以云南省境内某调峰调频电站的低比转速混流式HLA351水轮机为原型,利用软件Pro/E对其转轮进行三维实体建模,采用混合四面体非结构网格对转轮模型进行网格划分,以固液两相流动数学模型为理论基础,将完成网格划分工作的转轮模型导入Fluent软件,采用SIMPLE算法,在笛卡尔坐标系中利用κ-ε-Ap两相紊流模型分别对仅有主叶片的水轮机转轮(长模型)以及主、副叶片结合的转轮(混合模型)在含沙水两相流动时的内部流场进行三维定常数值模拟。结果表明,混合模型转轮内流速和压力的分布相对于长模型更合理,从转轮进口到出口,速度差和压力差均较大,转换成旋转机械能的水能所占比重更大,水轮机效率更高,且相同部位上混合模型遭受磨损的情况更轻、性能更优。 Taking the low specific speed Francis HLA351 hydraulic turbine of a peak regulation FM power station in Yunnan Province as a prototype, the Pro / E 3D solid model of its runner was established by software Pro / E. The mesh of the runner model was simulated by hybrid tetrahedral unstructured grid Based on the mathematical model of solid-liquid two-phase flow, the rotor model of meshing was imported into Fluent software. The SIMPLE algorithm was used to analyze the turbulence model in a Cartesian coordinate system using κ-ε-Ap two-phase turbulence model The three-dimensional steady-state numerical simulation of the internal flow field of turbine runner (long model) with main blade only, and runner (mixed model) combined with main blade and auxiliary blade when the two-phase flow of sandy water flows. The results show that the distribution of flow velocity and pressure in the mixed model runner is more reasonable than that of the long model. From the entrance to the exit of the runner, the velocity difference and pressure difference are larger, and the proportion of water energy converted into rotating mechanical energy is larger. More efficient, and mixed models on the same site suffered less wear and tear, better performance.