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36results about How to "Reduce aerodynamic force" patented technology

Aircraft Having a Variable Geometry

An aircraft having a variable geometry for adapting the flight characteristics to different flight situations includes a fuselage with a pair of wings projecting on both sides of the fuselage in the transverse direction (y), each of which wings has an inner wing section arranged stationarily with respect to the fuselage and an outer wing section adjacent thereto and pivotable about a pivot axis. The pivot axis is oriented in a direction deviating from the longitudinal direction (x) of the aircraft by a maximum of 40°.
Owner:AIRBUS DEFENCE & SPACE

Turbomachine with angular air delivery

A turbomachine assembly comprising: an annular compression section; a casing formed by an outer annular shell (204) and an inner annular shell (206) secured inside the outer shell by means of a plurality of radial support arms (208); an annular combustion section housed inside the casing; and an annular turbine section. The air coming from the compression section presents rotary motion with an angle of inclination relative to a longitudinal axis (X-X) of the turbomachine, and the combustion section includes angular distribution means for determining air flow direction so as to impart on the gas leaving the combustion section rotary motion with an angle of inclination that is equal to or greater than the angle of inclination of the air leaving the compression section, said angular distribution means being formed by the support arms (208), each of which presents an angle of inclination relative to the longitudinal axis (X-X) of the turbomachine that is greater than or equal to the angle of inclination of the air leaving the compression section.
Owner:SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A

Turbomachine combustion chamber with helical air flow

The invention relates to a turbomachine combustion chamber having an inner wall, an outer wall surrounding the inner wall so as to co-operate therewith to define a space forming a combustion area, a transverse wall interconnecting the inner and outer walls, and fuel injection systems. The inner wall has a plurality of inner steps each extending radially towards the outside of the inner wall, the circumferential spacing between two adjacent inner steps defining an inner cavity. The outer wall includes a plurality of outer steps each extending radially towards the inside of the outer wall, the circumferential spacing between two adjacent inner steps defining an outer cavity. At least some of the inner and outer cavities are fed with air from outside the combustion chamber in a common direction that is circumferential, and with fuel in a direction that is radial.
Owner:SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A

Aircraft having a variable geometry

An aircraft having a variable geometry for adapting the flight characteristics to different flight situations includes a fuselage with a pair of wings projecting on both sides of the fuselage in the transverse direction (y), each of which wings has an inner wing section arranged stationarily with respect to the fuselage and an outer wing section adjacent thereto and pivotable about a pivot axis. The pivot axis is oriented in a direction deviating from the longitudinal direction (x) of the aircraft by a maximum of 40°.
Owner:AIRBUS DEFENCE & SPACE

Fan with area expansion between rotor and stator blades

ActiveUS20120034083A1Reduce noiseReduce sound power levelPropellersRotary propellersImpellerEngineering
An axial-flow fan structure is disclosed, having a localized area expansion between the rotor (i.e. front rotating impeller) and stator blades (i.e. rear stationary or fixed blades, sometimes called de-swirl vanes). The area expansion is provided by utilizing an impeller having a (slightly) falling tip contour (FTC).
Owner:MINEBEAMITSUMI INC

Compound type wind, rain and vibration resistance stay cable

The invention relates to a compound type wind, rain and vibration resistance stay cable. The stay cable is formed by embossing on the surface of a protection sleeve of a stay cable (1), and winding spiral bars (2). On the one hand, the stay cable utilizes the embossing type to change the positions of flow separation points of air flow around the original cross section, disturb the air flow around the cross section of the stay cable, reduce the vortex induced vibration, inhibit the formation of an upward water way and the axial flow, better inhibit wake flow galloping and rain-wind-induced vibration, and simultaneously ensure a smaller wind drag coefficient and reduce the wind load of bridge cables; on the other hand, the stay cable utilizes double spiral bars to forcibly guide rainwater to avoid the formation of the upward water way, and simultaneously disturb the flowing type of the cross flow, the stay cable reduces the correlation of vortex shedding, further avoids the generation of big and regular swirls and reduces the aerodynamic force of the exciting vibration. By jointly using the embossing type and the spiral bars, the vibration of inhaul cables of the cable-stayed bridge is effectively inhibited.
Owner:JIANGSU FASTEN STEEL CABLE CO LTD +1

