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Modelling perforates in mufflers using two-ports
Sound and Vibration Lab., Faculty of Engineering, Ain Shams University.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL.ORCID iD: 0000-0001-7898-8643
2005 (English)In: 12th International Congress on Sound and Vibration 2005: ICSV 2005, 2005, 2294-2301 p.Conference paper (Refereed)
Abstract [en]

One of the main sources of noise of a vehicle is the engine where its noise is usually damped by means of acoustic mufflers. A very common problem in the modeling of automotive mufflers is that of two flow ducts coupled through a perforate. A new segmentation approach is developed here based on two-port analysis techniques, in order to model perforated pipes using general two-port codes which are widely available. Examples are given for simple muffler configurations and the convergence of the technique is investigated based on the number of segments used. The results are compared with closed form solutions form the literature. Finally, an analysis of a complicated multi-chamber perforated muffler system is presented. The two-port simulation results show good agreement with both the measurements, and the simulations using the classical four-port elements.

Place, publisher, year, edition, pages
2005. 2294-2301 p.
, 12th International Congress on Sound and Vibration 2005, Vol. 3
National Category
Fluid Mechanics and Acoustics
URN: urn:nbn:se:kth:diva-148564ScopusID: 2-s2.0-84881598723ISBN: 978-162748149-6OAI: diva2:736991
12th International Congress on Sound and Vibration 2005, ICSV 2005; Lisbon, Portugal, 11-14 July, 2005

QC 20140811

Available from: 2014-08-11 Created: 2014-08-08 Last updated: 2014-08-11Bibliographically approved

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Elnady, TamerÅbom, Mats
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