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APPLICATION OF LINEAR ACOUSTIC SOURCE DATA MEASUREMENT TECHNIQUES FOR TRUCK DIESEL ENGINES
KTH, Superseded Departments, Vehicle Engineering.ORCID iD: 0000-0002-8474-8563
2004 (English)In: ICSV12-St Petersburg, 2004Conference paper, Published paper (Other academic)
Abstract [en]

IC-engines are known from previous studies to be non-linear sources of exhaust system noise. Never the less linear frequency domain prediction codes are used for calculation of low frequency sound transmission in and sound radiation from IC-engine exhaust systems. To calculate insertion loss of mufflers or the level of radiated sound information about the engine as an acoustic source is needed. The source model used in the low frequency plane wave range is the linear time invariant 1-port model. The acoustic source data is usually obtained from experimental tests where multi-load methods and especially the two-load method are most commonly used. In this paper results from experiments on truck Diesel engines are presented. A number of different techniques for extracting source data are tested and the linearity and time invariance is investigated. The results show that a linear time-invariant model can provide good results.

Place, publisher, year, edition, pages
2004.
Keyword [en]
acoustic source, two-load method, one–port, source model, source impedance, source strength, IC-engine, measurements
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-62252OAI: oai:DiVA.org:kth-62252DiVA: diva2:480037
Conference
ICSV12, The Thirteenth International Congress on Sound and Vibration, Vienna , Austria, July 2-6, 2006
Note
QC 20120308Available from: 2012-01-18 Created: 2012-01-18 Last updated: 2012-03-08Bibliographically approved

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Bodén, Hans

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