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Noise computation of a turbo-engine jet exhaust based on LES and lighthill's acoustic analogy

Mihaescu, Mihai LU ; Szász, Robert-Zoltán LU and Fuchs, Laszlo LU (2004) 2004 ASME Turbo Expo In Proceedings of the ASME Turbo Expo 2004 5 B. p.1723-1731
Abstract
Increasing noise regulations at urban airports force jet engine manufactures to develop and build more quiet engines. Over recent years, a significant reduction in fan and mechanical noise has been achieved. However, the jet exhaust is the principal source of noise. The acoustical field that is generated by a turboengine jet exhaust running near the ground level is considered. The full equations of motion for compressible and unsteady flows describe both flow field and sound generation. The flow variables are decomposed into semi-compressible components and inviscid, irrotational acoustical components. The turbulent flow and mixing are computed using Large Eddy Simulation (LES). The radiated acoustical field is computed using the... (More)
Increasing noise regulations at urban airports force jet engine manufactures to develop and build more quiet engines. Over recent years, a significant reduction in fan and mechanical noise has been achieved. However, the jet exhaust is the principal source of noise. The acoustical field that is generated by a turboengine jet exhaust running near the ground level is considered. The full equations of motion for compressible and unsteady flows describe both flow field and sound generation. The flow variables are decomposed into semi-compressible components and inviscid, irrotational acoustical components. The turbulent flow and mixing are computed using Large Eddy Simulation (LES). The radiated acoustical field is computed using the Lighthill's acoustic analogy with acoustic sources provided by instantaneous LES data. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Semi-compressible components, Acoustic source, Noise computation, Jet exhaust
in
Proceedings of the ASME Turbo Expo 2004
volume
5 B
pages
1723 - 1731
publisher
American Society Of Mechanical Engineers (ASME)
conference name
2004 ASME Turbo Expo
language
English
LU publication?
yes
id
6409f01a-2711-437a-9997-80ca4de554a7 (old id 613503)
date added to LUP
2007-11-29 13:54:22
date last changed
2016-04-16 09:55:54
@misc{6409f01a-2711-437a-9997-80ca4de554a7,
  abstract     = {Increasing noise regulations at urban airports force jet engine manufactures to develop and build more quiet engines. Over recent years, a significant reduction in fan and mechanical noise has been achieved. However, the jet exhaust is the principal source of noise. The acoustical field that is generated by a turboengine jet exhaust running near the ground level is considered. The full equations of motion for compressible and unsteady flows describe both flow field and sound generation. The flow variables are decomposed into semi-compressible components and inviscid, irrotational acoustical components. The turbulent flow and mixing are computed using Large Eddy Simulation (LES). The radiated acoustical field is computed using the Lighthill's acoustic analogy with acoustic sources provided by instantaneous LES data.},
  author       = {Mihaescu, Mihai and Szász, Robert-Zoltán and Fuchs, Laszlo},
  keyword      = {Semi-compressible components,Acoustic source,Noise computation,Jet exhaust},
  language     = {eng},
  pages        = {1723--1731},
  publisher    = {ARRAY(0xac72100)},
  series       = {Proceedings of the ASME Turbo Expo 2004},
  title        = {Noise computation of a turbo-engine jet exhaust based on LES and lighthill's acoustic analogy},
  volume       = {5 B},
  year         = {2004},
}