45 results about "High momentum" patented technology

A method of fabricating a semiconductor-on-insulator structure from a pair of semiconductor wafers, includes forming an oxide layer on at least a first surface of a first one of the wafers and performing a bonding enhancement implantation step by ion implantation of a first species in the first surface of at least either of the pair of wafers. The method further includes performing a cleavage ion implantation step on one of the pair of wafers by ion implanting a second species to define a cleavage plane across a diameter of the wafer at the predetermined depth below the top surface of the one wafer. The wafers are then bonded together by placing the first surfaces of the pair of wafers onto one another so as to form an semiconductor-on-insulator structure. The method also includes separating the one wafer along the cleavage plane so as to remove a portion of the one wafer between the second surface and the cleavage plane, whereby to form an exposed cleaved surface of a remaining portion of the one wafer on the semiconductor-on-insulator structure. Finally, the cleaved surface is smoothed, preferably by carrying out a low energy high momentum ion implantation step.

The COIL gain generator system includes a reactor for producing singlet delta oxygen and a mechanism for mixing high momentum diluent with the singlet delta oxygen and with iodine for producing a high momentum, low static temperature mixture of the singlet delta oxygen, diluent and iodine. The singlet delta oxygen and the iodine react to produce excited iodine atoms which can lase efficiently due to the low static temperature and can, after lasing, recover to high pressure in a diffuser due to the high momentum of the mixture. This provides the capability of using a chemical pump which allows a completely sealed system with no outside exhaust.

An asymmetric tetrahedral vortex generator that provides for control of three-dimensional flow separation over an underlying surface by bringing high momentum outer region flow to the wall of the structure using the generated vortex. The energized near-wall flow remains attached to the structure surface significantly further downstream. The device produces a swirling flow with one stream-wise rotation direction which migrates span-wise. When optimized, the device produces very low base drag on structures by keeping flow attached on the leeside surface thereof. This device can: on hydraulic structures, prevent local scour, deflect debris, and reduce drag; improve heat transfer between a flow and an adjacent surface, i.e., heat exchanger or an air conditioner; reduce drag, flow separation, and associated acoustic noise on airfoils, hydrofoils, cars, boats, submarines, rotors, etc. during subsonic or supersonic conditions; and, reduce radar signatures by using faceted edges with angles amenable to stealth technologies.

A method and apparatus for scavenging lubricant is disclosed herein. In the invention, a rotating structure is encircled within a sump housing and subjected to lubrication. The sump housing collects high-momentum lubricant flow and low-momentum lubricant flow. The interior of the sump housing is separated into a plurality of chambers with at least one dynamic seal. The at least one dynamic seal extends between the sump housing and the rotating structure to isolate the high-momentum lubricant flow from the low-momentum lubricant flow.

A fuel cell system containing a mixer / eductor for reducing the pressure difference between the gases in the anode and cathode-sides of a fuel cell stack. The mixer / eductor is placed at the mixing point between the anode tail or exhaust fuel gas and the fresh air or oxidant supply gas inlet. The incoming oxidant pressure is converted to a high momentum stream to form a suction on the fuel exhaust gas. This suction compensates for pressure losses in the gas piping and the oxidizer used to burn the exhaust fuel gas resulting in substantial balancing of the anode and cathode-side gas pressures. The mixer / eductor can be in the form of an axial or annular jet pump unit, both of which are advantageous in aggressively mixing the fuel exhaust gas with the incoming oxidant or air. The mixer / eductor geometry can be varied to provide the proper suction to balance pressures over a chosen range of operating conditions. Additionally, the incoming fresh air flow rate or an oxidant exhaust recycle flow rate can be varied to actively balance pressures at any operating point.

The invention relates to a preparation method and application of a carbon / ceramic composite material, in particular to a preparation method and application of a carbon / ceramic composite material needed for braking a high-momentum delivery system. The preparation method includes: using a C / C composite material of 1.2-1.5 g / cm3 in density as a raw material; disposing the raw material in impregnation liquid I for impregnation, pyrolyzing in a protective atmosphere after impregnation, repeating impregnating-pyrolyzing operations until a carbon / ceramic composite material of 1.85-1.9 g / cm3 in density is obtained; treating the carbon / ceramic composite material obtained at high temperature until density of the carbon / ceramic composite material is lowered to 1.82-1.88 g / cm3 to obtain a pre-finished product; disposing the pre-finished product in impregnation liquid II, decomposing in a protective atmosphere after impregnation is completed, polishing after decomposing, and repeating impregnating-decomposing-polishing operations until a carbon / ceramic composite material finished product of 1.93-2.0 g / cm3 is obtained.

