Analysis of unsteady behaviour in shockwave turbulent boundary layer interaction - École polytechnique Access content directly
Journal Articles Journal of Fluid Mechanics Year : 2012

Analysis of unsteady behaviour in shockwave turbulent boundary layer interaction

Abstract

The unsteady behaviour in shockwave turbulent boundary layer interaction is investigated by analysing results from a large eddy simulation of a supersonic turbulent boundary layer over a compression-expansion ramp. The interaction leads to a very-low-frequency motion near the foot of the shock, with a characteristic frequency that is three orders of magnitude lower than the typical frequency of the incoming boundary layer. Wall pressure data are first analysed by means of Fourier analysis, highlighting the low-frequency phenomenon in the interaction region. Furthermore, the flow dynamics are analysed by a dynamic mode decomposition which shows the presence of a low-frequency mode associated with the pulsation of the separation bubble and accompanied by a forward-backward motion of the shock.
Fichier principal
Vignette du fichier
S0022112012000377a.pdf (835.39 Ko) Télécharger le fichier
Origin : Publisher files allowed on an open archive
Loading...

Dates and versions

hal-00994470 , version 1 (03-06-2014)

Identifiers

Cite

Muzio Grilli, Peter J. Schmid, Stefan Hickel, Nikolaus A. Adams. Analysis of unsteady behaviour in shockwave turbulent boundary layer interaction. Journal of Fluid Mechanics, 2012, 700, pp.16-28. ⟨10.1017/jfm.2012.37⟩. ⟨hal-00994470⟩
519 View
926 Download

Altmetric

Share

Gmail Facebook X LinkedIn More