An experimental study has been conducted to investigate unsteady flow phenomena observed within various two-dimensional configurations of shock/boundary-layer interactions. Six configurations have been tested in Mach 2 flow: φ 1 = 14 and 20° compression ramps, and incident shock reflections from φ 1 = 7 , 8, 9, and 10° shock generators; Reynolds numbers in each case are R e θ 8350 . The flow is assessed using an array of fast-response pressure transducers in conjunction with a high-repetition rate particle image velocimetry system. Development of the mean flow structures early in each interaction is observed to be consistent with the free interaction concept. Unsteady wall-pressure energy content at frequencies above those associated with the characteristic low-frequency shock motion also shows significant similarities in the vicinity of the shock foot. Results confirm that this low-frequency peak is not associated with a narrow-band forcing mechanism from either upstream or downstream, but rather a characteristic frequency that varies with interaction strength, which describes the flow’s dynamic response. These findings support various models published in the literature that have sought to explain the source of low-frequency unsteady shock motion.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Unsteady Flow Features Across Different Shock/Boundary-Layer Interaction Configurations


    Beteiligte:

    Erschienen in:

    AIAA Journal ; 58 , 7 ; 3063-3075


    Erscheinungsdatum :

    2020-06-04


    Format / Umfang :

    13 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





    Comparison of Unsteady Flow Similarities in Various Shock/Boundary-Layer Interaction Configurations (AIAA 2017-0986)

    Threadgill, James A. / Bruce, Paul J. | British Library Conference Proceedings | 2017



    DNS of Unsteady Shock Boundary Layer Interaction

    Muppidi, Suman / Mahesh, Krishnan | AIAA | 2011


    DNS OF UNSTEADY SHOCK BOUNDARY LAYER INTERACTION

    Muppidi, S. / Mahesh, K. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2011