This study uses direct numerical simulation and stability analysis methods to investigate the impact of wall cavity defects on the instability of boundary layers at M a = 5.92 and M a = 1.38 . For flow at M a = 5.92 , synchronization points with equal phase velocities in both fast and slow modes play a crucial role in controlling disturbance wave growth. When the inlet disturbance wave frequency ( ω = 0.98 ) approaches the synchronization point frequency, the impact of cavity size on the growth of the disturbance wave can be divided into three regions in the ( L / δ 99 , D / δ 99 ) plane, namely, region A, region B, and region C. Region A refers to small cavities with L / δ 99 < 2 , which have the weakest suppression effect. Region B includes large cavities with L / δ 99 > 2 and D / δ 99 < 1.5 and exhibits the best suppression effect. Finally, region C covers cavities with L / δ 99 > 3 and D / δ 99 > 1.5 and shows a non-monotonic control effect on the growth of disturbance wave as the cavity depth varies. For flow at M a = 1.38 , cavities of different sizes always enhance the growth of disturbance waves. The widest and shallowest cavities ( L / δ 99 > 5 , D / δ 99 < 2 ) exhibit the most significant enhancement.


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    Titel :

    Stability Analysis for High-Speed Boundary-Layer Flow with Cavities


    Beteiligte:
    Feng, Shuo (Autor:in) / Tu, Guohua (Autor:in) / Yang, Qiang (Autor:in) / Wang, Bofu (Autor:in) / Zhou, Quan (Autor:in) / Chen, Jianqiang (Autor:in)

    Erschienen in:

    AIAA Journal ; 62 , 5 ; 1744-1754


    Erscheinungsdatum :

    2024-01-26


    Format / Umfang :

    11 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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