Sub-boundary-layer-scale ramp-like vortex generators that can be mounted on any surface such as the wing of an airplane, the inlet to a propulsion system, the hull of a ship, or any other surface over which a fluid moves, when the objective is to minimize drag, irreversibility losses, or other performance penalties that can occur for reasons such as boundary layer separation or other undesirable boundary layer properties. The disclosed devices acts to passively induce streamwise vortices in the boundary layer, thereby transferring high-momentum fluid toward the surface in such a way as to alter the shape of the velocity profile within the boundary layer and thereby avoid or delay separation or alter other properties of the boundary layer.

Channel apparatus for use with submerged combustion systems and methods of use to produce glass. One channel apparatus includes a flow channel defined by a floor, a roof, and a wall structure connecting the floor and roof, the flow channel divided into sections by a series of skimmers. Channel apparatus include both high and low momentum combustion burners, with one or more high momentum combustion burners positioned immediately upstream of each skimmer in either the roof or sidewall structure, or both, and one or more low momentum combustion burners positioned immediately downstream of each skimmer in either the roof, the sidewall structure, or both, and positioned to transfer heat to the molten mass of glass without substantial interference from foamed material. Certain embodiments include increased height of glass-contact refractory, in particular immediately upstream of the skimmers.

A vapor-liquid contact tray apparatus having a tray with a fluid infeed section and a fluid travel section together with downcomer which is in fluid communication with the fluid travel section of the tray. A redirecting baffle is positioned at an inlet opening of the downcomer and push valves are provided in the fluid travel section of the tray. The push valves are preferably arranged in one or more zones of high concentration of push valves relative to one or more bubbling aperture zones with a lower concentration of push valves or no push valves. The redirecting baffle is provided in the downcomer and extends above the tray to capture fluid flowing horizontally off of the tray (e.g., exiting from a weirless or weir interface) and into a preferably concave upper portion of the redirecting baffle for controlling and redirecting the high momentum flow into and through the downcomer. A plurality of redirecting baffles are featured in one embodiment together with apertured straight sections extending down into the downcomer as in down to the half way mark of downcomer depth or further down including out of the bottom of downcomer.

Sub-boundary-layer-scale ramp-like vortex generators that can be mounted on any surface such as the wing of an airplane, the inlet to a propulsion system, the hull of a ship, or any other surface over which a fluid moves, when the objective is to minimize drag, irreversibility losses, or other performance penalties that can occur for reasons such as boundary layer separation or other undesirable boundary layer properties. The disclosed devices acts to passively induce streamwise vortices in the boundary layer, thereby transferring high-momentum fluid toward the surface in such a way as to alter the shape of the velocity profile within the boundary layer and thereby avoid or delay separation or alter other properties of the boundary layer.

Disclosed is a manufactured three-dimensional convex-concave fairing with attached vortex generators, for hydraulic structures such as bridge piers and abutments, whose shape prevents the local scour problem around such hydraulic structures. The device is a conventionally made concrete or fiber-reinforced composite, or combination of both, vortex generator equipped hydrodynamic fairing that is fit or cast over an existing or new hydraulic structure around the base of the structure and above the footing. The vortex generators are positioned so as to energize decelerating near wall flow with higher-momentum outer layer flow. The result is a more steady, compact separation and wake and substantially mitigated scour inducing vortical flow.

The embodiment of the invention relates to a novel positron annihilation spectrometer and a measurement method thereof. The novel positron annihilation spectrometer comprises a radioactive source, a collimator, a detector module and an image obtaining and processing unit, wherein the radioactive source generates positive electron, and the collimator is arranged at the front end of the detector module; the detector module comprises a scintillator, an optical module and a streak tube unit; and the image obtaining and processing unit reads space information recorded by the streak tube unit, obtains the position and amplitude information of gamma rays incident to the detector module according to the space information, respectively obtains the position and amplitude information of gamma rays of a start signal and two termination signals, and further obtains the annihilation life information of positron generated by the radioactive source and the energy information of the gamma rays. The positron annihilation spectrometer can realize the coincidence measurement of high momentum resolution and high time resolution positron annihilation information at the same time and is significantly increased on aspects of momentum resolution, time resolution, testing speed and the like.

