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A mesh adaptation strategy for complex wall-modeled turbomachinery LES

Odier, Nicolas and Thacker, Adrien and Harnieh, Maël and Staffelbach, Gabriel and Gicquel, Laurent Y.M. and Duchaine, Florent and Garcia Rosa, Nicolas and Müller, Jens-Dominik A mesh adaptation strategy for complex wall-modeled turbomachinery LES. (2021) Computers and Fluids, 214. 104766. ISSN 0045-7930

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Official URL: https://doi.org/10.1016/j.compfluid.2020.104766

Abstract

A mesh adaptation methodology for wall-modeled turbomachinery Large Eddy Simulation (LES) is proposed, simultaneously taking into account two quantities of interest: the average kinetic energy dissipation rate and the normalized wall distance y+. This strategy is first tested on a highly loaded transonic blade with separated flow, and is compared to wall-resolved LES results, as well as experimental data. The adaptation methodology allows to predict fairly well the boundary layer transition on the suction side and the recirculation bubble of the pressure side. The method is then tested on a real turbofan stage for which it is shown that the general operating point of the computation converges toward the experimental one. Furthermore, comparison of turbulence predictions with hot-wire anemometry show good agreement as soon as a first adaptation is performed, which confirms the efficiency of the proposed adaptation method.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Other partners > Centre Européen de Recherche et Formation Avancées en Calcul Scientifique - CERFACS (FRANCE)
Other partners > Queen Mary University of London - QMUL (UNITED KINGDOM)
Laboratory name:
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Deposited On:22 Feb 2021 17:11

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