A combination of parabolized stability equations and secondary instability theory has been applied to a low-speed swept airfoil model with a chord Reynolds number of 7.15 million, with the goals of (i) evaluating this methodology in the context of transition prediction for a known configuration for which roughness based crossflow transition control has been demonstrated under flight conditions and (ii) of analyzing the mechanism of transition delay via the introduction of discrete roughness elements (DRE). Roughness based transition control involves controlled seeding of suitable, subdominant crossflow modes, so as to weaken the growth of naturally occurring, linearly more unstable crossflow modes. Therefore, a synthesis of receptivity, linear and nonlinear growth of stationary crossflow disturbances, and the ensuing development of high frequency secondary instabilities is desirable to understand the experimentally observed transition behavior. With further validation, such higher fidelity prediction methodology could be utilized to assess the potential for crossflow transition control at even higher Reynolds numbers, where experimental data is currently unavailable.


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    Titel :

    Roughness Based Crossflow Transition Control: A Computational Assessment


    Beteiligte:
    Li, Fei (Autor:in) / Choudhari, Meelan M. (Autor:in) / Chang, Chau-Lyan (Autor:in) / Streett, Craig L. (Autor:in) / Carpenter, Mark H. (Autor:in)

    Kongress:

    27th AIAA Applied Aerodynamics Conference ; 2009 ; Texas, United States


    Erscheinungsdatum :

    2009-06-22


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Roughness Based Crossflow Transition Control: A Computational Assessment

    Li, F. / Choudhari, M. / Chang, C. et al. | British Library Conference Proceedings | 2009


    Roughness Based Crossflow Transition Control: A Computational Assessment

    Li, Fei / Choudhari, Meelan / Chang, Chau-Lyan et al. | AIAA | 2009


    Roughness Based Crossflow Transition Control for a Swept Wing Airfoil Design

    Li, Fei / Choudhari, Meelan / Carpenter, Mark et al. | AIAA | 2010



    Control of Crossflow Transition at High Reynolds Numbers Using Discrete Roughness Elements

    Li, Fei / Choudhari, Meelan / Carpenter, Mark et al. | AIAA | 2015