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

Rui ZHAO; Yuxiang FAN; Xiao LIU; Chih-yung 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, Chih-yung Wen (Corresponding Author)

Department of Aeronautical and Aviation Engineering

Research output: Journal article publication › Letter › 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
Number of pages	6
Journal	Physics of Fluids
Volume	34
Issue number	12
DOIs	https://doi.org/10.1063/5.0131427
Publication status	Published - 12 Dec 2022

Keywords

Linear stability analysis
Acoustics
Metamaterials
Flow control
Flow instabilities
Hypersonic flows
Boundary layer flow

More information

10.1063/5.0131427

http://hdl.handle.net/10397/111149

Cite this

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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.",

keywords = "Linear stability analysis, Acoustics, Metamaterials, Flow control, Flow instabilities, Hypersonic flows, Boundary layer flow",

author = "Rui ZHAO and Yuxiang FAN and Xiao LIU and Chih-yung Wen",

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AU - ZHAO, Rui

AU - FAN, Yuxiang

AU - LIU, Xiao

AU - Wen, Chih-yung

PY - 2022/12/12

Y1 - 2022/12/12

N2 - 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.

AB - 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.

KW - Linear stability analysis

KW - Acoustics

KW - Metamaterials

KW - Flow control

KW - Flow instabilities

KW - Hypersonic flows

KW - Boundary layer flow

U2 - 10.1063/5.0131427

DO - 10.1063/5.0131427

M3 - Letter

SN - 1070-6631

VL - 34

JO - Physics of Fluids

JF - Physics of Fluids

IS - 12

M1 - 121706

ER -

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

Abstract

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