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Turbulence and entrainment in an atmospheric pressure dielectric barrier plasma jet

Lookup NU author(s): Dr Richard Whalley

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

Abstract

© 2019 The Authors. Plasma Processes and Polymers published by Wiley-VCH Verlag GmbH & Co. KGaAParticle image velocimetry, laser-induced fluorescence, and computational modeling are used to quantify the impact of plasma generation on air entrainment into a helium plasma jet. It is demonstrated that discharge generation yields a minor increase in the exit velocity of the gas. In contrast, the laminar to turbulent transition point is strongly affected, attributed to an increase in plasma-induced perturbations within the jet shear layer. The temporal decay of laser-induced fluorescence from OH is used as an indicator of humid air within the plasma. The results show that plasma-induced perturbations increase the quenching rate of the OH-fluorescent state; indicating that shear-layer instabilities play a major role in determining the physicochemical characteristics of the plasma.

Publication metadata

Author(s): Morabit Y, Whalley RD, Robert E, Hasan MI, Walsh JL

Publication type: Article

Publication status: Published

Journal: Plasma Processes and Polymers

Year: 2019

Volume: 17

Issue: 6

Print publication date: 01/06/2020

Online publication date: 20/12/2019

Acceptance date: 08/12/2019

Date deposited: 07/01/2020

ISSN (print): 1612-8850

ISSN (electronic): 1612-8869

Publisher: Wiley-VCH Verlag

URL: https://doi.org/10.1002/ppap.201900217

DOI: 10.1002/ppap.201900217

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