Abstract: The present disclosure provides an ejector nozzle and an ejector including the same. The ejector nozzle includes a first tube having a first flow path into which a fluid is introduced, and a second tube provided outside the first tube and having an inner diameter larger than an inner diameter of the first tube, the second tube defining a second flow path between the first tube and the second tube, in which the first tube further includes a communication port that penetrates the first tube to allow the first flow path to communicate with the second flow path and is openably and closable provided, and in which when the communication port is opened, a part of the fluid flowing in the first flow path is allowed to flow along the second flow path.

Abstract: A jet valve includes a valve body, a juncture operatively coupled to the valve body. The juncture having a first fluid connection fluidly coupled to a header tank and a second connection fluidly coupled to a storage tank. A spool is movably disposed within the valve body. A jet pump is fluidly coupled to a fuel pump of the header tank via a bleed line. Operation of the fuel pump pressurizes the bleed line and moves the spool to a first position to (i) close a first fluid path between the header tank and the storage tank and (ii) provide a second fluid path between the header tank and the storage tank, the second fluid path through the aperture. Depressurization of the bleed line enables the spring to move the spool to a second position to close the second fluid path and open the first fluid path.

Abstract: An ejector has: a motive flow inlet; a secondary flow inlet; an outlet; a motive nozzle; a diffuser; and a control needle shiftable between a first position and a second position. The ejector comprises: an inlet body bearing the motive flow inlet and the secondary flow inlet; a diffuser body forming the diffuser and bearing the outlet; a motive nozzle insert forming the motive nozzle in a compartment in the inlet body; and a needle guide insert in the motive nozzle insert.

Abstract: A multi-stage ejector is provided for producing vacuums in an industrial process and includes at least two ejector units axially arranged at a predetermined distance apart in an ejector housing. Each of the at least two ejector units includes at least two parallelly arranged hollow feed-throughs for compressed air, including inlet and outlet nozzles and at least one hollow feed-through for vacuum. Each of the at least two ejector units is configured as a part produced from one piece.

Abstract: The present disclosure provides a recirculation device comprising a body comprising at least one first passage configured to receive an exhaust, at least one second passage configured to receive a fuel, at least one third passage configured to receive a mixture of the exhaust and the fuel, and a longitudinal axis extending from the second passage to the third passage. The device can also comprise a nozzle comprising an inner cavity for directing fuel towards an orifice, located at the smallest cross-sectional area of the inner cavity and a piston slideably located within the body comprising a first end configured to receive the fuel and a second end configured to fuel to the nozzle cavity, whereby the piston can be actuated along the longitudinal axis of the body by the exhaust controlling the flow of fuel passing through the orifice. A mixing chamber located within the body can be configured to receive an exhaust and configured to receive fuel from the orifice.

Abstract: The present disclosure provides a recirculation device comprising a body comprising at least one first passage configured to receive an exhaust, at least one second passage configured to receive a fuel, at least one third passage configured to receive a mixture of the exhaust and the fuel, and a longitudinal axis extending from the second passage to the third passage. The device can also comprise a nozzle comprising an inner cavity for directing fuel towards an orifice, located at the smallest cross-sectional area of the inner cavity and a piston slideably located within the body comprising a first end configured to receive the fuel and a second end configured to fuel to the nozzle cavity, whereby the piston can be actuated along the longitudinal axis of the body by the exhaust controlling the flow of fuel passing through the orifice. A mixing chamber located within the body can be configured to receive an exhaust and configured to receive fuel from the orifice.

Abstract: A multiphase ejector including a housing space with a first inlet opening, connectable to a first fluid source, a second inlet opening, connectable to a second fluid source, and an outlet opening. A bush inside the housing space includes a channel having a first opening connected to the first inlet opening and a second opening connected to the second inlet opening and the outlet opening. A member inside the space mixes the fluids and demlimits a channel with a first opening connected to the second opening of the channel and to the second inlet opening, and a second opening connected to the outlet opening. A restriction associated with the bush adjusts the flow-rate of the first fluid in the second opening of the channel. The restriction can be moved between a position of an area having a maximum amplitude, and a position of the second opening being blocked.

