Jet installation noise reduction using porous treatments

Hasan Kamliya Jawahar; Sergey Karabasov; Mahdi Azarpeyvand

doi:10.1016/j.jsv.2022.117406

Jet installation noise reduction using porous treatments

Hasan Kamliya Jawahar^*, Sergey Karabasov^*, Mahdi Azarpeyvand^*

^*Corresponding author for this work

Fluid and Aerodynamics

Research output: Contribution to journal › Article (Academic Journal) › peer-review

12 Citations (Scopus)

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Abstract

The possibility of jet-installation noise reduction has been experimentally demonstrated using a flat-plate fitted with flow permeable metal foam fitted at the trailing-edge. Tests were conducted for single-stream cold subsonic jets with a round nozzle adjacent to a flat-plate for a wide range of flow velocities (M = 0.3 - 0.9) in an anechoic chamber. Thorough investigations of the far-field noise for various polar angles were carried out to demonstrate the regions with noise reduction. Four porous trailing-edges were tested with various increasing permeability and surface roughness. Far-field results showed substantial noise reduction for the installed configuration fitted with porous trailing-edges. Overall sound pressure level scaling with velocity demonstrates that trailing-edge scattering noise is reduced by the application of from porous trailing-edge. Detailed analysis using coherence and correlations of the far-field results are also presented to gain a better understanding of the effects of different porous materials. The effect of plate distance was also investigated and the results showed tonal characteristics for cases with high surface roughness. Overall, a thorough experimental study is provided for understanding the jet installation noise reduction mechanism using porous trailing-edges.

Original language	English
Article number	117406
Pages (from-to)	1-19
Journal	Journal of Sound and Vibration
Volume	545
Early online date	4 Nov 2022
DOIs	https://doi.org/10.1016/j.jsv.2022.117406
Publication status	Published - 17 Feb 2023

Bibliographical note

Funding Information:
The authors would like to acknowledge the Engineering and Physical Sciences Research Council (EPSRC), UK for supporting this research (Grant No. EP/S000917/1 ). The first author would like to acknowledge Dr. Xiao Liu for providing the CAD design for the aeroacoustic facility for the purpose of illustration. The first author would also like to acknowledge the phenomenal work done by Dr. Syamir Alihan S. A. on characterizing the porous material used in the present study.

Publisher Copyright:
© 2022 The Author(s)

Keywords

Aeroacoustics
jet noise
jet installation
porous trailing-edge
noise reduction

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title = "Jet installation noise reduction using porous treatments",

abstract = "The possibility of jet-installation noise reduction has been experimentally demonstrated using a flat-plate fitted with flow permeable metal foam fitted at the trailing-edge. Tests were conducted for single-stream cold subsonic jets with a round nozzle adjacent to a flat-plate for a wide range of flow velocities (M = 0.3 - 0.9) in an anechoic chamber. Thorough investigations of the far-field noise for various polar angles were carried out to demonstrate the regions with noise reduction. Four porous trailing-edges were tested with various increasing permeability and surface roughness. Far-field results showed substantial noise reduction for the installed configuration fitted with porous trailing-edges. Overall sound pressure level scaling with velocity demonstrates that trailing-edge scattering noise is reduced by the application of from porous trailing-edge. Detailed analysis using coherence and correlations of the far-field results are also presented to gain a better understanding of the effects of different porous materials. The effect of plate distance was also investigated and the results showed tonal characteristics for cases with high surface roughness. Overall, a thorough experimental study is provided for understanding the jet installation noise reduction mechanism using porous trailing-edges.",

keywords = "Aeroacoustics, jet noise, jet installation, porous trailing-edge, noise reduction",

author = "\{Kamliya Jawahar\}, Hasan and Sergey Karabasov and Mahdi Azarpeyvand",

note = "Funding Information: The authors would like to acknowledge the Engineering and Physical Sciences Research Council (EPSRC), UK for supporting this research (Grant No. EP/S000917/1 ). The first author would like to acknowledge Dr. Xiao Liu for providing the CAD design for the aeroacoustic facility for the purpose of illustration. The first author would also like to acknowledge the phenomenal work done by Dr. Syamir Alihan S. A. on characterizing the porous material used in the present study. Publisher Copyright: {\textcopyright} 2022 The Author(s)",

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doi = "10.1016/j.jsv.2022.117406",

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T1 - Jet installation noise reduction using porous treatments

AU - Kamliya Jawahar, Hasan

AU - Karabasov, Sergey

AU - Azarpeyvand, Mahdi

N1 - Funding Information: The authors would like to acknowledge the Engineering and Physical Sciences Research Council (EPSRC), UK for supporting this research (Grant No. EP/S000917/1 ). The first author would like to acknowledge Dr. Xiao Liu for providing the CAD design for the aeroacoustic facility for the purpose of illustration. The first author would also like to acknowledge the phenomenal work done by Dr. Syamir Alihan S. A. on characterizing the porous material used in the present study. Publisher Copyright: © 2022 The Author(s)

PY - 2023/2/17

Y1 - 2023/2/17

N2 - The possibility of jet-installation noise reduction has been experimentally demonstrated using a flat-plate fitted with flow permeable metal foam fitted at the trailing-edge. Tests were conducted for single-stream cold subsonic jets with a round nozzle adjacent to a flat-plate for a wide range of flow velocities (M = 0.3 - 0.9) in an anechoic chamber. Thorough investigations of the far-field noise for various polar angles were carried out to demonstrate the regions with noise reduction. Four porous trailing-edges were tested with various increasing permeability and surface roughness. Far-field results showed substantial noise reduction for the installed configuration fitted with porous trailing-edges. Overall sound pressure level scaling with velocity demonstrates that trailing-edge scattering noise is reduced by the application of from porous trailing-edge. Detailed analysis using coherence and correlations of the far-field results are also presented to gain a better understanding of the effects of different porous materials. The effect of plate distance was also investigated and the results showed tonal characteristics for cases with high surface roughness. Overall, a thorough experimental study is provided for understanding the jet installation noise reduction mechanism using porous trailing-edges.

AB - The possibility of jet-installation noise reduction has been experimentally demonstrated using a flat-plate fitted with flow permeable metal foam fitted at the trailing-edge. Tests were conducted for single-stream cold subsonic jets with a round nozzle adjacent to a flat-plate for a wide range of flow velocities (M = 0.3 - 0.9) in an anechoic chamber. Thorough investigations of the far-field noise for various polar angles were carried out to demonstrate the regions with noise reduction. Four porous trailing-edges were tested with various increasing permeability and surface roughness. Far-field results showed substantial noise reduction for the installed configuration fitted with porous trailing-edges. Overall sound pressure level scaling with velocity demonstrates that trailing-edge scattering noise is reduced by the application of from porous trailing-edge. Detailed analysis using coherence and correlations of the far-field results are also presented to gain a better understanding of the effects of different porous materials. The effect of plate distance was also investigated and the results showed tonal characteristics for cases with high surface roughness. Overall, a thorough experimental study is provided for understanding the jet installation noise reduction mechanism using porous trailing-edges.

KW - Aeroacoustics

KW - jet noise

KW - jet installation

KW - porous trailing-edge

KW - noise reduction

U2 - 10.1016/j.jsv.2022.117406

DO - 10.1016/j.jsv.2022.117406

M3 - Article (Academic Journal)

SN - 0022-460X

VL - 545

SP - 1

EP - 19

JO - Journal of Sound and Vibration

JF - Journal of Sound and Vibration

M1 - 117406

ER -

Jet installation noise reduction using porous treatments

Abstract

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