Results 321 to 330 of about 127,683 (368)
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Radial planetary vorticity tilting in the leading-edge vortex of revolving wings
The Physics of Fluids, 2019Previous studies suggested that Coriolis acceleration and spanwise flow both played key roles in stabilizing the leading-edge vortex (LEV) in revolving wings.
Nathaniel H. Werner +6 more
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Modeling of leading edge vortex burst
AIAA Atmospheric Flight Mechanics Conference and Exhibit, 2001The 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, 1996This 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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Leading-Edge Vortex Interactions at a Generic Multiple Swept-Wing Aircraft Configuration
Journal of Aircraft, 2019Experimental investigations on a generic low-aspect-ratio aircraft configuration with triple and double delta wing planforms were performed at subsonic speed.
S. Pfnür, C. Breitsamter
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A conceptual study of leading-edge-vortex enhancement by blowing
6th Fluid and PlasmaDynamics Conference, 1973A 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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Applied Thermal Engineering, 2020
This paper numerically investigates the flow and heat transfer characteristics of vortex cooling in an actual film-cooled leading edge. Two cases called Case P and Case S with coolant injection nozzles arranged on the side of leading edge pressure ...
Jiefeng Wang +4 more
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This paper numerically investigates the flow and heat transfer characteristics of vortex cooling in an actual film-cooled leading edge. Two cases called Case P and Case S with coolant injection nozzles arranged on the side of leading edge pressure ...
Jiefeng Wang +4 more
semanticscholar +1 more source
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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