旋流泵的流动规律

对80X-13.5型旋流泵进行了数值模拟计算,泵内部流动区域选用Pro/E造型,用Gambit软件采用分块非结构六面体网格划分方法对模型进行网格划分及部分边界条件的设定,运用雷诺平均N-S方程和标准k-ε双方程湍流模型结合SIMPLEC算法,来数值模拟旋流泵内部三维不可压湍流场.数值模拟计算选取工作介质为清水,并认为是牛顿流体且局部各向同性;认为旋流泵的内部流场是以定常角速度绕固定轴的旋转流场,属于复杂的三维不可压湍流流动.数值模拟得出了旋流泵内的速度和全压分布图,并试分析出了旋流泵的内部流动区域分布.分析认为,周向流动是旋流泵内部的主体流动趋势,旋流泵内部流动状态可归结为贯通流和循环流.数值模拟的结果验证了已有流动模型的正确性,并且在数值模拟基础上重新划分的流动区域可以反映清水条件下80X-13.5型旋流泵的内部流动情况,可为此种泵型旋流泵的设计提供参考.

Flow mechanism in votex-pump

The vortex pump of type 80X-13.5 was numerically simulated. The inner flow model was designed by Pro/E.Separated unstructured hexahedron grid partition and part of boundary condition were used by Gambit.Considering Reynolds Average N-S Equation and standard k-ε turbulence model with SIMPLEC algorithm,numerical simulation for the three-dimensional steady incompressible turbulent flow of the vortex-pump was carried out.The medium is water and the inner flow field of vortex pump is rotating flow with constant angular velocity,three dimensional,and incompressible turbulent flow.The distribution of velocity and total pressure were obtained in numerical simulation.The distribution area of flow are summed up.The circumferential flow is considered as the main flow and can be divided into run-through flow and circulatory flow.The result of numerical simulation testified the validity of the existing model and the new division of flow distribution of the vortex pump typed 80X-13.5.vortex-pump;numerical simulation;flow mechanism;pressure distribution;run-through flow;circulatory flow