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The Unsteady Fluid Flow Due to Corona Discharge in a System of Wire and Plate Electrodes

[+] Author Affiliations
Yusuke Imai, Hideyuki Mihira, Masatsugu Yoshizawa

Keio University, Yokohama, Japan

Yoshiaki Itoh

Kanagawa Industrial Technology Research Institute, Kanagawa, Japan

Paper No. IMECE2002-32172, pp. 303-310; 8 pages
doi:10.1115/IMECE2002-32172
From:
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • 5th International Symposium on Fluid Structure Interaction, Aeroelasticity, and Flow Induced Vibration and Noise
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Applied Mechanics Division
  • ISBN: 0-7918-3659-2 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME

abstract

Lateral oscillation of a wire electrode occurs when high dc voltage is applied between a wire and plate electrodes in an electrostatic field with corona discharge. The feature is that the horizontal component of the wire oscillation gradually increases and is excited with the fundamental natural frequency of the wire oscillation. We have already discussed the effects of the electrostatic and the fluid forces on the wire oscillation from the physical point of view. The fluid force on the wire due to corona wind was assumed to be one of main reasons for the outbreak mechanism of the wire oscillation. However, the outbreak mechanism of the wire oscillation has not been given yet. The main purpose of this paper is to examine another possible reason for the outbreak mechanism of the wire oscillation due to the fluid force. Some experiments are made to investigate whether oscillation of a non-conductive string, placed in the flow field, is excited by the fluid force or not. Moreover, the PIV (Particle Image Velocimetry) and the LDV (Laser Doppler Velocimeter) techniques are used to measure the flow field to confirm the hypothesis of the outbreak mechanism t hat the wire oscillation is excited due to the fluctuation of the fluid force on the wire.

Copyright © 2002 by ASME

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