The present paper presents the application of a technique to estimate velocity spectra on the complex supersonic flowfield of a shock-wave/turbulent boundary-layer interaction. A combined numerical–experimental approach relying on dual particle image velocimetry measurements and large-eddy simulations is used to optimize and validate a method allowing the reconstruction of spectral quantities from cross-correlations sampled at an arbitrary low sampling frequency from a Taylor-like hypothesis. The method, previously applied to a slowly streamwise developing boundary-layer flow, is refined so as to be able to better cope with flows having a higher degree of inhomogeneity. The accuracy and robustness of the resulting spectral estimates are evaluated in various characteristic regions distributed over the whole shock-wave/turbulent boundary-layer interaction flowfield thanks to the long-time large-eddy simulation database. Metrics allowing an a priori evaluation of the accuracy are also derived. Velocity spectra are then obtained from the experiments for the same locations. Comparisons with their large-eddy simulation counterparts make it possible to gain some insights into the origin of differences found between the experiments and the numerical simulation.
Velocity Spectrum Estimation in Shock-Wave/Turbulent Boundary-Layer Interaction
2017
Article (Journal)
English
Velocity Spectrum Estimation in Shock-Boundary Layer Interaction (AIAA 2016-0030)
British Library Conference Proceedings | 2016
|Asymmetric Crossing-Shock-Wave-Turbulent-Boundary-Layer Interaction
Online Contents | 1995
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