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首页> 外文期刊>International Journal of Heat and Mass Transfer >Steady dynamical behaviors of novel viscous pump with groove under the rotor
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Steady dynamical behaviors of novel viscous pump with groove under the rotor

机译：新型带转子凹槽的粘性泵的稳态动力特性

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摘要

A novel viscous pump with groove under the rotor in straight channel is first analyzed, and associated flow dynamic behaviors and characteristics are numerically investigated by 2-D laminar model. As Reynolds number rises, the vortices near the rotor become asymmetrical and larger, and then the dimen-sionless flow flux drops, while the dimensionless driving power rises. The groove height can also play an important role in the dynamical performance of the viscous pump. As the groove height increases, the dimensionless flow flux will first increase and then decrease, and it reaches maximum with optimal groove height. For small groove height, the flow passage with positive x-velocity is extended near the rotor, so the flow flux increases with groove height. For large groove height, the vortices in the upstream and downstream regions can combine into one large vortex, and the flow flux is obviously reduced. The driving power also affects the dynamic performance of viscous pump, and it is dependent upon the wall shear stresses at the rotor interface. In the narrow gap between the groove and rotor, thin film flow exists, so the wall shear stresses adjacent to the groove are much larger than those away from the groove, and the shear stresses will reach maximum near the groove edge. As a result, the dimensionless driving power of rotor will increase with the groove height but decrease with the gap width.
机译：首先分析了新型粘性泵，该粘性泵在直通道中的转子下方具有凹槽，并通过二维层流模型数值研究了相关的流体动力学行为和特性。随着雷诺数的增加，转子附近的涡旋变得不对称且更大，然后无量纲的通量下降，而无量纲的驱动力则上升。凹槽高度也可以在粘性泵的动态性能中发挥重要作用。随着凹槽高度的增加，无因次流量会先增大然后减小，并且在最佳凹槽高度时达到最大。对于较小的凹槽高度，具有正x速度的流道在转子附近延伸，因此流通量随凹槽高度而增加。对于较大的凹槽高度，上游和下游区域的涡流可以合并为一个大涡流，并且流量明显减小。驱动力还会影响粘性泵的动态性能，并且取决于转子界面处的壁切应力。在凹槽和转子之间的狭窄间隙中，存在薄膜流动，因此与凹槽相邻的壁面剪应力要比远离凹槽的壁面剪应力大得多，并且剪应力将在凹槽边缘附近达到最大。结果，转子的无量纲驱动力将随槽高而增加，而随间隙宽度而减小。

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  • 来源
  • 作者

    Lu Jianfeng; Ding Jing; Yang Jianping; Yang Xiaoxi;

  • 作者单位

    School of Engineering, Sun Yat-Sen University, Guangzhou 510006, China;

    School of Engineering, Sun Yat-Sen University, Guangzhou 510006, China;

    Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Ministry of Education, South China University of Technology, Guangzhou 510640, China;

    School of Engineering, Sun Yat-Sen University, Guangzhou 510006, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Viscous pump; Micro system; Vortex; Groove; Driving power;

    机译：粘性泵;微型系统;涡流;槽;驱动力;

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