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A theory for the core of a leading-edge vortex
Journal of Fluid Mechanics, 1961In the flow past a slender delta wing at incidence one can observe a roughly axially symmetric core of spiralling fluid, formed by the rolling-up of the shear layer that separates from a leading edge. The aim in this paper is to predict the flow field within this vortex core, given appropriate conditions at its outside edge.The basic assumptions are (i)
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Leading edge vortex and shear layer instabilities
36th AIAA Aerospace Sciences Meeting and Exhibit, 1998The stability of a leading edge vortex was studied using available flow visualization and velocity data. The development of a vortex can be envisioned to compose of three possible stages. During the initial stage, the shear layer and its associated vorticity immediately downstream from the apex coalesce to form a primary vortex core.
T. Ng, Doug Oliver
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The compressible inviscid leading-edge vortex
Journal of Fluid Mechanics, 1965The conically symmetric solution of the Eulerian equations of an incompressible fluid obtained by Hall, thought to be descriptive of flow properties in a leading-edge vortex, is generalized to include the effects of compressibility.
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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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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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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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Computation and visualization of leading edge vortex flows
Computing Systems in Engineering, 1990The modeling of vortical flows is a continuing requirement for the design and analysis of flight vehicles. In this paper, the computation of leading edge vortices is considered. The solution of the laminar, thin-layer Navier-Stokes equations for a transonic delta wing is presented as a representative example. Issues relating to the visualization of the
E.M. Murman, T.M. Becker, D. Darmofal
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2015
Leading edge vortices can create high local pressures which in some situations may be advantageous but in others may cause damage. This paper looks at three wind engineering situations: windborne debris, roof suctions on a low-rise building and pressures near the luff of a downwind sail, where the behaviour of the leading edge vortex is significant. In
Peter J, Richards +1 more
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Leading edge vortices can create high local pressures which in some situations may be advantageous but in others may cause damage. This paper looks at three wind engineering situations: windborne debris, roof suctions on a low-rise building and pressures near the luff of a downwind sail, where the behaviour of the leading edge vortex is significant. In
Peter J, Richards +1 more
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Numerical simulation of leading-edge vortex flows
17th Fluid Dynamics, Plasma Dynamics, and Lasers Conference, 1984Steady flowfields describing respectively the distinguished structure for subsonic, sonic, and supersonic leading-edge flow about a thin delta wing at angle of attack in a supersonic freestream are calculated numerically. Solutions of the steady three-dimensional compressible laminar Navier-Stokes equations are obtained by time integration.
Donald P. Rizzetta, Joseph S. Shang
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Turbulence modelling for leading-edge vortex flows
40th AIAA Aerospace Sciences Meeting & Exhibit, 2002H. Dol, J. Kok, B. Oskam
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