Modeling fan broadband noise from jet engines and rod-airfoil benchmark case for broadband noise prediction

dc.contributor.advisor Anupam Sharma
dc.contributor.author Agrawal, Bharat
dc.contributor.department Aerospace Engineering
dc.date 2018-08-11T14:24:18.000
dc.date.accessioned 2020-06-30T02:55:56Z
dc.date.available 2020-06-30T02:55:56Z
dc.date.copyright Thu Jan 01 00:00:00 UTC 2015
dc.date.embargo 2001-01-01
dc.date.issued 2015-01-01
dc.description.abstract <p>This work has two primary parts: (1) an exhaustive literature review highlighting the need and the direction to study broadband noise generation from the fan stage of a modern high bypass ratio turbofan engine, and (2) a benchmark study of noise generation by the flow over a rod and an airfoil in tandem arrangement. The literature review highlights that not all the experimental data has been consistently explained with the theory and thus these gaps are required to be filled in to improve the fan noise prediction during the design phases. The benchmark case provides flow conditions where the upstream located circular rod sheds periodic vortices and creates turbulence which interacts with downstream located symmetric airfoil at zero angle of attack. This interaction produces noise which radiates to farfield. The periodic shedding and the resulting turbulence provides energy to the tonal and broadband components of the total noise. This test case is used to validate a new approach to predict noise in farfield which uses incompressible flow solver, pimpleFoam (part of OpenFOAM), along with Amiet's theory.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/etd/14326/
dc.identifier.articleid 5333
dc.identifier.contextkey 7896961
dc.identifier.doi https://doi.org/10.31274/etd-180810-3880
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath etd/14326
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/28511
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/etd/14326/Agrawal_iastate_0097M_14890.pdf|||Fri Jan 14 20:18:29 UTC 2022
dc.subject.disciplines Aerospace Engineering
dc.subject.keywords Aerospace Engineering
dc.subject.keywords Amiet's theory
dc.subject.keywords computational aeroacoustics
dc.subject.keywords fan broadband noise
dc.subject.keywords openfoam
dc.subject.keywords rod-airfoil noise
dc.title Modeling fan broadband noise from jet engines and rod-airfoil benchmark case for broadband noise prediction
dc.type article
dc.type.genre thesis
dspace.entity.type Publication
relation.isOrgUnitOfPublication 047b23ca-7bd7-4194-b084-c4181d33d95d
thesis.degree.level thesis
thesis.degree.name Master of Science
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