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为了对垂直转子轴式黏性泵内部流动规律进行研究,采用格子Boltzmann法(LBM)对该泵模型全流场进行了数值模拟。采用具有二阶精度的弯曲固壁边界条件和基于插值公式的移动固壁边界条件,对具有圆形、矩形及方形等3种不同截面形状转轴的模型泵内部定常与非定常流动进行了计算,得到了模型泵体出口剖面处x方向速度分量平均值。结果表明,具有圆形截面形状转轴的泵送效果较另两种截面形状的转轴为佳,计算所得的出口剖面处x方向速度分量平均值与文献中实验结果吻合良好。
In order to study the internal flow law of the vertical rotor axial viscous pump, the Lattice Boltzmann method (LBM) was used to simulate the full flow field of the pump model. The curved and solid-wall boundary conditions with second-order precision and the boundary condition of moving solid-wall based on the interpolation formula are used to calculate the steady and unsteady flow in the model pump with three different cross-section shapes, such as circular, rectangular and square. The average velocity component in the x direction at the exit of the model pump body was obtained. The results show that the pump with circular cross-section shaped shaft is better than the other two cross-sectional shaped shaft, and the calculated average velocity component in the x-direction at the exit cross section is in good agreement with the experimental results in the literature.