论文标题
在系统热液压代码和降低订单CFD模型之间开发耦合
Development of a coupling between a system thermal-hydraulic code and a reduced order CFD model
论文作者
论文摘要
核能社区与一维系统的热液压（STH）代码结合了几个三维计算流体动力学（CFD）求解器。这项工作建议通过减少订单模型（ROM）替换CFD求解器，以降低计算成本。系统代码Relap5-mod3.3和有限卷CFD求解器OpenFOAM的ROM通过使用隐式耦合方案的分区域分解耦合算法耦合。使用惩罚方法在ROM中施加了以耦合边界接口运输的速度。耦合模型在打开和封闭的管流配置上进行评估。耦合模拟与ROM的结果接近具有CFD求解器的结果。同样，对于新的参数集，耦合的Relap5/ROM模型能够以良好的精度预测耦合的Relap5/cfd结果。最后，与ROM耦合的速度比与CFD求解器耦合的速度快3-5倍。
The nuclear community has coupled several three-dimensional Computational Fluid Dynamics (CFD) solvers with one-dimensional system thermal-hydraulic (STH) codes. This work proposes to replace the CFD solver by a reduced order model (ROM) to reduce the computational cost. The system code RELAP5-MOD3.3 and a ROM of the finite volume CFD solver OpenFOAM are coupled by a partitioned domain decomposition coupling algorithm using an implicit coupling scheme. The velocity transported over a coupling boundary interface is imposed in the ROM using a penalty method. The coupled models are evaluated on open and closed pipe flow configurations. The results of the coupled simulations with the ROM are close to those with the CFD solver. Also for new parameter sets, the coupled RELAP5/ROM models are capable of predicting the coupled RELAP5/CFD results with good accuracy. Finally, coupling with the ROM is 3-5 times faster than coupling with the CFD solver.
