Image showing formation of vortices behind the leading edge of a delta wing at high angle of attackA cloud of smoke shows the roll-up of the vortex sheet shed from the whole trailing edge of a wing producing lift from attached flow, with its core aligned with the wing tip. Vortex lift has an additional vortex close to the body when shed by a leading edge root extension or closer to the tip when shed by a sweptback leading edge.
Vortex lift is that portion of lift due to the action of leading edge vortices.[1] It is generated by wings with highly sweptback, sharp, leading edges (beyond 50 degrees of sweep) or highly-swept wing-root extensions added to a wing of moderate sweep.[2] It is sometimes known as non-linear lift due to its rapid increase with angle of attack.[3] and controlled separation lift, to distinguish it from conventional lift which occurs with attached flow.
^Aircraft Performance and Design, John D. Anderson, Jr., Tata McGraw-Hill Edition 2010,ISBN 978 0 07 070245 5, p.100
^"Why's And Wherefore's Of Wings", B.R.A. Burns, Air International magazine, February 1979, p.82
^Polhamus, E. C. (December 1966). "NASA Technical Reports Server (NTRS)" (PDF). Ntrs.nasa.gov. Retrieved 2020-11-02.
Vortexlift is that portion of lift due to the action of leading edge vortices. It is generated by wings with highly sweptback, sharp, leading edges (beyond...
the wing. In this condition, the centre of lift approximates to the centre of the area covered by the vortex. In the subsonic regime, the behaviour of...
surrounding flow field, induced by its own downwash, and suddenly loses lift. Since vortex rings are a surprisingly stable fluid dynamical phenomena (a form...
vortices, at the Vortex Facility at the Langley Research Center. Aspect ratio (wing) Contrail Helmholtz's theorems Horseshoe vortexLift-induced drag V...
realistic model, the lifting-line theory, the vortex strength varies along the wingspan, and the loss in vortex strength is shed as a vortex sheet all along...
In fluid dynamics, a vortex (pl.: vortices or vortexes) is a region in a fluid in which the flow revolves around an axis line, which may be straight or...
the lift distribution over a finite wing may be approximated by assuming that each spanwise segment of the wing has a semi-infinite trailing vortex behind...
A vortex generator (VG) is an aerodynamic device, consisting of a small vane usually attached to a lifting surface (or airfoil, such as an aircraft wing)...
was put forth by D. G. Ellis and J. L. Stollery in 1988 to describe vortexlift on sharp-edged delta wings. At high angles of attack, the flow separates...
helps to increase the stall angle of the vertical surface (resulting in vortexlift), and in this way prevent a phenomenon called rudder lock or rudder reversal...
A vortex ring, also called a toroidal vortex, is a torus-shaped vortex in a fluid; that is, a region where the fluid mostly spins around an imaginary axis...
their upper surfaces at high angles of attack. The vortex will lower the air pressure and cause lift to be greatly increased. This effect had been noticed...
Aerodynamic innovations included variable-camber wings and exploitation of the vortexlift effect to achieve higher angles of attack through the addition of leading-edge...
the inboard sections of the wings have additional slats to generate vortexlift over the inner wing and high-energy air-flow along the tail fin to enhance...
low speeds when taking off and landing is met by using vortexlift: as the aircraft slows, lift must be restored by raising the nose to increase the angle...
theory is that the crab claw wing works like a delta wing, generating vortexlift. Since the crab claw does not lie symmetrically to the airflow, like...
The Vortex lattice method, (VLM), is a numerical method used in computational fluid dynamics, mainly in the early stages of aircraft design and in aerodynamic...
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