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Modélisation et contrôle des instabilités de combustion : Application à l'identification et la modélisation des systèmes non-linéaires continus en boucle fermée

Abstract : This thesis deals with modelling and active control of combustion instabilities. The grey-box approach
is considered for identifying combustion instabilities models. The Krylov-Bogoliubov (K-B) method is chosen as the main tool for model analysis. Two tractable analytical models with closed-loop structure
are proposed. The first model is based on two coupled generalized Van der Pol equations. The analysis shows that this model can not describe the coexistence of two oscillating non-harmonic modes phenomenon observed in practice. The second model is established by adding a time delay and low pass filter in the first model. The analysis shows that completed model has the ability to describe the coexistence of two oscillating non-harmonic modes phenomenon. The performances of K-B approximation are widely illustrated using simulations tests. To establish the conditions for quenching oscillations in combustion instabilities, the active control by high frequencies excitation and by feedback is considered. Both give successful results verified by the simulation tests.
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https://tel.archives-ouvertes.fr/tel-00126811
Contributor : Fethi Bouziani <>
Submitted on : Friday, January 26, 2007 - 11:17:29 AM
Last modification on : Friday, November 6, 2020 - 4:13:22 AM
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Fethi Bouziani. Modélisation et contrôle des instabilités de combustion : Application à l'identification et la modélisation des systèmes non-linéaires continus en boucle fermée. Automatique / Robotique. Institut National Polytechnique de Grenoble - INPG, 2006. Français. ⟨tel-00126811⟩

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