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dc.contributor.authorIzraelevitz, Jacob Samuel
dc.contributor.authorKotidis, Miranda P.
dc.contributor.authorTriantafyllou, Michael S
dc.date.accessioned2018-07-24T17:59:30Z
dc.date.available2018-07-24T17:59:30Z
dc.date.issued2018-07
dc.date.submitted2017-12
dc.identifier.issn2469-990X
dc.identifier.issn2469-9918
dc.identifier.urihttp://hdl.handle.net/1721.1/117089
dc.description.abstractFlapping wings in nature demonstrate a large force envelope, with capabilities far beyond the traditional limits of static airfoil section coefficients. Puffins, murres, and other auks particularly showcase this effect, as they are able to generate both enough thrust to swim and enough lift to fly, using the same wing, purely by changing the wing motion trajectory. The wing trajectory is therefore an additional design criterion to be optimized along with traditional aircraft parameters and could open the door to dual aerial-aquatic robotic vehicles. In this paper we showcase one realization of a three-dimensional flapping-wing actuation system that reproduces the force coefficients necessary for dual aerial-aquatic flight. The wing apparatus oscillates by the root and employs an active upstream and downstream sweep degree of freedom. We analyze two types of motions in detail: aerial motions where the wing tip moves upstream during the power stroke of each flapping cycle and aquatic motions where the wing tip moves downstream during the power stroke. We design these aerial and aquatic flapping-wing trajectories using an experiment-coupled optimization routine, allowing control of the unsteady forces throughout each flapping cycle. Additionally, we elucidate the wakes of these complex wing trajectories using dye visualization, correlating the wake vortex structures with simultaneous experiment force measurements. After optimization, the wing trajectories generate the large force envelope necessary for propulsion in both fluid media and furthermore demonstrate improved control over the unsteady wake.en_US
dc.publisherAmerican Physical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1103/PhysRevFluids.3.073102en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceAmerican Physical Societyen_US
dc.titleOptimized kinematics enable both aerial and aquatic propulsion from a single three-dimensional flapping wingen_US
dc.typeArticleen_US
dc.identifier.citationIzraelevitz, Jacob S. et al. "Optimized kinematics enable both aerial and aquatic propulsion from a single three-dimensional flapping wing." Physical Review Fluids 3, 7 (July 2018): 073102 © 2018 American Physical Societyen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Mechanical Engineeringen_US
dc.contributor.mitauthorIzraelevitz, Jacob Samuel
dc.contributor.mitauthorKotidis, Miranda P.
dc.contributor.mitauthorTriantafyllou, Michael S
dc.relation.journalPhysical Review Fluidsen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2018-07-16T18:00:10Z
dc.language.rfc3066en
dc.rights.holderAmerican Physical Society
dspace.orderedauthorsIzraelevitz, Jacob S.; Kotidis, Miranda; Triantafyllou, Michael S.en_US
dspace.embargo.termsNen_US
dc.identifier.orcidhttps://orcid.org/0000-0002-1555-9136
dc.identifier.orcidhttps://orcid.org/0000-0002-4960-7060
mit.licensePUBLISHER_POLICYen_US


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