Modélisation de lampes IR avec réflecteur intégré utilisées dans le procédé de fabrication de pré-imprégné thermoplastique

Abstract : This study proposes a modelling strategy to simulate the heating stage during the production of thermoplastic composite tapes. Impregnation using a slurry powder technique with carbon fibresand PEKK (PolyEther-Ketone-Ketone) requires a heating step, to evaporate the aqueous phase and melt the polymer powder. These phenomenon are highly temperature dependant justifying the need to characterise heat transfer within the IR oven. In the literature, most models refer to clear lamps with Lambertian emission. In this study, tubular lamps with a coating on the back side (i.e. integrated reflector) are used. This integrated reflector greatly modifies the lamps spatial emission, therefor the lamp can no longer be modelled using a cylinder with Lambertian emission. This study proposes an adaptation of the radiosity method to predict spatial emission of the lamp without explicitly accounting for the reflector in terms of radiative exchange. The emission of the lamp was characterised by inverse analysis combining experimental results with numerical simulation using the commercial software –COMSOL Multiphysics®.
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Jennifer Mackie, Olivier de Almeida, Fabrice Schmidt, Karine Labastie. Modélisation de lampes IR avec réflecteur intégré utilisées dans le procédé de fabrication de pré-imprégné thermoplastique. JNC 21 : Journées Nationales sur les Composites 2019, École Nationale Supérieure d'Arts et Métiers (ENSAM) - Bordeaux, Jul 2019, Bordeaux, Talence, France. 7 p. ⟨hal-02421155⟩

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