Abstract: Various embodiments provide a mechanism to allow end users to install web applications and websites onto their desktop. In accordance with one or more embodiments, client-side code can be utilized to allow developers associated with a website to define boundaries associated with user interaction, and have those boundaries enforced by a run-time engine. In at least some embodiments, developers can provide, through JavaScript code and/or HTML markup, various configurations for the creation of a start menu shortcut, navigation, and so-called jumplist integration.

Abstract: A fan assembly includes a nozzle and a system for creating a primary air flow through the nozzle. The nozzle includes at least one outlet for emitting the primary air flow, and defines an opening through which a secondary air flow from outside the fan assembly is drawn by the emitted primary air flow and which combines with the primary air flow to produce a combined air flow. The nozzle includes a user operable device for allowing a user to adjust selectively at least one parameter, for example at least one of the profile, the orientation and the direction, of the combined air flow.

Abstract: A fan assembly includes a nozzle and a system for creating a primary air flow through the nozzle. The nozzle includes an outlet for emitting the primary air flow, and defines an opening through which a secondary air flow from outside the fan assembly is drawn by the primary air flow emitted from the outlet. To allow a parameter of an air flow, formed from the combination of the primary and secondary air flows, to be adjusted by a user, the nozzle has an adjustable configuration.

Abstract: A supersonic ejector assembly may include a housing manufactured from a solid piece of material, a first ejector assembly positioned in a first bore formed in the housing and secured therein by a first input side flange positioned over an input end of the first bore and an output side flange positioned over an output end of the first bore, and a second ejector assembly positioned in a second bore formed in the housing and secured therein by a second input side flange positioned over an input end of the second bore, the second bore terminating into the first bore proximate a suction input of the first ejector assembly.

Abstract: A modular ejector pump (1) for a fuel delivery device (39). The ejector pump (1) has a feed line (3) and a first nozzle (7). The feed line (3) is embodied to supply fuel (27) to the first nozzle (7). The ejector pump (1) furthermore has a second nozzle (9), which is arranged parallel to the first nozzle (7). The feed line (3) is embodied to supply fuel (27) to the second nozzle (9).

Abstract: An ejector and a fuel cell system using the ejector which can improve a control of an ejection pressure of a fluid. The ejector 50 includes a body 60, a nozzle 80, a needle 70, a diffuser 90 which sucks a second fluid by a negative pressure generated by a first fluid ejected from the nozzle 80, and a first, a second and a third diaphragms 100, 110, 120 which are movable in the axial direction against the needle 70. The first diaphragm 100 and the second diaphragm 110 have the same effective area, and an effective area of the third diaphragm 120 is different from those of the first diaphragm 100 and the second diaphragm 110.

Abstract: An ejector comprises a body, a nozzle, a needle, a diffuser which draws in a second fluid using negative pressure caused by ejection of a first fluid from the nozzle and mixes the first and second fluids together, first and second diaphragms which allows the nozzle to shift in an axial direction with respect to the needle, and a first fluid chamber which is supplied with the first fluid. A valve in which a valve body contacts and separates from a valve seat according to the shifting action of the nozzle is formed by providing either the nozzle or the needle with the valve body and providing the other with the valve seat in the first fluid chamber. A back pressure chamber connecting to the first fluid chamber via the valve is provided between a trunk portion of the nozzle and a basal part of the needle.

Abstract: There is provided a liquid supply method in which, when preparing a solution that can be used as washing water and the like by supplying a minute amount of chemicals and the like to ultrapure water, the amount of supply solution that is supplied can be accurately determined. In this liquid supply method, a solution is prepared by supplying a supply liquid to a primary fluid that is circulating in a primary fluid circulation tube (2). This liquid supply method uses a liquid supply apparatus (1) that includes: a supply section (3) that delivers the supply liquid; and a supply liquid circulation tube (4) that causes the supply liquid to flow from the supply section (3) to the primary fluid circulation tube (2), the internal diameter of the supply liquid circulation tube (4) being between 0.01 and 1 mm.

Abstract: An ejector is provided with a first fluid chamber into which hydrogen gas is introduced; a rod-shaped needle; a nozzle exhausting hydrogen gas introduced into the first fluid chamber from an exhaust port; a second fluid chamber into which hydrogen off-gas is introduced; a diffuser provided at the exhaust port of the nozzle; and a third fluid chamber into which air is introduced. The first fluid chamber is provided between the second fluid chamber and the third fluid chamber. The first diaphragm 65 separates the first fluid chamber and the second fluid chamber and the second diaphragm separates the first chamber and the third fluid chamber. Then, the needle and the nozzle moves to approach each other by the pressure of air introduced into the third fluid chamber and isolate each other by the pressure of hydrogen off-gas introduced into the second fluid chamber.

