Boundary-layer stability analyses of mean flows extracted from unstructured-grid Navier–Stokes solutions have been performed. A procedure has been developed to extract mean flow profiles from the FUN3D unstructured-grid solutions for the purpose of stability analysis. Extensive code-to-code validations were performed by comparing the extracted mean flows as well as the corresponding stability characteristics to the predictions based on structured-grid mean flow solutions. Comparisons were made for a set of progressively complex geometric configurations ranging from a simple flat plate to a full aircraft configuration: a modified Gulfstream III with a natural laminar-flow glove. The results for the swept wing flow over the wing–glove assembly point to the need for stability analysis based on Navier–Stokes solutions or possibly fully three-dimensional boundary-layer codes when the underlying flow develops strong three-dimensionality. The effect of grid resolution, mean flow convergence, and low-order interpolation to a stability grid on metrics relevant to linear stability of the boundary-layer flow are also examined to provide guidelines for the use of both structured and unstructured grids in practical applications related to transition prediction for swept wing boundary layers.


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    Titel :

    Boundary-Layer Stability Analysis of the Mean Flows Obtained Using Unstructured Grids


    Beteiligte:
    Liao, Wei (Autor:in) / Malik, Mujeeb R. (Autor:in) / Lee-Rausch, Elizabeth M. (Autor:in) / Li, Fei (Autor:in) / Nielsen, Eric J. (Autor:in) / Buning, Pieter G. (Autor:in) / Choudhari, Meelan (Autor:in) / Chang, Chau-Lyan (Autor:in)

    Erschienen in:

    Journal of Aircraft ; 52 , 1 ; 49-63


    Erscheinungsdatum :

    2014-06-16


    Format / Umfang :

    15 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





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    Liao, W. / Malik, M. / Lee-Rausch, E. et al. | British Library Conference Proceedings | 2012


    Boundary-Layer Stability Analysis of the Mean Flows Obtained Using Unstructured Grids

    Liao, Wei / Malik, Mujeeb / Lee-Rausch, Elizabeth et al. | AIAA | 2012



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