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JP2001301696A |
To provide the noise lowering structure for lowering the aerodynamic noise of blades of a propeller and the flow noise of outer plates of an airframe. A fur material 1 is tightly adhered to the whole of a surface 20a of an airframe outer...
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JP2001520149A |
An air intake system disposable in an air vehicle turbo engine housing disposed in an exterior airflow for selectively reducing external engine boundary layer separation drag and external engine friction drag on the engine housing compri...
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JP2001294199A |
To reduce the resistance of a flat type two-dimensional rear fuselage by forming the rear fuselage in a flat shape and reducing the separation eddies in an air current. On this rear fuselage 10, a vertical tail assembly 11 and a horizont...
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JP3212692B2 |
PURPOSE: To provide a boundary layer control device for the rotor blade of a rotary-wing aircraft, which can suck in a boundary layer at the wing surface of the rotor blade with neither pressurizing nor decompressing means required or wi...
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JP3212687B2 |
PURPOSE: To provide a boundary layer control device for the rotary blade of a rotary wing airplane, capable of enhancing high speed performance via the delay of the occurrence of a stall phenomenon in the retreat zone of the rotary blade...
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JP3174072B2 |
An anti-icing system for leading edges (12) of an aircraft. Hot compressed air is discharged from a cavity behind the leading edge (12) through a multitude of small holes in the leading edge skin (30) into the airflow impinging on the le...
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JP2001080585A |
To enable adjustment of bleeding flow amount based on pressure variation in an air intake structure for a supersonic airplane. Plural bores 2 are provided on a wall surface 1 of an air intake bleeding boundary layer and flexible rubber r...
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JP2001050215A |
To expand an application range of a Karman's vortex reducing body and to enhance a degree of freedom at an application portion by providing the reducing body freely attachable/detachable to/from a surface of an object in contact with flu...
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JP2001041192A |
To conduct suppression operation before separation occurs by providing a sensor measuring a change in predetermined physical quantity in a place where fluid flows, detecting an unstable wave prior to the separation of fluid flow based on...
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JP3129696B2 |
A body having a propulsion system comprising an inlet (7, 29, 46) and means (6, 28, 43, 45) for drawing fluid through said inlet to be used to propel said body characterised in that said inlet (7, 29, 46) is disposed along a substantial ...
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JP2001010593A |
To effectively reduce the drag in various motions of a flying object.The thrust T of an aircraft is estimated by a thrust estimating means M1, the motion (the speed, the angular velocity, the angle of attitude, and the angle of attack) o...
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JP2001010594A |
To control the position of a transition point of a boundary layer in order to effectively reduce the drag in various motions of a moving body such as an aircraft.A transition point detecting means M1 detects the position of a transition ...
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JP2000517258A |
An article for reducing the drag caused by a fluid flowing over a surface comprises an outer layer having an exposed patterned surface that reduces drag, an inner reinforcing layer, and an intermediate layer for bonding the outer layer t...
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JP2000225992A |
To provide a fin stabilizer capable of damping the rolling motion of a hull by precluding exfoliation likely generated at a negative pressure surface even if the angle of attack α is >0 or α<0. A fin stabilizer of a vessel is composed ...
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JP2000199505A |
To sufficiently reduce a fluid frictional resistance by providing a groove receiving fluid moving along a surface of a substance relatively moving in fluid to turning the same to a moving direction, at the surface thereof. A substance B ...
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JP2000506466A |
PCT No. PCT/IB95/00818 Sec. 371 Date Mar. 23, 1998 Sec. 102(e) Date Mar. 23, 1998 PCT Filed Sep. 29, 1995 PCT Pub. No. WO97/12804 PCT Pub. Date Apr. 10, 1997In an aircraft (1) according to the invention the engine drives a blower and the...
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JP3012864B2 |
A laminar flow control aircraft wing combines suction surfaces and slots in its leading (18) and trailing edge (22) regions, with natural laminar flow over its main box (20) region to achieve laminar boundary layer flow over a majority o...
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JP2000500558A |
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 +E,ovs B+EE having flux lines along the surface of the wall and an elec...
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JP2000500211A |
A noise suppression system for a jet engine, the system having a substrate formed of open cell material, a layer of microporous material covering at least a portion of one surface of the substrate, a layer of substantially non-porous mat...
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JP2970761B2 |
A conformable drag reduction article is provided having a patterned surface capable of reducing drag resistance byfluid flowing thereover.
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JPH11182508A |
To reduce resistance applied to a body moved in fluid, and to increase lift in an aircraft and the like. The front surface area of a fluid intake 3 attached to a moving body 2 is enlarged and the area of an ejection opening 4 is decrease...
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JPH11148304A |
To expand the operating range of a wing by suppressing the separation of air when an angle of attack is changed. The trailing edge 3 of a wing 1 has cutouts or projections 9 for reducing the separation of air from a wing surface, which g...
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JPH1179096A |
To generate sufficient power of lift in the main wing of an aircraft even during moving-down flight with the nose of the aircraft directed down or during down-air current flight. A lift increasing device for an aircraft has an air guide ...
