Class 244/200.1 - Vortex generation in boundary layer

Subclass of Class 244 - Aeronautics and astronautics
Definition: . Subject matter in which the surface of the airfoil has
No. of patents: 35
Last issue date: 09/13/2011

Number	Title	Issue Date
8016245	Dynamic bumps for drag reduction at transonic-supersonic speeds A system for reducing overall drag of a mobile platform includes a surface on which an airflow forms a boundary layer and a generally normal shockwave. The airflow is at a first velocity that is one of transonic and supersonic. An oscillating jet injects and extract...	09/13/2011
7878457	Retractable vortex generator A flow control device is disclosed including a flow control surface over which fluid is designed to flow in a predetermined direction. Vortex generators are associated with the flow control surface. Each respective vortex generator has a pivot axis that forms an acu...	02/01/2011
7832689	Element for generating a fluid dynamic force This invention relates to an element (11) for generating a fluid dynamic force, the element (11) comprising first (13) and second (15) surfaces extending in opposite directions from a leading edge (17) of the element (11) an...	11/16/2010
7815150	Beam director flow control Systems and methods are described for controlling flow disturbances emanating from a protrusion, such as a beam propagating device. In one embodiment, a method includes positioning a flow control element at least partially around a base portion of a protrusion, wher...	10/19/2010
7537182	Simultaneous multiple-location separation control A method of controlling a shear layer for a fluid dynamic body introduces first periodic disturbances into the fluid medium at a first flow separation location. Simultaneously, second periodic disturbances are introduced into the fluid medium at a second flow separa...	05/26/2009
7357358	Aircraft leading edge device systems and corresponding sizing methods Aircraft leading edge device systems and methods for sizing such systems are disclosed. In one embodiment, a spanwise lift coefficient distribution for an airfoil corresponding to at least one design condition and at least one aircraft angle of attack is identified,...	04/15/2008
7338011	Method making it possible to prevent vibration of a rudder of an aircraft and aircraft using this method A method for preventing vibration of a rudder of an aircraft may have, on a lateral aerodynamic surface of the aircraft's rudder, a protruding aerodynamic element capable of generating an aerodynamic effect tending to rotate the rudder about its articulation axis. A...	03/04/2008
7309049	Orbital debris shield An orbital debris shield for protecting the hull of a spacecraft. The shield is comprised of a number of flexible and releasably attached gores that substantially cover the hull. Interleafed between layers of the gores are layers of a spacing material. As debris col...	12/18/2007
7275721	Arrangement for generating vortexes A spoiler and wing of an aircraft. A bottom surface of the spoiler has several longitudinal, elongated grooves. At least some of the grooves are equipped with one or more vortex generators. Further, the invention relates to a wing having in its back part at least on...	10/02/2007
7255387	Vortex strake device and method for reducing the aerodynamic drag of ground vehicles An improved method and device for the reduction of aerodynamic drag and for increased fuel economy of ground vehicles by increasing the pressure on the rear surface of the vehicle with a plurality of vortices generated along the top and side surfaces of the ground v...	08/14/2007
7185853	Air discharge valve for an aircraft An air discharge valve for an aircraft has an inner valve flap (1) and an outer valve flap (3) which partially overlap each other to form a nozzle of the Laval type with a nozzle inlet (6) converging toward a nozzle neck (S) and with a nozzle ou...	03/06/2007
7100969	Wake disturbing apparatus and method for reducing drag Provided is a wake disturbing apparatus and method for reducing drag, which can considerably reduce drag caused by a sharp decrease in the pressure behind an object with a blunt trailing edge, such as a vehicle, while the object is traveling at high speed. The wake ...	09/05/2006
6612524	Forebody vortex alleviation device A forebody 10 for an aeronautical vehicle 12 is provided. The forebody 10 includes an exterior wall 14 having a first half 16 and a second half 18. The first half 16 has a first porous section 20 and the second half 18 has a second porous section 24. The ...	09/02/2003
4836473	Apparatus for influencing a boundary layer on the surface of a body moving through a medium The pressure drag on the skin of an aircraft is reduced by rigidly securing boundary layer influencing members to the skin of the aircraft, including the wings, the elevantor and fin/rudder assemblies, and the body near the tail end. These members may be ...	06/06/1989
4830315	Airfoil-shaped body An airfoil-shaped body has a relatively thin trailing edge with a series of alternating, adjoining, downstream extending troughs and ridges in its suction surface which form wave-like surface undulations terminating at the trailing edge. The ridges in the...	05/16/1989
4813635	Projectile with reduced base drag A projectile having a downstream extending surface of revolution which terminates as a blunt base has a plurality of circumferentially spaced apart U-shaped, downstream extending troughs in its surface. Each trough is essentially aligned with the directio...	03/21/1989
4776535	Convoluted plate to reduce base drag A body adapted to move downstream through a fluid has a downstream extending smooth surface terminating at a blunt base. Extending transversely across the smooth surface and disposed upstream of the blunt base is a thin, downstream extending plate closely...	10/11/1988