Abstract: Systems, methods and media for generating fluid flow in an algae cultivation pond are disclosed. Circulation of fluid in the algae cultivation pond is initiated via at least one jet. The circulation of fluid generates a velocity of fluid flow of at least ten centimeters per second in the algae cultivation pond. A head is provided to the at least one jet that overcomes a head loss associated with the velocity of fluid flow of at least ten centimeters per second in the algae cultivation pond.

Abstract: A novel pressure-exchange ejector is disclosed whereby a high energy primary fluid transports and pressurizes a lower energy secondary fluid through direct fluid-fluid momentum exchange. The pressure-exchange ejector utilizes non-steady flow principles and both supersonic flow and subsonic flow embodiments are disclosed. The invention provides an ejector-compressor/pump which can attain substantially higher adiabatic efficiencies than conventional ejectors while retaining much of the simplicity of construction and the low manufacturing cost of a conventional ejector. Embodiments are shown which are appropriate for gas compression applications such as are found in ejector refrigeration, fuel cell pressurization, water desalinization, and power generation topping cycles, and for liquid pumping applications such as marine jet propulsion and slurry pumping.

Abstract: The vacuum generator is capable of quickly and securely holding and releasing a work piece and capable of reducing amount of consuming compressed air. In the vacuum generator, a first nozzle and a second nozzle jet compressed air toward a diffuser nozzle. The second nozzle has a diameter greater than that of the first nozzle. Switching means switches a state of the vacuum generator between a first state, in which a small amount of air sucked from the vacuum port, and a second state, in which a large amount of air is sucked from the vacuum port. The first nozzle, the second nozzle and the diffuser nozzle are serially arranged in that order.

Abstract: A system and method for improving cooling of a heat-generating component in a closed-loop cooling system is shown. The system comprises a venturi having a throat which is coupled to an expansion tank that is exposed to atmospheric pressure in the embodiment being described. The venturi, when used with a pressure switch, can operate to determine a flow rate which can be used to generate a signal which in turn is used to activate or deactivate one or more of the components, such as the heat-generating component, in the system. Also shown is another embodiment wherein a circular venturi is provided to permit a venturi passageway to be defined about an axis of the pump in order to shorten the overall length of the pump and venturi combination.

Abstract: A multi-stage ejector pump having an ejector nozzle system with the nozzles situated coaxially behind each other and axially set apart from each other by a spaced distance. The ejector a nozzle system is made up of a set of individual nozzles and nozzle spacers. The ejector nozzle system can be sealingly pushed into a nozzle-receiving shaft of a housing element. The housing wall is interrupted in the area between adjacent nozzles to provide a fluid connection to suction chambers. Each individual nozzle is provided with support elements on its outer periphery. The support elements are axially set apart and provide tilt-free or low-tilt support in relation to the wall of the nozzle-receiving shaft. The aim of the invention is to provide a multi-stage ejector pump which has compact construction, interchangeable nozzles and a high degree of efficiency.

Abstract: A self-compensating, energy saving heat transfer unit to provide an efficient means to transfer energy from steam to water in a central heating system. The steam enters a mixing chamber and creates a negative pressure environment. Water in a backwater pipe, which is at a lower temperature and pressure, is absorbed into the mixing chamber where energy is passed from the steam to the water. The water then leaves the first mixing chamber and enters a second mixing chamber where compensation water is added to make up for the possible loss of water that may occur in the central heating system. The heated water then exits the heat transfer unit and goes back into the central heating system. After being cooled in the central heating system, the water then reenters the heat transfer unit at the backwater pipe and continues the cycle over again.

Abstract: A novel pressure-exchange compressor-expander is disclosed whereby a high energy primary fluid compresses a lower energy secondary fluid through direct fluid-fluid momentum exchange. The pressure-exchange compressor-expander utilizes non-steady flow principles and supersonic flow principles to obtain an ejector-compressor which can attain high adiabatic efficiencies while having a simplicity of construction, small size and weight, and the low manufacturing cost. This disclosure includes a fuel-cell pressurization system and humidity control system utilizing the pressure-exchange compressor-expander. The disclosure includes a novel turbo-charger for internal combustion engines incorporating exhaust gas recirculation capabilities. Further, an air-cycle heat pump suitable for aircraft applications is disclosed utilizing the pressure-exchange compressor-expander.

