Results 221 to 230 of about 4,278 (263)

Comment on "Analytical Prediction of Vortex Lift"

Journal of Aircraft, 1982
S comments are warranted concerning the paper by J.W. Purvis entitled "Analytical Prediction of Vortex Lift," which appears in the April 1981 issue of the Journal of Aircraft. The first comment is relative to the use of singular loadings in the design of mean camber shapes for wings experiencing leading-edge-vortex separated flow. By comparison, Ref. 1
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Lift-Oscillator Model of Vortex-Induced Vibration

Journal of the Engineering Mechanics Division, 1970
The main feature is the representation of fluctuating lift behavior in terms of a proposed wake-oscillator. The primary purpose of the paper is to demonstrate the potential of the wake-oscillator concept for future studies. The elastically mounted cylinder is modeled as a second-order, linear, damped system.
ROnald T. Hartlen, Iain G. Currie
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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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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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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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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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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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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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Lift Augmentation between Passive and Active Vortex Generator

Applied Mechanics and Materials, 2016
This study was conducted to investigate the performance of passive and active vortex generator on the wing’s flap. The triangular shape of passive vortex generator (VG) was developed and attached on the wing’s flap leading edge while the plasma actuator performed as active vortex generator.
Nur Faraihan Zulkefli, Zulhilmy Sahwee, Nurhayati Mohd Nur, Muhamad Nor Ashraf Mohd Fazil, Muaz Mohd Shukri   +4 more
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