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.


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    Title :

    Velocity Spectrum Estimation in Shock-Wave/Turbulent Boundary-Layer Interaction



    Published in:

    Publication date :

    2017




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    55.50 Luftfahrzeugtechnik / 55.60 Raumfahrttechnik / 55.60 / 50.93 / 55.50 / 50.93 Weltraumforschung
    Local classification TIB:    770/7040



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