EHD Induction Pumping in Annuli
EHD Induction Pumping in Annuli
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环形 EHD 感应泵
DOI：
10.1109/tei.1985.348863
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发表时间：
1984
期刊：
影响因子：
--
通讯作者：
J. Chato
中科院分区：
文献类型：
--
作者：
J. Crowley;Paul S. H. Chang;Daniel I. Riley;J. Chato
EHD泵通常封闭在圆形管道中，但以前对这种泵的分析通常是在二维几何形状中进行的，这些几何形状不能代表与管道相关的曲率和有限尺寸。EHD感应泵的一个实际版本包括沿接地圆柱形管的中心沿着延伸的有源行波电极。层流发生在管道和电极之间的环形空间的理论建模的感应电荷层位于一个任意距离的中心电极。如果存在异质电荷层，则产生吸引泵送，其中流体跟随电场波。对于同质电荷层，发生排斥泵浦。各种电激励和几何形状选择的流速计算是电压、频率和电荷层位置的函数。吸引泵和重负载排斥泵都在单一非零频率下产生最大流量，但轻负载排斥泵在直流下运行最佳。这些结果的影响进行了讨论的背景下，几个应用程序。
EHD pumps will normally be enclosed in circular pipes, but previous analysis of such pumps was most often undertaken in two-dimensional geometries which cannot represent the curvature and finite size associated with a pipe. One practical version of an EHD induction pump includes an active travelling wave electrode running along the center of a grounded cylindrical pipe. Laminar flow which takes place in the annulus between pipe and electrode is modeled theoretially in terms of an induced charge layer situated at an arbitrary distance from the center electrode. If a hetero-charge layer is present, attraction pumping, in which the fluid follows the electric field wave, results. For a homo-charge layer, repulsion pumping occurs. Calculation of flow rates for various choices of electrical excitation and geometry are given as functions of voltage, frequency, and location of the charge layer. The attraction pump and the heavily loaded repulsion pump both give maximum flow rates at a single non-zero frequency, but the lightly loaded repulsion pump operates best at dc. The implications of these results are discussed in the context of several applications.