A high-order spectral difference flow solver is used to perform direct numerical simulations (DNS) of a hypersonic laminar boundary layer on an ultrasonically absorptive coating (UAC), in order to analyze the stabilizing effects of such a material on the laminar–turbulent transition. The UAC is modeled in the simulations by a time-domain impedance boundary condition, which is calibrated to replicate the acoustic response of the UAC over a broad spectral range. The frequency-dependence damping effectiveness is investigated, as are any other side effects the porous coating might have on the mean flow. It is found that the second-mode instability, which dominates the high-Mach number flow regime, is strongly suppressed for all excitation frequencies considered. The DNS solutions are also found to compare favorably with linearized stability theory. Finally, a side effect of the UAC is the modification of the medium dispersive properties and the change of the perturbation group velocity.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Numerical Analysis of Porous Coatings Stabilizing Capabilities on Hypersonic Boundary-Layer Transition


    Contributors:

    Published in:

    AIAA Journal ; 59 , 10 ; 3845-3858


    Publication date :

    2021-07-02


    Size :

    14 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Acoustic Properties of Porous Coatings for Hypersonic Boundary-Layer Control

    Brès, Guillaume A. / Colonius, Tim / Fedorov, Alexander V. | AIAA | 2010



    Acoustic Properties of Porous Coatings for Hypersonic Boundary-Layer Control

    Bres, G.A. / Colonius, T. / Fedorov, A.V. | British Library Conference Proceedings | 2010


    Numerical Investigation of Hypersonic Boundary-Layer Stabilization by Porous Surfaces

    Wartemann, Viola / Lüdeke, Heinrich / Sandham, Neil D. | AIAA | 2012