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Flow, Turbulence and Combustion
Erschienen in: Flow, Turbulence and Combustion 3/2018

14.04.2018

A Thickened-Hole Model for Large Eddy Simulations over Multiperforated Liners

verfasst von: R. Bizzari, D. Lahbib, A. Dauptain, F. Duchaine, L. Y. M. Gicquel, F. Nicoud

Erschienen in: Flow, Turbulence and Combustion | Ausgabe 3/2018

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Abstract

In aero-engines, mutiperforation cooling systems are often used to shield the combustor wall and ensure durability of the engine. Fresh air coming from the casing goes through thousands of angled perforations and forms a film which protects the liner. When performing Large Eddy Simulations (LES) of a real engine, the number of sub-millimetric holes is far too large to allow a complete and accurate description of each aperture. Homogeneous models allow to simulate multiperforated plates with a mesh size bigger than the hole but fail in representing the jet penetration and mixing. A heterogeneous approach is proposed in this study, where the apertures are thickened if necessary so that the jet-crossflow interaction is properly represented. Simulations using homogeneous and thickened-hole models are compared to a fully resolved computation for various grid resolutions in order to illustrate the potential of the method.
Vorheriger Artikel Assessment of a Two-Way Coupling Methodology Between a Flow and a High-Order Nonlinear Acoustic Unstructured Solvers
Nächster Artikel The Effect of a Low-Frequency Structure on Passive Scalar Transport in the Flow Over a Surface-Mounted Rib

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Metadaten
Titel
A Thickened-Hole Model for Large Eddy Simulations over Multiperforated Liners
verfasst von
R. Bizzari
D. Lahbib
A. Dauptain
F. Duchaine
L. Y. M. Gicquel
F. Nicoud
Publikationsdatum
14.04.2018
Verlag
Springer Netherlands
Erschienen in
Flow, Turbulence and Combustion / Ausgabe 3/2018
Print ISSN: 1386-6184
Elektronische ISSN: 1573-1987
DOI
https://doi.org/10.1007/s10494-018-9909-3

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