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Match Document Document Title
7234921 Method for increasing operating efficiency of the rotor blade of an aerogenerator (variants)  
A method for enhancing effectiveness of a rotor blade of a wind energy device (a wind-wheel of electric generating unit), according to which a rotor blade is implemented in the form of a...
7152829 Perforated skin structure for laminar-flow systems  
The outer skin ( 100 ) of an aerodynamic body ( 40 ) has perforations ( 200 ) arranged in particular patterns in respective spanwise extending groups or bundles ( 250 ). Each perforation is...
7134631 Vorticity cancellation at trailing edge for induced drag elimination  
Wing tip vortices are evident from airliner vapor trails, and helicopter blade slap. Elliptically loaded high aspect ratio tapered wings have minimum induced drag but cannot eliminate it. Different...
6866233 Reconfigurable porous technology for fluid flow control and method of controlling flow  
The present invention relates to a reconfigurable porous technology for fluid flow control system and more particularly to reconfigurable porosity fluid flow control system for vehicles such as...
6302360 Vortex generation for control of the air flow along the surface of an airfoil  
Apparatus for generating vortices to control the flow of air across a airfoil of an aircraft includes a series of pressure active regions arranged along the leading edge of the airfoil. The...
6216982 Suction device for boundary layer control in an aircraft  
A system for achieving a boundary layer control by sucking at least a portion of the boundary layer air flow through perforated or porous suction areas on the outer skin of the wings or other areas...
6135395 Aircraft wing leading edge high lift device with suction  
An aircraft wing, wing assembly and method of reducing drag are provided. The wing asembly includes a main wing portion (10) and a leading edge high lift portion (12). The high lift portion is...
6068328 Vehicular boundary layer control system and method  
A vehicular boundary layer control system utilizing a series of external perforation arrays and suction sources controlled by a digital signal processor or microprocessor. Each array of...
6050527 Flow control device to eliminate cavity resonance  
A flow control device and method for eliminating flow-induced cavity resonance within a closed or nearly closed end flow passage (20) having an inlet opening (30) defined between an upstream inlet...
5971327 Mesoflap passive transpiration system and method for shock/boundary layer interaction control  
A passive transpiration system for controlling interaction between turbulent boundary layer air and an impinging shock during supersonic airflow by application of a panel including passively...
5884873 Suction generator system in an aircraft for maintaining a laminar boundary flow  
Boundary layer air on the skin structure of an aircraft is sucked off through suction holes in the aircraft skin structure by a least one ejector pump. The ejector pump is operated by at least one...
5823468 Hybrid aircraft  
A hybrid aircraft is taught having VTOL, R-VTOL and S-STOL capabilities. The aircraft has a lifting body hull and four wing sections arranged in tandem which are pivotally moveable about their...
5806793 Cooling device for a turboshaft engine on an aircraft  
A cooling device for an aircraft turboshaft engine includes a boundary layer suction device formed by a perforated external wall portion of the aircraft, a collector on the inside of the wall...
5798465 Method for actively damping global flow oscillations in separated unstable flows and an apparatus for performing the method  
The method for damping global flow oscillations (20a.x, 20b.x) in a flowing medium in the region of an unstable flow (10) separating itself from at least one boundary surface (11, 12) is comprised...
5779196 Ram air drive laminar flow control system  
An improvement to supersonic laminar flow control suction systems, including an inlet air duct (32) for providing subsonic ram engine inlet air, is provided. The inlet air duct (32) supplies air...
5772156 Aircraft boundary layer control system with discharge transpiration panel  
An improvement to boundary layer control system, including a transpiration panel (58) for transpiring suction air in a distributed manner, is provided. The transpiration panel (58) replaces the...
5618363 Method of manufacturing a porous material  
A porous material is manufactured by weaving polycarbonate fibres through a tow of carbon fibres which has been pre-impregnated with an epoxy resin. A second layer of pre-impregnated carbon fibres...
5591511 Superplastically formed structure having a perforated skin  
A perforated sheet is diffusion bonded to a thin solid sheet. Each of the perforations of the perforated sheet is tapered, having a maximum diameter at the surface that is not bonded to the thin...
5590854 Movable sheet for laminar flow and deicing  
A movable sheet overlying a wing is disclosed that creates laminar flow over its exposed surface. The movable sheet serves as an integral, retractable shield for protecting a suction support...
5542630 Control of fluid flow  
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...
5535967 Floating speed electrically driven suction system  
A floating speed electrically driven suction system for sucking boundary layer air flow off the external surface of an aircraft. A variable speed electrical generator drives a variable speed...
5531406 Flow-vectored trailing-edge for airfoils and jets  
Apparatus and method for airflow vectoring control for an airfoil, a two dimensional jet, and the like. An airfoil or jet with a blunt open edge and a suction system for sucking air into the open...
5490644 Ducted boundary layer diverter  
Boundary layer control apparatus is provided (22). The boundary layer control apparatus (22) is for use with an aircraft propulsion nacelle (12) positioned such that the air inlet (14) of the...
5480110 Transport plane with stub tail  
A transport plane with stub tail, which is preferably propelled by two jet engines. The intake air is fed to the engines directly integrated in the fuselage tail via a diffusor, the diffusor is a...
