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WO/1995/017335A1 |
A floating speed electrically driven suction system (10) for sucking boundary layer air flow off the external surface (14) of an aircraft. A variable speed electrical generator (22) drives a variable speed electrical motor (28) which in ...
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WO/1995/016607A1 |
A reverse delta aerodynamic wing has a basic reverse delta wing portion bounded by a leading edge (30) and by a pair of trailing edges (10) extending from respective ends of said leading edge (30) toward a trailing apex point (P) and res...
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WO/1995/011388A1 |
The surface (12) of a body (10) immersed in a fluid flow has projections (14) on the base surface. In order to design a more flow-favourable surface (12) of a body (10) immersed in a fluid flow and having projections (14) on the base sur...
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WO/1995/011160A1 |
An aircraft wing possesses at least one vortex generator for controlling boundary layer separation, each vortex generator, which may be in the form of thin wires, being located entirely within the boundary layer such that the wing genera...
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WO/1995/009764A1 |
A method of producing lift for a heavier-than-air aircraft by directing a generated flow of gas onto the aerodynamic surface, with regulation of the angle between the direction of gas outflow and the aerodynamic surface.
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WO/1995/000391A1 |
The boundary layer of a fluid travelling in a mean-flow direction relative to a surface of a wall of a body is controlled by generating in the fluid a magnetic field B having flux lines along the surface of the wall and an electric curre...
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WO/1994/015746A1 |
A layer (1) is formed from carbon fibre strands that are pre-impregnated with epoxy resin to hold the fibres together. The strands of carbon fibre that make up the layer (1) comprise eight uni-directional sub-layers that are assembled wi...
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WO/1994/010032A1 |
The boundary layer of a fluid travelling in a mean-flow direction relative to a surface of a wall (100) of a body is controlled by generating in the fluid a magnetic field B(Boolean not) (103) having flux lines parallel to the surface of...
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WO/1994/000342A1 |
The boundary layer of a fluid travelling in a mean-flow direction relative to a surface (104) of a wall of a body is controlled by generating in a near-wall region of the flow a magnetic field B(Boolean not) having flux lines (103) paral...
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WO/1993/024366A1 |
The invention relates to aviation namely to flying vehicles adapted to ride on an air cushion and to effect a take-off and landing on aerodromes of any category. The goal of the invention is to design a flying vehicle capable of aerodyna...
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WO/1993/022196A1 |
A lifting body (100) moves relative to a fluid, thereby creating a vortex field in the fluid downstream of the lifting body (100). The lifting body (100) has a predetermined lift distribution along the length thereof which enhances the v...
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WO/1993/019981A1 |
Measures are disclosed for modifying the boundary layer flow over fluid dynamic surfaces using patterns of riblets having heights which are varied in the direction of the stream to compensate for the self limiting effect of the riblets i...
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WO/1993/019980A1 |
Measures are disclosed for modifying the boundary layer flow over fluid dynamic surfaces using patterns of riblets which are set at a peak-to-peak spacing substantially less than 80 wall units and which are provided with boundary layer s...
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WO/1993/008375A1 |
A coaxial duplex turbine in which a Wales' turbine is provided on the inner peripheral side, a first annular fluid flow is formed for rotating said Wales' turbine, and a second fluid flow is formed radially outside the first flow so as t...
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WO/1993/008076A1 |
A method for controlling the boundary layer by suction of the air from vortex chambers provided in the aft part of the aerodynamic surface of the flying vehicle (FV), wherein the speed of the air suction is regulated being first increase...
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WO/1992/021560A1 |
Laminar flow of air in a boundary layer adjacent a face of an aircraft component exposed to air flow over it has been controlled by injecting air into the boundary layer or by withdrawing air from it through a multitude of small holes dr...
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WO/1992/005341A1 |
A rotor for collecting energy from or for imparting energy to a flowing medium has a hub and at least one rotor blade (10). In order to develop such a rotor so that its efficiency, both for collecting energy from and for imparting energy...
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WO/1991/009776A1 |
An airfoil is defined by an upper surface, a lower surface, and a venturi-shaped aperture formed therethrough. The venturi-shaped aperture (120) extends in the spanwise direction of the airfoil and is located in about the aft half sectio...
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WO/1991/003623A1 |
Disclosed is a system and method for suppressing rotor noise by distributing mass and momentum sources and sinks on the rotor blade (14). A source is located on the blade, and therefore has the directivity of moving, as opposed to a stat...
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WO/1991/000212A1 |
An airfoil (30) having a suction surface (36) and a pressure surface (38), the surfaces joined together at leading (32) and trailing portions (34) of the airfoil, the pressure surface diverging toward the suction surface at a corner, the...
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WO/1990/002079A1 |
The lateral blowing of air modifies the aerodynamic field about the wings and, according to the importance of the blown air flow rate, it improves the aerodynamic efficiency of the wings or even provides for the propulsion of the aircraf...
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WO/1989/011343A2 |
Drag reducing riblets, which may be grooves (7) or formations of other shape, are produced in various ways. A coating (3) of a thermo-plastic material is first applied to the surface (4) and the coating is then deformed by the applicatio...
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WO/1988/010210A1 |
A basic airfoil has its operating performance improved by incorporating one or more apertures in the airfoil adjacent its trailing edge. These apertures (24) extend from the upper surface (18) of the airfoil down through to the lower sur...
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WO/1987/006908A1 |
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 re-energising the boundary flow downstream ...
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WO/1984/003867A1 |
Wall turbulence is prevented upon relative motion between a wall and a fluid by establishing adjacent said wall a boundary layer and causing flow elements to oscillate three-dimensionally. This is accomplished by means of riblets (10) pr...