4718620	Terraced channels for reducing afterbody drag A fluid flow control for reducing the drag associated with an upswept afterbody includes a pair of ridges forming substantially symmetric flow channels arranged in an approximately helical fashion on either side of the afterbody so as to intersect at appr...	01/12/1988
4706910	Combined riblet and lebu drag reduction system The invention is a system of flow control devices which result in reduced skin friction on aerodynamic and hydrodynamic surfaces. The devices cause a breakup of large-scale disturbances in the boundary layer of the flow field. Referring to FIGS. 1 and 2, ...	11/17/1987
4699340	Laminar vortex pump system Streamwise ridges on a lifting wing intercept local flow consisting of free stream and spanwise crossflow to create a pattern of vortices over the wing and aligned with the ridge axes; the vortices act as suction pumps collecting low energy boundary layer...	10/13/1987
4696442	Vortex generators for inlets A pair of vortex generators are attached to the exterior surface of an aircraft and located forwardly of a flush inlet so as to effectively remove or reduce the thickness of a slower-moving boundary layer airflow ajdacent to the exterior aircraft surface ...	09/29/1987
4671474	Fluid control apparatus and method utilizing cellular array containing mini-vortex flow patterns An apparatus for controlling flow over a surface, especially transonic flow, including means for embedding within the surface small vortices with their axes parallel to said surface and transverse to said fluid flow, and means for driving said vortices....	06/09/1987
4664345	Method for stabilizing laminar separated boundary layers Separated laminar flow boundary layers are stabilized by delaying a transition into a turbulent flow and by reducing the size of the laminar boundary layer separation zone downstream of a disturbance in the surface contour of a body in the flow, such as a...	05/12/1987
4655419	Vortex generator A vortex generator mounted to an upper lifting surface of an airfoil, and having an upstanding generally planar vortex generating member. The forward edge portion of the member slants first upwardly and rearwardly from the airfoil surface, and then curves...	04/07/1987
4571192	Self propelled spherical vehicle A self-propelled spherical vehicle (10) for operation in a fluid medium utilizes an impeller (12) of approximately half the diameter of the sphere for propulsion. In addition to driving the vehicle, the impeller acts to draw the flow of fluid smoothly ove...	02/18/1986
4489905	Nacelle-pylon configuration for an aircraft and method of using the same A below-wing engine nacelle mounted by a pylon forwardly of a wing having a rearward sweep. The pylon upper outboard edge that extends forwardly of the wing is formed with a relatively sharp radius of curvature. Thus, airflow which flows over the top of t...	12/25/1984
4377982	Spherical vehicle for operation in a fluid medium A spherical vehicle for operation in a fluid medium utilizes an impeller of approximately half the diameter of the sphere for propulsion. In addition to providing the energy for driving the sphere, the propeller acts to draw the flow of fluid smoothly ove...	03/29/1983
4354648	Airstream modification device for airfoils An airfoil modification device that helps maintain airstream attachment to either upper or lower airfoil surfaces, the device in the form of a plurality of spaced, low profile rods arranged generally end-to-end and attached to the airfoil and generally no...	10/19/1982
4174083	Flow deflector for fluid inlet To enhance the flow of air into a flush-type, air inlet on the fuselage of an aircraft, a wing-like deflector is mounted on a pedestal attached to the aircraft and is positioned outwardly from the fuselage and forwardly of the inlet so as to deflect free ...	11/13/1979
4117995	Aircraft wing lift augmentation device A wing duct near and parallel to the leading edge of an aircraft wing receives air from the jet engines of the craft. The wing duct is spiral-like in cross section with an exit slit for directing high velociy air rearwardly over the dorsal wing surface an...	10/03/1978
4039161	Hidden vortex generators An improvement to the controllability of aircraft wherein vortex generators are connected to a control surface in front of the hinge line of the control surface so that when the control surface is deflected, the vortex generators project into the airstrea...	08/02/1977
4019696	Method of and apparatus for enhancing Coanda flow attachment over a wing and flap surface A method of enhancing Coanda flow attachment over a wing and flap surface of an upper surface blowing aircraft comprising the step of directing the jet exhaust flow or stream toward regions wherein the exhaust flow separates from the wing and flap surface...	04/26/1977
3974646	Turbofan engine with augmented combustion chamber using vorbix principle A mixed flow turbofan engine in which a portion of the core engine exhaust gases are passed into a pilot zone chamber where fuel is added thereto for vaporization therewith and wherein the fan air is passed over a series of vortex generators so that the v...	08/17/1976
3972494	Vehicle air screen apparatus A land, water or air vehicle has a jet air stream unit mounted in front with a plurality of distributed jets generated immediately preceding the front wall portion of the vehicle to reduce the opposing pressure as well as the mass of air with the resultin...	08/03/1976

PatentStorm

Bizarre Patents

PatentStorm News

Class 244/200.1 - Vortex generation in boundary layer