5417391 Method for control of the boundary layer on the aerodynamic surface of an aircraft, and the aircraft provided with the boundary layer control system  
A method and apparatus for boundary layer control by sucking air off the vortex chambers established in the trailing-edge portion of an aircraft aerodynamic surface. The rate of air bleed is...
5368258 Arrangement for maintaining laminar air flow over gaps in aircraft engine nacelle surfaces  
A system for eliminating turbulence in aerodynamic surfaces, such as engine nacelles, resulting from air passing over joints and gaps in the aerodynamic surface. Basically, this system includes a...
5366177 Laminar flow control apparatus for aerodynamic surfaces  
Aerodynamic boundary layer control apparatus comprising a panel assembly having one surface for immersion in an ambient fluid flow and provided with perforations, a first array of fluid...
5348256 Supersonic aircraft and method  
A supersonic aircraft having highly swept subsonic leading edge portions of the wings provided with boundary layer control suction slots. When the airplane is operating at high angles of attack...
5316032 Method and apparatus for laminar flow control  
A method and apparatus for establishing discrete zones of pressure at the surface of a perforated panel of the type typically used for laminar fluid flow control includes a first array of channel...
5297765 Turbine engine nacelle laminar flow control arrangement  
A laminar flow control arrangement for use in a nacelle for an aircraft turbine engine. The nacelle has a microporous outer skin in the area where air flow over the skin is to be maintained in...
5263667 Perforated wing panel with variable porosity  
The present invention involves laminar flow control for reducing drag on a body moving through a fluid. A skin is provided through which fluid in the boundary layer is drawn. The skin includes a...
5236155 Method of reducing drag in aerodynamic systems  
In the present method boundary layer thickening is combined with laminar flow control to reduce drag. An aerodynamic body is accelerated enabling a ram turbine on the body to receive air at...
5222698 Control of boundary layer flow  
Turbulence in the boundary layer of a flow of air across a surface is controlled by sucking air from the surface. A plurality of turbulence detectors are located in the surface downstream of...
5167117 Method and apparatus for cooling an airplane engine  
An apparatus for cooling components of an airplane engine at least partially operated by a cryogenically stored propellant via cooling air includes an air supply line for supplying the cooling air...
5143329 Gas turbine engine powered aircraft environmental control system and boundary layer bleed  
An aircraft gas turbine engine is provided with a starting air turbine that is directly connected through the starter gearbox to the high pressure (HP) shaft and is provided with an apparatus to...
5141182 Gas turbine engine fan duct base pressure drag reduction  
An aircraft is provided with an aircraft base pressure drag reduction apparatus including apparatus for ducting boundary layer air on board an aircraft wherein the air produces ram air drag,...
5114103 Aircraft engine electrically powered boundary layer bleed system  
An aircraft gas turbine engine is provided with an electrically powered boundary layer air bleed apparatus for bleeding boundary layer air off the nacelle and the wing or another part of the...
4993663 Hybrid laminar flow nacelle  
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...
4932612 Method and apparatus for reducing turbulent skin friction  
A method and apparatus for reducing the skin friction on objects in relative motion to a field of fluid. The areas of relative low speed motion are fixed to align with a series of ridges on the...
4807831 Combination boundary layer control system for high altitude aircraft  
The invention comprises a combination boundary layer control system that utilizes both suction and cryogenic wall cooling to reduce aircraft drag. The invention is particulary useful in...
4749150 Turbofan duct with noise suppression and boundary layer control  
A boundary layer control device is installed in the acoustically treated inlet duct of a turbofan engine. The device sucks off the turbulent boundary layer of air flowing over the inner or "air...
4726548 Airfoil self energizing boundary layer control system  
An elongated airfoil is perforated in such a way as to cause boundary layer air at the airfoil surface to be drawn into the airfoil, and then evacuated.
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...
4666104 Combination lift thrust device  
A combination lift and thrust device for increasing the performance of an aircraft by simultaneously reducing drag and augmenting the thrust of a turbojet engine carried within the device. The...
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...
4660788 Supercritical wing  
A supercritical wing of the variety in which the compression shock is stabilized is being improved by providing a suction device, substantially along the entire wing span, right at the chord...
4644889 Sailboat keel  
A sailboat keel structure, wherein the keel has an elongated body with fore and aft edges, and a generally elliptical cross-section. An elongated slotted opening is formed along the aft edge...
4575030 Laminar flow control airfoil  
A laminar flow control aircraft wing combines suction surfaces and slots in its leading and trailing edge regions, with natural laminar flow over its main box region to achieve laminar boundary...
4515101 Flow-modifying element, especially a rudder  
The object of this invention is an element, such as a rudder, and aircraft wing, a boat keel, a hydrofoil or an airfoil or the like, which is adapted to move through water or air and which is so...
4146202 Aircraft suction system for laminar flow control  
A porous aircraft skin for wetted areas of an aircraft employed in conjunction with a suction system of the aircraft to draw air inwardly through pores of said skin for laminar flow control. The...
Matches 1 - 50 out of 81 1 2 >