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AIRCRAFT WAKE VORTEX DEFORMATION IN TURBULENT ATMOSPHERE

Ingo Hennemann
Institute of Atmospheric Physics Deutsches Zentrum für Luft- und Raumfahrt Mθnchner Str. 20, D-82234 Wessling, Germany

Frank Holzapfel
Institut fur Physik der Atmosphere Deutsches Zentrum fur Luft- und Raumfahrt (DLR) Oberpfaffenhofen D-82234 Wessling

Abstract

Large-scale distortion of aircraft wake vortices appears to play a crucial role for aircraft safety during approach and landing. Vortex distortion is investigated based on large eddy simulations of wake vortex evolution in a turbulent atmosphere. A vortex identification method is developed that can be adapted to the vortex scales of interest. Based on the identified vortex center tracks, a statistics of vortex curvature radii is established. This statistics constitutes the basis for understanding, modeling, and exploiting mitigation effects of vortex distortion on wake vortex encounters.