混流式水轮机全流道内部流场CFD数值模拟研究

摘要

根据标准k-ε双方程和雷诺时均（N-S）方程，给定转轮边界条件，建立水轮机内部流动的数学模型。通过Fluent，以HL002-LJ-410混流型水轮机为例，对水轮机全流道内部流场进行了三维数值模拟研究。获取了水轮机在最优工况、小开度工况和大开度工况3种典型工况下过流部件的湍流流动性能参数和流场分布。计算结果表明，对比其他两工况下最优工况时蜗壳静压、流速和尾水管流动较理想。同时表明，水轮机过流部件有一定的改造优化空间。%ABSTRACT:According to the standards k-ε double equa-tions and Reynolds averaged(N-S)equation,the boundary con-ditions of the given runner,the establishment of mathematical model of internal turbine flow. Throughout the Fluent,with the example HL002-LJ-410 mixed flow type turbine,the internal flow field of Francis turbine runner was simulated. Draws a turbulent flow performance parameters and the distribution of flow field of hydraulic turbine components in the optimal condition,the small opening condition and large opening con-ditions have a total of 3 kinds of typical operation conditions. The calculation results show that the volute static pressure, velocity and draft tube flow of the optimal condition are better, which compared to the other two conditions. At the same time also shows that the hydraulic turbine components have certain space to the transformation and optimization.