Results 261 to 270 of about 332,136 (301)

Wingtip Vortex Behavior in the Vicinity of the Maximum Lift to Drag Ratio Lift Condition

54th AIAA Aerospace Sciences Meeting, 2016
Adverse effects of lift induced drag on the aerodynamic efficiency of aircraft are well known. Lift induced drag is generated as a byproduct of downwash from the wingtip vortices. The flow physics associated with wingtip vortex core axial flow transformation from wake-like (velocity less-than the freestream) to jetlike (velocity greater-than the ...
Memon, Muhammad Omar, Altman, Aaron
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Modeling the Turbulent Vortex Wake Behind a High-Lift Wing

Fluid Dynamics, 2001
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Spalart, P. R., Strelets, M. Kh., Travin, A. K., Shur, M. L.   +3 more
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Dynamics of vortex rings moving counter the lift

Fluid Dynamics, 2017
The motion of a buoyant vortex ring counter the direction of the lift of given value is experimentally investigated on a wide range of the initial velocity of the ring. The dynamics of its parameters are determined. The experimental results are compared with the calculations according to the earlier developed theoretical model.
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Vortex Induced Lift on Two Dimensional Low Speed Wings

Studies in Applied Mathematics, 1984
Exact free streamline solutions are found for two dimensional inviscid incompressible flow past a single and a multiple flap wing using a hodograph method. It is shown that solutions do not exist for arbitrary shapes, but that a geometrical constraint must be satisfied between the shape of the wing and the angle of attack.
Saffman, P. G., Tanveer, S.
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Vortex Generation in a Low Speed Wind Tunnel and Vortex Interactions With a High-Lift Airfoil

30th AIAA Applied Aerodynamics Conference, 2012
This paper describes the design, construction and evaluation of a vortex generator in a closed wind tunnel, with the objective to produce well defined disturbances convecting over a high-lift airfoil. The vortex generator produces quasi two-dimensional vortices in transverse direction.
David Hahn, Peter Scholz, Rolf Radespiel
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Lift-induced wing-tip vortex attenuation

12th Aerospace Sciences Meeting, 1974
It has been shown by a new static airflow visualization method that a drogue device properly positioned downstream of the wing tip causes vortex breakdown. This same result has been obtained by mounting a jet engine simulator at the wing tip and directing the high-energy jet blast downstream into the vortex.
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Vortex force and lift induced drag in compressible flows

53rd AIAA Aerospace Sciences Meeting, 2015
Recently a definition of the lift induced drag in terms of a field integral of the Lamb vector has been proposed in case of incompressible high Reynolds number flow and verified by post processing CFD solutions around wings. The possibility to extend this definition also to the case of compressible flows is investigated in this paper.
MELE, Benedetto, OSTIERI, MARIO, TOGNACCINI, RENATO   +2 more
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A lifting-surface solution for vortex-induced airloads

AIAA Journal, 1971
Planar lifting-surface theory is applied to the problem of the loads induced on an infinite aspect-ratio wing by a straight, infinite, free vortex in a subsonic, compressible, freestream; the vortex lies in a plane parallel to the plane of the wing, at a given distance below it, and at an arbitrary angle with the wing centerline.
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Aeroacoustic interaction of a distributed vortex with a lifting Joukowski airfoil

9th Aeroacoustics Conference, 1984
A first principles computational aeroacoustics calculation of the flow and noise fields produced by the interaction of a distributed vortex with a lifting Joukowski airfoil is accomplished at the Reynolds number of 200. The case considered is that where the circulations of the vortex and the airfoil are of opposite sign, corresponding to blade vortex ...
J. HARDIN, S. LAMKIN
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Low-Speed Lift Enhancement of the Vortex-Lift Waverider During Pitching Oscillation

Journal of Aircraft
The vortex-lift waverider presents great potentiality in the design of wide-speed-range hypersonic vehicles. However, its constrained lift characteristics, resulting from vortex breakdown at low-speed, high-angle-of-attack (AOA) conditions, restrict its capability for horizontal takeoff and landing.
Feng Qu, Mingyu Li, Qian Zhao, Qing Wang
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