PhD defense : Romain BIZZARI – “Aerodynamic and thermal modelling of effusion cooling in LES”
Numerical simulation is progressively taking importance in the design of an aeronautical engine. However, concerning the particular case of cooling devices, the high number of sub-millimetric cooling holes is an obstacle for computational simulations. A classical approach goes through the modelling of the effusion cooling by homogenisation. It allows to simulate a full combustor but fails in representing the jet penetration and mixing. A new approach named thickened-hole model was developed during this thesis to overcome this issue. A work on improving the mesh resolution on key areas thanks to an automatic adaptive method is also presented, leading to a clear breakthrough. In parallel, as the flame tube temperature is a cornerstone for the combustor durability, a low-cost approach is proposed to predict it. To meet the time-constraints of design, it is based on thermal modelling instead of a direct thermal resolution.
|PROMES CNRS Perpignan
|VKI Bruxelles (Belgique)
|Pprime Université de Poitiers
|Univ. de Pau & des Pays de l’Adour
|SAFRAN HE Bordes