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Separation Control on NACA23012 using Synthetic Jet

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dc.contributor.authorKim, Sang Hoon-
dc.contributor.authorKim, Chongam-
dc.date.accessioned2009-08-11-
dc.date.available2009-08-11-
dc.date.issued2009-
dc.identifier.citationAerospace Science and Technology 13 (2009) 172-182en
dc.identifier.issn1270-9638-
dc.identifier.urihttps://hdl.handle.net/10371/6874-
dc.description.abstractA numerical study of separation control has been made to investigate aerodynamic characteristics of NACA23012 airfoil with synthetic jets. Computed results demonstrated that stall characteristics and control surface performance could be substantially improved by resizing separation vortices. The maximum lift was obtained when the separation point coincides with the synthetic jet location and the non-dimensional frequency is about 1. In addition, separation control effect was proportional to the peak velocity of the synthetic jet. It was observed that the actual flow control mechanism and flow structure is fundamentally different depending on the range of synthetic jet frequency. For low frequency range, small vortices due to synthetic jet penetrated to the large leading edge separation vortex, and as a result, the size of the leading edge vortex was remarkably reduced. For high frequency range, however, small vortex did not grow up enough to penetrate into the leading edge separation vortex. Instead, synthetic jet firmly attached the local flow and influenced the circulation of the virtual airfoil shape which is the combined shape of the main airfoil with the separation vortex. As a way to reduce the jet peak velocity, performance of a multi-array synthetic jet was investigated. Moreover, a high frequency multi-location synthetic jet was exploited to efficiently eliminate the unstable flow structure which was observed in low frequency range. Finally, by changing the phase angle in multi-location synthetic jets, highly controlled flow characteristics could be obtained with multi-array/multi-location synthetic jets. This shows efficiency of the current approach in separation control using synthetic jet.en
dc.description.sponsorshipAuthors gratefully acknowledge the financial support by Defense
Acquisition Program Administration and Agency for Defense
Development (UD070041AD), the Brain Korea 21 Project, the Smart
UAV Development Program of the 21th Frontier R&D Program
sponsored by the Ministry of Knowledge Economy, and KISTI Supercomputing
Center (KSC-2007-S00-1016).
en
dc.language.isoen-
dc.publisherElsevieren
dc.subjectflow controlen
dc.subjectseparation controlen
dc.subjectsynthetic jeten
dc.subjectmulti-array/multi-location synthetic jeten
dc.titleSeparation Control on NACA23012 using Synthetic Jeten
dc.typeArticleen
dc.contributor.AlternativeAuthor김상훈-
dc.contributor.AlternativeAuthor김종암-
dc.identifier.doi10.1016/j.ast.2008.11.001-
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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