基于RNG湍流模型的泵站进水流道三维数值模拟

3D Numerical Simulation in Inlet Passages of Pumping Station by RNG k-ε Turbulent Model with Wall-function Law

运用基于壁面律的RNGk-ε湍流模型对新型空心桩式水泵站进水流道进行数值模拟,采用交错网格的有限体积法求解三维不可压Navier-Stokes方程,提出优化进水流道目标函数并依据数值模拟结果预测进水流道水力损失。根据经验公式计算的水力损失与预测的进水流道水力损失较为接近,表明采用RNGk-ε湍流模型能较好地预测进水流道的水力性能,对进水流道内特性数值模拟和外特性预测研究有较高的推广价值。

Pumping station inlet is an important part of the pumping station. The RNG k-ε turbulent model with wallfunction law is firstly applied to simulate the inlet passages of pumping station. The incompressible N-S equations are solved by the finite volume method with a staggered grid in a non-orthogonal curvilineal system. The optimum function of inlet passage is proposed,and the numerical loss of head is given. A good agreement is achieved between prediction data and experience data. The RNG k-ε turbulent model with wall-function law can be used to simulate flow and loss of head in the passages of the pumping station.