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Contribution à l'étude des propriétés des plasmas à deux températures - application à l'argon et à l'air

Abstract : In the field of thermal plasmas, numerous industrial processes are characterized by assuming thermal equilibrium. However, these equilibrium conditions are not fulfilled near the boundary of plasmas created by electric arcs or plasma jets. The deviations from the equilibrium change then considerably the kinetics of the chemical environment and can affect the process being studied. Understanding, analysis and prediction of these processes require a modeling of two temperature plasma physics (2T). This model is based on the prior calculation of 2T plasma properties calculation which is the subject of this thesis. The first part of this work is devoted to calculate the two temperatures plasma composition. There are several theories in the literature to calculate the densities of species for non-equilibrium plasma but the originality of this work is in the establishment of a "pseudo-kinetic" law governing the settlement of species for the intermediate temperatures. The second part concerns the calculation of thermodynamic properties. It is based on a literature review of existing methodologies and data necessary to obtain such properties. A special effort is made to separate the contributions of those electrons and heavy particles in exchanges of energy. The last part of this thesis is dedicated to the calculation of transport coefficients. We discuss the outline of calculations intermediate properties before introducing the different theories available in literature. All results were validated by comparing the calculation to LTE with the literature.
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Submitted on : Monday, February 21, 2011 - 10:44:57 AM
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  • HAL Id : tel-00567193, version 2

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Hugues Hingana. Contribution à l'étude des propriétés des plasmas à deux températures - application à l'argon et à l'air. Autre. Université Paul Sabatier - Toulouse III, 2010. Français. ⟨tel-00567193v2⟩

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