Stabilization effect of acoustic metasurfaces on broadband disturbances in a Mach 6 boundary-layer flow

Rui Zhao; Yuxiang Fan; Xiao Liu; Chihyung Wen

doi:10.1063/5.0131427

Stabilization effect of acoustic metasurfaces on broadband disturbances in a Mach 6 boundary-layer flow

Rui Zhao, Yuxiang Fan, Xiao Liu, Chihyung Wen^*

^*Corresponding author for this work

School of Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

In this study, acoustic metasurfaces are optimized to suppress broadband frequencies of unstable modes in a Mach 6 boundary-layer flow. The metasurface is cut into five pieces, and geometrical parameters of each piece are optimized to afford a comprehensive admittance response to the local frequencies of the first and second modes. It shows the designed broadband metasurface not only is advantageous for stabilizing disturbances above the metasurface region but also inhibits the fast growth rate of low-frequency disturbances on the downstream smooth wall.

Original language	English
Article number	121706
Journal	Physics of Fluids
Volume	34
Issue number	12
DOIs	https://doi.org/10.1063/5.0131427
Publication status	Published - 1 Dec 2022

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10.1063/5.0131427

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abstract = "In this study, acoustic metasurfaces are optimized to suppress broadband frequencies of unstable modes in a Mach 6 boundary-layer flow. The metasurface is cut into five pieces, and geometrical parameters of each piece are optimized to afford a comprehensive admittance response to the local frequencies of the first and second modes. It shows the designed broadband metasurface not only is advantageous for stabilizing disturbances above the metasurface region but also inhibits the fast growth rate of low-frequency disturbances on the downstream smooth wall.",

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Stabilization effect of acoustic metasurfaces on broadband disturbances in a Mach 6 boundary-layer flow

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