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Aerodynamic and thermal modelling of effusion cooling in LES

Abstract : 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.
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https://tel.archives-ouvertes.fr/tel-01953542
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Submitted on : Thursday, December 13, 2018 - 9:52:37 AM
Last modification on : Thursday, January 3, 2019 - 1:08:01 AM
Long-term archiving on: : Thursday, March 14, 2019 - 12:59:49 PM

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Romain Bizzari. Aerodynamic and thermal modelling of effusion cooling in LES. Fluids mechanics [physics.class-ph]. INP DE TOULOUSE, 2018. English. ⟨tel-01953542⟩

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