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

Active flow control over a backward-facing step using plasma actuation
Active flow control over a backward-facing step using plasma actuation
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.
0094-5765
354-363
Ruisi, R.
c89a060b-c8d9-4480-9e29-392777d47533
Zare-Behtash, H.
74be9b97-cb09-49c6-9f75-7ec58c0dd16c
Kontis, K.
8e534eab-6495-4dcb-ab48-e2a8906bcd8a
Erfani, R.
5faec29e-6e26-44a8-9d2c-a67ebdcedc82
Ruisi, R.
c89a060b-c8d9-4480-9e29-392777d47533
Zare-Behtash, H.
74be9b97-cb09-49c6-9f75-7ec58c0dd16c
Kontis, K.
8e534eab-6495-4dcb-ab48-e2a8906bcd8a
Erfani, R.
5faec29e-6e26-44a8-9d2c-a67ebdcedc82

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, 354-363. (doi:10.1016/j.actaastro.2016.05.016).

Record type: Article

Abstract

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.

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More information

Accepted/In Press date: 14 May 2016
e-pub ahead of print date: 17 May 2016
Published date: 24 May 2016

Identifiers

Local EPrints ID: 490947
URI: http://eprints.soton.ac.uk/id/eprint/490947
ISSN: 0094-5765
PURE UUID: e4b80bcd-2f95-438a-8409-0bfbc3ff4987
ORCID for H. Zare-Behtash: ORCID iD orcid.org/0000-0002-4769-4076

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Date deposited: 10 Jun 2024 16:38
Last modified: 11 Jun 2024 02:09

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Contributors

Author: R. Ruisi
Author: H. Zare-Behtash ORCID iD
Author: K. Kontis
Author: R. Erfani

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