Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/5282
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dc.contributorDepartment of Mechanical Engineering-
dc.creatorZhang, MM-
dc.creatorCheng, L-
dc.creatorZhou, Y-
dc.date.accessioned2014-12-11T08:29:01Z-
dc.date.available2014-12-11T08:29:01Z-
dc.identifier.issn1070-6631 (print)-
dc.identifier.issn1089-7666 (online)-
dc.identifier.urihttp://hdl.handle.net/10397/5282-
dc.language.isoenen_US
dc.publisherAmerican Institute of Physicsen_US
dc.rights© 2006 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in M. M. Zhang, L. Cheng & Y. Zhou, Physics of Fluids 18, 046102 (2006) and may be found at http://link.aip.org/link/?phf/18/046102en_US
dc.subjectVorticesen_US
dc.subjectAerodynamicsen_US
dc.subjectNoise abatementen_US
dc.subjectFlow controlen_US
dc.subjectFlow visualisationen_US
dc.subjectClosed loop systemsen_US
dc.subjectFeedbacken_US
dc.subjectBladesen_US
dc.titleClosed-loop controlled vortex-airfoil interactionsen_US
dc.typeJournal/Magazine Articleen_US
dc.description.otherinformationAuthor name used in this publication: L. Chengen_US
dc.description.otherinformationAuthor name used in this publication: Y. Zhouen_US
dc.identifier.spage1-
dc.identifier.epage12-
dc.identifier.volume18-
dc.identifier.issue4-
dc.identifier.doi10.1063/1.2189287-
dcterms.abstractClosed-loop controlled interactions between an airfoil and impinging vortices were experimentally investigated. This work aims to minimize the fluctuating flow pressure (p) at the leading edge of the airfoil, which is a major source of the blade-vortex interaction noises commonly seen in rotorcrafts. Piezoceramic actuators were used to create a local surface perturbation near the leading edge of the airfoil in order to alter the airfoil-vortex interaction. Two closed-loop control schemes were investigated, which deployed p and the streamwise fluctuating flow velocity (u) as the feedback signal, respectively. As the control effect on p was measured using a fast response pressure transducer, the oncoming vortical flow was monitored using a particle image velocimetry and a hot wire. It was found that the control scheme based on the feedback signal u led to a pronounced impairment in the strength of oncoming vortices and meanwhile a maximum reduction in p by 39%, outperforming the control scheme based on the feedback signal p. Physics behind the observations is discussed.-
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationPhysics of fluids, Apr. 2006, v. 18, no. 4, 046102, p. 1-12-
dcterms.isPartOfPhysics of fluids-
dcterms.issued2006-04-
dc.identifier.isiWOS:000237136900041-
dc.identifier.scopus2-s2.0-33745589812-
dc.identifier.rosgroupidr33867-
dc.description.ros2006-2007 > Academic research: refereed > Publication in refereed journal-
dc.description.oaVersion of Recorden_US
dc.identifier.FolderNumberOA_IR/PIRAen_US
dc.description.pubStatusPublisheden_US
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