Unsteady aspect of the electrohydrodynamic force produced by surface dielectric barrier discharge actuators

The time-resolved electrohydrodynamic force produced by single dielectric barrier discharge (DBD) actuators used for airflow control is computed from electric wind velocity measurements. Two actuator designs are investigated: a plate-to-plate and a wire-to-plate surface DBD because each of them prod...

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Bibliographic Details
Published in:Applied physics letters 2012-01, Vol.100 (1), p.013901-013901-3
Main Authors: Debien, A., Benard, N., David, L., Moreau, E.
Format: Article
Language:English
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Summary:The time-resolved electrohydrodynamic force produced by single dielectric barrier discharge (DBD) actuators used for airflow control is computed from electric wind velocity measurements. Two actuator designs are investigated: a plate-to-plate and a wire-to-plate surface DBD because each of them produces a different discharge current. Results show that: (1) the high voltage active electrode shape plays a key role in the plasma physics, (2) the body force is highly unsteady with fluctuations up to about ten times its time-averaged value, and (3) the typical plate-to-plate DBD produces a positive force during the positive half-cycle and a negative force during the negative half-cycle when both cycles result in a positive force with the wire-to-plate DBD.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3674308