On the role of oxygen in dielectric barrier discharge actuation of aerodynamic flows

Journal Article · Mon Oct 29 00:00:00 EDT 2007 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2803755· OSTI ID:21013755

Kim, W; Do, H; Mungal, M G; Cappelli, M A ^[1]

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1. Mechanical Engineering Department, Stanford University, Stanford, California 94305-3032 (United States)

Phase-locked particle image velocimetry is used to study the mechanism of induced flow in the near field of a rf dielectric barrier discharge actuator mounted in the separated flow region of a bluff body. Flow actuation is found to be asymmetric, with suction toward the buried downstream electrode when it is biased positively relative to the upstream exposed electrode. Lesser flow is seen on the reverse voltage swing, where the buried electrode should attract positive ions. This phenomenon is enhanced when oxygen is added to the flow, suggesting that oxygen negative ions, possibly O{sub 2}{sup -}, play a dominant role in plasma actuation.

• OSTI ID: 21013755
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 18 Vol. 91; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACTUATORS
AERODYNAMICS
ANIONS
ASYMMETRY
CATIONS
DIELECTRIC MATERIALS
ELECTRIC POTENTIAL
ELECTRODES
ELECTROHYDRODYNAMICS
OXYGEN
PLASMA