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Comparison of three large-eddy simulations of shock-induced turbulent separation bubbles

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Abstract

Three different large-eddy simulation investigations of the interaction between an impinging oblique shock and a supersonic turbulent boundary layer are presented. All simulations made use of the same inflow technique, specifically aimed at avoiding possible low-frequency interferences with the shock/boundary-layer interaction system. All simulations were run on relatively wide computational domains and integrated over times greater than twenty five times the period of the most commonly reported low-frequency shock-oscillation, making comparisons at both time-averaged and low-frequency-dynamic levels possible. The results confirm previous experimental results which suggested a simple linear relation between the interaction length and the oblique-shock strength if scaled using the boundary-layer thickness and wall-shear stress. All the tested cases show evidences of significant low-frequency shock motions. At the wall, energetic low-frequency pressure fluctuations are observed, mainly in the initial part of interaction.

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  1. University of Southampton, Southampton, SO17 1BJ, UK

    Emile Touber & Neil D. Sandham

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  1. Emile Touber
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  2. Neil D. Sandham
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Correspondence to Emile Touber.

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Communicated by J.-P. Dussauge.

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Touber, E., Sandham, N.D. Comparison of three large-eddy simulations of shock-induced turbulent separation bubbles. Shock Waves 19, 469–478 (2009). https://doi.org/10.1007/s00193-009-0222-x

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  • DOI: https://doi.org/10.1007/s00193-009-0222-x

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