Plug cap for air inlet path of engine and opening-closing system for plug cap

The invention discloses a plug cap for an air inlet path of an engine. The plug cap comprises a plug head and a connecting rod; the plug cap is an arc-shaped structure which is formed by enabling an end cover to rotate around an axis in a nose cone of the engine; the end surface consists of an L-like shaped curve, and line segments OM and ON which are separately connected to two end points of the curve C through a point O; the line segments OM and ON rotate to form a pneumatic molded surface; after the L-like shaped curve rotates, the initial section, the middle section and the tail section of the L-like shaped curve separately form a first side surface, a second side surface and a third side surface; the first side surface is adaptive to the lower conical surface of the nose cone of the engine; the third side surface is adaptive to the outer wall of a lip of the air inlet path of the engine; a gap is formed between the second side surface and the outer wall of the lip of the air inlet path; when the plug cap is closed, the first side surface and the third side surface are fitted to the plug head; an angle MON of the end surface is divided into two parts by a straight line passing through the point O, the part close to the nose cone is an upper angle being 14-20 degrees, and the other part is a lower angle being 16-17 degrees; and in the airflow direction, the projective plane of the plug head completely covers the lip of the air inlet path of the engine.
Owner:XIAN AEROSPACE PROPULSION TESTING TECHN INST

Outer wind shield for vehicle

The invention relates to an outer wind shield for a vehicle. The outer wind shield is characterized in that a guide groove is arranged at the vehicle bottom position of the outer wind shield, thus guide space of air flow can be increased, and the influence on the outer wind shield due to air flow disturbance at the vehicle bottom can be improved; a protecting steel sleeve is added at the installation hole position of the outer wind shield, thus the stress concentration on rubber due to installation threads can be reduced, the stressed area of an installation hole can be increased, the stress distribution situation of the installation hole can be improved, and the anti-bending performance of the outer wind shield can be increased through the supporting of the protecting steel sleeve; and a certain inwards-inclined angle exists between a wing plate of the outer wing shield and a vehicle body direction, thus pressure difference at two sides of the outer wind shield can be reduced, the eversion aerodynamic force suffered by the outer wind shield can be reduced, the air flow environment of the whole outer wind shield can be improved, the inwards-inclined angle is not less than 2 degrees, and the force distribution of the air flow on the outer wind shield can be more facilitated. According to the outer wind shield disclosed by the invention, through the improvement, the defect that the outer wind shield is in eversion or avulsion when a train is in high-speed running can be overcome, the service life of the outer wind shield is prolonged, and the replacing and repairing cost can be reduced.
Owner:ZHUZHOU TIMES NEW MATERIALS TECH

Turbomachine combustion chamber with helical air circulation

The invention relates to a turbomachine combustion chamber comprising an inner annular wall, an outer annular wall surrounding the inner wall so as to co-operate therewith to define an annular space forming a combustion area, a plurality of fuel injector systems comprising pilot injectors alternating circumferentially with full-throttle injectors, and at least one air admission opening out into the upstream end of the combustion area in a substantially longitudinal direction. The outer wall has a plurality of pilot cavities extending between the two longitudinal ends of the outer wall and extending radially towards thereof, the pilot cavities being fed with air from outside the combustion chamber in a common substantially circumferential direction. Each pilot injector opens out radially into a pilot cavity, and each full-throttle injector opens out radially between two adjacent pilot cavities.
Owner:SN DETUDE & DE CONSTR DE MOTEURS DAVIATION (S N E C M A)

Apparatus and method for dampening disk vibration in storage devices

Aerodynamic forces contribute to disk and actuator vibration leading to track positioning errors in storage devices such as hard disk drives. The invention provides a variety of dampening mechanisms and a method of dampening to alleviate these problems.
Owner:SAMSUNG ELECTRONICS CO LTD

Structurally integrated parabolic trough concentrator with combined PV and thermal receiver

The invention includes a parabolic solar concentrator typified by a highly integrated structure whereby, mirror, aerodynamic elements, a shell structure, cooling elements and other elements have been integrated to form a unibody structure, which is both stiffer and lighter than traditional trough structures. The invention includes; aerodynamic features that greatly limit lift forces induced by high speed winds, a receiver with liquid cooling for better control of PV cell temperatures and which allows for the collection of the heat for beneficial use, accommodations for a solar tracker, and improvements in the focusing and distribution of light using secondary mirrors. The receiver incorporates specific details to improve heat transfer and reduce parasitic pumping loads and incorporates secondary mirrors to increase light acceptance angles. Automated mirror washing is addressed. In applications where the heat is un-utilized the integrated radiator is employed to dissipate the heat using both convection and radiation heat transfer.
Owner:INGRAM JOHN C

Wiper blade

The present invention generally relates to a wiper blade for wiping a windshield, and more particularly to wiper blade including a spoiler that forms an air flow allowing the wiper blade to be in close contact with the windshield. The wiper blade according to the present invention has a frame, a spoiler receiving the frame therein and forming an upper surface of the wiper blade and a wiper lip extending downwardly from the frame to contact a windshield. The wiper blade includes the following: a frame including an adaptor coupler at a midway portion; a spoiler receiving the frame and provided next to either side of the adaptor coupler, the spoiler having a cross-section including leg sides of a front surface and a rear surface and a topside of a top surface; and an adaptor mounted to the adaptor coupler and connecting the frame to a wiper arm. A width of the top surface connecting the front surface and the rear surface of the spoiler is maximal near the adaptor coupler and becomes narrower toward a longitudinal end of the spoiler.
Owner:THE KOREA DEV BANK

