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Modélisation d'une décharge électrique de type streamer dans l'air à haute-pression sous géométrie non uniforme

Abstract : Streamer induced filamentary discharges have numerous industrial applications. They also appear in natural phenomena. Recently there has been a realisation that a better understanding is required of the intrinsic phenomena associated with this type of discharge. The object of this work has been to model (using fluid equations) and to simulate the spatio-temporal evolution of the primary charged species and of the electrical field in the gas. This simulation has been realised in a two-dimensional geometry for a positive-point to plane gap, where the electrical field is strongly heterogeneous. It is based on the resolution of hydrodynamic equations by a specially modified characteristic method. The results, for a primary simulation, have been compared to various significant values. Then, the ionising wave formation and the trigger have been studied in more detail, by the introduction of the photo-triggered streamer process. Next, a photoionisation analysis has been performed, where the induced emission has been taken into account in photon treatment. A more industrial point of vue is presented in which the trigger and the propagation of the streamer discharge were studied as a function of the applied voltage, the point of curvature, the pressure and the point shape. Finally a return to the model has been made, with presentation of phenomena which tend to invalidate the local electric equilibrium, notably by taking into account the streamer head advance.
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Contributor : Philippe Dessante <>
Submitted on : Tuesday, June 21, 2016 - 10:50:50 AM
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  • HAL Id : tel-01334291, version 1


Philippe Dessante. Modélisation d'une décharge électrique de type streamer dans l'air à haute-pression sous géométrie non uniforme. Physique [physics]. Univ. Versailles-Saint-Quentin-en-Yvelines, 2000. Français. ⟨tel-01334291⟩



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