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JP2862855B1 |
To constantly keep an optimum state of a boundary layer, even when the attitude of a moving object or the state of fluid changes, by freely varying the surface form of the object. Many linear voice coil motors 1 consisting of a bobbin 4,...
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JPH1111397A |
To improve the air intake efficiency of a compressor and an engine by forming a common air intake by continuously arranging an air intake of an air intake duct for the compressor and an air intake of an air intake duct air intake duct fo...
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JPH10338199A |
To improve moving performance and to carry out safe high speed movement by arranging a large number of dimples or projections on an outer surface where a high speed moving body makes contact with fluid and reducing or delaying peeling of...
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JP2829575B2 |
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JPH10281115A |
To reduce the occurrence of fluid resistance exerted on an object placed in a flow, reduce the generation of a fluctuation fluid force, save energy of an apparatus and a device related to fluid, and realize stable and safe operation thro...
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JPH10236395A |
To stabilize a vortex generated from the leading edge by forming a triangle or a trapezoid so that the chord length may be increased from the upstream to the slip stream, and forming a section so that a part on the leading edge side from...
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JPH10183557A |
To reduce turbulence drag by regularly or irregularly providing multiple projections or recesses having a prescribed shape and introducing a disturbance promoting or suppressing the occurrence of a roll pair on a wall face at a prescribe...
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JP2741224B2 |
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JP2683685B2 |
To provide an auxiliary power system for short distance landing machine which can supply air for controlling a boundary layer stably. A compressor 21 for controlling boundary layer is driven by a first engine 11 through a first gear row ...
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JPH09507554A |
PCT No. PCT/EP94/03422 Sec. 371 Date Jun. 24, 1996 Sec. 102(e) Date Jun. 24, 1996 PCT Filed Oct. 18, 1994 PCT Pub. No. WO95/11388 PCT Pub. Date Apr. 27, 1995The invention relates to a surface of a body exposed to circumfluent fluid with ...
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JP2630701B2 |
PURPOSE: To obtain high operating characteristics in a symmetric blade type (wells) turbine rotor blade by deviating a zero lift angle to a negative (minus) value, and preventing a lift drag ratio, a tangential force coefficient, and eff...
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JPH09175497A |
To simplify the structure, and manufacture an aircraft at a low cost, by abolishing the wings of the aircraft, and composing the aircraft to generate all the dynamic lift by the fuselage part. The wings are abolished, and the fuselage pa...
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JP2578396B2 |
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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JPH0911991A |
To generate a high dynamic lift needed for takeoff and landing in jetting a jet stream in the circumferential direction of an outer peripheral sur face of a cylindrical body by providing a shift mechanism to shift the cylindrical body fr...
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JPH08512119A |
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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JPH08270616A |
PURPOSE: To control turbulence through compensation of a starting mode by connecting obliquely propagating structures so as to increase/decrease the interaction between a system of roll pairs and a propagation structure and locally guidi...
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JP2533988B2 |
An aircraft gas turbine engine is provided with a starting air turbine (50) that is directly connected through the starter gearbox (48) to the high pressure (HP) shaft (38) and is provided with a means to extract excess energy from engin...
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JPH08226414A |
PURPOSE: To reduce the flowing resistance of fluid for an increase in flow velocity by generating electronic flow between an electrode oppositely-mounted onto an individual surface through a clearance, and an individual. CONSTITUTION: An...
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JPH08133188A |
PURPOSE: To effectively reduce resistance of a wing in the main wing or the like of an aircraft without using power. CONSTITUTION: An opening part is provided in an end of a wing 2, to serve as a draft port 3, and it is connected through...
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JPH08503433A |
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 &cir& NOt (103) having flux lines parallel to the surface of th...
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JPH07508335A |
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 a near-wall region of the flow a magnetic field &upbar& B having flux lines parallel to the surfac...
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JPH07506318A |
A lifting body moves relative to a fluid, thereby creating a vortex field in the fluid downstream of the lifting body. The lifting body has a predetermined lift distribution along the length thereof which enhances the velocity component ...
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JPH07165156A |
PURPOSE: To improve the sectional surface shape of a small plate for reducing the frictional resistance which is arranged in parallel to the wall surface, concerning a device for reducing the frictional resistance which a turbulent flow ...
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JPH07504869A |
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 aerodina...
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JPH07117794A |
PURPOSE: To reduce a noise by controlling a change in pressure in fluid in the rear of an object by arranging a stream lining body in a rear end part of the object so as to run in the fluid flowing direction. CONSTITUTION: A shape of a r...
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JPH0737240B2 |
A hybrid laminar flow nacelle for housing an engine of an aircraft includes an outer annular cowl having a leading lip and radially spaced and axially extending annular outer and inner forward surface portions which merge at the leading ...
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JPH07108996A |
PURPOSE: To prevent holes from being plugged with dirt by providing each' layer with numerous holes regularly so as to be continuous from the surface layer to the inner layer, and making the thickness of each layer and the diameter of th...
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