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Modeling of the acoustical field due to a jet engine with ground effect

Mihaescu, Mihai LU ; Szász, Robert-Zoltán LU and Fuchs, Laszlo LU (2003) Proceedings of the Tenth International Congress on Sound and Vibration In Proceedings of the Tenth International Congress on Sound and Vibration p.677-684
Abstract
The principal noise source for a jet engine is associated with the jet exhaust. The acoustical field that is generated by a jet engine before the take-off is considered. The turbulent jet and the mixing of the hot exhaust gas with the cold surrounding air forms an acoustical source. The compressible Navier-Stokes equations describe both flow field as well as sound generation. The acoustic theory uses the hypothesis that a part of the flow field (which is the source of the acoustic field) is distinct from the properties of the ambient flow field. Thus, the velocity vector, the pressure and the density are split into semi-compressible components and inviscid, irrotational acoustical components. The turbulent flow and mixing are computed by... (More)
The principal noise source for a jet engine is associated with the jet exhaust. The acoustical field that is generated by a jet engine before the take-off is considered. The turbulent jet and the mixing of the hot exhaust gas with the cold surrounding air forms an acoustical source. The compressible Navier-Stokes equations describe both flow field as well as sound generation. The acoustic theory uses the hypothesis that a part of the flow field (which is the source of the acoustic field) is distinct from the properties of the ambient flow field. Thus, the velocity vector, the pressure and the density are split into semi-compressible components and inviscid, irrotational acoustical components. The turbulent flow and mixing are computed by using Large Eddy Simulation (LES). The instantaneous LES provide the acoustical source for the Lighthill's wave equation, which is used to compute the acoustical field. The computed acoustical field agrees quite well with published experimental data. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Sound radiation, Lighthill's wave equations, Turbulent jets, Large Eddy Simulation (LES)
in
Proceedings of the Tenth International Congress on Sound and Vibration
pages
677 - 684
publisher
Institute of Acoustics
conference name
Proceedings of the Tenth International Congress on Sound and Vibration
external identifiers
  • scopus:2342428079
language
English
LU publication?
yes
id
54571089-730e-40e0-accc-44e4465c0ff9 (old id 612244)
date added to LUP
2007-11-30 14:24:32
date last changed
2017-01-01 08:07:17
@inproceedings{54571089-730e-40e0-accc-44e4465c0ff9,
  abstract     = {The principal noise source for a jet engine is associated with the jet exhaust. The acoustical field that is generated by a jet engine before the take-off is considered. The turbulent jet and the mixing of the hot exhaust gas with the cold surrounding air forms an acoustical source. The compressible Navier-Stokes equations describe both flow field as well as sound generation. The acoustic theory uses the hypothesis that a part of the flow field (which is the source of the acoustic field) is distinct from the properties of the ambient flow field. Thus, the velocity vector, the pressure and the density are split into semi-compressible components and inviscid, irrotational acoustical components. The turbulent flow and mixing are computed by using Large Eddy Simulation (LES). The instantaneous LES provide the acoustical source for the Lighthill's wave equation, which is used to compute the acoustical field. The computed acoustical field agrees quite well with published experimental data.},
  author       = {Mihaescu, Mihai and Szász, Robert-Zoltán and Fuchs, Laszlo},
  booktitle    = {Proceedings of the Tenth International Congress on Sound and Vibration},
  keyword      = {Sound radiation,Lighthill's wave equations,Turbulent jets,Large Eddy Simulation (LES)},
  language     = {eng},
  pages        = {677--684},
  publisher    = {Institute of Acoustics},
  title        = {Modeling of the acoustical field due to a jet engine with ground effect},
  year         = {2003},
}