scispace - formally typeset
Patent

System and method of vortex wake control using vortex leveraging

Alan J. Bilanin, +1 more
TLDR
In this article, a system and method for reducing the primary vortex wake structure generated by a lifting body mounted on an object moving through a fluid is described, which is achieved by altering the generated initial vortex wake to make it vulnerable to rapid breakup and, second, producing disturbances to this wake with secondary vortices from auxiliary lifting surfaces, called vortex leveraging tabs, to instigate this breakup.
Abstract: 
This invention relates to a system and method for reducing the primary vortex wake structure generated by a lifting body mounted on an object moving through a fluid. This is achieved by first, altering the generated initial vortex wake to make it vulnerable to rapid breakup; and, second, producing disturbances to this wake with secondary vortices from auxiliary lifting surfaces, called vortex leveraging tabs, to instigate this breakup. This invention relates to various fields of uses to include vortices generated by any type of lifting body moving through a fluid to include aircraft and watercraft, such as surface vessels and submarines.

read more

Citations
More filters
Patent

Noise reducing vortex generators on aircraft wing control surfaces

Ingo Dr.Ing. Borchers, +4 more
TL;DR: In this paper, vortex generators are arranged on the edges of aircraft wing control surfaces to generate smaller vortices that weaken the main vortex that would otherwise be generated at these areas and thereby reduce the aerodynamic generation of noise.
Patent

Aircraft wing tip having a variable incidence angle

Christopher A. Konings, +1 more
TL;DR: In this article, an embodiment of an aircraft wing includes a main wing section and a variable incidence wing tip, where the main wing is adapted to connect to an aircraft fuselage at a first angle of incidence.
Patent

Swing tip assembly rotation joint

Seiya Sakurai, +5 more
TL;DR: In this article, a rotation joint and methods for rotationally coupling a swing tip assembly to a fluid-dynamic body are presented, and a rotation plate is configured to couple to the swing-tip assembly.
Patent

Active flow control device and method for affecting a fluid boundary layer of a wind turbine blade

Imad Abdallah, +3 more
TL;DR: In this paper, an active flow control device and a method for affecting a fluid boundary layer of a wind turbine blade are disclosed, as well as a stand-alone module (40) including a plurality of such devices and/or modules.
Patent

Vortex generators on rotor blades to delay an onset of large oscillatory pitching moments and increase maximum lift

Michael A. McVeigh, +1 more
TL;DR: In this article, an airborne mobile platform (10) generally includes a plurality of rotating rotor blades operating in an airflow that forms a boundary layer on each of the rotor blades, and at least one of these rotor blades includes a section that encounters the airflow that includes an unsteady subsonic airflow having at least a varying angle of attack.
References
More filters
Journal ArticleDOI

Stability theory for a pair of trailing vortices

S. C. Crow
- 01 Dec 1970 - 
TL;DR: In this article, the authors considered the early stages of the formation of a train of vortex rings and found that their stability depends on the products of vortex separation 6 and cutoff distance d times the perturbation wavenumber.
BookDOI

Aircraft wake turbulence and its detection

John H. Olsen, +2 more
TL;DR: The proceedings of a symposium in aircraft wake turbulence held in 1970 are described in this article, including the properties of wakes, including their formation stability and decay, and data on interaction between wakes and following aircraft as well as experimental methods of observing wake properties.
Patent

Method and apparatus for delaying the separation of flow from a solid surface

Israel Wygnanski
TL;DR: In this paper, an active perturbation-producing element on the solid surface is driven to induce oscillations in the boundary layer of the fluid stream about an axis substantially perpendicular to the solid surfaces, to enhance the mixing of boundary layer in fluid stream.
Proceedings ArticleDOI

Aircraft wake dissipation by sinusoidal instability and vortex breakdown.

A. J. Bilanin, +1 more
TL;DR: In this paper, a model wing in a ship towing tank was used to demonstrate the sinusoidal instability of aircraft trailing vortices, and axisymmetric pressure gradients were imposed along the vortex core by the other sinusoidally deformed trailer.
Patent

Vortex alleviating wing tip

II Roger W. Griswold
TL;DR: In this paper, a wing tip is contoured and shaped to bring about a controlled mergence of fluid flows across the upper and lower wing surfaces and alleviation of the resulting vortex when the wing is producing lift or thrust.