Development of DBD plasma actuators: the double encapsulated electrode

Erfani, R., Zare-Behtash, H., Hale, C. and Kontis, K. (2015) Development of DBD plasma actuators: the double encapsulated electrode. Acta Astronautica, 109, pp. 132-143. (doi:10.1016/j.actaastro.2014.12.016)

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Abstract

Plasma actuators are electrical devices that generate a wall bounded jet without the use of any moving parts. For aerodynamic applications they can be used as flow control devices to delay separation and augment lift on a wing. The standard plasma actuator consists of a single encapsulated (ground) electrode. The aim of this project is to investigate the effect of varying the number and distribution of encapsulated electrodes in the dielectric layer. Utilising a transformer cascade, a variety of input voltages are studied for their effect. In the quiescent environment of a Faraday cage the velocity flow field is recorded using particle image velocimetry. Through understanding of the mechanisms involved in producing the wall jet and the importance of the encapsulated electrode a novel actuator design is proposed. The actuator design distributes the encapsulated electrode throughout the dielectric layer. The experiments have shown that actuators with a shallow initial encapsulated electrode induce velocities greater than the baseline case at the same voltage. Actuators with a deep initial encapsulated electrode are able to induce the highest velocities as they can operate at higher voltages without breakdown of the dielectric.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Zare-Behtash, Dr Hossein and Kontis, Professor Konstantinos
Authors: Erfani, R., Zare-Behtash, H., Hale, C., and Kontis, K.
Subjects:Q Science > Q Science (General)
Q Science > QC Physics
T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Journal Name:Acta Astronautica
Publisher:Elsevier on behalf of IAA
ISSN:0094-5765
ISSN (Online):1879-2030
Copyright Holders:Copyright © 2015 IAA
First Published:First published in Acta Astronautica 109:132-143
Publisher Policy:Reproduced under a Creative Commons License

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