Parametric study of helmholtz resonator performance and effect of poroacoustic material use in resonator design

dc.contributor.advisor Atul Kelkar
dc.contributor.author Esandiari, Yasaman
dc.contributor.department Mechanical Engineering
dc.date 2018-08-11T05:22:24.000
dc.date.accessioned 2020-06-30T03:08:52Z
dc.date.available 2020-06-30T03:08:52Z
dc.date.copyright Sun Jan 01 00:00:00 UTC 2017
dc.date.embargo 2001-01-01
dc.date.issued 2017-01-01
dc.description.abstract <p>Circular concentric Helmholtz Resonators have been extensively studied in various industries whereas Helmholtz resonators with normal incident configuration have not been theoretically, numerically or experimentally analyzed in sufficient depth. These resonators can offer useful acoustic design options when there are several constraints to be considered for example, space limitations, design specifications, materials available etc. For sound insulation on flat surfaces such as windows, Helmholtz Resonators (HRs) need to be normal to the sound pressure waves. This configuration is not extensively addressed in the literature. In this study, the effect of various design parameters such as neck radius, neck length, cavity radius and cavity length on sound transmission loss of HRs has been numerically analyzed and the results are discussed. This study also examines the effect of combining HRs in series and parallel network. Moreover, the effect of adding porous material lining is also explored using three different analysis modules of COMSOL, namely, pressure acoustics, solid mechanics, and poroelastic waves modules. Additionally, a theoretical one-dimensional model for side branch HRs is used to verify the numerical simulation, and the best design is introduced based on the results. Finally, the effect of structural vibrations on sound propagation properties of the system is analyzed and the results are discussed.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/etd/16124/
dc.identifier.articleid 7131
dc.identifier.contextkey 11456922
dc.identifier.doi https://doi.org/10.31274/etd-180810-5753
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath etd/16124
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/30307
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/etd/16124/Esandiari_iastate_0097M_16977.pdf|||Fri Jan 14 20:55:32 UTC 2022
dc.subject.disciplines Mechanical Engineering
dc.subject.keywords Acoustic- Structure Interaction
dc.subject.keywords Helmholtz Resonators
dc.subject.keywords Parametric Study
dc.title Parametric study of helmholtz resonator performance and effect of poroacoustic material use in resonator design
dc.type article
dc.type.genre thesis
dspace.entity.type Publication
relation.isOrgUnitOfPublication 6d38ab0f-8cc2-4ad3-90b1-67a60c5a6f59
thesis.degree.discipline Mechanical Engineering
thesis.degree.level thesis
thesis.degree.name Master of Science
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