Centrifugal turbomachines, such a centrifugal compressors, centrifugal blower, and centrifugal pumps, having unique treatments that enhance their performance ranges. In one arrangement, the treatment involves injecting a relatively high-momentum flow proximate to the blade-tip clearance gap at the inlet to the impeller of the turbomachine in a manner that reenergizes flow at the gap. The injected high-momentum flow can be taken from a location downstream of the outlet of the impeller and / or from a flow external to the turbomachine. In another arrangement, the non-self-bleed-type treatment involves providing the centrifugal turbomachine with a secondary flow path upstream of the inlet to the impeller. In one example, the flow of working fluid to the secondary flow path is modulated according to the mass flow of the working fluid. During times of higher flow, the secondary flow path is opened, and at times of lower flow, the secondary flow path is closed.

The invention provides a reinforced micro-reaction device for preparing micro-nanometer powder, a micro-reaction system and a preparation method of the micro-nanometer powder. The micro-reaction system comprises a feeding device, a micro-fixing device, the reinforced micro-reaction device and a storage chute; the reinforced micro-reaction device comprises a pipe and an ultrasonic generator; the pipe comprises a central passage with size increasing gradually; and the ultrasonic generator is arranged outside the central passage. The micro-reaction system has the advantages of being rapid in mixing speed, strong in mass transfer capability, low in energy consumption, easy for amplification and strong in operation control, effectively preventing the blockage of micro-reaction passages and the agglomeration of nanometer particles and the like. In the preparation method, the two processes of mixing and reaction are divided and can be respectively carried out in the micro-mixing device and the reinforced micro-reaction device so that the low-cost, high-efficiency, stable-performance and controllable-quality continuous production of the micro-nanometer powder is realized. The device, the system and the method are particularly suitable for the industrial production of chemical liquid-phase reaction with rapid reaction speed and high momentum, energy and quality transfer requirements and having solid generated.

Cooling systems and the methods of cooling filaments using the cooling systems are disclosed. One embodiment of the cooling system includes a layer of nozzles that spray air on the filaments above a pre-pad water spray. Alternatively, another cooling system utilizes air-atomizing nozzles to spray a mixture of air and water on the filaments. The cooling systems provide an improved distribution of cooling fluid particulars to enhance the cooling of the filaments. The sprays from the nozzles have a higher momentum and are able to penetrate deeper into a filament fan than conventional cooling systems. The results are an improved temperature uniformity among the filaments and an overall reduction in temperature of the filaments prior to the application of size material.

A method and apparatus for scavenging lubricant is disclosed herein. In the invention, a rotating structure is encircled within a sump housing and subjected to lubrication. The sump housing collects high-momentum lubricant flow and low-momentum lubricant flow. The interior of the sump housing is separated into a plurality of chambers with at least one dynamic seal. The at least one dynamic seal extends between the sump housing and the rotating structure to isolate the high-momentum lubricant flow from the low-momentum lubricant flow.

A full-mixing overfire air device of a W-shaped flame boiler relates to an overfire air device of a boiler. The invention aims to solve the problems of the prior W-shaped flame boiler adopting overfire air nozzles in direct flow structure form, such as higher carbon content in fly ash resulting from the fact that the gas and pulverized coal in the jet flow of the conventional boiler are unlikely to be mixed with those between adjacent jet flows due to the poor lateral diffusion capacity. The higher carbon content in the ash can lower the heat efficiency of the boiler and increase coal consumption of power plants. One end of an outer air channel of the overfire air device is fixed on the outer side wall of an upper furnace at an overfire air nozzle, wherein the overfire air accounts for 25 to 30% of the total amount of air fed into the boiler. The overfire air is divided into two portions when entering the overfire air channel, one portion enters an inner air channel and is ejected to the furnace to achieve higher momentum, and the other portion enters the outer air channel to achieve higher rotation intensity, so that the two portions of the overfire air can achieve higher lateral diffusion capacity when entering the upper furnace and can be mixed with gas between two adjacent portions of the overfire air jet flow.

