论文部分内容阅读
为了对垂直转子轴式微型泵内部流动规律进行深入研究,采用格子Bo ltzm ann法(LBM)对该微型泵全流场进行了数值模拟。采用基于插值公式及固壁处动量平衡的弯曲固壁统一边界条件和移动边界条件,对具有圆、椭圆、互垂直双椭圆等3种不同截面形状转轴的微型泵内部流动进行了定常与非定常的计算,得到了微型泵进出口处平均压差、出口处平均量纲一化速度随时间的演化过程。结果表明:随着R eyno lds数的减小,流体的粘性作用不断增大,垂直转子轴结构可对流体进行更加有效的输送;圆形截面转轴比椭圆和互垂直双椭圆截面转轴具有更好的泵送性能。
In order to further study the internal flow of the vertical rotor micro-pump, the whole flow field of the micro-pump was numerically simulated by the lattice Bo ltzm ann method (LBM). The interior and exterior flow of micropumps with three kinds of cross-sectionally shaped circular shafts, such as circle, ellipse and vertical double oval, were investigated by using the unified boundary conditions of bending and solid wall and the moving boundary conditions based on the interpolation formula and the momentum balance of the fixed wall. The average pressure at the inlet and outlet of the micro-pump was obtained and the evolution of the mean velocity at the outlet was evolved over time. The results show that with the decrease of Reynolds number, the viscosity of the fluid increases continuously, and the vertical rotor axis structure can transport the fluid more effectively. The circular cross section axis has better performance than the ellipse and the perpendicular double oval cross section axis Pumping performance.