Experimental comparison of shock buffet on unswept and 10-deg swept wings

The flow over a wing model with aspect ratio 2 and based on the supercritical airfoil (OAT15A) was experimentally investigated for a fixed Reynolds number ($$Re_\textrm{c}$$ R e c ) of $$3\times 10^{6}$$ 3 × 10 6 and numerous aerodynamic conditions. The angle of attack (AOA) and the Mach number ($$M_\mathrm {\infty }$$ M ∞ ) were varied between 5$$^{\circ }$$ ∘ and 6.5$$^{\circ }$$ ∘ , and between 0.72 and 0.75, respectively. Here we focused on the dynamics of the shock front at incipient and developed buffet conditions, by employing background-oriented schlieren measurements on the wing’s upper surface. The spanwise variations of the shock front statistics and its frequency content were examined. The shock oscillations appeared to be the superposition of multiple fluid modes, of which the most dominant was the classic 2-D buffet, which induced uniform chordwise oscillations of the shock front. The hypothesis was formulated that the remaining modes are linked to physical phenomena reported in the literature, namely the side-wall boundary layer and the vortices detected in the mid-span separated flow.

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Characterization of transonic shock oscillations over the span of an OAT15A profile

Accorinti

Korthäuer

Scharnowski

et al. 2023

Exp Fluids

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Density field reconstruction from time-series schlieren images via extended phase-consistent dynamic mode decomposition

2023

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Transonic buffet simulation using a partially-averaged Navier-Stokes approach

Petrocchi,

Barakos

2024

Aerospace Science and Technology

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Experimental comparison of shock buffet on unswept and 10-deg swept wings

Cited by 9 publications

References 36 publications

Characterization of transonic shock oscillations over the span of an OAT15A profile

Characterization of transonic shock oscillations over the span of an OAT15A profile

Density field reconstruction from time-series schlieren images via extended phase-consistent dynamic mode decomposition

Transonic buffet simulation using a partially-averaged Navier-Stokes approach

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