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Computational Campaign on the MTU T161 Cascade

Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM,volume 148)


Preliminary high-fidelity simulations of the MTU T161 low pressure turbine cascade with diverging end walls have been performed on massively parallel computational resources with four different high-order methods at outlet isentropic Mach number \(M_{2s}=0.601\) and two outlet isentropic Reynolds numbers, namely \(Re_{2s}=90\,\text {K}\) and \(Re_{2s}=200\,\text {K}\). First the flow regime and the boundary conditions are thoroughly described. The implementation of each method is then briefly introduced before the main results are presented. The main flow features of this test case have been qualitatively highlighted by these simulations. However, discrepancies have been observed quantitatively in terms of separation point on the suction side of the blade, especially at the lowest Reynolds. These simulations relied mainly on a laminar boundary layer at the inlet of the domain, which is likely the root cause of the observed discrepancies. Additional simulations with turbulent boundary layer imposed at the inlet are required to characterize the flow separation based on the turbulence intensity at the inlet.

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We first of all acknowledge Dr. Rolf-Dietmar Baier and Dr. Patrick Bechlars for making the geometry and measurements available. The teams at Cenaero, the university of Bergamo and Numeca furthermore acknowledge PRACE for awarding us access to MareNostrum at Barcelona Supercomputing Center (BSC), Spain, under the FullStuP (high-fidelity LES/DNS simulation of Full-Span Turbine Passage) project. Compute resources on Titan at Oak Ridge National Laboratory were provided to Imperial College under award ARD121 via the Innovative and Novel Computational Impact on Theory and Experiment (INCITE) program. This research used resources of the Argonne Leadership Computing Facility, which is a DOE Office of Science User Facility supported under contract DE-AC02-06CH11357. This research also used resources of the Oak Ridge Leadership Computing Facility, which is a DOE Office of Science User Facility supported under Contract DE-AC05-00OR22725. Cenaero furthermore benefited from computational resources made available on the Tier-1 supercomputer of the Fédération Wallonie-Bruxelles, infrastructure funded by the Walloon Region under the grant agreement n\(^\circ \) 1117545.

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Rasquin, M. et al. (2021). Computational Campaign on the MTU T161 Cascade. In: , et al. TILDA: Towards Industrial LES/DNS in Aeronautics. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 148. Springer, Cham.

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