An oxy-fuel furnace and method of heating material in an oxy-fuel furnace are disclosed. The method includes combusting oxygen and fuel with an oxy-fuel burner arrangement in the oxy-fuel furnace forming combustion gases, and maintaining a vortex including the combustion gases within a central region of an enclosure of the oxy-fuel furnace. The oxy-fuel burner arrangement includes a plurality of high momentum oxy-fuel burners arranged at an angle to generate the vortex, the angle being greater than 15 degrees but less than 75 degrees with respect to a furnace wall boundary of the enclosure, an angular velocity of greater than 0.07 radians per second, or a combination thereof. The furnace includes an oxy-fuel burner arrangement including at least two high momentum oxy-fuel burners having high shape factor nozzle geometries, and an enclosure. The vortex increases convective heating within the enclosure and uniformity of heating within the enclosure.

The invention discloses a vortex pump with a separation net for enhancing self-absorption. The vortex pump comprises a vortex pump body and the separation net. The separation net is arranged in a gas-liquid separation chamber with the set angle A and the set area S. The separation net conducts effective gas-liquid separation on gas and liquid two-phase flow, flowing back to the area near an impeller, in the gas-liquid separation chamber, and meanwhile rectification, deceleration and pressurization are conducted on backflow fluid. The separation net in the vortex pump can enhance gas-liquid separation in the gas-liquid separation chamber, bubble floating is accelerated, descending of bubbles along with downward fluid is relieved, and the exhaust efficiency and the exhaust speed of limited space of the gas-liquid separation chamber are greatly improved; through isolation and separation of bubbles at the upper position in the gas-liquid separation chamber, it is ensured that the gas content of fluid flowing back to a water absorbing chamber along with rotation of the impeller is lower, higher momentum and pressure potential energy are achieved, and the mixing volume rate and the mixing speed for gas in a pipeline at an inlet section of the pump in the water absorbing chamber are improved.

An air inlet for a flight vehicle engine includes at least one fin, at least partially upstream of a throat of the engine. The fin protrudes into a flow channel, extending beyond a boundary layer into the main airstream in the inlet. The fin causes mixing in the flow, bringing high-momentum flow into areas of the flow channel containing low-momentum flow by aggregating the boundary layer and causing it to lift from the surface. The fin may have a width and / or height that varies along its length in the flow direction, which may allow it to shape the flow around it in predictable ways, without resulting in excessive drag.

The embodiment of the invention relates to a novel positron annihilation spectrometer and a measurement method thereof. The novel positron annihilation spectrometer comprises a radioactive source, a collimator, a detector module and an image obtaining and processing unit, wherein the radioactive source generates positive electron, and the collimator is arranged at the front end of the detector module; the detector module comprises a scintillator, an optical module and a streak tube unit; and the image obtaining and processing unit reads space information recorded by the streak tube unit, obtains the position and amplitude information of gamma rays incident to the detector module according to the space information, respectively obtains the position and amplitude information of gamma rays of a start signal and two termination signals, and further obtains the annihilation life information of positron generated by the radioactive source and the energy information of the gamma rays. The positron annihilation spectrometer can realize the coincidence measurement of high momentum resolution and high time resolution positron annihilation information at the same time and is significantly increased on aspects of momentum resolution, time resolution, testing speed and the like.

The invention provides a single-fluid water mist type water curtain shower nozzle, belonging to the technical field of fire-fighting equipment and safety protection. The single-fluid water mist type water curtain shower nozzle comprises a shower nozzle base, a filter screen, a rubber washer, a shower nozzle parent body, a spray nozzle and a rotational flow body; the shower nozzle base is connected with the shower nozzle parent body, and the filter screen is arranged between the shower nozzle base and the shower nozzle parent body; the rubber washer is placed within a washer groove of the shower nozzle parent body, and the filter screen and the rubber washer are fixedly arranged between the shower nozzle base and the shower nozzle parent body when the shower nozzle base is connected with the shower nozzle parent body, so that the functions of impurity filtering and sealing can be achieved; the rotational flow body is connected into a cavity of the spray nozzle, the spray nozzle is fixedly connected onto the shower nozzle parent body to form a water mist water curtain shower nozzle, and the spray nozzle is communicated with the cavity in the shower nozzle parent body. After the single-fluid water mist type water curtain shower nozzle is used, the water consumption can be greatly reduced, and the fire ground is very small in water damage loss. According to the dense waster mist and the high-momentum waster mist liquid drop, the heat energy of the fire smoke can be greatly reduced, the diffusing and spreading speed of the fire smoke can be slowed down, and the shower nozzle plays good roles in smoke resistance and heat insulation.

