The long-time development of an isolated wing-tip turbulent vortex has been studied by Reynolds-averaged Navier-Stokes computations. The vortex is assumed to extend to infinity and to be axisymmetric and homogeneous in the axial direction, and the axial velocity is assumed to be negligible. The validity of different turbulence models, ranging from Reynolds stress transport models to eddy-viscosity K-epsilon models, has been assessed and qualitative comparisons with field measurements are made. Reynolds stress transport models correctly predict strong suppression of the turbulence in the rotation-dominated vortex core and a reasonable decay rate of the vortex. Outside of the core, the different Reynolds stress models differ significantly. The standard eddy-viscosity K-epsilon model is insensitive to rotation and, thus, overpredicts the vortex decay rate. Computations using explicit algebraic Reynolds stress models that are strictly based on Reynolds stress transport models show that the algebraic form compares reasonably well with the full transport form. It is, however, important that the curved flow algebraic assumption is invoked when deriving the explicit algebraic model.


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    Title :

    Evolution of an isolated turbulent trailing vortex


    Additional title:

    Entwicklung eines einzelnen turbulenten Spitzenwirbels


    Contributors:
    Wallin, S. (author) / Girimaji, S.S. (author)

    Published in:

    AIAA Journal ; 38 , 4 ; 657-665


    Publication date :

    2000


    Size :

    9 Seiten, 9 Bilder, 1 Tabelle, 29 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Evolution of an Isolated Turbulent Trailing Vortex

    Stefan Wallin / Sharath S. Girimaji | AIAA | 2000




    Organized nature of a turbulent trailing vortex

    Bandyopadhyay, Promode R. / Ash, Robert L. / Stead, Daniel J. | NTRS | 1991


    Organized nature of a turbulent trailing vortex

    BANDYOPADHYAY, PROMODE R. / ASH, ROBERT L. / STEAD, DANIEL J. | AIAA | 1991