Performance of Shark Skin Inspired Manufactured Models for Separation Control

dc.contributorHubner, James P.
dc.contributorMacPhee, David W.
dc.contributor.advisorLang, Amy W.
dc.contributor.authorParsons, Jacob Chase
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.date.accessioned2022-04-13T20:34:15Z
dc.date.available2022-04-13T20:34:15Z
dc.date.issued2020
dc.descriptionElectronic Thesis or Dissertationen_US
dc.description.abstractThe skin of fast-swimming sharks has been shown to have mechanisms able to reduce flow separation in both laminar and turbulent flows. This study analyzes arrays of bio-inspired microflaps and scales in a separated region generated by an adverse pressure gradient in a water tunnel environment. In the laminar boundary layer case, the microflap model bristles due to vortex interaction. This bristling controls the separation downstream of the model, reducing overall reversing flow by up to 59%. This investigation finds that the height of the protrusion into the boundary layer is an crucial factor in controlling the reversing flow. For the turbulent boundary layer, arrays of manufactured scales are tested in weak and strong adverse pressure gradients, controlled by a rotating cylinder. It has been found that the scales are ineffective at controlling separation in the weaker adverse pressure gradient case and increase the separation. However, in the stronger adverse pressure gradient conditions, the scales are highly effective at controlling separation, reducing the reversing flow by up to 70%. Additionally, the models are able to reattach the flow in extreme separation conditions.en_US
dc.format.mediumelectronic
dc.format.mimetypeapplication/pdf
dc.identifier.otherhttp://purl.lib.ua.edu/182106
dc.identifier.otheru0015_0000001_0004259
dc.identifier.otherParsons_alatus_0004M_14239
dc.identifier.urihttps://ir.ua.edu/handle/123456789/8438
dc.languageEnglish
dc.language.isoen_US
dc.publisherUniversity of Alabama Libraries
dc.relation.hasversionborn digital
dc.relation.ispartofThe University of Alabama Electronic Theses and Dissertations
dc.relation.ispartofThe University of Alabama Libraries Digital Collections
dc.rightsAll rights reserved by the author unless otherwise indicated.en_US
dc.subjectBio-inspired
dc.subjectboundary layer
dc.subjectdrag reduction
dc.subjectflow separation
dc.subjectpassive flow control
dc.subjectshark skin
dc.titlePerformance of Shark Skin Inspired Manufactured Models for Separation Controlen_US
dc.typethesis
dc.typetext
etdms.degree.departmentUniversity of Alabama. Department of Aerospace Engineering and Mechanics
etdms.degree.disciplineFluid mechanics
etdms.degree.grantorThe University of Alabama
etdms.degree.levelmaster's
etdms.degree.nameM.S.
Files
Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
u0015_0000001_0004259.pdf
Size:
3.62 MB
Format:
Adobe Portable Document Format