报导了三峡混流式机组模型蜗壳内紊流的三维数值分析结果。文中基于Ｎ－Ｓ方程和标准的ｋ－ε紊流模型，采用贴体座标和交错网格系统，用ＳＩＭＰＬＥＣ算法对蜗壳内部的流动进行数值模拟，提出设计工况时蜗壳内部的紊流特性。数值分析结果表明：在设计工况，蜗壳内部的流动符合速度矩为常数的设计理论。文中提出的数值方法，可用于改进和优化蜗壳设计，从而提高水轮机的效率，改善水轮机的性能。 The results of three-dimensional numerical analysis of the turbulent flow in the Three Gorges Francis turbine model volute are reported. Based on the N-S equation and the standard k-ε turbulence model, the body coordinates and the staggered grid system are used. The SIMPLEC algorithm is used to simulate the flow inside the volute. The internal turbulence Flow characteristics. The results of numerical analysis show that the flow in the volute conforms to the design theory that the moment of velocity is constant in the design condition. The numerical method proposed in this paper can be used to improve and optimize the volute design, so as to improve the efficiency of the turbine and improve the performance of the turbine.