Influence of reduced electric field (E/n) on plasma-assisted low-temperature oxidation

Patel, RB and Oommen, CK and Joy Thomas, M (2020) Influence of reduced electric field (E/n) on plasma-assisted low-temperature oxidation. In: Journal of Propulsion and Power, 36 (2). pp. 235-247.

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Abstract

This paper presents a study on the effect of a reduced electric field (E/N) on a premixed methane�air mixture oxidation at low temperature (less than 600 K). A coaxial reactor designed and built for the experiments has the flexibility to be configured for various discharge gaps and pressure conditions such that the discharge can be operated at various E/N. Volumetric dielectric barrier discharge plasma was established using 30 kV nanosecond pulses with repetition rates up to 3.5 kHz. A gas chromatographic technique was employed for product species characterization and quantification. The underscoring feature was the low-temperature ignition for 3 mm discharge gap cases, but no ignition was observed for 2 and 1 mm discharge gaps at atmospheric pressure. The effect of pressure on the low-temperature oxidation was also systematically examined. Discharge gaps of 3 and 2 mm followed a similar trend with pressure variation. Maximum combustion efficiency was observed for approximated E/N values close to 200 Td, whereas no conversion was observed after an E/N value of 350 Td for both discharge gaps. Electron energy branching calculations using BOLSIG+ and a plasma kinetics simulation using ZdPlaskin software were done to support the observations made during the experiments. © 2019 by the American Institute of Aeronautics and Astronautics, Inc.

Item Type:	Journal Article
Publication:	Journal of Propulsion and Power
Publisher:	AMER INST AERONAUTICS ASTRONAUTICS
Additional Information:	The copyright of this article belongs to AMER INST AERONAUTICS ASTRONAUTICS
Keywords:	Atmospheric pressure; Atmospheric temperature; Computer software; Dielectric materials; Electron energy levels; Gas chromatography; Oxidation; Pulse repetition rate, Chromatographic techniques; Combustion efficiencies; Dielectric barrier discharge plasmas; Effect of pressure; Low-temperature oxidation; Pressure conditions; Pressure variations; Species characterization, Electric discharges
Department/Centre:	Division of Electrical Sciences > Electrical Engineering Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited:	25 Jun 2020 08:13
Last Modified:	25 Jun 2020 08:13
URI:	http://eprints.iisc.ac.in/id/eprint/64826

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