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http://dx.doi.org/10.5139/JKSAS.2020.48.1.1

Computation of Wake Vortex Behavior Behind Airplanes in Close Formation Flight Using a Fourier-Spectral Method  

Ji, Seunghwan (Department of Aeronautical and Mechanical Design Engineering, Korea National University of Transportation)
Han, Cheolheui (Department of Aeronautical and Mechanical Design Engineering, Korea National University of Transportation)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.48, no.1, 2020 , pp. 1-11 More about this Journal
Abstract
Behaviors of wake vortices generated by an aircraft affect the performance and flight stability of flying aircraft in formation flight. In the present study, the trajectories of the wake vortices behind airplanes in close formation flight were computed using a Fourier spectral method. The behavior of wake vortices showed complex patterns depending on the initial circulation and the relative positions between the vortices. In the initial stage, the wake vortex movement was affected by the nascent vortex. When the vortex becomes closer to the other vortex, then a new trajectory is formed. When the viscous effect becomes dominant, the core radius increases. Thus, a new vortex moving near the existing vortex can have strong interaction with each other, resulting in the complicated behavior of wake vortices. In the future, the ground effect on the behavior of the wake vortices during take-off and landing will be studied.
Keywords
Aircraft Wake Vortices; Formation Flight; Fourier Spectral Method;
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Times Cited By KSCI : 2  (Citation Analysis)
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