Journal
SHOCK WAVES
Volume 19, Issue 6, Pages 469-478Publisher
SPRINGER
DOI: 10.1007/s00193-009-0222-x
Keywords
Shock boundary layer interaction; LES; Low-frequency unsteadiness; Separation bubble
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Funding
- EPSRC
- European Union
- EPSRC [EP/F011016/1, EP/D044073/1, EP/G069581/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/G069581/1, EP/D044073/1, EP/F011016/1] Funding Source: researchfish
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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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