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Open AccessArticle

Experimental Investigation on the Influence of Target Physical Properties on an Impinging Plasma Jet

1
Department of Industrial Engineering (DIN), Alma Mater Studiorum-Università di Bologna, 40131 Bologna, Italy
2
Presently at GREMI, UMR7344 CNRS/Université d’Orléans, 45067 Orléans, France
3
CIRI—Advanced Applications in Mechanical Engineering & Materials Technology, Alma Mater Studiorum—Università di Bologna, 40131 Bologna, Italy
*
Author to whom correspondence should be addressed.
Plasma 2019, 2(3), 369-379; https://doi.org/10.3390/plasma2030029
Received: 15 July 2019 / Revised: 30 August 2019 / Accepted: 11 September 2019 / Published: 16 September 2019
(This article belongs to the Special Issue Low Temperature Plasma Jets: Physics, Diagnostics and Applications)
The present work aims to investigate the interaction between a plasma jet and targets with different physical properties. Electrical, morphological and fluid-dynamic characterizations were performed on a plasma jet impinging on metal, dielectric and liquid substrates by means of Intensified Charge-Coupled Device (ICCD) and high-speed Schlieren imaging techniques. The results highlight how the light emission of the discharge, its time behavior and morphology, and the plasma-induced turbulence in the flow are affected by the nature of the target. Surprisingly, the liquid target induces the formation of turbulent fronts in the gas flow similar to the metal target, although the dissipated power in the former case is lower than in the latter. On the other hand, the propagation velocity of the turbulent front is independent of the target nature and it is affected only by the working gas flow rate. View Full-Text
Keywords: impinging jet; metal/dielectric/liquid substrate; ICCD imaging; high-speed Schlieren imaging; plasma discharge morphology; turbulence impinging jet; metal/dielectric/liquid substrate; ICCD imaging; high-speed Schlieren imaging; plasma discharge morphology; turbulence
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Simoncelli, E.; Stancampiano, A.; Boselli, M.; Gherardi, M.; Colombo, V. Experimental Investigation on the Influence of Target Physical Properties on an Impinging Plasma Jet. Plasma 2019, 2, 369-379.

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