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On extraction of IC-engine linear acoustic source data from non-linear simulations
KTH, Superseded Departments, Vehicle Engineering.ORCID iD: 0000-0002-8474-8563
AVL.
AVL.
2004 (English)In: ICSV12-St Petersburg, 2004Conference paper, Published paper (Other academic)
Abstract [en]

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. These tests are time consuming and expensive. It would therefore be of interest to extract the acoustic source data from existing 1-D CFD codes describing the engine gas exchange process. In this paper a comparison is made between results obtained applying the two-load technique to measurements on a truck Diesel engine and to 1-D CFD simulations of the same engine. The results show that it is possible to obtain reasonably accurate source data estimates from the simulations.

Place, publisher, year, edition, pages
2004.
Keyword [en]
acoustic source, two-load method, one–port, source model, source impedance, source strength, IC-engine, 1-D CFD
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-62251OAI: oai:DiVA.org:kth-62251DiVA: diva2:480036
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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