Abstract: A jet pump assembly 10 for use in a subterranean wellbore 82 to lift produced fluids 72 to the surface, comprising a fixed type jet pump assembly 10 including a retrievable insert assembly 30 for retrieving substantially all working components of the jet pump assembly 10 which may be subject to wear or size change, including retrieving the standing valve assembly in the production intake section 50, and having a power section 40 which is reversible such that the same components may be used for operating the jet pump assembly 10 in “normal” circulation or “reverse” circulation. Included is an embodiment of a jet pump assembly 10 providing at least one pressure sensor 90 and at least one temperature sensor 92 built into the through bore of the retrievable insert section 30 for monitoring fluid pressure and temperature in the through bore of the jet pump assembly 10 and thereby improving operational efficiency of the jet pump assembly 10.

Abstract: A heat dissipation fan has a casing, a stator fixedly received in the casing, a sleeve with a central hole securely attached to the stator, a lubricating bearing with lubrication oil contained therein mounted in the sleeve, a fan rotatably mounted in the casing and having a magnet mounted therein to be a rotor, a shaft extending from the fan and securely received in the lubricating bearing and a locking disk securely mounted on the shaft to lock the lubricating bearing on said shaft. The lubricating bearing has a central hole defined therein, a chamber defined in the bottom end of said bearing and at least one oil groove longitudinally defined in the outer periphery of said bearing. This can lubricate the shaft and guide the lubrication oil to avoid noise and oil from leaking from the sleeve and drying out the bearing. Consequently, the useful life of the heat dissipation fan will be increased.

Abstract: A novel pressure-exchange ejector is disclosed whereby a high energy primary fluid compresses a lower energy secondary fluid through direct fluid-fluid momentum exchange. The pressure-exchange ejector utilizes non-steady flow principles and supersonic flow principles to obtain an ejector-compressor which can attain substantially higher adiabatic efficiencies than conventional ejectors while retaining much of the simplicity of construction and the low manufacturing cost of a conventional ejector. By virtue of the capabilities of the ejector to compress high volumes of secondary fluid, an ejector refrigeration system utilizing water and other environmentally benign refrigerants is disclosed.

Abstract: Pumping method by direct energy exchange during which a drive fluid is sent intermittently in the form of one or more jets into a primary fluid.Pumping device comprising a hollow part (2) and a distributing part, each provided with orifices (Oi) and (Ei). A rotationally movable part (6) is interposed between the hollow part and the distributing part, and fitted with a blocking means in order to generate Jets of drive fluid intermittently toward a fluid to be transported.

Abstract: A pumping method for effecting direct energy exchange between a drive fluid and a primary fluid in a pipe wherein a plurality of fluid jets are produced from a static distributing part having at least one first orifice by causing a movable part having at least one means for blocking said at least one first orifice to rotate such that the plurality of fluid jets are sent intermittently as liquid pistons into the primary fluid located at a common meeting space positioned downstream of the static distributing part whereby the plurality of liquid pistons pump the primary fluid through said pipe.

Abstract: Pumping device for effecting direct energy exchange between a drive fluid and a primary fluid. The device has, in combination, a hollow static part allowing the drive fluid to pass, which static hollow part has at least one orifice and a distributing part having at least one opening the distributing part is located relative to the static hollow part to allow the drive fluid to pass from an orifice to an orifice, the distributing parts and the static part are joined by a connecting and sealing part, and a movable part is disposed in the space formed by the static hollow part, the distributing part, and the connecting part. The movable part has at least one means allowing orifices to be blocked, so that at least part of said drive fluid is ejected toward the primary fluid when the movable part rotates.

Abstract: A jet pump having a rotatable venturi cartridge to permit any of several different sized venturi tubes to be aligned with a nozzle in the pump casing. A knob is provided on the pump casing to permit convenient rotation of the venturi cartridge. Printed indicia on the knob align with an indicator arrow to visually indicate the setting of the knob.

