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Control of an axisymmetric subsonic air jet by plasma actuator

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Abstract

It is known that surface non-thermal plasma actuators have proved their efficiency for aerodynamics flow control. In this study, a dielectric barrier discharge (DBD) is mounted on the diffuser of an axisymmetric turbulent air jet in order to control the flow separation along a 12-degree diffuser bevel. The momentum created by the actuator is applied to separate an air flow naturally attached to the diffuser for air flow velocity up to 40 m s−1. Laser sheet visualizations and LDV measurements are achieved to characterize the unforced and forced air jet. The flow separation, the induced velocity fluctuations, the jet mixing improvement and vectoring are investigated. The main results of this study demonstrate that DBD actuators are suitable to fully detach the air flow along the bevel for a velocity of 20 m s−1 and that a jet vectoring between 13.5° and 5.5° could be achieved for velocity ranging between 20 and 40 m s−1. Considerations about a potential improvement of the jet mixing are also introduced and the laser sheet visualization attests that induced flow perturbations are highly 3D.

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Acknowledgements

The authors thank AIRBUS for its financial and technical support (contract #D05028043), under the scientific direction of Dr. Stephen Rolston, and J.P. Bonnet and J. Delville (CEAT, Poitiers) for helping us in designing the diffuser geometry and for theirs advices. We also acknowledge J.C. Jouvanneau for the fabrication of the experimental diffusers and P. Braud for the technical assist.

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  1. Laboratoire d’Etudes Aérodynamiques, Bld Marie et Pierre Curie, 86962, Chasseneuil, France

    N. Benard, J. Jolibois, M. Forte, G. Touchard & E. Moreau

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  1. N. Benard
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  2. J. Jolibois
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  3. M. Forte
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  4. G. Touchard
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  5. E. Moreau
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Correspondence to N. Benard.

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Benard, N., Jolibois, J., Forte, M. et al. Control of an axisymmetric subsonic air jet by plasma actuator. Exp Fluids 43, 603–616 (2007). https://doi.org/10.1007/s00348-007-0344-9

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  • DOI: https://doi.org/10.1007/s00348-007-0344-9

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