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研究了ＨＴＲ－１０堆芯的动态仿真，为反应堆控制系统的分析和设计服务。由于堆芯模型方程是典型的非定常可压缩Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程组，要求快速准确的求解。求解算法采用了结合多重网格的ＳＩＭＰＬＥＣ算法，并且讨论了多重网格法的基本思想、算法步骤和计算流程。通过对求解域中的不规则区域的处理、合理的进行粗细网格的划分和校正、设置出口缓冲区等措施，克服了在ＨＴＲ－１０堆芯动态仿真中运用多重网格法的困难，并且所得的结果与单网格算法进行了比较。仿真结果表明：达到同样精度，采用多重网格方法，求解过程比单网格算法的迭代次数减少了约５／６，计算时间减少了约一半，为快速进行堆芯动态仿真提供了条件。
The dynamic simulation of the HTR-10 core was studied to provide analysis and design services for the reactor control system. Since the core model equations are typical unsteady compressible Navier-Stokes equations, fast and accurate solutions are required. The solution algorithm uses a SIMPLEC algorithm that combines multiple grids, and discusses the basic idea, algorithm steps and calculation flow of the multiple grid method. Through the treatment of irregular regions in the solution domain, the rational division and correction of the coarse and fine grids, the establishment of the exit buffer and other measures, it overcomes the difficulty of using the multi-grid method in the HTR-10 core dynamic simulation, and The results obtained are compared with the single-grid algorithm. The simulation results show that, with the same precision, using multigrid method, the number of iterations of the solving algorithm is reduced by about 5/6 and the calculating time is reduced by about half compared with the single grid algorithm, which provides the conditions for fast core dynamic simulation.