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- W1906510919 abstract "The search for a more efficient method to destroy aircraft trailing vortices requiresa good understanding of the early development of the vortices. For that purpose, anexperimental investigation has been conducted to study the formation and near-fielddynamics of a wing tip vortex. Two versions of the Digital Particle Image Velocimetry (DPIV) technique wereused in the studies. Planar DPIV was used to obtain velocity fields adjacent to the wingsurface. Stereoscopic DPIV, which allows instantaneous measurements of all threecomponents of velocity within a planar slice, was used to measure velocity fields behindthe wing. The trailing vortex was produced by a rectangular half-wing model with anNACA 0012 profile. All measurements were made at Reynolds number, based on chordlength, of 9040. The present study has found that the wing sheds multiple vortices. A structurethat closely resembles a wing tip vortex is first observed on the suction side of the wingnear the tip at the mid-chord section of the wing. At the trailing edge of the wing, asmaller vortex with an opposite sense of rotation is observed next to the tip vortex. Inaddition to the two vortices, two vortex layers with opposite sense of rotation, one on thepressure side and one on the suction side, are apparent at the trailing edge. Fartherdownstream, most of the vorticity in the vortex layer, with the same sense of rotation asthe tip vortex, rolls up into the wing tip vortex. The vortices, with opposite sense ofrotation, break up into smaller vortices which orbit around the tip vortex. At least onerelatively strong satellite vortex appears in some of the instantaneous fields. The studiesfound that the interaction of the tip vortex and satellite vortices give rise to the unsteadymotion of the wing tip vortex. In addition, the studies also examined the effects of theboundary layer and the tip geometry to the strength and motion of the trailing vortex." @default.
- W1906510919 created "2016-06-24" @default.
- W1906510919 creator A5055796293 @default.
- W1906510919 date "2001-12-01" @default.
- W1906510919 modified "2023-09-26" @default.
- W1906510919 title "Formation and near-field dynamics of a wing tip vortex" @default.
- W1906510919 doi "https://doi.org/10.7907/vnjw-6592." @default.
- W1906510919 hasPublicationYear "2001" @default.
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