TY - GEN
T1 - Effect of Flow-Induced Surface Vibration on Deep Cavity Aeroacoustics
AU - Naseer, Muhammad Rehan
AU - Arif, Irsalan
AU - Lam, Garret C.Y.
AU - Leung, Randolph C.K.
N1 - Funding Information:
The authors gratefully acknowledge the support from the Research Grants Council of the Government of Hong Kong Special Administrative Region under grant number 15208520. The first author is grateful to stipend support to his study from the Department of Mechanical Engineering, The Hong Kong Polytechnic University. The second and fourth authors are grateful to a generous research donation from Philip K. H. Wong Foundation under grant number 5-ZH1X (now N -ZH1)X .
Publisher Copyright:
© 2022, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2022/6/13
Y1 - 2022/6/13
N2 - This study examines an elastic panel flush-mounted on the bottom wall of a deep cavity, under the subsonic flow condition of Mach number 0.09, as a passive approach to the tonal noise abatement. The interaction between acoustically excited cavity modes and an elastic panel installed on the cavity bottom wall is investigated using direct aeroacoustics simulation. The panel is carefully designed to maintain the natural frequency of the panel vibration in compliance with the flow frequency. Two different materials, steel and rubber, are selected for the panel design to ascertain the effect of material on the panel response to the standing cavity modes to leverage the reduction of tonal noise emissions. Numerical findings have substantiated the marked improvement in noise suppression and coefficient of pressure. Furthermore, based on a comparative analysis, the panel with elastomeric properties has shown the best potential for the tonal noise reduction.
AB - This study examines an elastic panel flush-mounted on the bottom wall of a deep cavity, under the subsonic flow condition of Mach number 0.09, as a passive approach to the tonal noise abatement. The interaction between acoustically excited cavity modes and an elastic panel installed on the cavity bottom wall is investigated using direct aeroacoustics simulation. The panel is carefully designed to maintain the natural frequency of the panel vibration in compliance with the flow frequency. Two different materials, steel and rubber, are selected for the panel design to ascertain the effect of material on the panel response to the standing cavity modes to leverage the reduction of tonal noise emissions. Numerical findings have substantiated the marked improvement in noise suppression and coefficient of pressure. Furthermore, based on a comparative analysis, the panel with elastomeric properties has shown the best potential for the tonal noise reduction.
UR - http://www.scopus.com/inward/record.url?scp=85135065247&partnerID=8YFLogxK
U2 - 10.2514/6.2022-2958
DO - 10.2514/6.2022-2958
M3 - Conference article published in proceeding or book
AN - SCOPUS:85135065247
SN - 9781624106644
T3 - 28th AIAA/CEAS Aeroacoustics Conference, 2022
BT - 28th AIAA/CEAS Aeroacoustics Conference, 2022
PB - American Institute of Aeronautics and Astronautics Inc. (AIAA)
T2 - 28th AIAA/CEAS Aeroacoustics Conference, 2022
Y2 - 14 June 2022 through 17 June 2022
ER -