The Aerodynamics of Rapid Area Change in Perching Manoeuvres

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atmire.migration.oldid2982
dc.contributor.advisorRival, David
dc.contributor.advisorWood, David
dc.contributor.authorPolet, Delyle
dc.date.accessioned2015-02-02T22:31:47Z
dc.date.available2015-06-23T07:00:40Z
dc.date.issued2015-02-02
dc.date.submitted2015en
dc.description.abstractThis thesis presents a multidisciplinary study on bird perching to inspire Micro Aerial Vehicle design. Birds use a rapid pitch-up manoeuvre during perching, which modifies frontal area. Vorticity fields and forces are measured and simulated on an airfoil performing simultaneous deceleration and pitching to high angles of attack. Forces scale with the shape change number, a ratio between velocity of frontal area change and velocity change during deceleration. A simple analytical model agrees remarkably well with observed forces, and shows that the majority of forces are caused by boundary-layer separation and added-mass effects. Next, the kinematics of a small perching bird (the black-capped chickadee; Poecile atricapillus) are measured and parameterized with a three-dimensional analogue to the two-dimensional shape change number. The shape change numbers used by these birds are within the range of laboratory and computational tests discussed herein. These small birds use shape change numbers in proportion to the kinetic and potential energy at the start of the deceleration phase, in accordance with analytical predictions.en_US
dc.identifier.citationPolet, D. (2015). The Aerodynamics of Rapid Area Change in Perching Manoeuvres (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/28007en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/28007
dc.identifier.urihttp://hdl.handle.net/11023/2050
dc.language.isoeng
dc.publisher.facultyGraduate Studies
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subjectFluid and Plasma
dc.subjectEngineering--Mechanical
dc.subject.classificationBiomimicryen_US
dc.subject.classificationUnsteady Fluid Dynamicsen_US
dc.subject.classificationPerchingen_US
dc.subject.classificationBird Flighten_US
dc.subject.classificationRapid Area Changeen_US
dc.subject.classification3D Kinematicsen_US
dc.titleThe Aerodynamics of Rapid Area Change in Perching Manoeuvres
dc.typemaster thesis
thesis.degree.disciplineMechanical and Manufacturing Engineering
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameMaster of Science (MSc)
ucalgary.item.requestcopytrue
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