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- W2171259891 abstract "icro Air Vehicles (MAVs) are being considered for a wide range of roles from search-and-rescue in urban environments, military surveillance and reconnaissance, to planetary exploration. To accomplish these complex missions, a good understanding of complex flow physics involved in the flow separation and transition around the flexible lifting surface of MAV is crucial. During this study, an in-house, advanced simulation tool with coupled fluid-structure interaction, moving and deforming grid and high-fidelity numerical simulation capability has been leveraged and demonstrated. As typical MAV wing uses very flexible structure, a geometrically nonlinear deformation for a general brick finite element has been formulated and validated against theory solution. Previous experiments using a teardrop leading edge element and flexible flat plate trailing edge element were first used for the validation study on the coupled nonlinear structure dynamics and fluid dynamics. Very good agreements were demonstrated in terms of trailing edge displacement, the airfoil deformation during the plunging cycle, and thrust coefficient. The fluid dynamic analysis revealed that the leading edge teardrop element contributed to the majority of the thrust force. The present simulation also showed that the there is an optimal wing flexibility that one can achieve maximum thrust force. By analyzing the coupled fluid-structure interaction modal frequency, it was found that the MAV performance can be improved by exciting or by driving at the coupled fluid-structure interaction frequency. The extension of the study to 3D model demonstrated vortex break-down and flow transition into turbulence." @default.
- W2171259891 created "2016-06-24" @default.
- W2171259891 creator A5090784833 @default.
- W2171259891 date "2011-01-04" @default.
- W2171259891 modified "2023-09-25" @default.
- W2171259891 title "Micro Air Vehicle Performance Enhancement Using Excited Flexible Lifting Surface" @default.
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- W2171259891 doi "https://doi.org/10.2514/6.2011-1282" @default.
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