Results 251 to 260 of about 189,153 (303)
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Control effect of micro vortex generators on leading edge of attached cavitation
The Physics of Fluids, 2019In this study, we investigate the effects of micro vortex generators (VGs) installed close to the leading edge of a quasi-two-dimensional NACA0015 hydrofoil under cavitating and non-cavitating conditions.
S. Schmidt, D. Likhachev
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Trailing edge flap influence on leading edge vortex flap aerodynamics
Journal of Aircraft, 1983A study has been conducted to explore the effects of trailing edge flaps (TEF) on leading edge vortex flap (LEVF) aerodynamics. A variety of LEVF and TEF configurations were tested on flat plate delta wings with leading edge sweep angles of 60 and 75 deg.
Arthur C. Grantz, J. F. Marchman
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NEW TWISTS IN THE LEADING-EDGE VORTEX
Journal of Experimental Biology, 2004![Figure][1] Insects aren't airplanes. If they flew like airplanes, they would fall right out of the sky because their wings are much too small. But since they flap their wings, they can generate a `leading-edge vortex', a rotating element of fluid along the front of the wing ...
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Leading-edge vortex development on a pitching flat plate with multiple leading edge geometries
Experimental Thermal and Fluid Science, 2018Abstract This article investigates the dynamic stall of a pitching flat plate in order to facilitate lift control in applications such as flapping wings and micro-aerial vehicles. Constant-pitch-rate rotation, similar to ramp-and-hold, of a flat plate was investigated in an open-jet wind tunnel using embedded surface pressure sensors to assess vortex
Leknys, R. +3 more
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Three-Dimensional Substructure in a Leading Edge Vortex
41st AIAA Fluid Dynamics Conference and Exhibit, 2011High pitch rate manoeuvres have been studied in great depth in recent decades, in respect to rotor dynamic stall and, more recently, in understanding bird and insect flight with view to application in biomimetic micro air vehicles (MAVs). The flow topology arising from such unsteady airfoil movement is complex.
Abel-John Buchner +2 more
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Journal of Fluid Mechanics, 2014
Unsteady aerofoil flows are often characterized by leading-edge vortex (LEV) shedding. While experiments and high-order computations have contributed to our understanding of these flows, fast low-order methods are needed for engineering tasks.
K. Ramesh +4 more
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Unsteady aerofoil flows are often characterized by leading-edge vortex (LEV) shedding. While experiments and high-order computations have contributed to our understanding of these flows, fast low-order methods are needed for engineering tasks.
K. Ramesh +4 more
semanticscholar +1 more source
Unsteady behavior of spiral leading-edge vortex breakdown
21st Atmospheric Flight Mechanics Conference, 1996Unsteady characteristics of the leading-edge vortex breakdown on a 65-deg delta wing are investigated. Emphasis is placed on the longitudinal motion of the breakdown region and its spiral structure under static as well as dynamic conditions as they have an important impact on vehicle flight mechanics and may cause aeroelastic problems. The onset of the
X. Huang, E. Hanff
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On leading edge vortex and its control
16th Atmospheric Flight Mechanics Conference, 1989A simple model for the leading edge vortex and a postulation for the existence of a critical vorticity concentration above which a stable leading edge vortex cannot be maintained were proposed. Using the model and postulation, various aspects of vortex control by blowing were discussed.
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Control of leading edge vortex breakdown by blowing
26th Aerospace Sciences Meeting, 1988An investigation into the effects of using a jet of air to control the vortex breakdown position on a 70 degree delta wing is presented. The specific objectives focused on optimizing the blowing positions in terms of maximum lift increments obtained for minimum blowing rates.
K. VISSER, K. IWANSKI, R. NELSON, T. NG
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Leading Edge Vortex Formation on Finite Wings Using Vortex Particles
AIAA Scitech 2021 Forum, 2021Hugh J. Bird +3 more
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