Stabilization of the Mack second mode is of great significance to control hypersonic boundary-layer transitions. Based on the generalized Snell’s law, this work proposes a reflection-controlled metasurface that can restrain the Mack second mode instability by controlling the reflection directions of disturbance waves and consequently stabilize hypersonic boundary-layer flow. The metasurface is periodically corrugated with subwavelength groove groups: each of which is composed of several grooves with different depths. The direct numerical simulation results of a Mach 6 flat-plate boundary layer indicate that the reflection-controlled metasurfaces divide the “two-cell” structure of the Mack second mode into several small parts, and that largely inhibits the growth of the Mack second mode.


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    Title :

    Control of Reflected Waves with Acoustic Metasurfaces for Hypersonic Boundary-Layer Stabilization


    Contributors:
    Zhao, Rui (author) / Dong, Ying (author) / Zhang, Xinxin (author) / Wen, Chihyung (author) / Long, Tiehan (author) / Yuan, Wu (author)

    Published in:

    AIAA Journal ; 59 , 6 ; 1893-1898


    Publication date :

    2021-04-27


    Size :

    6 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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