On Investigating the Hydrodynamic Field for Jets with and without Installation Effects

Hasan Kamliya Jawahar; Mahdi Azarpeyvand

doi:10.2514/6.2022-2907

On Investigating the Hydrodynamic Field for Jets with and without Installation Effects

Hasan Kamliya Jawahar^*, Mahdi Azarpeyvand

^*Corresponding author for this work

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

2 Citations (Scopus)

124 Downloads (Pure)

Abstract

Near-field hydrodynamic and acoustic characteristics of an unheated subsonic jet with chevron nozzles were investigated experimentally with and without jet installation effects. Near-field pressure fluctuations were acquired for Mach numbers ranging from 0.3 to 0.9 for four different types of chevron nozzles in an anechoic jet facility at the University of Bristol. The measurements were carried out on an axial microphone array traversed in the radial direction and placed close to the jet. The tests were performed for several plate heights from the nozzle to investigate the effect of plate distance from the jet. The results are presented for sound pressure level and overall sound pressure level for several radial locations. Further analyses were carried out by decomposing the near-field
pressure into hydrodynamic and acoustic components. The investigation clearly shows the effect of
jet installation on the hydrodynamic and acoustic fields. Auto-correlation and cross-correlation analysis was also carried out for the near-field pressure fluctuations. The convective velocity of the flow is
reduced by the use of chevrons. The use of chevron nozzles changes the acoustic pressure in the nearfield region thereby shifting the dominant noise source towards the nozzle exit for both the installed
and isolated configurations.

Original language	English
Title of host publication	28th AIAA/CEAS Aeroacoustics Conference, 2022
Publisher	American Institute of Aeronautics and Astronautics Inc. (AIAA)
ISBN (Electronic)	9781624106644
ISBN (Print)	9781624106644
DOIs	https://doi.org/10.2514/6.2022-2907
Publication status	Published - 13 Jun 2022
Event	28th AIAA/CEAS Aeroacoustics 2022 Conference - United Kingdom, Southampton, United Kingdom Duration: 14 Jun 2022 → 17 Jun 2022 https://doi.org/10.2514/6.2022-3095

Publication series

Name	AIAA/CEAS Aeroacoustics Conference
Publisher	AIAA
ISSN (Print)	1946-7826

Conference

Conference	28th AIAA/CEAS Aeroacoustics 2022 Conference
Country/Territory	United Kingdom
City	Southampton
Period	14/06/22 → 17/06/22
Internet address	https://doi.org/10.2514/6.2022-3095

Bibliographical note

Funding Information:
The authors would like to acknowledge the Engineering and Physical Sciences Research Council (EPSRC) for supporting this research titled JINA: Jet Installation Noise Abatement (Grant No. EP/S000917/1).

Publisher Copyright:
© 2022, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

Keywords

jet noise
jet
aeroacoustics
Hydrodynamic
jet installation
wavelets

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title = "On Investigating the Hydrodynamic Field for Jets with and without Installation Effects",

abstract = "Near-field hydrodynamic and acoustic characteristics of an unheated subsonic jet with chevron nozzles were investigated experimentally with and without jet installation effects. Near-field pressure fluctuations were acquired for Mach numbers ranging from 0.3 to 0.9 for four different types of chevron nozzles in an anechoic jet facility at the University of Bristol. The measurements were carried out on an axial microphone array traversed in the radial direction and placed close to the jet. The tests were performed for several plate heights from the nozzle to investigate the effect of plate distance from the jet. The results are presented for sound pressure level and overall sound pressure level for several radial locations. Further analyses were carried out by decomposing the near-field pressure into hydrodynamic and acoustic components. The investigation clearly shows the effect of jet installation on the hydrodynamic and acoustic fields. Auto-correlation and cross-correlation analysis was also carried out for the near-field pressure fluctuations. The convective velocity of the flow is reduced by the use of chevrons. The use of chevron nozzles changes the acoustic pressure in the nearfield region thereby shifting the dominant noise source towards the nozzle exit for both the installed and isolated configurations. ",

keywords = "jet noise, jet, aeroacoustics, Hydrodynamic, jet installation, wavelets",

