Noise radiation from small steps and cubic roughness elements in turbulent boundary layer flow.Report as inadecuate


 Noise radiation from small steps and cubic roughness elements in turbulent boundary layer flow.


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Type of Resource: text

Genre: Electronic Thesis or Dissertation

Date Issued: 2012

Publisher: Florida Atlantic University

Physical Form: electronic

Extent: ix, 104 p. : ill. (some col.)

Language(s): English

Summary: Ji and Wang (2010) propose that the dominant source of sound from a forward facing step is the stream wise dipole on the face of the step and that sources acting normal to the flow are negligible. Sound radiation normal to flow of forward facing steps has been measured in wind tunnel experiments previously by Farabee and Casarella (1986, 1991) and Catlett (2010). A method for evaluating sound radiation from surface roughness proposed in Glegg and Devenport (2009) has been adapted and applied to flow over a forward facing step which addresses the sound normal to the flow that was previously unaccounted for. Far-field radiation predictions based on this method have been compared with wind tunnel measurements and show good agreement. A second method which evaluates the forcing from a vortex convected past surface roughness using RANS calculations and potential flow information is also evaluated.

Identifier: 827937015 (oclc), 3358330 (digitool), FADT3358330 (IID), fau:4015 (fedora)

Note(s): by Benjamin Skyler Bryan.Thesis (M.S.C.S.)--Florida Atlantic University, 2012.Includes bibliography.Mode of access: World Wide Web.System requirements: Adobe Reader.

Subject(s): Turbulence -- Mathematical modelsAerodynamic noiseFluid-structure interactionStructural dynamicsAcoustic modelsComputational fluid dynamcs

Persistent Link to This Record: http://purl.flvc.org/FAU/3358330

Owner Institution: FAU



Author: Bryan, Benjamin Skyler.

Source: http://fau.digital.flvc.org/islandora/object/fau%3A4015



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