On the Effect of Flexibility for In-Duct Plates with Focus on Aeroacoustics

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dc.contributor.authorJansson, Magdalena
dc.contributor.authorÅblad, Märta
dc.contributor.departmentChalmers tekniska högskola / Institutionen för tillämpad mekaniksv
dc.contributor.departmentChalmers University of Technology / Department of Applied Mechanicsen
dc.date.accessioned2019-07-03T13:55:16Z
dc.date.available2019-07-03T13:55:16Z
dc.date.issued2016
dc.description.abstractThe flow of air around an angled steel plate in a duct generates noise. Previous experimental studies show that the noise is reduced if the plate is allowed to be flexible, however the underlying mechanisms are not fully understood. Therefore it is desirable to find an accurate and affordable numerical solution to the problem. In this thesis, the stiff and the flexible plate are simulated using the commercial CFD software Star CCM+. Sound generation is then estimated by applying a dipole approximation of Curle’s acoustic analogy. The results show that the velocity field and sound generation can be accurately predicted for the stiff plate and that the Star CCM+ FSI solver accurately predicts the plate motion. However, the sound reduction for the flexible plate is not captured. The reason for the discrepancies between simulation and experiments in terms of sound generation are unclear, however the motion of the plate is believed to make the dipole sound approximation an unsuitable approach.
dc.identifier.urihttps://hdl.handle.net/20.500.12380/238187
dc.language.isoeng
dc.relation.ispartofseriesDiploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden : 2016:14
dc.setspec.uppsokTechnology
dc.subjectTransport
dc.subjectHållbar utveckling
dc.subjectStrömningsmekanik och akustik
dc.subjectTransport
dc.subjectSustainable Development
dc.subjectFluid Mechanics and Acoustics
dc.titleOn the Effect of Flexibility for In-Duct Plates with Focus on Aeroacoustics
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster Thesisen
dc.type.uppsokH
local.programmeApplied mechanics (MPAME), MSc
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