解平台的核反应堆系统分析 求解器开发

Under the development of numerical reactor technologies, multi-scale coupled simulation based on a unified platform has become a major research focus. Given the high extensibility and 3D solving capabilities of the finite volume platform OpenFOAM, a quasi-one-dimensional solver named STACO has been developed in this study to explore the feasibility of system-level analysis on this platform. STACO constructs physically representative geometries using structured meshes, retaining three-dimensional solution characteristics. Meanwhile, through the simplification of governing equations and the development of tailored constitutive models and thermal component libraries, the solver enables efficient simulation of single-phase flow and heat transfer. Validation against single-tube and system loop cases shows that STACO’s results agree well with those from RELAP5, demonstrating its ability to predict thermal-hydraulic parameter distributions accurately and confirming the feasibility of conducting system-level analysis within OpenFOAM. Ongoing work focuses on extending the solver to incorporate more complex capabilities, including two-phase flow and multi-domain coupling, so as to build a unified, multi-scale solution framework based on OpenFOAM.