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One-sided multi-port techniques for characterisation of in-duct samples with nonlinear acoustic properties
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Flow acoustics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-8474-8563
2012 (English)In: Journal of Sound and Vibration, ISSN 0022-460X, E-ISSN 1095-8568, Vol. 331, no 13, 3050-3067 p.Article in journal (Refereed) Published
Abstract [en]

Single sided multi-port system identification techniques, using sinusoidal excitation, for studying nonlinear energy transfer to higher harmonics for samples only accessible from one side such as perforated liners used as wall treatment in aircraft engine ducts are presented. The starting point is the so called polyharmonic distortion theory used for studying microwave systems. Models of different level of complexity are developed and the system identification results are compared. Experimental results, including error analysis, for a perforate sample are presented. The use of these techniques for analysing nonlinear energy transfer to higher harmonics and to improve the understanding of the physical phenomena involved are illustrated.

Place, publisher, year, edition, pages
2012. Vol. 331, no 13, 3050-3067 p.
Keyword [en]
Acoustic properties, Aircraft engines, Error analysis
National Category
Fluid Mechanics and Acoustics
URN: urn:nbn:se:kth:diva-95225DOI: 10.1016/j.jsv.2012.02.013ISI: 000303269200006ScopusID: 2-s2.0-84859159322OAI: diva2:527739
TrenOp, Transport Research Environment with Novel Perspectives

QC 20120522

Available from: 2012-05-22 Created: 2012-05-21 Last updated: 2013-04-10Bibliographically approved

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Bodén, Hans
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