Analytical Prediction of Transmission Loss in Distorted Circular Chamber Mufflers With Extended Inlet/Outlet Ports by Using a Regular Perturbation Method

Subhabrata Banerjee, Anthony M. Jacobi

Research output: Contribution to journalArticlepeer-review

Abstract

The sound attenuation performance in elliptic chamber mufflers with extended inlet and outlet ports is investigated in the present work. Unlike cylindrical geometries, the ellipticity of the chamber prevents development of analytical solutions in terms of the elliptic eigenfunctions. In order to overcome this geometric limitation, a perturbation-based approach is adopted through this work. For moderate chamber eccentricities, transmission loss (TL) curves derived through the perturbed eigensolutions are observed to compare well with numerical simulations. The effects of higher-order propagating modes on the TL curves, which otherwise are nonpropagating for the corresponding cylindrical chamber extended muffler are discussed. Parametric studies on different tuned duct extensions are presented to show broadband sound attenuation.

Original languageEnglish (US)
Article number061002
JournalJournal of Vibration, Acoustics, Stress, and Reliability in Design
Volume137
Issue number6
DOIs
StatePublished - Dec 1 2015

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Acoustics and Ultrasonics

Fingerprint

Dive into the research topics of 'Analytical Prediction of Transmission Loss in Distorted Circular Chamber Mufflers With Extended Inlet/Outlet Ports by Using a Regular Perturbation Method'. Together they form a unique fingerprint.

Cite this