Asymmetric compressor air extraction method

A method to mistune rotating stall aerodynamics by preventing the formation of coherent unsteady loads. Compressor air is extracted in an asymmetric circumferential pattern. The asymmetric bleed pattern disrupts the rotating stall cell rotational pattern, preventing the formation of a coherent aerodynamic excitation.
Owner:GENERAL ELECTRIC CO

Stay cable with porous hollow housing for cable stayed bridge

The invention relates to a stay cable with a porous hollow housing for a cable stayed bridge. The stay cable consists of a high-strength galvanized steel wire, a surface sheath, a spiral fin and a porous housing from inside to outside respectively, wherein the high-strength galvanized steel wire is fixedly arranged in the surface sheath; the surface sheath and the porous housing are concentric circular tubes; a certain gap is remained between the porous housing and the surface sheath; at least one spiral rib which is coaxial with the circular tubes is arranged in the space of the gap; the internal and external spiral edges of the spiral rib are fixedly adhered to the tube walls of the surface sheath and the porous housing respectively. According to the stay cable, the regularity of karman vortex shedding of the cable and the regularities of axial flow and axial vortex can be broken by the axial porous housing of the cable, and the relevancy of pneumatic acting force of the stay cable in the axial direction of the stay cable is reduced, so that the conditions for occurrence of dry cable galloping are damaged.
Owner:SHANGHAI UNIV

Turbomachine combustion chamber with helical air flow

The invention relates to a turbomachine combustion chamber having an inner wall, an outer wall surrounding the inner wall so as to co-operate therewith to define a space forming a combustion area, a transverse wall interconnecting the inner and outer walls, and fuel injection systems. The inner wall has a plurality of inner steps each extending radially towards the outside of the inner wall, the circumferential spacing between two adjacent inner steps defining an inner cavity. The outer wall includes a plurality of outer steps each extending radially towards the inside of the outer wall, the circumferential spacing between two adjacent inner steps defining an outer cavity. At least some of the inner and outer cavities are fed with air from outside the combustion chamber in a common direction that is circumferential, and with fuel in a direction that is radial.
Owner:SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A

Tilting landing gear systems and methods

Systems and methods for mechanically rotating an aircraft about its center-of-gravity (CG) are disclosed. The system can enable the rear, or main, landing gear to squat, while the nose landing gear raises to generate a positive angle of attack for the aircraft for takeoff or landing. The system can also enable the nose gear and main gear to return to a relatively level fuselage attitude for ground operations. The system can include one or more hydraulically linked hydraulic cylinders to control the overall height of the nose gear and the main gear. Because the hydraulic cylinders are linked, a change on the length of the nose cylinder generates a proportional, and opposite, change in the length of the main cylinder, and vice-versa. A method and control system for monitoring and controlling the relative positions of the nose gear and main gear is also disclosed.
Owner:BLENDED WING AIRCRAFT INC

Wiper blade

The present invention generally relates to a wiper blade for wiping a windshield, and more particularly to wiper blade including a spoiler that forms an air flow allowing the wiper blade to be in close contact with the windshield. The wiper blade according to the present invention has a frame, a spoiler receiving the frame therein and forming an upper surface of the wiper blade and a wiper lip extending downwardly from the frame to contact a windshield. The wiper blade includes the following: a frame including an adaptor coupler at a midway portion; a spoiler receiving the frame and provided next to either side of the adaptor coupler, the spoiler having a cross-section including leg sides of a front surface and a rear surface and a topside of a top surface; and an adaptor mounted to the adaptor coupler and connecting the frame to a wiper arm. A width of the top surface connecting the front surface and the rear surface of the spoiler is maximal near the adaptor coupler and becomes narrower toward a longitudinal end of the spoiler.
Owner:THE KOREA DEV BANK

Hovering toy creature

A hovering toy creature having a propulsion system, a control system, a winged body, and a wing actuation assembly. The winged body is mounted to the propulsion system, which is controlled by the control system. The wing actuation assembly is mounted to the winged body, and the wing actuation assembly is powered by the control system. The wing actuation assembly drives the wings in an oscillating flapping motion. The wings comprise apertures permitting air passage through the wing, thus reducing the aerodynamic effect of the flapping motion. In this manner, the wings produce a “bouncing” flight action, thus creating a realistic flight motion. In another embodiment, the propulsion system comprises one or more rotors in a coaxial arrangement. The hovering toy creature is operated by either a wireless control device or a timer device.
Owner:TANOUS WORKS

