Optimal design of a segmented tube with side branches for noise reduction

Ashok D. Belegundu, Michael D. Grissom

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Acoustic filters, or mufflers, are used in a number of applications for suppression or attenuation of sound. These mufflers use pipes with side branches and/or Helmholtz resonators thus routing the flow through a number of passages wherein the waves are partially reflected resulting in sound power attenuation. With the idea of using a pipe for active noise cancellation to reduce cabin noise in propeller aircraft, we define an objective function that maximizes sound pressure (or other criteria) at a given frequency f0 while minimizing (attenuating) the pressure at other harmonics m1 f0, m2 f0 etc. within the frequency band. Thus, the device can be used to generate anti-noise at the first harmonic, while attenuating noise at higher harmonics. A design tool is developed here using an optimization technique. Plane wave propagation is assumed. A choice of objective functions can be user-specified. Details of the design parameters and objective functions are given followed by acoustic analysis details. Test results are then given which show that the code can be used as a valuable design tool for noise reduction.

Original languageEnglish (US)
Title of host publicationDynamics, Vibration, and Control
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791852040
DOIs
Publication statusPublished - Jan 1 2018
EventASME 2018 International Mechanical Engineering Congress and Exposition, IMECE 2018 - Pittsburgh, United States
Duration: Nov 9 2018Nov 15 2018

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Volume4B-2018

Other

OtherASME 2018 International Mechanical Engineering Congress and Exposition, IMECE 2018
CountryUnited States
CityPittsburgh
Period11/9/1811/15/18

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All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

Cite this

Belegundu, A. D., & Grissom, M. D. (2018). Optimal design of a segmented tube with side branches for noise reduction. In Dynamics, Vibration, and Control (ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE); Vol. 4B-2018). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/IMECE2018-88691