Results 221 to 230 of about 7,443 (257)

Leading-Edge-Vortex Augmentation in Compressible Flow

Journal of Aircraft, 1975
Leading-edge-vortex enhancement by blowing has been explored experimentally. Conceptual half-span windtunnel tests were conducted on a wing-body-tail configuration with a cambered and twisted wing with leadingedge flaps. Blowing vortex augmentation is shown to be effective in improving both lift and drag due to lift at high angle of attack for the Mach
R. BRADLEY, P. WHITTEN, W. WRAY
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Multiple inviscid solutions for the flow in a leading-edge vortex

AIAA Journal, 2000
To analyze the flowfield inside the vortex formed at the leading edge of a highly swept wing at an angle of attack, conical similarity solutions of the compressible Euler equations have been obtained and compared to incompressible conical similarity flow solutions.
van Noordenburg, M.B.H., Hoeijmakers, Hendrik Willem Marie   +1 more
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Entrainment effect of a leading-edge vortex

AIAA Journal, 1987
Etude experimentale des caracteristiques de l'ecoulement dans un tourbillon de bord d'attaque.
N. G. Verhaagen, A.C.H. Kruisbrink
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Simulation of leading-edge vortex flows

Theoretical and Computational Fluid Dynamics, 1990
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Hsu, C.-H., Liu, C. H.
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A multi‐vortex model of leading‐edge vortex flows

International Journal for Numerical Methods in Fluids, 1983
AbstractA multi‐vortex model of the vortex sheets shed from the sharp leading edges of slender wings is considered. The method, which is developed within the framework of slender‐body theory, is designed to deal with those situations in which more than one centre of rotation is formed on the wing, for example on a slender wing with lengthwise camber or
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Modeling of leading edge vortex burst

AIAA Atmospheric Flight Mechanics Conference and Exhibit, 2001
The burst of leading edge vortex (LEV) is investigated by a modified quasi-cylindrical approximation (MQCA) for the sub-core of the vortex. By assembling LEV with the MQCA and evaluating the total pressure drop along the sub-core of LEV, a model for predicting the location of LEV burst is proposed.
Haiye Lou, X. Huang
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Interactions of a vortex with an oscillating leading edge

AIAA Journal, 1996
This study adresses the detailed structure of the interaction of an incident vortex with a leading edge that is oscillating at the frequency of the incident vortex street. Instantaneous streamline patterns and vorticity distributions allow characterization of the mechanisms of interaction as a function of the timing, or phase shift, of the incident ...
R. W. Jefferies, D. Rockwell
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Dynamic Stall Control by Leading Edge Vortex Generators

Journal of the American Helicopter Society, 2008
A new concept of passive dynamic-stall control was developed and tested on an OA209 rotorcraft airfoil during two wind-tunnel test campains in 2004 and 2005. Small vortex generators are mounted at the leading edge of the rotor blade. At low incidence they are located close to the stagnation point and do not impact the flow field.
Mai, Holger, Dietz, Guido, Geißler, Wolfgang, Richter, Kai, Bosbach, Johannes, Richard, Hughes, de Groot, Klaus   +6 more
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A conceptual study of leading-edge-vortex enhancement by blowing

6th Fluid and PlasmaDynamics Conference, 1973
A conceptual wind-tunnel-test program has been conducted to verify that blowing a stream of highpressure air over a swept-wing surface in a direction roughly parallel to the leading edge enhances the vortex system. The blowing is shown to intensify the leading-edge vortex and thus delay the deleterious effects of vortex breakdown to higher angle of ...
R. G. Bradley, W. O. Wray
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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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