Results 301 to 310 of about 127,683 (368)
Aerospace Science and Technology, 2020 Both the transient formation and the stable attachment of leading-edge vortex (LEV) contribute to the high lift generation of an insect wing when it revolves at high angles of attack.
Long Chen, Jianghao Wu, Bo Cheng
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Journal of Fluid Mechanics, 2023
The physics of leading-edge vortex (LEV) stability on flapping wings and autorotating seeds is still underexplored due to its complex dependency on Reynolds number ($\textit {Re}$), aspect ratio (AR) and Rossby number (Ro). Our previous study observed an
Long Chen +4 more
semanticscholar +1 more source
The physics of leading-edge vortex (LEV) stability on flapping wings and autorotating seeds is still underexplored due to its complex dependency on Reynolds number ($\textit {Re}$), aspect ratio (AR) and Rossby number (Ro). Our previous study observed an
Long Chen +4 more
semanticscholar +1 more source
Lift generation mechanism of the leading-edge vortex for an unsteady plate
Journal of Fluid Mechanics, 2023The lift generation mechanism of leading-edge vortex (LEV) in the case of a pitching and plunging plate is studied using an experimental approach and the improved discrete vortex method in this research.
Zhenyin Li +3 more
semanticscholar +1 more source
Vorticity dynamics and stability of the leading-edge vortex on revolving wings
The Physics of Fluids, 2023The leading-edge vortex (LEV) is well known for its contribution to the high-lift generation in a wide variety of biological organisms, such as flying insects, auto-rotating samaras, and gliding snakes.
Long Chen, Bo Cheng, Jianghao Wu
semanticscholar +1 more source
Improved swimming performance in schooling fish via leading-edge vortex enhancement
Bioinspiration & Biomimetics, 2022The hydrodynamics of schooling fish has been the subject of continued investigation over the last 50 years; fish schools exhibit a variety of arrangements and several distinct mechanisms have been proposed to explain the hydrodynamic benefits of ...
J. Seo, R. Mittal
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Vorticity transfer in a leading-edge vortex due to controlled spanwise bending
, 2021The effect of dynamic spanwise bending on the vortex dynamics of an accelerating flat plate is studied with experiments and numerical simulations. A flat plate, held at an angle of attack of 30 degrees, is accelerated from rest to Reynolds number 2400 ...
Kun Jia +3 more
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Leading-Edge Vortex Lifts Swifts
Science, 2004The current understanding of how birds fly must be revised, because birds use their hand-wings in an unconventional way to generate lift and drag. Physical models of a common swift wing in gliding posture with a 60° sweep of the sharp hand-wing leading edge were tested in a water tunnel.
Videler, J. J. +2 more
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Journal of Fluid Mechanics, 2020
The flow topology and leading-edge vortex (LEV) formation and detachment mechanism of a pitching and plunging flat plate are experimentally investigated in this study. Focus is placed on three novel aspects.
Zhenyin Li +4 more
semanticscholar +1 more source
The flow topology and leading-edge vortex (LEV) formation and detachment mechanism of a pitching and plunging flat plate are experimentally investigated in this study. Focus is placed on three novel aspects.
Zhenyin Li +4 more
semanticscholar +1 more source
Vortex–leading-edge interaction
Journal of Fluid Mechanics, 1982Visualization of successive vortices impinging upon the leading edge of a wedge reveals patterns of deformation of each incident vortex; for certain offsets of the edge with respect to the incident vortex there is pronounced vortex shedding from the leading edge, whereby the shed vortex has a vorticity orientation opposite to that of the incident ...
Samir Ziada, Donald Rockwell
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Leading-edge vortex stability in insect wings
Physical Review E, 2005An analytical study is presented to determine if the persistency of the leading-edge vortex in an insect wing can be explained as the balance between vorticity generation at the leading edge and advection plus effects of vorticity stretching and tilting by the flow along the wing span.
F O, Minotti, E, Speranza
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