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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....
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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...
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6345791 |
Streamwise variable height riblets for reducing skin friction drag of surfaces
A series of parallel riblets extend from a smooth, aerodynamic surface for reducing the skin friction drag of the surface an airstream flows around it. The riblets extend longitudinally along the...
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6105904 |
Deployable flow control device
A deployable flow control device for a flow surface over which fluid having a fluid boundary layer flows which fluid boundary layer exhibits certain dynamics is disclosed. The deployable flow...
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5988568 |
Surface modification apparatus and method for decreasing the drag or retarding forces created by fluids flowing across a moving surface
A body moving through a fluid has air control and directing elements on its outer surface. The elements are laterally and longitudinally spaced and includes elements having a forward curved nose or...
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5772155 |
Aircraft wing flaps
A wing assembly has a wing and at least one slender delta shaped flap with sharp leading edges pointing into the flow direction and deployable above the upper wing surface close to the quarter line...
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5598990 |
Supersonic vortex generator
A vortex generator for attenuating flow separation which occur during supersonic flow of air over structure such as an aircraft airfoil, its fuselage, surfaces forming a part of a jet propulsion...
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5540406 |
Hydrofoils and airfoils
A low turbulence cambered surface foil, hydrofoil or airfoil, which contains indentations located on maximum camber across which a fluid can be flowed. The indentations create turbulence in the...
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5533865 |
Wind turbine
In order to reduce the noise nuisance caused during operation by rotor blades of a rotor of a wind turbine the rear edge of each blade is irregularly formed. In particular the saw-tooth form with a...
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5303882 |
Corner vortex suppressor
A corner vortex forms at the corners of a square or rectangular wind tunnel or water tunnel and disrupts the flow and creates excessive drag, turbulence, noise and wake. The corners defined by a...
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5253828 |
Concealable flap-actuated vortex generator
A concealable flap actuated vortex generator for generating a vortex on a lifting surface assembly, and an improved aircraft flight lifting surface having such concealable flap actuated vortex...
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5209438 |
Method and apparatus for delaying the separation of flow from a solid surface
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...
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5205519 |
Boundary layer relaminarization device
Relamination of a boundary layer formed in supersonic flow over the leading edge of a swept airfoil is accomplished using at least one band, especially a quadrangular band, and most preferably a...
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5156362 |
Jet engine fan nacelle
A jet engine fan nacelle which maintains attached flow during engine windmilling. The nacelle includes a cylindrical airfoil body having an inner surface. A plurality of vortex generators are...
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5074234 |
Vortex generators for sails
A vortex generator for attachment to the surface of a sail of a sailboat made from a strip of foldable material such as sail cloth or film that has a central member formed of two panels of the...
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5069402 |
Alleviation of aircraft fuselage form drag
An aircraft having an upswept tail section fuselage includes a single pair of large vortex generators mounted in the vicinity of the break in the fuselage ahead of or at the beginning of the tail...
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5058837 |
Low drag vortex generators
A generally V-shaped device (40) that is installed on a surface (48) over which there is a flowing medium (50) whose viscosity causes a boundary layer to form between free-stream medium and the...
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5054720 |
Trapped vortex cavity
An airfoil having a trailing edge member pivotally connected to a leading edge member. The trailing edge member having a vortex generating cavity that can be exposed or concealed from a stream of...
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5054412 |
Hydrodynamic skin-friction reduction
A process for reducing skin friction, inhibiting the effects of liquid turbulence, and decreasing heat transfer in a system involving flow of a liquid along a surface of a body includes applying a...
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5037044 |
Aerodynamic or hydrodynamic surfaces
An aerodynamic or hydrodynamic surface having a swept-back leading edge includes at least one flow separation device located on an attachment line of the leading edge, such as a step-up, step-down,...
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4913381 |
Aerodynamic components having leading edge devices
In modern thin wing aircraft flow separation at high incidence may originate at the leading edge. This invention combats the problem by restricting the growth of the region of separated flow by...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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,...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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3831885 |
AIRCRAFT WING WITH VORTEX GENERATION
Tail-less airplanes, such as dsclosed in U. S. Pat. No. 3,438,597 as a stall occurs or is about to occur, may be flown at very high angles of attack to generate favorable spanwise vorte, flows...
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3776363 |
CONTROL OF NOISE AND INSTABILITIES IN JET ENGINES, COMPRESSORS, TURBINES, HEAT EXCHANGERS AND THE LIKE
Intrinsic sound, noise and instabilities directly or indirectly due to the shedding of cross-stream vortices caused when air or fluid moves over the trailing edge of a plate, blade, vane or the...
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3744745 |
LIFTVANES
A set of lifting vanes attached to the sides of a body which protrudes forward from beneath the wing of an aircraft. The vanes are shaped and located to produce a significant downwash field...
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3463418 |
VORTEX GENERATOR FOR AIRPLANE WING
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3370810 |
Stall control device for swept wings
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3263945 |
Aircraft
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3144220 |
Control apparatus
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