Abstract
An integrated modelling approach of Chemical Vapour Infiltration of a fibrous preform by methyltrichlorosilane, featuring coupled reactor fluid mechanics and porous medium gas transport has been developed. The coupling between transport/reaction phenomena inside and outside the preform is rather strong, both physically and numerically. An important counter-effect of the reactive preform on the surrounding gas-phase composition is evidenced; also, an appreciable dissymmetry of the densification rate inside the preform, even with negligible convective transport inside it . Such an approach brings new informations for understanding the physico-chemical phenomena of CVI and new guidelines for preform densification optimisation.
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