In this study, the effectiveness of repetitive laser pulse energy deposition over a double-cone model in a Mach 1.92 flow (half-apex angles of 22 and 40 deg) was investigated experimentally. The Reynolds number, based on the model’s outer diameter, was 3 × 10 5 . Because of the shock wave/boundary-layer interaction, the shock wave over the cone’s transition corner exhibited an inherent low-frequency oscillation with a characteristic frequency of 6.3 kHz. Using high-frequency laser deposition of up to 80 kHz, the oscillation of the shock system was suppressed. Although the boundary layer experienced “sweeping” by laser-heated rings with a primary frequency equal to that of the energy deposition, the shock system above the bubble passage experienced frequency modulation to a much lower frequency range, and the shock wave location was stabilized.


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    Titel :

    Impacts of Laser Energy Deposition on Flow Instability over Double-Cone Model


    Beteiligte:
    Pham, Hoang Son (Autor:in) / Shoda, Tatsuro (Autor:in) / Tamba, Takahiro (Autor:in) / Iwakawa, Akira (Autor:in) / Sasoh, Akihiro (Autor:in)

    Erschienen in:

    AIAA Journal ; 55 , 9 ; 2992-3000


    Erscheinungsdatum :

    2017-06-28


    Format / Umfang :

    9 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





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