Chung Ji Hong, Sohn Dong Kee, Ko Han Seo
School of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea.
Department of Smart Fab. Technology, Sungkyunkwan University, Suwon 16419, Republic of Korea.
Micromachines (Basel). 2023 Aug 16;14(8):1614. doi: 10.3390/mi14081614.
Ionic wind, which is generated by a corona discharge, is a promising field that offers significant advantages by directly converting electrical energy into kinetic energy. Because of the electrical characteristics of ionic wind, most studies aiming to improve the performance of ionic wind generators have focused on modifying the geometry of electrode configurations. A mesh-type electrode is one of the electrodes used as a collecting electrode in an ionic wind generator. Using a mesh electrode results in decreased momentum of the ionic wind and increased pressure drop due to frictional loss of the flow. In this study, to minimize the reduction in momentum, a mesh electrode with a central hole was proposed and investigated. Experiments were conducted with the configuration of a needle and mesh with the central hole. These experiments analyzed the effect of the central hole diameter and the distance between the needle and the mesh electrodes on the electrical and physical characteristics of the ionic wind. The addition of the central hole led to a higher average velocity and lower current, thus resulting in increased energy conversion efficiency. The presented configuration offers a simple geometry without electrical and physical interference from complex configurations, and it is considered to have the potential to improve energy conversion efficiency and optimize ionic wind flow.
电晕放电产生的离子风是一个很有前景的领域，它通过将电能直接转化为动能而具有显著优势。由于离子风的电学特性，大多数旨在提高离子风发电机性能的研究都集中在改变电极配置的几何形状上。网状电极是离子风发电机中用作集电极的电极之一。使用网状电极会导致离子风的动量降低，并且由于流动的摩擦损失而使压降增加。在本研究中，为了最小化动量的降低，提出并研究了一种带有中心孔的网状电极。采用针状电极和带有中心孔的网状电极的配置进行了实验。这些实验分析了中心孔直径以及针状电极与网状电极之间的距离对离子风的电学和物理特性的影响。中心孔的加入导致了更高的平均速度和更低的电流，从而提高了能量转换效率。所提出的配置具有简单的几何形状，不会受到复杂配置的电学和物理干扰，并且被认为具有提高能量转换效率和优化离子风流的潜力。
