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Direct computation and aeroacoustic modelling of a subsonic axisymmetric jet

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Direct computation and aeroacoustic modelling of a subsonic axisymmetric jet. / Jiang, Xi; Avital, E J ; Luo, K H .

In: Journal of Sound and Vibration, Vol. 270, No. 3, 23.02.2004, p. 525-538.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Jiang, X, Avital, EJ & Luo, KH 2004, 'Direct computation and aeroacoustic modelling of a subsonic axisymmetric jet', Journal of Sound and Vibration, vol. 270, no. 3, pp. 525-538. https://doi.org/10.1016/j.jsv.2003.09.045

APA

Jiang, X., Avital, E. J., & Luo, K. H. (2004). Direct computation and aeroacoustic modelling of a subsonic axisymmetric jet. Journal of Sound and Vibration, 270(3), 525-538. https://doi.org/10.1016/j.jsv.2003.09.045

Vancouver

Jiang X, Avital EJ, Luo KH. Direct computation and aeroacoustic modelling of a subsonic axisymmetric jet. Journal of Sound and Vibration. 2004 Feb 23;270(3):525-538. https://doi.org/10.1016/j.jsv.2003.09.045

Author

Jiang, Xi ; Avital, E J ; Luo, K H . / Direct computation and aeroacoustic modelling of a subsonic axisymmetric jet. In: Journal of Sound and Vibration. 2004 ; Vol. 270, No. 3. pp. 525-538.

Bibtex

@article{a4cfd4536e9442f6ba3c15980a145219,
title = "Direct computation and aeroacoustic modelling of a subsonic axisymmetric jet",
abstract = "A numerical algorithm for acoustic noise predictions based on solving Lilley's third order wave equation in the time-space domain is developed for a subsonic axisymmetric jet. The sound field is simulated simultaneously with the source field calculation, which is based on a direct solution of the compressible Navier-Stokes equations. The computational domain includes both the nearfield and a portion of the acoustic farfield. In the simulation, the detailed sound source structure is provided by the nearfield direct numerical simulation (DNS), while the sound field is obtained from both the DNS and the numerical solution to the non-linear Lilley's equation. The source terms of Lilley's equation are used to identify the apparent sound source locations in the idealized axisymmetric low-Reynolds number jet. The sound field is mainly discussed in terms of instantaneous pressure fluctuations, frequency spectra, acoustic intensity and directivity. A good agreement is found between the predictions from the axisymmetric Lilley's equation and the DNS results for the sound field. Limitations and perspectives of the simulation are also discussed. ",
keywords = "MACH WAVE RADIATION, BOUNDARY-CONDITIONS, SOUND GENERATION, TURBULENCE, NOISE, SCHEMES, LAYER, FIELD, FLOW",
author = "Xi Jiang and Avital, {E J} and Luo, {K H}",
year = "2004",
month = feb,
day = "23",
doi = "10.1016/j.jsv.2003.09.045",
language = "English",
volume = "270",
pages = "525--538",
journal = "Journal of Sound and Vibration",
issn = "0022-460X",
publisher = "Academic Press Inc.",
number = "3",

}

RIS

TY - JOUR

T1 - Direct computation and aeroacoustic modelling of a subsonic axisymmetric jet

AU - Jiang, Xi

AU - Avital, E J

AU - Luo, K H

PY - 2004/2/23

Y1 - 2004/2/23

N2 - A numerical algorithm for acoustic noise predictions based on solving Lilley's third order wave equation in the time-space domain is developed for a subsonic axisymmetric jet. The sound field is simulated simultaneously with the source field calculation, which is based on a direct solution of the compressible Navier-Stokes equations. The computational domain includes both the nearfield and a portion of the acoustic farfield. In the simulation, the detailed sound source structure is provided by the nearfield direct numerical simulation (DNS), while the sound field is obtained from both the DNS and the numerical solution to the non-linear Lilley's equation. The source terms of Lilley's equation are used to identify the apparent sound source locations in the idealized axisymmetric low-Reynolds number jet. The sound field is mainly discussed in terms of instantaneous pressure fluctuations, frequency spectra, acoustic intensity and directivity. A good agreement is found between the predictions from the axisymmetric Lilley's equation and the DNS results for the sound field. Limitations and perspectives of the simulation are also discussed. 

AB - A numerical algorithm for acoustic noise predictions based on solving Lilley's third order wave equation in the time-space domain is developed for a subsonic axisymmetric jet. The sound field is simulated simultaneously with the source field calculation, which is based on a direct solution of the compressible Navier-Stokes equations. The computational domain includes both the nearfield and a portion of the acoustic farfield. In the simulation, the detailed sound source structure is provided by the nearfield direct numerical simulation (DNS), while the sound field is obtained from both the DNS and the numerical solution to the non-linear Lilley's equation. The source terms of Lilley's equation are used to identify the apparent sound source locations in the idealized axisymmetric low-Reynolds number jet. The sound field is mainly discussed in terms of instantaneous pressure fluctuations, frequency spectra, acoustic intensity and directivity. A good agreement is found between the predictions from the axisymmetric Lilley's equation and the DNS results for the sound field. Limitations and perspectives of the simulation are also discussed. 

KW - MACH WAVE RADIATION

KW - BOUNDARY-CONDITIONS

KW - SOUND GENERATION

KW - TURBULENCE

KW - NOISE

KW - SCHEMES

KW - LAYER

KW - FIELD

KW - FLOW

U2 - 10.1016/j.jsv.2003.09.045

DO - 10.1016/j.jsv.2003.09.045

M3 - Journal article

VL - 270

SP - 525

EP - 538

JO - Journal of Sound and Vibration

JF - Journal of Sound and Vibration

SN - 0022-460X

IS - 3

ER -