The invention provides a pipe inner wall polishing method. A polishing fluid is injected in a petroleum elbow pipe which is clamped and fixed; a steel rope is connected with a lifting lug; under the drive of a traction device, a polishing mechanism enters the elbow pipe; the polishing fluid flows out rapidly from the gap between the polishing mechanism and the elbow pipe inner wall; the polishing fluid works on the pipe wall and the high speed movement of abrasive particles can cut and remove corners or protrusions on the elbow pipe inner wall; the flowing polishing fluid drives an impeller to rotate freely and the impeller can jet part of the polishing fluid to the pipe wall through rotation; when the polishing fluid hits the pipe wall, scrap iron falling off from the pipe wall is cleaned; two oppositely arranged protection shells can support and protect the impeller during rapid flow of the polishing fluid; flow holes are formed in the protection shells symmetrically and the polishing fluid quickly enters an expanded section; after flowing through a straight and flat section, the speed of the polishing fluid further increases, so that the polishing fluid has a higher momentum when entering the area where the impeller is located.

A full-mixing overfire air device of a W-shaped flame boiler relates to an overfire air device of a boiler. The invention aims to solve the problems of the prior W-shaped flame boiler adopting overfire air nozzles in direct flow structure form, such as higher carbon content in fly ash resulting from the fact that the gas and pulverized coal in the jet flow of the conventional boiler are unlikely to be mixed with those between adjacent jet flows due to the poor lateral diffusion capacity. The higher carbon content in the ash can lower the heat efficiency of the boiler and increase coal consumption of power plants. One end of an outer air channel of the overfire air device is fixed on the outer side wall of an upper furnace at an overfire air nozzle, wherein the overfire air accounts for 25to 30% of the total amount of air fed into the boiler. The overfire air is divided into two portions when entering the overfire air channel, one portion enters an inner air channel and is ejected to the furnace to achieve higher momentum, and the other portion enters the outer air channel to achieve higher rotation intensity, so that the two portions of the overfire air can achieve higher lateraldiffusion capacity when entering the upper furnace and can be mixed with gas between two adjacent portions of the overfire air jet flow.

According to embodiments of the invention, an impeller includes a hub, and a plurality of radial blades for drawing the air inflow axially through the hub and delivering the drawn air radially towards the outside. A ring is attached to one or more tips of the plurality of radial blades to block a portion of the tip toward the inlet side of the impeller. The preferred blockage factor, which is the ratio of a height of the ring to a height of the tip, is approximately in a range between 30% and 40%. By blocking a portion of the tip toward the inlet side of the impeller, the low-momentum flow zone toward the inlet side of impeller is blocked, while the high-momentum flow zone toward the back side of impeller is enhanced. As such, the performance of the impeller is enhanced.

The invention provides a reinforced micro-reaction device for preparing micro-nanometer powder, a micro-reaction system and a preparation method of the micro-nanometer powder. The micro-reaction system comprises a feeding device, a micro-fixing device, the reinforced micro-reaction device and a storage chute; the reinforced micro-reaction device comprises a pipe and an ultrasonic generator; the pipe comprises a central passage with size increasing gradually; and the ultrasonic generator is arranged outside the central passage. The micro-reaction system has the advantages of being rapid in mixing speed, strong in mass transfer capability, low in energy consumption, easy for amplification and strong in operation control, effectively preventing the blockage of micro-reaction passages and the agglomeration of nanometer particles and the like. In the preparation method, the two processes of mixing and reaction are divided and can be respectively carried out in the micro-mixing device and the reinforced micro-reaction device so that the low-cost, high-efficiency, stable-performance and controllable-quality continuous production of the micro-nanometer powder is realized. The device, the system and the method are particularly suitable for the industrial production of chemical liquid-phase reaction with rapid reaction speed and high momentum, energy and quality transfer requirements and having solid generated.

The invention provides a power device. The power device comprises a propeller, a duct and a driving unit. The propeller is rotatably installed in the duct, and the driving unit drives the propeller torotate. The inner wall of the duct is of a conical structure; the propeller is mounted in the duct in a sliding manner; and the sliding control device drives the propeller to slide along the rotatingaxis. The sliding control device drives the propeller to slide, and the thrust output of the duct can be adjusted by adjusting the propeller duct gap between the blade tip of the blade and the conical inner wall of the duct. The motor does not need to control power output of the power device through large-amplitude frequent acceleration and deceleration, thereby effectively reducing motor rotating speed fluctuation amplitude, reducing motor load and prolonging service life of the motor. The working efficiency of the power device is improved.