Unmanned aerial vehicle reducing aerodynamic interference

The invention discloses an unmanned aerial vehicle reducing aerodynamic interference. The unmanned aerial vehicle comprises a shell component, a digital component and a rectification component. The shell component comprises wings, upper propeller blades, propellers, lower propeller blades, foot stands, a vehicle body and a shock absorber, the wings are located on the right sides of the upper propeller blades and fixedly connected with the upper propeller blades, and the foot stands are located on the lower surface of the vehicle body and fixedly connected with the vehicle body; a fairing is arranged on the outer side wall of a vehicle body of an original unmanned aerial vehicle, thermal insulation sheets are arranged at the two ends of the upper surface of the inner portion of the fairing,when the unmanned aerial vehicle flies, the fairing is installed on the outer side wall of the vehicle body firstly and can reduce the environment harming effects caused by aerodynamic force, aerodynamic heating and sound vibration generated when the unmanned aerial vehicle flies in the atmosphere, the resistance, brought to the unmanned aerial vehicle, of the aerodynamic force in the atmosphereis reduced, the unmanned aerial vehicle flies stably, and meanwhile the high temperature resistant performance of the fairing can be improved through the thermal insulation sheets.
Owner:QINGYUAN JUJIN TECH CO LTD

Magnetic levitation track beam

The invention belongs to the field of magnetic levitation rail transit, and provides a magnetic levitation rail beam which comprises a bottom plate and two or more main beams arranged on the upper surface of the bottom plate, and a ventilation structure is arranged on the bottom plate. By means of the arrangement, the ventilation structure is arranged on the bottom plate, high-speed air flow generated above the bottom plate when a train runs can be guided out through the ventilation structure, aerodynamic force generated by the high-speed air flow to the bottom plate can be reduced, and therefore the adverse effect of the aerodynamic force on a rail is reduced.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP

Cylindrical traveling wave spoiler anti-dragging and damping device

The invention provides a cylindrical traveling wave spoiler anti-dragging and damping device. The device comprises a driving part, a first end cover, a second end cover and a framework. One end of the framework is connected with the first end cover, the other end of the framework is connected with the second end cover, and the second end cover is connected with the driving part. The windward side of the framework is a smooth arc surface, the leeside of the framework is provided with a first groove and a second groove, and the first groove and the second groove are symmetric. A first traveling wave cylinder belt drive mechanism is arranged in the first groove, and a second traveling wave cylinder belt drive mechanism is arranged in the second groove. The cylindrical traveling wave spoiler anti-dragging and damping device has the advantages that by controlling the speed of the first traveling wave cylinder belt drive mechanism and the speed of the second traveling wave cylinder belt drive mechanism, a series of stable vortexes are formed at the position of wave troughs, a shear layer in traditional significance is eliminated, formation of wake flow vortexes can be delayed or blocked, aerodynamic force on the surface of the structure is greatly reduced, and then the wind-induced vibration effect of the structure is effectively restrained or reduced.
Owner:HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL

Hovering Toy Creature

A hovering toy creature having a propulsion system, a control system, a winged body, and a wing actuation assembly. The winged body is mounted to the propulsion system, which is controlled by the control system. The wing actuation assembly is mounted to the winged body, and the wing actuation assembly is powered by the control system. The wing actuation assembly drives the wings in an oscillating flapping motion. The wings comprise apertures permitting air passage through the wing, thus reducing the aerodynamic effect of the flapping motion. In this manner, the wings produce a “bouncing” flight action, thus creating a realistic flight motion. In another embodiment, the propulsion system comprises one or more rotors in a coaxial arrangement. The hovering toy creature is operated by either a wireless control device or a timer device.
Owner:TANOUS WORKS

A Cylindrical Traveling Wave Spoiler Drag and Vibration Reduction Device

The invention provides a cylindrical traveling wave spoiler anti-dragging and damping device. The device comprises a driving part, a first end cover, a second end cover and a framework. One end of the framework is connected with the first end cover, the other end of the framework is connected with the second end cover, and the second end cover is connected with the driving part. The windward side of the framework is a smooth arc surface, the leeside of the framework is provided with a first groove and a second groove, and the first groove and the second groove are symmetric. A first traveling wave cylinder belt drive mechanism is arranged in the first groove, and a second traveling wave cylinder belt drive mechanism is arranged in the second groove. The cylindrical traveling wave spoiler anti-dragging and damping device has the advantages that by controlling the speed of the first traveling wave cylinder belt drive mechanism and the speed of the second traveling wave cylinder belt drive mechanism, a series of stable vortexes are formed at the position of wave troughs, a shear layer in traditional significance is eliminated, formation of wake flow vortexes can be delayed or blocked, aerodynamic force on the surface of the structure is greatly reduced, and then the wind-induced vibration effect of the structure is effectively restrained or reduced.
Owner:HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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