Numerical analysis of the effect of an EHD actuator on the flow past a square cylinder

P. Traoré, C. Louste
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引用次数: 2

Abstract

In this paper we demonstrate how it is possible to control the flow of a dielectric liquid past a square cylinder with a simple actuator based on three electrodes ideally placed on its surface. Two-dimensional numerical simulations coupling the flow and the EHD equations have been undertaken and the vortex shedding occurring when the Reynolds number is high enough has been controlled. Indeed, the secondary flow induced by the electric charge injected from the two emitters electrodes interacts with the primary flow and suppresses the vortex shedding and wipe out the Karman vortex street supposed to evolve in the wake for a short while. Later, the flow recovers its periodic structure but this time the frequency and amplitude of the vortex shedding is clearly decreased. Flow patterns are displayed showing this effect.
EHD作动器对方圆柱流场影响的数值分析
在本文中,我们演示了如何用一个基于理想放置在其表面的三个电极的简单驱动器来控制介电液体流过方形圆柱体的可能性。对流动和EHD方程进行了二维数值模拟,控制了雷诺数足够高时发生的旋涡脱落。事实上,由两个发射电极注入的电荷引起的二次流与初级流相互作用,抑制了旋涡脱落,并在短时间内消除了应该在尾迹中发展的卡门旋涡街。随后,流动恢复其周期结构,但此时旋涡脱落的频率和幅度明显减小。流模式显示了这种效果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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