The evolution of aircraft wake vortices from the roll-up until vortex decay is studied by large-eddy simulation. An aircraft model and the surrounding flow field obtained from high-fidelity Reynolds-averaged Navier–Stokes simulation are swept through a ground-fixed computational domain to initialize the wake. After the wake initialization a large-eddy simulation of the vortical wake is performed until vortex decay. In this paper the methodology is tested with a NACA 0012 wing and applied to the DLR-F6 wing-body model in cruise condition and a long-range aircraft model in high-lift configuration which was used in the European Aircraft Wing with Advanced Technology Operation project. The correlation between the detailed roll-up process of the vorticity sheet shedding from the main wing and the characteristics of the rolled-up vortex pair such as vortex circulation, core radius, and separation is investigated with and without ambient turbulence. In both the DLR-F6 wing-body and the long-range aircraft models, the behavior of the formed vortex pair appears similar to that of a vortex pair defined by an analytical vortex model including the impact of ambient turbulence on vortex linking and decay. The velocity profile of a fully rolled-up vortex pair at around t * = 1.0 agrees well with the Rosenhead–Burnham–Hallock vortex model.


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    Title :

    Large-Eddy Simulation of Aircraft Wake Evolution from Roll-Up Until Vortex Decay


    Contributors:

    Published in:

    AIAA Journal ; 53 , 9 ; 2646-2670


    Publication date :

    2015-03-17


    Size :

    25 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    Large-Eddy Simulation of Wake Vortex Evolution from Roll-Up to Vortex Decay

    Misaka, Takashi / Holzäpfel, Frank / Gerz, Thomas et al. | German Aerospace Center (DLR) | 2011

    Free access

    LARGE-EDDY SIMULATION OF WAKE VORTEX EVOLUTION FROM ROLL-UP TO VORTEX DECAY

    Misaka, T. / Holzapfel, F. / Gerz, T. et al. | British Library Conference Proceedings | 2011


    Large-Eddy Simulation of Wake Vortex Evolution from Roll-Up to Vortex Decay

    Misaka, Takashi / Holzäpfel, Frank / Gerz, Thomas et al. | AIAA | 2011


    Large-Eddy Simulation of Wake Vortex Evolution from Roll-Up to Decay

    Misaka, Takashi / Holzäpfel, Frank / Gerz, Thomas | German Aerospace Center (DLR) | 2012

    Free access