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

note = "Funding Information: The authors would like to acknowledge the Engineering and Physical Sciences Research Council (EPSRC) for supporting this research titled JINA: Jet Installation Noise Abatement (Grant No. EP/S000917/1). Publisher Copyright: {\textcopyright} 2022, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.; 28th AIAA/CEAS Aeroacoustics 2022 Conference ; Conference date: 14-06-2022 Through 17-06-2022",

year = "2022",

month = jun,

day = "13",

doi = "10.2514/6.2022-2907",

language = "English",

isbn = "9781624106644",

series = "AIAA/CEAS Aeroacoustics Conference",

publisher = "American Institute of Aeronautics and Astronautics Inc. (AIAA)",

booktitle = "28th AIAA/CEAS Aeroacoustics Conference, 2022",

address = "United States",

url = "https://doi.org/10.2514/6.2022-3095",

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Kamliya Jawahar, H & Azarpeyvand, M 2022, On Investigating the Hydrodynamic Field for Jets with and without Installation Effects. in 28th AIAA/CEAS Aeroacoustics Conference, 2022., AIAA 2022-2907, AIAA/CEAS Aeroacoustics Conference, American Institute of Aeronautics and Astronautics Inc. (AIAA), 28th AIAA/CEAS Aeroacoustics 2022 Conference, Southampton, United Kingdom, 14/06/22. https://doi.org/10.2514/6.2022-2907

On Investigating the Hydrodynamic Field for Jets with and without Installation Effects. / Kamliya Jawahar, Hasan ; Azarpeyvand, Mahdi.
28th AIAA/CEAS Aeroacoustics Conference, 2022. American Institute of Aeronautics and Astronautics Inc. (AIAA), 2022. AIAA 2022-2907 (AIAA/CEAS Aeroacoustics Conference).

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

TY - GEN

T1 - On Investigating the Hydrodynamic Field for Jets with and without Installation Effects

AU - Kamliya Jawahar, Hasan

AU - Azarpeyvand, Mahdi

N1 - Funding Information: The authors would like to acknowledge the Engineering and Physical Sciences Research Council (EPSRC) for supporting this research titled JINA: Jet Installation Noise Abatement (Grant No. EP/S000917/1). Publisher Copyright: © 2022, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

PY - 2022/6/13

Y1 - 2022/6/13

N2 - Near-field hydrodynamic and acoustic characteristics of an unheated subsonic jet with chevron nozzles were investigated experimentally with and without jet installation effects. Near-field pressure fluctuations were acquired for Mach numbers ranging from 0.3 to 0.9 for four different types of chevron nozzles in an anechoic jet facility at the University of Bristol. The measurements were carried out on an axial microphone array traversed in the radial direction and placed close to the jet. The tests were performed for several plate heights from the nozzle to investigate the effect of plate distance from the jet. The results are presented for sound pressure level and overall sound pressure level for several radial locations. Further analyses were carried out by decomposing the near-field pressure into hydrodynamic and acoustic components. The investigation clearly shows the effect of jet installation on the hydrodynamic and acoustic fields. Auto-correlation and cross-correlation analysis was also carried out for the near-field pressure fluctuations. The convective velocity of the flow is reduced by the use of chevrons. The use of chevron nozzles changes the acoustic pressure in the nearfield region thereby shifting the dominant noise source towards the nozzle exit for both the installed and isolated configurations.

AB - Near-field hydrodynamic and acoustic characteristics of an unheated subsonic jet with chevron nozzles were investigated experimentally with and without jet installation effects. Near-field pressure fluctuations were acquired for Mach numbers ranging from 0.3 to 0.9 for four different types of chevron nozzles in an anechoic jet facility at the University of Bristol. The measurements were carried out on an axial microphone array traversed in the radial direction and placed close to the jet. The tests were performed for several plate heights from the nozzle to investigate the effect of plate distance from the jet. The results are presented for sound pressure level and overall sound pressure level for several radial locations. Further analyses were carried out by decomposing the near-field pressure into hydrodynamic and acoustic components. The investigation clearly shows the effect of jet installation on the hydrodynamic and acoustic fields. Auto-correlation and cross-correlation analysis was also carried out for the near-field pressure fluctuations. The convective velocity of the flow is reduced by the use of chevrons. The use of chevron nozzles changes the acoustic pressure in the nearfield region thereby shifting the dominant noise source towards the nozzle exit for both the installed and isolated configurations.

KW - jet noise

KW - jet

KW - aeroacoustics

KW - Hydrodynamic

KW - jet installation

KW - wavelets

U2 - 10.2514/6.2022-2907

DO - 10.2514/6.2022-2907

M3 - Conference Contribution (Conference Proceeding)

SN - 9781624106644

T3 - AIAA/CEAS Aeroacoustics Conference

BT - 28th AIAA/CEAS Aeroacoustics Conference, 2022

PB - American Institute of Aeronautics and Astronautics Inc. (AIAA)

T2 - 28th AIAA/CEAS Aeroacoustics 2022 Conference

Y2 - 14 June 2022 through 17 June 2022

ER -

On Investigating the Hydrodynamic Field for Jets with and without Installation Effects

Abstract

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Bibliographical note

Keywords

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