No abstract

This article proposes the use of the Box-Behnken design of experiment (DoE) methodology to study an aircraft anti-icing system. The anti-icing system consisted of a piccolo tube with round apertures for producing air jets inside a wing. Mass flow, jet to wall distance, and jet impact angle were varied, starting from an initial design, in order to maximize heat transfer effectiveness. A conjugate heat transfer procedure from commercial CFD software was used to solve for cold air external flow, compressible internal flow, and thermal conduction in the airfoil skin. The DoE methodology was validated using a single impinging jet. A quadratic model of the heat transfer effectiveness of the anti-icing system was then built using the methodology and the maximal value was sought.

Le tunnel et le TGV n'auront pas d'effets automatiques. Les infrastructures sont nécessaires, mais non suffisantes. Elles vont concentrer les flux sur la région du Nord et donner des atouts pour localiser les activités. Mais il faut mettre en valeur les forces et résorber les handicaps, mettre en oeuvre une stratégie régionale et globale de développement et de communication, avec une démarche collective de tous les partenaires.