Journal
JOURNAL OF ELECTROSTATICS
Volume 72, Issue 1, Pages 76-81Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.elstat.2013.11.010
Keywords
Ionic wind; Corona discharge; Active area; Wind pressure; Self-rotation
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Funding
- National Key Laboratory of Science and Technology on Electro-mechanical Dynamic Control, China [2011C3606]
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The DC corona discharge in air and the induced ionic wind were investigated in the needle-to-water system at atmospheric pressure. The water deformation was measured under various conditions, and wind pressure and active areas were estimated accordingly. The effects of applied voltage, gap spacing and tip radius on the corona ionic wind were studied and the qualitative analysis was provided. Self-rotation of corona discharge was observed in experiments. The results show that higher voltage or electric field strength results in a stronger ionic wind. The active area increases with applied voltage below a voltage threshold. There is an optimal gap distance for a wider as well as stronger ionic wind and blunter needle we used leads to an enhancement on both the active area and the wind strength. The wind velocity reaches 7 m/s at optimized condition in the present system. The rotation of corona discharge helps to improve the active area and uniformity of the treating area which may be associated with the chemical reaction of the water surface. (C) 2013 Elsevier B.V. All rights reserved.
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