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WO/1983/003395A1 |
Aircraft characterized in that it is substantially comprised of a piloting station (1) mounted on a foldable frame (2) provided with a landing gear (3) provided with small wheels, a foldable rotary wing (4) provided with devices (5) for ...
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WO/1983/000129A1 |
Element, such as a rudder, and aircraft wing, a boat keel, a hydrofoil or an airfoil or the like is adapted to move through water or air and is so designed that the water or the air is allowed to enter at the upstream edge of the element...
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WO/1980/001673A1 |
A surface structure of a surface (10) adapted for movement relative to a fluid, said surface structure consisting of intersecting band systems (11, 12). Each band system is in the form of ridges or depressions parallel to one another, an...
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JP7460263B2 |
An intentional fluid manipulation apparatus (IFMA) assembly with a first thrust apparatus that imparts a first induced velocity to a local free stream flow during a nominal operation requirement. The first thrust apparatus creates a stre...
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JP7442807B2 |
To provide a protrusion structure control device that can control a peripheral air flow only in an objective speed range while suppressing increase in frictional resistance against an air flow and noise in other speed ranges.A protrusion...
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JP7421210B2 |
A small and inexpensive plasma actuator is capable of accelerating induced flow and increasing the effect of controlling flow. A plurality of electrode pairs are disposed on a dielectric layer upstream to downstream along a predetermined...
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JP2023554127A |
A method is provided that reduces complexity and cost while providing safety and reliability to an aircraft. An airfoil is disclosed having a leading edge and a trailing edge and a suction side and a pressure side. The suction side inclu...
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JP2023170951A |
To appropriately reduce frictional resistance on a surface of a movable body.A boundary layer control device for controlling a boundary layer formed on a surface of a movable body, comprises: a porous member provided on the surface of th...
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JP2023165409A |
To provide systems and methods for controlling flight control surfaces of aircraft, such as systems and methods for actively controlling hydraulic brake systems for flight control surfaces of aircraft.A system and a method include a flig...
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JP2023159233A |
To provide an aircraft propulsion system adapted to reduce surface friction on at least one portion of an outer surface.An aircraft may also have an internally cooled electric motor adapted for use within the aircraft. The motor may have...
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JP7369386B1 |
An object of the present invention is to provide a raised structure capable of suppressing the amplification of disturbances due to lateral flow instability on the surface of a leading edge region of an object, receding the position wher...
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JP7352429B2 |
An airflow separation detecting method includes: applying an alternating-current voltage having a predetermined voltage value to a plasma actuator, the plasma actuator being disposed on a part of a surface of an object; and detecting tha...
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JP7346165B2 |
A cross flow fan includes a plurality of vanes arranged around a rotation axis at predetermined intervals in the circumferential direction, a tongue section arranged on the outer circumferential side of the vanes, and jetting sections th...
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JP7333144B2 |
An aircraft propulsion system with a drag reduction portion adapted to reduce skin friction on at least a portion of the external surface of an aircraft. The drag reduction portion may include an inlet to ingest airflow. The aircraft may...
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JP7330848B2 |
Provided is an airflow control system for controlling airflow flowing over an upper surface of an aircraft. The airflow control system includes: a blowout port that is provided on a forward side of the upper surface of the aircraft to bl...
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JP7324645B2 |
An aircraft with an integrated boundary layer ingesting propulsion having a mechanically-distributed propulsion system. The mechanically-distributed propulsion system may include an engine to generate a mechanical drive power, a drive sh...
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JP2023076891A |
To reduce pressure resistance of a rotor head in a flight vehicle.A flight vehicle is equipped with a rotor shaft protruding upward from a fuselage, a rotor head connected to the rotor shaft, above the fuselage, and a pair of plate units...
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JP7285193B2 |
To provide a plasma actuator in which the generation of arc discharge can be suppressed.A plasma actuator includes: a plate-shaped dielectric layer that is a dielectric; a first electrode provided on a first face of the dielectric layer;...
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JP7235582B2 |
A cooling duct (10) configured to introduce air flow to a cooling target device provided in a helicopter body of a helicopter (1) includes a duct body (11), a front opening (15), an upper opening (16), a hinge (31), and a movable blade (...
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JP7214599B2 |
A braking force generation device is configured to have: a first mode in which a deflector and a blocker door are retracted with respect to a wing; a second mode in which, in a state where: (i) a leading edge of the deflector is separate...
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JP7213103B2 |
A blade includes an airfoil portion including a pressure surface and a suction surface each extending between a leading edge and a trailing edge along a spanwise direction, and at least one communication hole extending m the airfoil port...
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JP7210324B2 |
An airfoil includes an airfoil portion having a first airfoil surface and a second airfoil surface respectively extending along a spanwise direction between a leading edge and a trailing edge and having a symmetrical shape with respect t...
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JP7206129B2 |
An airfoil including: an airfoil portion having an airfoil surface; and a communication hole extending at least in the airfoil portion and a first opening open in the airfoil surface, through which the first opening is communicated with ...
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JP7158119B2 |
An aircraft steering system includes an electric actuator, a clutch, at least one plasma actuator, and a controller. The electric actuator is configured to vary an angle of a flight control surface of an aircraft. The clutch is configure...
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JP7158140B2 |
To provide a propulsion device and an air vehicle capable of acquiring thrust without using a rotary wing.A propulsion device comprises: an annular thrust wing part 12 whose cross section is formed into a prescribed wing-shape; a fluid s...
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