High-Reynolds number effects in shock-wave/turbulent boundary-layer interactions
L. Laguarda (TU Delft - Aerospace Engineering)
S. Hickel (TU Delft - Aerospace Engineering)
F. F.J. Schrijer (TU Delft - Aerospace Engineering)
B. W. van Oudheusden (TU Delft - Aerospace Engineering)
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Abstract
We investigate Reynolds number effects in shockwave/turbulent boundary-layer interactions (STBLI) with strong mean flow separation. Three wall-resolved large-eddy simulations (LES) are performed for this purpose, with different Reynolds number but otherwise equal flow parameters and simulation setup. The resulting LES data covers more than a decade of friction Reynolds number. The high-Reynolds case, with friction Reynolds number Reτ = 5118 and momentum Reynolds number Reθ = 26438 at the virtual impingement point without the shock, features a turbulent boundary layer with clear inner and outer scale separation. All STBLI simulations exhibit substantial flow reversal and have been integrated for a very long time (90 flow-through times of the full domain length) to properly resolve low-frequency dynamics. Instantaneous and mean flow as well as spectral features are described in detail, together with a modal analysis of the three-dimensional streamwise velocity, streamwise vorticity and pressure fields.