In this paper, results from two experiments performed at California Institute of Technology’s T5 free-piston reflected shock tunnel are compared to numerical stability computations conducted using various stability analysis tools. The goal of this comparison is to begin understanding the range of boundary-layer transition predictability using different stability approaches for high-enthalpy flows. The analysis is focused on the physics of the second-mode instability at high enthalpy and the role of high-temperature effects. Although the stability solvers considering thermochemical nonequilibrium were best at estimating the measured second-mode frequency ( f 2 M 1250    kHz for shot 2990, f 2 M 1235    kHz for shot 3019), they overpredicted the most amplified frequency by approximately 16–23%. A moderate spread in the predicted most amplified frequency was also observed between the different solvers. The solvers estimated a most amplified frequency range of approximately 1450–1550 kHz for shot 2990 and approximately 1525–1650 kHz for shot 3019. There was also significant inconsistency observed in predicting the peak N -factor magnitude, ranging from N = 12.5 16 for shot 2990 and from N = 12.3 19 for shot 3019.


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    Titel :

    High-Enthalpy Effects on Hypersonic Boundary-Layer Transition: Experimental and Numerical Comparison


    Beteiligte:
    Hameed, Ahsan (Autor:in) / Parziale, Nick J. (Autor:in) / Kuehl, Joseph (Autor:in) / Liang, Tony (Autor:in) / Graziose, Kevin (Autor:in) / Brehm, Christoph (Autor:in) / Dungan, Sean David (Autor:in) / Brazier, Jean-Philippe (Autor:in) / Paquin, Laura (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    01.04.2025




    Medientyp :

    Aufsatz (Konferenz) , Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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