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基于N-S方程和标准k-ε紊流模型,采用CFD计算流体力学软件对HLA616-WJ-55混流式水轮机原型机的蜗壳、导叶及转轮内部水流进行二维定常数值模拟,并与同型式水轮机的蜗壳、导叶及转轮内部流动三维数值模拟结果进行比较分析。结果表明,二维与三维蜗壳内部流动的规律基本一致,压力分布和速度分布比较均匀,流动状况较为理想。二维CFD分析能较全面地预测水轮机蜗壳、导叶及转轮内部流场的结构,数值模拟结果对水轮机选型和优化设计均具有重要的指导意义。
Based on the Navier-Stokes equations and the standard k-ε turbulence model, CFD computational fluid dynamics software was used to simulate two-dimensional steady-state numerical simulation of the flow in the volute, guide vane and rotor of the HLA-116-WJ-55 Francis turbine. Type turbine turbine, guide vane and runner internal flow three-dimensional numerical simulation results for comparative analysis. The results show that the internal flow laws of two-dimensional and three-dimensional spiral case are basically the same, the pressure distribution and velocity distribution are relatively uniform, and the flow conditions are ideal. The two-dimensional CFD analysis can predict the structure of the flow field inside the turbine volute, the guide vane and the runner more comprehensively. The numerical simulation results have important guiding significance for turbine type selection and optimization design.