OATAO - Open Archive Toulouse Archive Ouverte Open Access Week

A characteristic inlet boundary condition for compressible, turbulent, multispecies turbomachinery flows

Odier, Nicolas and Sanjosé, Marlène and Gicquel, Laurent and Poinsot, Thierry and Moreau, Stéphane and Duchaine, Florent A characteristic inlet boundary condition for compressible, turbulent, multispecies turbomachinery flows. (2019) Computers and Fluids, 178. 41-55. ISSN 0045-7930

(Document in English)

PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader

Official URL: https://doi.org/10.1016/j.compfluid.2018.09.014


A methodology to implement non-reflecting boundary conditions for turbomachinery applications, based on characteristic analysis is described in this paper. For these simulations, inlet conditions usually corre- spond to imposed total pressure, total temperature, flow angles and species composition. While directly imposing these quantities on the inlet boundary condition works correctly for steady RANS simulations, this approach is not adapted for compressible unsteady Large Eddy Simulations because it is fully re- flecting in terms of acoustics. Deriving non-reflecting conditions in this situation requires to construct characteristic relations for the incoming wave amplitudes. These relations must impose total pressure, total temperature, flow angle and species composition, and simultaneously identify acoustic waves reach- ing the inlet to let them propagate without reflection. This treatment must also be compatible with the injection of turbulence at the inlet. The proposed approach shows how characteristic equations can be derived to satisfy all these criteria. It is tested on several cases, ranging from a simple inviscid 2D duct to a rotor/stator stage with turbulence injection.

Item Type:Article
Additional Information:This is an open access article under the CC BY-NC-ND license : https://creativecommons.org/licenses/by-nc-nd/4.0/. Thanks to Elsevier editor. The definitive version of this document is available at: https://www.sciencedirect.com/science/article/pii/S0045793018306534?via%3Dihub
HAL Id:hal-02094393
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Centre Européen de Recherche et Formation Avancées en Calcul Scientifique - CERFACS (FRANCE)
Other partners > Université de Sherbrooke (CANADA)
Laboratory name:
Deposited On:28 Feb 2019 09:43

Repository Staff Only: item control page