水泵站底坎二维绕流湍流数值模拟

Numerical Simulation of Turbulent Flow around Sill with RNG k-ε Turbulent Model

采用基于 RNG方法的湍流模型对水泵站底坎绕流流场进行了数值模拟。在笛卡尔坐标系下 ,采用交错网格的有限体积法求解二维不可压 Navier- Stokes方程 ,计算结果与试验数据以及与采用标准的 k- ε两方程湍流模型计算的结果进行比较 ,结果表明基于 RNG方法的湍流模型对于有强漩滚回流的尾流的详细结构 ,能够给出真实的模拟 .

The RNG k-ε turbulent model was adopted to simulate the turbulent flow around sill. The incompressible N-S equations were solved in a non-orthogonal curvilinear system by the finite volume method with staggered grids. The results were compared with the experimental data, which showed that the RNG k-ε turbulent model was feasible in simulating a separated flow around sill in pumping station.