A universal criterion of the beginning of laminar flow turbulization in swept-wing boundary layers was found recently. This is a rather simple criterion: a threshold combined amplitude of boundary-layer disturbances (i.e. sum of zero-to-peak amplitudes of steady and traveling cross-flow instability modes) observed just prior to the transition beginning point in which one of kinds of local high-frequency secondary instability appears. The present paper is devoted to additional substantiation of the concept of universal criterion in the cases of elevated freestream turbulence levels and enhanced amplitudes of steady freestream vortices, as well as to development of ways of calculation of the transition beginning location based of the threshold combined amplitude criterion and on a generalized variable N-factor approach.


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    Title :

    Problem of calculation of swept-wing boundary-layer transition to turbulence at elevated freestream turbulence levels


    Contributors:

    Conference:

    INTERNATIONAL CONFERENCE ON THE METHODS OF AEROPHYSICAL RESEARCH (ICMAR 2016): Proceedings of the 18th International Conference on the Methods of Aerophysical Research ; 2016 ; Perm, Russia


    Published in:

    Publication date :

    2016-10-13


    Size :

    39 pages





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English