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Wall Normal Jet Produced by DBD Plasma Actuator With Doughnut-Shaped Electrode

[+] Author Affiliations
Takehiko Segawa, Hiro Yoshida

National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan

Shinya Takekawa

Powers System Integrate Inc., Kawagoe, Saitama, Japan

Timothy Jukes, Kwing-So Choi

University of Nottingham, University Park, Nottingham, UK

Paper No. FEDSM2008-55020, pp. 465-472; 8 pages
doi:10.1115/FEDSM2008-55020
From:
  • ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences
  • Volume 1: Symposia, Parts A and B
  • Jacksonville, Florida, USA, August 10–14, 2008
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-4840-1 | eISBN: 0-7918-3832-3
  • Copyright © 2008 by ASME

abstract

Properties of coaxial annular jets produced by a dielectric barrier discharge (DBD) plasma actuator with a doughnut shaped electrodes were investigated under atmospheric pressure and room temperature. The actuator consists of two circular electrodes sandwiching a thin dielectric layer. By applying 0 – ±3.3 kV between the electrodes at radio frequencies, the plasma jet is formed near the inner edge of the top electrode. The radial jet runs toward the center of the electrode and then impinges at the center to generate a wall normal annular jet. The evolution of the wall normal jet was observed precisely using particle image velocimetry (PIV) system. It was found that characteristic velocities increase in proportion to the bursting frequency and inversely proportional to the inner diameter of the electrode at the surging time of the voltage at 5.0 × 10−6 sec.

Copyright © 2008 by ASME

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