Decay or collapse: Aircraft wake vortices in grid turbulence


Ren, M. and Elsenaar, A. and Heijst, G.J.F. van and Kuczaj, A.K. and Geurts, B.J. (2006) Decay or collapse: Aircraft wake vortices in grid turbulence. In: Euromech Fluid Mechanics Conference - 6 (EFMC6), 26-30 June 2006, KTH Mechanics, Stockholm, Sweden (pp. p. 167).

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Abstract:Trailing vortices are naturally shed by airplanes and they typically evolve into a counter-rotating vortex pair. Downstream of the aircraft, these vortices can persist for a very long time and extend for several kilometers. This poses a potential hazard to following aircraft, particularly during take-off and landing. Therefore, it is of interest to understand what effects control the decay rate in strength of the trailing vortices. The decay of the aircraft wake vortices is strongly dependent on weather conditions.
To simulate an environment of atmospheric turbulence, homogeneous isotropic turbulence is introduced next to localized vortical structure. In this contribution, the effect of external turbulence on the vortex decay will be investigated numerically, using a DNS method, and experimentally. Wind tunnel experiments are carried out using a smoke visualization technique.
Item Type:Conference or Workshop Item
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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