Hybrid simulation of wake vortices of landing aircraft in a turbulent environment etc15 Tracking Number 297Presentation: Session: Jets and Wakes 2 Room: Room E Session start: 15:00 Tue 25 Aug 2015 Anton Stephan anton.stephan@dlr.de Affifliation: Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre Frank Holzäpfel Frank.Holzaepfel@dlr.de Affifliation: Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre Takashi Misaka misaka@edge.ifs.tohoku.ac.jp Affifliation: Tohoku University, Institute of fluid science Topics: - Vortex dynamics and structure formation, - Large eddy simulation and related techniques, - Jets and wakes Abstract: Wake-vortex evolution during landing of a long range aircraft is investigated in a turbulent environment. The simulations cover final approach, touchdown on the tarmac, and the evolution of the wake after touchdown. An ambient turbulent crosswind and headwind field is generated in a pre-simulation. The wake is initialized using a RANS-LES coupling approach. The further development of the vortical wake is investigated by large-eddy simulation until final decay. Strong three-dimensional deformations appearing after touchdown and linkings with the ground are studied. The downwind vortex is strongly advected with crosswind and decays quickly. The interaction of plate line disturbances and end effects in a turbulent environment leads to irregular decay pattern. |