Show simple item record

dc.contributor.authorBENNETT, GARETHen
dc.date.accessioned2010-10-14T17:02:00Z
dc.date.available2010-10-14T17:02:00Z
dc.date.created5-8 Julyen
dc.date.issued2010en
dc.date.submitted2010en
dc.identifier.citationGareth J. Bennett, Francisco Rodriguez Verdugo, David B. Stephens, Shear Layer Dynamics of a Cylindrical Cavity for Different Acoustic Resonance Modes, 15th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, 5-8 July, 2010en
dc.identifier.otherYen
dc.identifier.urihttp://hdl.handle.net/2262/41052
dc.descriptionPUBLISHEDen
dc.descriptionLisbon, Portugalen
dc.description.abstractThis paper investigates the interaction between the shear layer over a circular cavity and the flow-excited acoustic response of the volume to shear layer instability modes. Within the fluid-resonant category of cavity oscillation, most research has been carried out on rectangular geometries and where cylinders are considered, side branch and Helmholtz oscillators are most common. In these studies, focus is generally restricted to either longitudinal standing waves or to Helmholtz resonance. In practical situations however, where the cavity is subject to a range of flow speeds, many different resonant mode types may be excited. The current work presents a cylindrical cavity design where Helmholtz oscillation, longitudinal resonance and also azimuthal acoustic modes may all be excited upon varying the flow speed. Experiments performed show how lock-on between each of the three fluid-resonances and shear-layer instability modes can been generated. A circumferential array of microphones flush mounted with the internal surface of the cavity wall was used to decompose the acoustic pressure field into acoustic modes and has verified the excitation of higher order azimuthal modes by the shear layer. One of these interior pressure signals was also used to provide a phase signal for averaging flow field measurements of the shear layer acquired using PIV. Observation of the PIV images provides insight into these acoustically coupled oscillations.en
dc.description.sponsorshipErasmus Mundus Master of Mechanical Engineering programmeen
dc.language.isoenen
dc.rightsYen
dc.subjectCylindrical Cavityen
dc.subjectAcoustic Resonance Modesen
dc.subjectShear Layeren
dc.subjectPIVen
dc.subjectAeroacousticsen
dc.titleShear Layer Dynamics of a Cylindrical Cavity for Different Acoustic Resonance Modesen
dc.title.alternative15th International Symposium on Applications of Laser Techniques to Fluid Mechanicsen
dc.typeConference Paperen
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/bennettgen
dc.identifier.rssinternalid66786en


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record