Active flow control over a backward-facing step using plasma actuation

Ruisi, R., Zare-Behtash, H. , Kontis, K. and Erfani, R. (2016) Active flow control over a backward-facing step using plasma actuation. Acta Astronautica, 126, pp. 354-363. (doi: 10.1016/j.actaastro.2016.05.016)

119419.pdf - Accepted Version



Due to the more stringent aviation regulations on fuel consumption and noise reduction, the interest for smaller and mechanically less complex devices for flow separation control has increased. Plasma actuators are currently among the most studied typology of devices for active flow control purposes due to their small size and lightweight. In this study, a single dielectric barrier discharge (SDBD) actuator is used on a backward-facing step to assess its effects on the separated turbulent shear layer and its reattachment location. A range of actuating modulation frequencies, related to the natural frequencies of shear layer instability (flapping) and vortex shedding instability, are examined. The particle image velocimetry technique is used to analyse the flow over the step and the reattachment location. The bulk-flow experiments show negligible effects both on the shear layer and on the reattachment location for every frequency considered, and the actuator is not able to induce a sufficient velocity increase at the step separation point.

Item Type:Articles (Editorial)
Additional Information:The authors are grateful for the technical help and support of Dr. K.H. Lo, and the useful discussions of Prof. S. Roy. This work was supported by the 7th Framework Program FP7/2010–2013 MARS (Grant agreement number 266326).
Glasgow Author(s) Enlighten ID:Kontis, Professor Konstantinos and Zare-Behtash, Dr Hossein
Authors: Ruisi, R., Zare-Behtash, H., Kontis, K., and Erfani, R.
Subjects:Q Science > Q Science (General)
Q Science > QC Physics
T Technology > T Technology (General)
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Journal Name:Acta Astronautica
Published Online:17 May 2016
Copyright Holders:Copyright © 2016 IAA
First Published:First published in Acta Astronautica 126: 354-363
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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