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Design of Flapping Airfoil for Optimal Aerodynamic Performance in Low-Reynolds Number Flows

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dc.contributor.authorLee, Jung-Sang-
dc.contributor.authorKim, Chongam-
dc.contributor.authorKim, Kyu Hong-
dc.date.accessioned2009-08-11T04:35:45Z-
dc.date.available2009-08-11T04:35:45Z-
dc.date.issued2006-09-
dc.identifier.citationAIAA Journal, vol. 44, no. 9 , 2006, pp. 1960-1972en
dc.identifier.issn0001-1452-
dc.identifier.urihttps://hdl.handle.net/10371/6925-
dc.description.abstractUnsteady, viscous, incompressible flows over an airfoil under flapping motion are numerically investigated. Depending on key parameters such as Reynolds number, reduced frequency, and flapping amplitudes, a flapping airfoil could experience complex flow fields. The trailing-edge vortex plays an important role to induce inverse Kármán-vortex street which is a jetlike flow on the downstream and then generates thrust. And, the leading-edge separation vortex is closely related on the propulsive efficiency. Through careful computations of several pitching, plunging, and plunging combined with pitching modes in terms of flow and/or geometry parameters, the key physical flow phenomenon dictating the aerodynamic characteristics of flapping airfoil is identified. Based on the analysis of thrust coefficient and propulsive efficiency a new airfoil shape for optimal aerodynamic performance is proposed. The improved performance of the new flapping airfoil is validated in terms of thrust coefficient and propulsive efficiency in various low-Reynolds number flow regimes.en
dc.description.sponsorshipThe authors appreciate the financial support by the Basic Research
Program of the Korea Science & Engineering Foundation (Grant
No. R01-2002-000-00329-0), and by the Brain Korea-21 Program
for the Mechanical and Aerospace Engineering at Seoul National
University.
en
dc.language.isoen-
dc.publisherAmerican Institute of Aeronautics and Astronauticsen
dc.titleDesign of Flapping Airfoil for Optimal Aerodynamic Performance in Low-Reynolds Number Flowsen
dc.typeArticleen
dc.contributor.AlternativeAuthor김종암-
dc.contributor.AlternativeAuthor김규홍-
dc.identifier.doi10.2514/1.15981-
Appears in Collections:
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Mechanical Aerospace Engineering (기계항공공학부)Journal Papers (저널논문_기계항공공학부)
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