Experimental Analysis of Alternative Dielectric Materials for DBD Plasma Actuators

F. Rodrigues, José C. Páscoa, M. Trancossi
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引用次数: 10

Abstract

Dielectric Barrier Discharge plasma actuators are simple devices with great potential for active flow control applications. They have very interesting features which have made them a topic of interest for many researchers, for instance they present very low mass, fast response time, low cost, easy implementation and they are fully electronic with no moving parts. The dielectric material used in the construction of these devices present an important role in their performance. The variety of dielectrics studied in the literature is very restrict and the majority of the authors make use of Kapton, Teflon, Macor ceramic or PMMA. Furthermore, several authors reported difficulties in the durability of the dielectric layer when actuators operate at high levels of voltage and frequency. Considering this background, the present study focus on the experimental testing of alternative dielectric materials which can be used for DBD plasma actuators fabrication. Considering this, plasma actuators with dielectric layers made of Poly-Isobutylene rubber, Poly-Lactic acid and Acetoxy Silicon were experimentally tested. Although these dielectric materials are not commonly used in plasma actuators, their values of dielectric strength and dielectric permittivity indicate they can be good solutions. The plasma actuators facbricated with these alternative dielectric materials were experimentally analysed in terms of electrical characteristics and induced flow velocity, and the obtained results were compared with an actuator made of Kapton which is, currently, the most common dielectric material for plasma actuators. The effectiveness of the actuators was estimated and the advantages and disadvantages of the use of each dielectric material were discussed.
DBD等离子体致动器介质材料选择的实验分析
介质阻挡放电等离子体致动器是一种简单的装置,在主动流量控制应用中具有很大的潜力。它们具有非常有趣的特性,这使它们成为许多研究人员感兴趣的话题,例如,它们具有非常低的质量,快速响应时间,低成本,易于实现,并且它们是完全电子的,没有移动部件。在这些器件的结构中使用的介电材料在其性能中起着重要作用。文献中研究的电介质种类非常有限,大多数作者使用卡普顿、特氟龙、马克陶瓷或PMMA。此外,一些作者报告了当执行器在高电压和高频率下工作时,介电层的耐久性存在困难。在此背景下,本文对可用于制造DBD等离子体致动器的替代介电材料进行了实验研究。为此,对以聚异丁烯橡胶、聚乳酸和乙酰氧基硅为介质层的等离子体作动器进行了实验研究。虽然这些介质材料不常用于等离子体致动器,但它们的介电强度和介电常数值表明它们可以是很好的解决方案。实验分析了用这些介质材料制作的等离子体致动器的电学特性和感应流速,并与目前最常用的介质材料卡普顿(Kapton)制成的致动器进行了比较。评估了各致动器的有效性,并讨论了每种介质材料使用的优缺点。
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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