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Conference Paper: Sound Generated by a Wing with a Flap Interacting with a Passing Vortex

TitleSound Generated by a Wing with a Flap Interacting with a Passing Vortex
Authors
Issue Date2014
PublisherSpringer International Publishing.
Citation
The 2nd Symposium on Fluid-Structure-Sound Interactions and Control (FSSIC), Hong Kong, 20-21 May and Macau, 22-23 May 2013. In Lecture Notes in Mechanical Engineering, 2014, p. 211-216 How to Cite?
AbstractWe study the acoustic signature of a rigid wing, equipped with a movable downstream flap and interacting with a line vortex, in a two-dimensional low-Mach number flow. The flap is attached to the airfoil via a torsion spring, and the coupled nonlinear fluid–structure interaction problem is analyzed using thin-airfoil methodology and the Brown and Michael equation. Passage of the incident vortex above the airfoil initiates flap oscillations at the system natural frequency, amplified over all other frequencies excited by the vortex. Far-field sound radiation is analyzed, yielding the leading order dipole-type signature of the system. The acoustic radiation is dominated by vortex sound, consisting of relatively strong leading and trailing edge interactions of the airfoil with the incident vortex, together with late-time wake sound resulting from induced flap oscillations. In comparison with counterpart rigid (non-flapped) configuration, we find that the flap may act as sound amplifier or absorber, depending on the value of flap-fluid natural frequency.
DescriptionThis Book Series entitled: Fluid-Structure-Sound Interactions and Control: Proceedings of the 2nd Symposium on Fluid-Structure-Sound Interactions and Control
Persistent Identifierhttp://hdl.handle.net/10722/205261
ISSN

 

DC FieldValueLanguage
dc.contributor.authorManela, Aen_US
dc.contributor.authorHuang, Len_US
dc.date.accessioned2014-09-20T02:07:48Z-
dc.date.available2014-09-20T02:07:48Z-
dc.date.issued2014en_US
dc.identifier.citationThe 2nd Symposium on Fluid-Structure-Sound Interactions and Control (FSSIC), Hong Kong, 20-21 May and Macau, 22-23 May 2013. In Lecture Notes in Mechanical Engineering, 2014, p. 211-216en_US
dc.identifier.issn2195-4356-
dc.identifier.urihttp://hdl.handle.net/10722/205261-
dc.descriptionThis Book Series entitled: Fluid-Structure-Sound Interactions and Control: Proceedings of the 2nd Symposium on Fluid-Structure-Sound Interactions and Control-
dc.description.abstractWe study the acoustic signature of a rigid wing, equipped with a movable downstream flap and interacting with a line vortex, in a two-dimensional low-Mach number flow. The flap is attached to the airfoil via a torsion spring, and the coupled nonlinear fluid–structure interaction problem is analyzed using thin-airfoil methodology and the Brown and Michael equation. Passage of the incident vortex above the airfoil initiates flap oscillations at the system natural frequency, amplified over all other frequencies excited by the vortex. Far-field sound radiation is analyzed, yielding the leading order dipole-type signature of the system. The acoustic radiation is dominated by vortex sound, consisting of relatively strong leading and trailing edge interactions of the airfoil with the incident vortex, together with late-time wake sound resulting from induced flap oscillations. In comparison with counterpart rigid (non-flapped) configuration, we find that the flap may act as sound amplifier or absorber, depending on the value of flap-fluid natural frequency.-
dc.languageengen_US
dc.publisherSpringer International Publishing.en_US
dc.relation.ispartofLecture Notes in Mechanical Engineeringen_US
dc.titleSound Generated by a Wing with a Flap Interacting with a Passing Vortexen_US
dc.typeConference_Paperen_US
dc.identifier.emailHuang, L: lixi@hku.hken_US
dc.identifier.authorityHuang, L=rp00119en_US
dc.identifier.doi10.1007/978-3-642-40371-2_31-
dc.identifier.hkuros237391en_US
dc.identifier.spage211en_US
dc.identifier.epage216en_US
dc.publisher.placeSwitzerland-

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