Modeling non-equilibrium discharge and validating transient plasma characteristics at above-atmospheric pressure

Scarcelli, Riccardo; Wallner, Thomas; Som, Sibendu; Biswas, Sayan; Ekoto, Isaac; Breden, Douglas; Karpatne, Anand; Raja, Laxminarayan L.

doi:10.1088/1361-6595/aaf539

Modeling non-equilibrium discharge and validating transient plasma characteristics at above-atmospheric pressure

Journal Article · Fri Dec 28 00:00:00 EST 2018 · Plasma Sources Science and Technology

DOI:https://doi.org/10.1088/1361-6595/aaf539· OSTI ID:1489223

^[1]; Wallner, Thomas ^[1]; Som, Sibendu ^[1]; ^[2]; Ekoto, Isaac ^[3]; Breden, Douglas ^[4]; Karpatne, Anand ^[4]; Raja, Laxminarayan L. ^[5]

Argonne National Lab. (ANL), Argonne, IL (United States)
Sandia National Lab. (SNL-CA), Livermore, CA (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Esgee Technologies, Austin, TX (United States)
The Univ. of Texas at Austin, Austin, TX (United States)

Non-equilibrium plasma generated from positive-pulsed nanosecond electrical discharges into desiccated air is simulated in this paper using a multi-dimensional, multi-physics plasma solver. A pin-to-pin electrode configuration is used with a fixed 5.2 mm gap spacing. Peak pulse voltages range between 10.2 and 22.5 kV. Care is taken to match the exact electrode profile from the experiments, and adjust the electron collision frequency so that breakdown limits closely match those from corresponding experimental results. The optimized numerical simulations predict qualitative streamer structure that is in close agreement with experimental observations. Quantitative measurements of atomic oxygen at the anode tip and qualitative estimates of streamer gas heating are closely matched by simulations. The model results are used to provide insight into the spatial and temporal development of the transient plasma. Furthermore, the work performed in this paper delivers a numerical tool that can be extremely useful to link the post-discharge plasma properties to low-temperature plasma ignition mechanisms that are of great interest for the automotive industry.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1489223

Alternate ID(s):: OSTI ID: 22996645

Journal Information:: Plasma Sources Science and Technology, Journal Name: Plasma Sources Science and Technology Journal Issue: 12 Vol. 27; ISSN 1361-6595

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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