Dynamic interaction between shock wave turbulent boundary layer and flexible panel

The high-speed fluid–structure interaction (FSI) occurring between a skin panel and turbulent shock-boundary layer (SBLI) are investigated with large eddy simulations (LES). SBLI is comprised of Mach 4 unit Reynolds number 2.375×107 (/m) flow interacting an oblique shock strength p3/p1≈8.5 angle σ≈30deg. inviscid point impingement on the flexible occurs near mid-chord length. fully clamped rectangular has aspect ratio non-dimensional thickness b/a=1.377 h/a=0.003, respectively. strong induces separation length Lsep≈0.7a (or equivalently ≈23δin) wide range scales, including characteristic low-frequency unsteadiness. Fluid structural responses compared across different classes interaction, namely: rigid surface; one-way application loads to structure; two-way structure. interplay elucidated using detailed analysis that includes proper orthogonal decomposition (POD), dynamic mode (DMD), recently developed Lagrangian modal (LMA) for deforming meshes. deflections (∼1h) result in non-linearity associated coupling bending stretching panel, manifested terms increased frequencies deflection.