Contribution à la compréhension de l'évaporation de gouttes de combustible bi-composant à l'aide de méthodes optiques

Abstract : Non intrusive optical diagnostics are developed to investigate the mechanisms governing multicomponent droplets evaporation. The case of periodically and linearly arranged monodisperse droplets is considered in these experiments. Droplets are injected either at ambient temperature or into a hot air plume at about 500°C. The fuel mixture is made of ethanol and acetone, which exhibit very different volatilities. Two techniques based on Laser Induced Fluorescence (LIF) have been developed to investigate heat and mass transfers. The first one, the three colours LIF allows obtaining the average temperature of binary droplets. The second one used the fluorescence of acetone excited by an UV laser (266 nm) in order to quantify the acetone molar fraction. Finally, measurements are compared with a numerical model that is derived from a discreet component approach and the assumption of 1D quasi-steady evolution of the gas phase
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Christophe Maqua. Contribution à la compréhension de l'évaporation de gouttes de combustible bi-composant à l'aide de méthodes optiques. Autre [cond-mat.other]. Institut National Polytechnique de Lorraine, 2007. Français. ⟨NNT : 2007INPL071N⟩. ⟨tel-01752901⟩

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