基于重整化群湍流模型的双向轴流泵出水结构研究

双向轴流泵装置是一种特殊的泵站形式．结合某泵站技术改造，运用三维湍流数值模拟技术对其出水结构进行研究．基于定常不可压流体的控制方程和重整化群湍流模型，应用SIMPLEC算法，数值模拟了X型双向流道泵装置三种出水结构方案内三维湍流流场．通过给出计算流速矢量分布图、流速等值线图，直观地显示了出水结构内水流流场情况．分析表明，设计控制参数不合理是导致出水结构内部流态较差的主要原因，不良流态引起水力损失增加．文中依据数值模拟结果，预测出水结构水力损失，并与实验进行了比较，表明通过采用重整化群湍流模型能较好地预测双向泵出水结构的水力性能．重整化群湍流模型在泵装置内特性数值模拟和外特性预测研究方面中有较好的推广价值．

RNG Turbulent Model-based Numerical Simulation of Outlet Passages on Reversible Pump

The outlet passage of reversible pumping system, which is a special type of pump, invented by Chinese researcher. In order to find out the characteristic of flow field, the RNG k-6 turbulent model is applied to simulate the flow of the outlet passage The incompressible N-S equations are solved in a non-orthogonal curvilinear coordinate system by the finite volume method with a staggered grid. The result, such as the flow velocity distribution and isolines of velocity on the outlet of passage, show full flow passage. It is indicated that bad flow pattern caused hydraulic loss. The numerical hydraulic loss of three passages was given. A good agreement was achieved between prediction data with experience data. The RNG k-6 turbulence model could be used to simulate flow field and loss of head in the passages of pumping station.