Effect of passive porous surface on the trailing-edge noise
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Bae, Youngmin | - |
dc.contributor.author | Moon, Young J. | - |
dc.date.accessioned | 2021-09-07T05:46:04Z | - |
dc.date.available | 2021-09-07T05:46:04Z | - |
dc.date.created | 2021-06-19 | - |
dc.date.issued | 2011-12 | - |
dc.identifier.issn | 1070-6631 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/111076 | - |
dc.description.abstract | This study numerically investigates the effect of porous surfaces on the turbulent noise generated by a blunt trailing-edge of a flat plate. The three-dimensional turbulent flow over the flat plate (Re-c = 1.3 x 10(5) and M = 0.06) is computed by incompressible large eddy simulation (LES) based on the volume-averaged Navier-Stokes equations, while the acoustic field is calculated by the linearized perturbed compressible equations (LPCEs) coupled with LES. The porous surface is applied to a small, selected area near the trailing-edge where vortex shedding and edge-scattering of convecting eddies generate dipole noise. The computed results show that the trailing-edge with porosity epsilon=0.25 and permeability (normalized) K* = 0.01 yields a reduction of the tonal peak by 13 dB for the zero angle of attack (alpha = 0 degrees) case, via breaking not only in the streamwise direction but also in the spanwise direction, the spatial correlation of the wall pressure fluctuations near the trailing-edge. For the separated flow case (alpha = 5 degrees), the porous surface is found to weaken the pressure fluctuations at the trailing-edge and results in 3 similar to 10 dB noise reduction over a wide range of frequency, via interrupting the edge-scattering and reducing the separated flow region over the upper surface of the plate. (C) 2011 American Institute of Physics. [doi:10.1063/1.3662447] | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | AMER INST PHYSICS | - |
dc.subject | PERTURBED COMPRESSIBLE EQUATIONS | - |
dc.subject | LARGE-EDDY SIMULATION | - |
dc.subject | MEDIA | - |
dc.subject | FLOW | - |
dc.subject | PREDICTION | - |
dc.subject | TRANSPORT | - |
dc.subject | BOUNDARY | - |
dc.subject | AEROACOUSTICS | - |
dc.subject | DERIVATION | - |
dc.subject | REDUCTION | - |
dc.title | Effect of passive porous surface on the trailing-edge noise | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Moon, Young J. | - |
dc.identifier.doi | 10.1063/1.3662447 | - |
dc.identifier.scopusid | 2-s2.0-84855293836 | - |
dc.identifier.wosid | 000298642400039 | - |
dc.identifier.bibliographicCitation | PHYSICS OF FLUIDS, v.23, no.12 | - |
dc.relation.isPartOf | PHYSICS OF FLUIDS | - |
dc.citation.title | PHYSICS OF FLUIDS | - |
dc.citation.volume | 23 | - |
dc.citation.number | 12 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Mechanics | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Mechanics | - |
dc.relation.journalWebOfScienceCategory | Physics, Fluids & Plasmas | - |
dc.subject.keywordPlus | PERTURBED COMPRESSIBLE EQUATIONS | - |
dc.subject.keywordPlus | LARGE-EDDY SIMULATION | - |
dc.subject.keywordPlus | MEDIA | - |
dc.subject.keywordPlus | FLOW | - |
dc.subject.keywordPlus | PREDICTION | - |
dc.subject.keywordPlus | TRANSPORT | - |
dc.subject.keywordPlus | BOUNDARY | - |
dc.subject.keywordPlus | AEROACOUSTICS | - |
dc.subject.keywordPlus | DERIVATION | - |
dc.subject.keywordPlus | REDUCTION | - |
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