Mode Switching in a Compressible Rectangular Cavity Flow

Yi Xuan Huang; Kung Ming Chung

doi:10.3390/aerospace10060504

Mode Switching in a Compressible Rectangular Cavity Flow

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Abstract

This study determines the mean and fluctuating pressures for flow through a rectangular shallow cavity (ratio between the length and the depth = 2.43, 4.43, and 6.14; ratio between the length and the width = 0.5, 1.0, and 2.0) at a Mach number of 0.64 in a blowdown transonic wind tunnel. A amplitude modulation analysis is used for the post-processing of the fluctuating pressure signals. The spectral analysis (wavelet) shows the intermittent behavior of the discrete Rossiter–Heller modes. A correlation analysis determines that mode switching is more significant between the second and third modes (organized structures that are associated with shear layer vortices), particularly for two-dimensional and shallower cavities.

Original language	English
Article number	504
Journal	Aerospace
Volume	10
Issue number	6
DOIs	https://doi.org/10.3390/aerospace10060504
Publication status	Published - 2023 Jun

All Science Journal Classification (ASJC) codes

Aerospace Engineering

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10.3390/aerospace10060504

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title = "Mode Switching in a Compressible Rectangular Cavity Flow",

abstract = "This study determines the mean and fluctuating pressures for flow through a rectangular shallow cavity (ratio between the length and the depth = 2.43, 4.43, and 6.14; ratio between the length and the width = 0.5, 1.0, and 2.0) at a Mach number of 0.64 in a blowdown transonic wind tunnel. A amplitude modulation analysis is used for the post-processing of the fluctuating pressure signals. The spectral analysis (wavelet) shows the intermittent behavior of the discrete Rossiter–Heller modes. A correlation analysis determines that mode switching is more significant between the second and third modes (organized structures that are associated with shear layer vortices), particularly for two-dimensional and shallower cavities.",

author = "Huang, {Yi Xuan} and Chung, {Kung Ming}",

note = "Funding Information: This research was funded by the National Science and Technology Council, Taiwan, grant number MOST 110-2221-E-006-097. Publisher Copyright: {\textcopyright} 2023 by the authors.",

year = "2023",

month = jun,

doi = "10.3390/aerospace10060504",

language = "English",

volume = "10",

journal = "Aerospace",

issn = "2226-4310",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

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T1 - Mode Switching in a Compressible Rectangular Cavity Flow

AU - Huang, Yi Xuan

AU - Chung, Kung Ming

PY - 2023/6

Y1 - 2023/6

N2 - This study determines the mean and fluctuating pressures for flow through a rectangular shallow cavity (ratio between the length and the depth = 2.43, 4.43, and 6.14; ratio between the length and the width = 0.5, 1.0, and 2.0) at a Mach number of 0.64 in a blowdown transonic wind tunnel. A amplitude modulation analysis is used for the post-processing of the fluctuating pressure signals. The spectral analysis (wavelet) shows the intermittent behavior of the discrete Rossiter–Heller modes. A correlation analysis determines that mode switching is more significant between the second and third modes (organized structures that are associated with shear layer vortices), particularly for two-dimensional and shallower cavities.

AB - This study determines the mean and fluctuating pressures for flow through a rectangular shallow cavity (ratio between the length and the depth = 2.43, 4.43, and 6.14; ratio between the length and the width = 0.5, 1.0, and 2.0) at a Mach number of 0.64 in a blowdown transonic wind tunnel. A amplitude modulation analysis is used for the post-processing of the fluctuating pressure signals. The spectral analysis (wavelet) shows the intermittent behavior of the discrete Rossiter–Heller modes. A correlation analysis determines that mode switching is more significant between the second and third modes (organized structures that are associated with shear layer vortices), particularly for two-dimensional and shallower cavities.

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Mode Switching in a Compressible Rectangular Cavity Flow

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