Numerical results are presented for the stability analysis of the wake induced by a cuboidal roughness element mounted on a flat plate inside a Mach 6 freestream. Linear BiGlobal stability calculations are carried out for a single frequency on a spanwise plane located behind the roughness, using base flows obtained from laminar Navier–Stokes simulations. The results show that the Mack mode is the most unstable perturbation growing in the boundary layer, followed by varicose and sinuous deformations of the low-velocity streak that characterizes the wake flow structure. The shock wave induced at the leading edge of the flat plate is found to have a significant stabilizing effect on the flow field. The use of a higher wall temperature stabilizes the Mack mode but increases the growth rate of the varicose perturbation.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    BiGlobal stability analysis of the wake behind an isolated roughness element in hypersonic flow


    Beteiligte:


    Erscheinungsdatum :

    2020-01-01


    Format / Umfang :

    15 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Analysis of Hypersonic Flow Behind an Isolated Roughness Element Using Kinetic Methods

    Klothakis, Angelos / Dylewicz, Kamil / Theofilis, Vassilios et al. | TIBKAT | 2023


    Analysis of Hypersonic Flow Behind an Isolated Roughness Element Using Kinetic Methods

    Klothakis, Angelos / Dylewicz, Kamil / Theofilis, Vassilios et al. | AIAA | 2023


    BiGlobal Stability Analysis of a Micro-Ramp Wake using PIV Base Flows

    Groot, Koen J. / Ye, Qingqing / Zhang, Yue et al. | AIAA | 2016


    Spatial BiGlobal Stability Analysis of Spanwise Vortex Rollup on a Hypersonic Finned Cone

    McMillan, Madeline / Mullen, Charles D. / Reed, Helen L. | AIAA | 2021


    BiGlobal Stability Analysis of Unsteady Flow in Vaneless Diffuser of Centrifugal Compressor

    Hu, Chenxing / Liu, Pengyin / Zhu, Xiaocheng et al. | AIAA | 2017