Abstract
The effects of crossflow on the interaction between an impinging shock wave and a high-speed turbulent boundary layer are investigated using direct numerical simulations of statistically two-dimensional, three-component flow. The leading-order effect of crossflow is increased size and strength of the separation bubble, with upstream and downstream displacement of the separation and reattachment points, respectively. This effect is traced to retarded growth of the shear layer surrounding the separation bubble, with associated reduction of the turbulent shear stress. Genuinely, three-dimensional effects are observed in the interaction and in the downstream recovery zone, with mean flow direction changing both in the longitudinal and wall-normal directions. Three-dimensional, non-equilibrium effects yield substantial misalignment between turbulent stresses and mean strain rate, thus providing a challenging benchmark for the development and validation of turbulence models for compressible flows.
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Acknowledgements
The results reported in this paper have been produced using the PRACE Research Infrastructure resource MARCONI and the ISCRA resource Marconi100 based at CINECA, Casalecchio di Reno, Italy, as well as the resources of the Argonne Leadership Computing Facility (a DOE Office of Science User Facility supported under Contract DE-AC02-06CH11357) as part of support from the Innovative and Novel Computational Impact on Theory and Experiment (INCITE) program.
Funding
This study has been funded by the US Air Force Office of Scientific Research under Grants FA9550-19-1-7029 and FA9550-19-1-0210, with additional support from the AFOSR International Student Exchange Program.
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Communicated by Vassilios Theofilis.
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Di Renzo, M., Oberoi, N., Larsson, J. et al. Crossflow effects on shock wave/turbulent boundary layer interactions. Theor. Comput. Fluid Dyn. 36, 327–344 (2022). https://doi.org/10.1007/s00162-021-00574-y
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DOI: https://doi.org/10.1007/s00162-021-00574-y