STAR-CCM+与一维用户程序耦合方法

Coupled method of STAR-CCM+and one-dimensional user code

为了探究棒束通道内的自然循环流动特性,本文采用将三维计算流体动力学(CFD)软件STAR-CCM+与一维用户程序(User Code)耦合的方法进行研究。通过三维软件模拟棒束通道,一维自定义用户程序模拟自然循环回路的方法实现对包含棒束通道的自然循环系统的模拟。为证明数值模拟结果的准确性,将数值模拟得到的自然循环冷却剂流量和棒束通道内压降结果与实验结果进行比较,结果表明:数值模拟结果与实验值符合较好,证实STAR-CCM+与一维用户程序耦合的计算方法能够很好的预测棒束通道的自然循环流动特性。本文对一维用户程序与三维STAR-CCM+之间的数据交互方法做了说明,为实现一维用户程序与STAR-CCM+耦合研究提供参考。

To explore the natural circulation flow characteristics in a rod bundle channel,we studied the method for coupling the three-dimensional computational fluid dynamics(CFD)software STAR-CCM+with one-dimensional user code.The simulation of a natural circulation system containing a rod bundle channel was achieved by simulating both a natural circulation loop with one-dimensional user code and a rod bundle channel with three-dimensional CFD software.To check the accuracy of the numerical simulation results,the simulation results of the natural circulation coolant flow rate and the pressure drop in the rod bundle channel are compared with the experimental results.It is found that the numerical simulation results agree well with the experimental results,and it is proved that the simulation method of STAR-CCM+coupling with one-dimensional user code is a good predictor of the natural circulation flow characteristics of the rod bundle channel.This paper gives a detailed description of the data interaction method between the one-dimensional user code and the three-dimensional STAR-CCM+,which provides a reference for other scholars to realize the coupling between STAR-CCM+and user code.