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Erschienen in:
2011 | OriginalPaper | Buchkapitel
Numerical simulations of shock-wave/boundary-layer interaction phenomena
verfasst von : Neil D. Sandham, Emile Touber
Erschienen in: Direct and Large-Eddy Simulation VIII
Verlag: Springer Netherlands
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We review recent simulations of shock-induced separation of boundary layers and then consider in detail some properties of the detached shear layer that forms after separation of a turbulent boundary layer at Mach 2.3. Whilst still challenging in terms of numerical methods, due to the simultaneous presence of shock waves and turbulence, both direct numerical simulation and large eddy simulations (LES) are useful tools to investigate fundamental issues of shock-wave/boundary-layer interaction. In particular with LES it is feasible to calculate the long run times and wide domains necessary to study low frequency motions that occur under the reflected shock foot. We show here that a simplified model based on growth rate of the separated shear layer leads to predictions of frequency that are significantly higher than the low-frequency peak seen in LES and experiment.