Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Computational Aeroacoustics of a Separate Flow Exhaust System with Eccentric Inner Nozzle
Aerospace Systems, University of Cincinnati.ORCID iD: 0000-0001-7330-6965
Aerospace Engineering, University of Cincinnati.
Energy Sciences, Lund University.
Energy Sciences, Lund University.
Show others and affiliations
2007 (English)In: 45th AIAA Aerospace Sciences Meeting 2007, 2007, 28-39 p.Conference paper, Published paper (Refereed)
Abstract [en]

A major issue related to our modern way of life is the noise caused by jet engine powered airliners. Methods to reduce the jet noise were proposed in the last decades starting with the introduction of high bypass turbofan engines. A numerical investigation of flow and acoustics of a separate flow exhaust system is performed in the present paper. The goal is to investigate how the noise generated by a separate flow jet engine exhaust is influenced if the symmetry of the jet exhaust geometry is broken by having the inner nozzle and the center body off the center line axis of the fan nozzle. A decomposition of flow variables is used that allows separation of flow and acoustic computations. Large Eddy Simulation approach is employed to compute the flow field and the acoustic sources. The inhomogeneous wave equation is used to compute the acoustic near- and far-fields. Using this method, previous numerical studies of the symmetric (baseline) configuration showed good agreement between the computed data and the experimental results. Comparisons between the near- and far-field baseline concentric case and the computations obtained using the eccentric configuration are performed showing an acoustic benefit for the offset case.

Place, publisher, year, edition, pages
2007. 28-39 p.
Keyword [en]
Jet Noise Supression, Off-set nozzles, Large Eddy Simulation, Acoustic Analogy
National Category
Fluid Mechanics and Acoustics Aerospace Engineering
Identifiers
URN: urn:nbn:se:kth:diva-48017ISBN: 13: 978-1-56347-890-1 (print)OAI: oai:DiVA.org:kth-48017DiVA: diva2:456615
Conference
45th AIAA Aerospace Sciences Meeting 2007. Reno, NV. 8 January 2007 - 11 January 2007
Note
QC 20111117. AIAA 2007-13Available from: 2011-11-15 Created: 2011-11-15 Last updated: 2011-11-17Bibliographically approved

Open Access in DiVA

No full text

Authority records BETA

Mihaescu, Mihai

Search in DiVA

By author/editor
Mihaescu, Mihai
Fluid Mechanics and AcousticsAerospace Engineering

Search outside of DiVA

GoogleGoogle Scholar

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 31 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf