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Abstract
Aircraft wakes have been a subject of continuously renewed interest over the last thirty years, in part due to the fundamental aspects inherent to the dynamics of vortex pairs. Often reported in experimental studies, vortex wandering is an apparently erratic motion of the vortex cores which is observed early on in the forming vortices. The origin of this phenomenon is still uncertain. Some have attributed it to the ambient turbulence of wind tunnels. More recent studies have postulated that wandering was the result of a transient growth of optimal perturbations, possibly related to a fundamental instability of the vortex. However, the cause of the excitation is not clearly established. In this work, we further investigate vortex wandering using numerical simulation. The results are compared with experimental data on vortex pairs with axial flow. The investigation aims to explore the role of the drag-induced transverse wake structures in the perturbation of the trailing vortices during wake roll-up.
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Caprace, D.-G., Winckelmans, G., & Chatelain, P. (2026, June 11). Is trailing vortex wandering connected to wing parasitic drag? DisCoVor 2026, Edinburgh. https://hdl.handle.net/2078.5/277119