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

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.
Document type :
Journal articles
Complete list of metadatas

Cited literature [30 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-02049186
Contributor : Franck Nicoud <>
Submitted on : Wednesday, February 27, 2019 - 8:56:34 PM
Last modification on : Tuesday, May 28, 2019 - 1:54:04 PM

File

Bizzari_et_al_FTAC_OK.pdf
Files produced by the author(s)

Identifiers

Citation

R. Bizzari, D. Lahbib, A. Dauptain, F. Duchaine, L. Gicquel, et al.. A Thickened-Hole Model for Large Eddy Simulations over Multiperforated Liners. Flow, Turbulence and Combustion, Springer Verlag (Germany), 2018, 101 (3), pp.705-717. ⟨10.1007/s10494-018-9909-3⟩. ⟨hal-02049186⟩

Share

Metrics

Record views

18

Files downloads

40