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High fidelity simulation of turbulent jet and identification of acoustic sources

High fidelity simulation of turbulent jet and identification of acoustic sources
High fidelity simulation of turbulent jet and identification of acoustic sources
A turbulent round jet at the Reynolds number of 7,290 is simulated by direct numerical simulation to study jet noise source and its propagation. A large domain of 60 diameters in the axial direction, 30 diameters in the radial direction, and full 360 degrees is chosen to minimize the effect of boundary conditions. The spatial statistics of the simulated flow and the peak amplitude of acoustic radiation at 45-degree angle agree well with existing literature, confirming the quality of the data. Motivated by the Ffowcs-Williams and Hawkings equation, acoustic spectra at three representative locations of the potential core, the shear layer, and the ambient indicate that the fluctuation magnitudes are highest in the shear layer, followed by the potential core and the ambient. The turbulent characteristics are isotropic in the potential core and the shear layer, and the ambient exhibits an intermittent behaviour.
jet noise, turbulent jet, self-similarity, Ffowcs-Williams and Hawkings Equation
1674-9804
1-9
Shin, Dong-Hyuk
aefc1292-87fd-48ab-94bc-a857692ccabe
Aparece-Scutariu, Vlad
c5219ec5-ad4f-4a5b-bef7-ec5b7e4ebd0b
Richardson, Edward
a8357516-e871-40d8-8a53-de7847aa2d08
Shin, Dong-Hyuk
aefc1292-87fd-48ab-94bc-a857692ccabe
Aparece-Scutariu, Vlad
c5219ec5-ad4f-4a5b-bef7-ec5b7e4ebd0b
Richardson, Edward
a8357516-e871-40d8-8a53-de7847aa2d08

Shin, Dong-Hyuk, Aparece-Scutariu, Vlad and Richardson, Edward (2017) High fidelity simulation of turbulent jet and identification of acoustic sources. Civil Aircraft Design & Research, 2017 (3), 1-9. (doi:10.19416/j.cnki.1674-9804.2017.03.001).

Record type: Article

Abstract

A turbulent round jet at the Reynolds number of 7,290 is simulated by direct numerical simulation to study jet noise source and its propagation. A large domain of 60 diameters in the axial direction, 30 diameters in the radial direction, and full 360 degrees is chosen to minimize the effect of boundary conditions. The spatial statistics of the simulated flow and the peak amplitude of acoustic radiation at 45-degree angle agree well with existing literature, confirming the quality of the data. Motivated by the Ffowcs-Williams and Hawkings equation, acoustic spectra at three representative locations of the potential core, the shear layer, and the ambient indicate that the fluctuation magnitudes are highest in the shear layer, followed by the potential core and the ambient. The turbulent characteristics are isotropic in the potential core and the shear layer, and the ambient exhibits an intermittent behaviour.

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More information

Published date: 1 August 2017
Keywords: jet noise, turbulent jet, self-similarity, Ffowcs-Williams and Hawkings Equation

Identifiers

Local EPrints ID: 415283
URI: http://eprints.soton.ac.uk/id/eprint/415283
ISSN: 1674-9804
PURE UUID: b4e0c9a4-e797-47c2-b84c-7d23c37984c5
ORCID for Edward Richardson: ORCID iD orcid.org/0000-0002-7631-0377

Catalogue record

Date deposited: 06 Nov 2017 17:30
Last modified: 16 Mar 2024 04:05

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Contributors

Author: Dong-Hyuk Shin
Author: Vlad Aparece-Scutariu

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