Abstract
Thermodynamic and transport properties are computed for a 17 species model of nitrogen-oxygen plasma under different degrees of thermal non-equilibrium, pressures and volume ratios of component gases. In the computation electron temperatures range from 300 to 45,000 K, mole fractions range from 0.8 to 0.2, pressures range from 0.1 atmosphere to 5 atmospheres, and thermal nonequilibrium parameters (Te/Th) range from 1 to 20. It is assumed that all the electrons follow a temperature Te and the rest of the species in the plasma follow a temperature Th. Compositions are calculated using the two temperature Saha equation derived by van de Sanden et al. Updated energy level data from National Institute of Standards and Technology (NIST) and recently compiled collision integrals by Capitelli et al., have been used to obtain thermodynamic and transport properties. In the local thermodynamic equilibrium (LTE) regime, the results are compared with published data and an overall good agreement is observed.
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Acknowledgements
We gratefully acknowledge the support for this study from Hypertherm, Inc. Discussions with Dr. Jon Lindsay, Hypertherm, contributed to this project and are acknowledged. A grant from the Minnesota Supercomputing Institute is gratefully acknowledged as well. One of the authors (S. Ghorui) is thankful to Department of Atomic Energy, India, for grant of leave for post-doctoral study.
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Ghorui, S., Heberlein, J.V.R. & Pfender, E. Thermodynamic and Transport Properties of Two-Temperature Nitrogen-Oxygen Plasma. Plasma Chem Plasma Process 28, 553–582 (2008). https://doi.org/10.1007/s11090-008-9141-3
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DOI: https://doi.org/10.1007/s11090-008-9141-3