N<sub>2</sub> vibrational kinetics in near atmospheric pressure nanosecond-pulsed plasma jet: simulations validated against measurements

ORAL

Abstract

In this contribution, near atmospheric pressure nanosecond-pulsed plasma jets are investigated by a zero-dimensional volume-averaged model. The model calculations of N2(v<58) plasma are validated against the measured vibrational level densities (v<5). The Vibrational-Vibrational (V-V) and Vibrational-Translational (V-T) rate coefficients are determined from diverse theoretical approaches, i.e. the V-V kinetics from the simple form of an harmonic oscillator (sfHO), the Schwartz–Slawsky–Herzfeld (SSH) and the Forced Harmonic Oscillator (FHO). The V-T rate coefficients are determined via the sfHO and the fit functions of the quasi-classical trajectory and semi-classical calculations. The influences of these different approaches on the simulated time-dependent vibrational distribution functions are presented. A limited influence on the low vibrational level densities (v<5) is observed, whereas larger differences are shown in the concentrations of higher levels by using the aforementioned different approaches. The sensitivity of the vibrational distribution function to the neutral wall reaction probabilities is revealed, e.g. the wall quenching of the vibrationally excited nitrogen molecules plays a role in the intermediate and high level densities.

*This work is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - Project-ID 327886311 (SFB 1316: simulations by A9 and measurements by A2 & A1). VG was partially funded by the Portuguese FCT, under projects UIDB/50010/2020 and UIDP/50010/2020.

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Presenters

  • Youfan He

    • Ruhr-University Bochum

Authors

  • Youfan He

    • Ruhr-University Bochum

  • Jan Kuhfeld

    • Ruhr University Bochum, Faculty of Physics and Astronomy
    • Experimental Physics V, Faculty of Physics and Astronomy, Ruhr-University Bochum, Germany

  • Nikita D Lepikhin

    • Ruhr University Bochum, Faculty of Physics and Astronomy
    • Experimental Physics V, Faculty of Physics and Astronomy, Ruhr-University Bochum, Germany

  • Dirk Luggenhölscher

    • Ruhr University Bochum, Faculty of Physics and Astronomy
    • Experimental Physics V, Faculty of Physics and Astronomy, Ruhr-University Bochum, Germany

  • Uwe Czarnetzki

    • Ruhr University Bochum, Faculty of Physics and Astronomy
    • Ruhr Univ Bochum
    • Experimental Physics V, Faculty of Physics and Astronomy, Ruhr-University Bochum, Germany

  • Vasco Guerra

    • Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico - Universidade de Lisboa
    • Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
    • Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa
    • Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Portugal
    • Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal

  • Ralf Peter Brinkmann

    • Ruhr-University of Bochum
    • Institute of Theoretical Electrical Engineering, Faculty of Electrical Engineering and Information Technology, Ruhr-University Bochum, Germany

  • Andrew R Gibson

    • Research Group for Biomedical Plasma Technology, Faculty of Electrical Engineering and Information Sciences, Ruhr University Bochum, Bochum, Germany.
    • 1) Research Group for Biomedical Plasma Technology, Ruhr-Universität Bochum, Germany; 2) Institute for Electrical Engineering and Plasma Technology, Ruhr-Universität Bochum, Germ
    • Research Group for Biomedical Plasma Technology, Ruhr-University Bochum, Universitätsstraße 150 D-44801 Bo­chum, Germany
    • Ruhr University Bochum, Germany
    • Institute of Electrical Engineering and Plasma Technology, Faculty of Electrical Engineering and Information Technology, Ruhr-University Bochum, Germany
    • Ruhr University Bochum

  • Efe Kemaneci

    • Institute of Theoretical Electrical Engineering, Faculty of Electrical Engineering and Information Technology, Ruhr-University Bochum, Germany
    • Ruhr Univ Bochum