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为研究垂直转子微小型泵的内部黏性流动,根据偏置于两平板间的转子两端剪切力不平衡的原理,设计了一种偏置式垂直转子微小型泵,并利用粒子成像测速(PIV)技术对泵体内部的黏性流动进行了可视化量测。根据N-S方程对微小型泵的内部粘性流动进行了数值模拟计算。用这2种方法均得到了泵体内部的流线分布、泵体出口端面的平均速度和体积流量与Reynolds数的关系曲线。比较和分析结果表明:当Reynolds数小于100时,泵体出口端面的平均速度、体积流量与Reynolds数基本成正比关系;随着Reynolds数的减小,流体的黏性作用相对增大,垂直转子微小型泵可对流体进行更加有效的输送。
In order to study the internal viscous flow of a micro rotor pump with vertical rotor, a biased vertical rotor micro pump is designed according to the unbalanced shear force biased at both ends of the rotor. (PIV) technology to visualize viscous flow inside the pump. According to the N-S equation, the internal viscous flow of a micro-pump is numerically simulated. Using these two methods, the streamline distribution inside the pump body, the average velocity at the exit end of the pump body and the relationship between the volume flow and the Reynolds number are obtained. The results of comparison and analysis show that when the Reynolds number is less than 100, the average velocity and volume flow at the exit end of the pump body are basically proportional to the Reynolds number. As the Reynolds number decreases, the viscosity of the fluid increases relatively. Micro-pumps deliver fluid more efficiently.