Electrohydrodynamic pumps are bladeless alternatives to rotary pumps. However, evaluating the performance of electrohydrodynamic pumps without blockage effects is misleading. This paper presents the blockage-induced performance changes for needle-ring electrohydrodynamic pumps concerning pump size at constant flow scattering. The results indicate that the blockage affects larger pumps more than smaller ones. The corona power increases over blockage under constant current mode but decreases over blockage under constant voltage mode. The flow rate decreases over blockage regardless of driving mode. Consequently, the efficiency decreases over blockage under constant current mode but does not change much over blockage under constant voltage mode.

电液动力泵是旋转泵的无叶片替代品。然而，在没有堵塞效应的情况下评估电流体动力泵的性能具有误导性。本文介绍了针环电流体动力泵的堵塞引起的性能变化，这些变化与恒定流量散射下的泵尺寸有关。结果表明，堵塞对大型泵的影响大于对小型泵的影响。恒流模式下电晕功率随阻塞而增加，而恒压模式下随阻塞而减小。无论驾驶模式如何，流量都会随着阻塞而降低。因此，在恒流模式下效率随着阻塞而降低，但在恒压模式下随着阻塞而变化不大。