Title: The structure of turbulence in transonic shock wave/boundary layer interaction

Authors: Matteo Bernardini, Sergio Pirozzoli

Addresses: Universita di Roma 'La Sapienza', Dipartimento di Ingegneria Meccanica e Aerospaziale, Via Eudossiana 18, 00184 Rome, Italy. ' Universita di Roma 'La Sapienza', Dipartimento di Ingegneria Meccanica e Aerospaziale, Via Eudossiana 18, 00184 Rome, Italy

Abstract: A direct numerical simulation database is exploited to investigate the interaction of a normal shock wave with a turbulent boundary layer developing over a flat plate at free-stream Mach number M_∞ = 1.3 and moderate Reynolds number Re_θ ≈ 1,200 (based on the momentum thickness of the incoming boundary layer). At the selected conditions, the boundary layer does not exhibit separation in the mean flow, and the interaction region is characterised by the unsteady release of large vortical structures. The shock system is sufficiently strong to alter the near-wall streaky structures of the incoming boundary layer, which disappear past the interaction. This effect is quantitatively analysed, and found to be similar to that observed in turbulent channels with a moving wall.

Keywords: transonic flows; direct numerical simulation; DNS; boundary layers; turbulence structures; coherent structures; transonic shock waves; shock wave-boundary layer interaction.

DOI: 10.1504/IJESMS.2011.038750

International Journal of Engineering Systems Modelling and Simulation, 2011 Vol.3 No.1/2, pp.53 - 63

Published online: 21 Mar 2015 *

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