Abstract: A skimmer for skimming water from a swimming pool or spa is provided with entraining means for entraining additional water from the pool or spa to thereby increase the flow of water into and out of the skimmer. The entraining means includes two nozzle members which cooperate with each other to jet an entraining stream of water through the skimmer. The skimmer is also provided with isolating means for isolating the entraining stream of water from the rest of the water flowing through the skimmer. The isolating means includes actuating means for selectively actuating and deactuating the isolating means such that the skimmer can be operated at a normal flow rate when the isolating means is actuated and at an increased flow rate when the isolating means is deactuated.

Abstract: A hydrokinetic amplifier 10 uses liquid and vapor input nozzles 11 and 12 discharging into an acceleration chamber 13 downstream from which a diverging diffuser 15 extends. Liquid nozzle 11 forms a free liquid jet 20 that extends for a substantial distance through acceleration chamber 13, and vapor flowing at a much higher speed into acceleration chamber 13 surrounds, impinges on, and condenses into free liquid jet 20. Collapse of the condensing vapor forms a suction into which more vapor flows. Acceleration chamber 13 gradually converges from an ingress region 14 receiving liquid and vapor to an egress region 16 flowing mostly liquid into diffuser 15. Vapor nozzle 12 has a throat region 12a arranged upstream of the discharge region 21 of liquid nozzle 11 and an expanding region 12b extending from throat region 12a downstream toward ingress region 14 of acceleration chamber 13 so that vapor is expanding when it contacts the liquid.

Abstract: An eductor pump for withdrawing a feed liquid from a container, comprising a tubular body having a venturi element mounted inside and near the lower end of the tubular body; a conduit for feeding a drive liquid to the venturi element so that the drive liquid can flow through the venturi element and be directed upwardly in the tubular body; a feed liquid access opening in the closed lower end of the tubular body and a passageway from said access opening to the upstream side of the venturi element whereby feed liquid can be inspirated into upward flow, and admixture with, a stream of drive liquid flowing out of the venturi element; an outlet to remove a mixed stream of feed liquid and drive liquid from the upper part of the tubular body; and a one way valve mounted in the feed liquid access opening.

Abstract: There is provided an in-line, two-stage, variable-bypass injector pump for controllably admixing a secondary fluid to a main fluid. The pump comprises a housing connectable into a pipe line carrying the main fluid and a main venturi extending along the central axis of the housing having an entrance and a throat and exit portion. The pump also includes a secondary venturi off center but substantially parallel to the central axis. The exit portion of the secondary venturi leads into the throat portion of the main venturi. One end of a connector leads into the throat portion of the secondary venturi and the other end of the connector is connectable to a source of the secondary fluid. An eccentrically located passage way permits a variable proportion of the main fluid to flow from one end of the housing to the other end thereof, while bypassing the main venturi. The bypassed flow is controlled by means of a shutter between a maximum and zero flow.

Abstract: A gas-lift device having upper and lower adapting members formed with throughgoing axial bores for the incorporation of the device in a well string, the adapting members being joined by a sleeve containing a profiled member, having an axial throughgoing bore, locked therein in juxtaposition with a profiled ring threaded onto the upper adapting member, the ring having an inner diameter less than that of the axial bore of the upper adapting member, so that an inwardly extending annular ledge is formed by the ring and an annular slot is defined between the annular ledge and the juxtaposed profiled member, the combination of annular ledge, annular slot and profiled member forming an upwardly directed turbulence nozzle, supplied with pressurized gas from a chamber formed in the sleeve.

Abstract: The invention refers to a device for the continuous gas-lift exploitation of petroleum deposits by means of a depression effect and of a gas-dynamic pulverization. The device according to the invention, consists of a cylindrical adapting piece in which a threaded sleeve is screwed, coupled, in its turn, with a male union provided at its upper end with a profiled wall which, together with the cylindrical adapting piece, shapes a straight depressionary baffle, the profiled part having a curved profiled wall which, together with the profiled wall of the male union, shapes a peripherical annular slot. The nozzle consists of the baffle and slot whose dimensions can be modified as a function of the production depth by dimensionally modifying the profiled part. The slot communicates with an equalization chamber, circumferentially provided with some apertures for the supply of lift gases. Erosion reduction of parts is achieved by means of a protective coating of metallic oxides.