Corona Discharge in Wind for Electrically Isolated Electrodes
Name
2020JD032908.pdf
Description
Published version
Size
5.64 MB
Format
Adobe PDF
Checksum (MD5)
33a171ed7cb878b8b95f133989af2ea0
Author(s)
Guerra-Garcia, C
Nguyen, NC
Mouratidis, T
Martinez-Sanchez, M
Date Issued
2020
Journal
Journal of Geophysical Research: Atmospheres
Publisher
American Geophysical Union (AGU)
Version
Final published version
Abstract
©2020. American Geophysical Union. All Rights Reserved. For various problems in atmospheric electricity it is necessary to understand the behavior of corona discharge in wind. Prior work considers grounded electrode systems, of relevance for earthed towers, trees, or windmills subjected to thunderstorms fields. In this configuration, the effect of wind is to remove the shielding ions from the coronating electrode vicinity strengthening the corona and increasing its current. There are a number of cases, such as isolated wind turbine blades or airborne vehicles, that are not completely represented by the available models and experiments. This paper focuses on electrode systems that are electrically isolated from their environment and reports on a wind tunnel campaign and accompanying theoretical work. In this configuration, there are two competing effects: the removal of the shielding ions by the wind, strengthening the corona; and the electrode system charging negatively (for positive corona) with respect to its environment, weakening the corona. This leads to three different operating regimes; namely, for positions that favor ion recapture, charging is limited and current increases with wind as in the classical scaling; for positions that favor ion transport by the wind, the system charges negatively and the current decreases with wind; for the later configuration, as wind increases, the current can vanish and the system potential saturates. The results from this work demonstrate that classical scaling laws of corona discharge in wind do not necessarily apply for isolated electrodes and illustrate the feasibility of using a glow corona in wind for controlled charging of a floating body.
MIT Department
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
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Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1029/2020JD032908
