Mitigation of Cavity Noise with Aeroacoustically Excited Surface Panels

Muhammad Rehan Naseer; Irsalan Arif; Randolph C. K. Leung

doi:10.1007/978-3-031-73935-4_8

Mitigation of Cavity Noise with Aeroacoustically Excited Surface Panels

Muhammad Rehan Naseer, Irsalan Arif, Randolph C. K. Leung^*

^*Corresponding author for this work

School of Civil, Aerospace and Design Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

Abstract

This study has employed a unique concept to mitigate the deep cavity aeroacoustics at low Mach number through the utilization of localized surface compliance. The key idea is to absorb the energy from the aeroacoustic processes of a self-sustained feedback loop in cavity flow, which generates a tonal noise. A thorough examination of this concept has been carried out using high-fidelity, two-dimensional direct aeroacoustic simulation at a Reynolds number of 4 × 104 and a Mach number of 0.09. To achieve noise suppression, an elastic panel with a natural frequency matching the characteristic frequency of the cavity aeroacoustic feedback loop has been strategically introduced to modify the process. As a result, there is a 15 dB reduction in cavity noise, along with a 20% decrease in the cavity drag. The proposed concept successfully suppresses cavity noise and drag while maintaining the basic problem geometry, which is crucial for practical applications.

Original language	English
Title of host publication	Flinovia-Flow Induced Noise and Vibration Issues and Aspects-IV
Editors	Con Doolan, Danielle Moreau, Angus Wills
Publisher	Springer Nature
Pages	143-159
Number of pages	17
ISBN (Electronic)	9783031739354
ISBN (Print)	9783031739347
DOIs	https://doi.org/10.1007/978-3-031-73935-4_8
Publication status	Published - 13 Feb 2025
Event	Flow Induced Noise and Vibration Issues and Aspects IV - Australia, Sydney, Australia Duration: 22 May 2023 → 24 May 2023 https://conference.unsw.edu.au/en/Flinovia

Conference

Conference	Flow Induced Noise and Vibration Issues and Aspects IV
Abbreviated title	Flinovia IV
Country/Territory	Australia
City	Sydney
Period	22/05/23 → 24/05/23
Internet address	https://conference.unsw.edu.au/en/Flinovia

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© 2025 The Author(s), under exclusive license to Springer Nature Switzerland AG

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title = "Mitigation of Cavity Noise with Aeroacoustically Excited Surface Panels",

abstract = "This study has employed a unique concept to mitigate the deep cavity aeroacoustics at low Mach number through the utilization of localized surface compliance. The key idea is to absorb the energy from the aeroacoustic processes of a self-sustained feedback loop in cavity flow, which generates a tonal noise. A thorough examination of this concept has been carried out using high-fidelity, two-dimensional direct aeroacoustic simulation at a Reynolds number of 4 × 104 and a Mach number of 0.09. To achieve noise suppression, an elastic panel with a natural frequency matching the characteristic frequency of the cavity aeroacoustic feedback loop has been strategically introduced to modify the process. As a result, there is a 15 dB reduction in cavity noise, along with a 20\% decrease in the cavity drag. The proposed concept successfully suppresses cavity noise and drag while maintaining the basic problem geometry, which is crucial for practical applications.",

author = "Naseer, \{Muhammad Rehan\} and Irsalan Arif and Leung, \{Randolph C. K.\}",

note = "Publisher Copyright: {\textcopyright} 2025 The Author(s), under exclusive license to Springer Nature Switzerland AG; Flow Induced Noise and Vibration Issues and Aspects IV, Flinovia IV ; Conference date: 22-05-2023 Through 24-05-2023",

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Naseer, MR, Arif, I & Leung, RCK 2025, Mitigation of Cavity Noise with Aeroacoustically Excited Surface Panels. in C Doolan, D Moreau & A Wills (eds), Flinovia-Flow Induced Noise and Vibration Issues and Aspects-IV. Springer Nature, pp. 143-159, Flow Induced Noise and Vibration Issues and Aspects IV, Sydney, New South Wales, Australia, 22/05/23. https://doi.org/10.1007/978-3-031-73935-4_8

Mitigation of Cavity Noise with Aeroacoustically Excited Surface Panels. / Naseer, Muhammad Rehan; Arif, Irsalan; Leung, Randolph C. K.
Flinovia-Flow Induced Noise and Vibration Issues and Aspects-IV. ed. / Con Doolan; Danielle Moreau; Angus Wills. Springer Nature, 2025. p. 143-159.

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

TY - GEN

T1 - Mitigation of Cavity Noise with Aeroacoustically Excited Surface Panels

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AU - Leung, Randolph C. K.

PY - 2025/2/13

Y1 - 2025/2/13

N2 - This study has employed a unique concept to mitigate the deep cavity aeroacoustics at low Mach number through the utilization of localized surface compliance. The key idea is to absorb the energy from the aeroacoustic processes of a self-sustained feedback loop in cavity flow, which generates a tonal noise. A thorough examination of this concept has been carried out using high-fidelity, two-dimensional direct aeroacoustic simulation at a Reynolds number of 4 × 104 and a Mach number of 0.09. To achieve noise suppression, an elastic panel with a natural frequency matching the characteristic frequency of the cavity aeroacoustic feedback loop has been strategically introduced to modify the process. As a result, there is a 15 dB reduction in cavity noise, along with a 20% decrease in the cavity drag. The proposed concept successfully suppresses cavity noise and drag while maintaining the basic problem geometry, which is crucial for practical applications.

AB - This study has employed a unique concept to mitigate the deep cavity aeroacoustics at low Mach number through the utilization of localized surface compliance. The key idea is to absorb the energy from the aeroacoustic processes of a self-sustained feedback loop in cavity flow, which generates a tonal noise. A thorough examination of this concept has been carried out using high-fidelity, two-dimensional direct aeroacoustic simulation at a Reynolds number of 4 × 104 and a Mach number of 0.09. To achieve noise suppression, an elastic panel with a natural frequency matching the characteristic frequency of the cavity aeroacoustic feedback loop has been strategically introduced to modify the process. As a result, there is a 15 dB reduction in cavity noise, along with a 20% decrease in the cavity drag. The proposed concept successfully suppresses cavity noise and drag while maintaining the basic problem geometry, which is crucial for practical applications.

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T2 - Flow Induced Noise and Vibration Issues and Aspects IV

Y2 - 22 May 2023 through 24 May 2023

ER -

Mitigation of Cavity Noise with Aeroacoustically Excited Surface Panels

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