Abstract: A jet pump (10) comprising a tubular body (12), a first injection duct (14) which opens into the body (12) via a first outlet nozzle (18), a second injection duct (16) which opens into the body (12) via a second outlet nozzle (20) which surrounds the first outlet nozzle (18), the downstream end (20a) of the second outlet nozzle (20) being situated axially level with the downstream end (18a) of the first outlet nozzle (18), wherein the upstream end (18b) of the first nozzle (18) comprises an axial orifice (30) centered on the main axis of the body (12), and in that the jet pump (10) is configured for either plugging or not plugging the axial orifice (30) of the first outlet nozzle (18).

Abstract: An ejector for a vapor compression system using a swirl flow includes an ejector body comprising a main inlet into which a main flow in high pressure flows, a nozzle section in fluid communication with the main inlet, a mixing portion in fluid communication with the nozzle section, a diffuser in fluid communication with the mixing portion, and a discharge portion in fluid communication with the diffuser. A suction pipe is inserted in a center of the ejector body and includes a through-hole into which a suction flow in low pressure flows and a leading end portion of an outer surface of the pipe forms a plurality of inclined passages with the nozzle section of the ejector body. These passages allow the main flow to be moved to the mixing portion so as to form a swirl flow between the main flow and suction flow when mixed in the ejector.

Abstract: A system and method to minimize flow induced vibration in a gas turbine exhaust is provided. The system includes a turbine exhaust manifold connected to a turbine exhaust cylinder establishing a fluid flow path, the fluid flow path bounded radially outward by an outer cylindrical surface and bounded radially inward by an inner cylindrical surface. At least one tangential strut is arranged between the outer cylindrical surface and the inner cylindrical surface. A first flap is arranged diagonally between the tangential strut and the outer cylindrical surface or the inner cylindrical surface where the first flap minimizes vortex shedding of the fluid flow from the tangential strut.

Abstract: Systems and methods for natural gas liquefaction capacity augmentation using supplemental cooling systems and methods to improve the efficiency of a liquefaction cycle for producing liquefied natural gas (LNG).

Abstract: A supplementary injection device is installed in a nuclear power plant to draw coolant and inject coolant using an entraining fluid. The injection device can be a venturi or other passive device operable at relatively low fluid pressure that draws coolant through suction at the venturi narrowing point and mixes the coolant with the fluid for injection. The injection device is operable with a known BWR design, where the device is attached to a steam connection to the main steam line of the reactor, a coolant connection drawing from suction lines to a suppression cool or condensate tank, and an outlet connection injecting into the main feedwater lines. In a BWR, the injection device is operable without electricity and at a wide range of pressures, even less than 50 pounds per square inch, to maintain coolant levels in the reactor.

Abstract: A selectively operable vacuum source designed to reduce leakage is disclosed. In one example, the vacuum source is at least partially within an engine air intake system. The approach may reduce a number of sensors required to diagnose whether or not leaks are present within the vacuum source.

Abstract: The present invention is a hydrokinetic turbine consisting of a multi-stage suction-producing engine for converting the kinetic energy of canal or river flow into mechanical energy to power an electrical generator. It can be described as a ducted rotary hydro-craft, which has a buoyant body of fiberglass, ABS plastic, or other suitable material, comprising a concentric funnel and nozzle which enclose a torpedo-shaped hydrofoil structure at their center. A rotor or propeller attached to the torpedo-shaped internal structure drives an electrical generator. These ducts create suction forces that pull water through the rotor by creating an extreme low pressure zone behind the rotor, and this force combined with the direct pressure of canal flow onto the face of the rotor, produces an augmented volume of power.

Abstract: One of the main objects in providing optimal mass exchange for fuel cells, especially mobile fuel cells, is anode gas supply to fuel cell stack based on stoichiometric characteristics depending on variable loads and anode gas recirculation. External loads may vary in wide range and arbitrary change, thus complicate the optimal mass exchange in fuel cell stack. A new original technology is disclosed for anode gas supply using a multi-stage ejector. This technology, an ejector design and control system allow increasing fuel cell efficiency with quick loads changing from minimal to maximal as well as at cold start.

Abstract: Aspirators for inflating devices such as (but not limited to) aircraft evacuation slides and rafts are detailed. Housings of the aspirators may be made of wound filaments of composite materials, reducing their weight as compared to conventional metal structures. Such actions as reconfiguring and repositioning jet nozzles within the housings also contribute to enhancing performance of the aspirators.

Abstract: Detailed are fluid flow deflectors principally for use with sweep tail hoses of automatic swimming pool cleaners. The deflectors do not function principally on gravitational forces and need not necessarily employ flexible components or attachments for purposes of effecting deflection. Instead, the deflectors may be rigid and continually position a fixed obstacle in a central portion of a fluid stream. Perforations in a rigid wall, moreover, draw fluid into the deflectors, creating a greater volume of exiting stream when an associated pool cleaner is underwater.

Abstract: A device for guiding powdery fluidic media, in particular powder paint, including a receptacle which is provided with an inner chamber for the media which is to be guided, and from where the medium is suctioned via a connection channel which can be closed by a valve body. The connection channel and the valve body comprise, respectively, an upper end area formed in such a manner that an annular Venturi nozzle is formed therebetween which is used as a pump. The valve body is inserted in a sealed manner in the end region of the connecting channel by a sealing section when in the closed position thereof and comprises a conveyor gas channel which can impinged upon by conveyor gas, through which the conveyor gas can be guided to the connection channel in the vicinity of the sealing section, essentially, in the direction of flow of the medium.

Abstract: Well jet device comprises a packer mounted on a pipe string provided with a central channel embodied therein and jet pump. The pump has channels supplying a working medium to a nozzle, removing the media mixture and supplying a medium pumped from the well, respectively. Said nozzle is connected to the annular space by the channels and the channel is connected to the pipe string internal cavity through the channel on the side, where the diffuser of the pump enters and exits. A working medium flow switch is arranged in the body. An annular channel communicating with the channel via the channel and the nozzle is above said abutment flange and the steady bush comprises bypass holes and mounting seat for mounting a sealing unit with a hole for passing a logging cable with instruments therethrough or for arranging a depression insert provided with a return valve.

Abstract: According to one embodiment of the invention, a jet ejector method includes providing a primary jet ejector having a primary inlet stream, coupling one or more secondary jet ejectors to the primary jet ejector such that all of the jet ejectors are in a cascaded arrangement, bleeding off a portion of the primary inlet stream and directing the portion of the primary inlet stream to the secondary jet ejector that is closest to the primary jet ejector in the cascaded arrangement, and directing a motive fluid into the secondary jet ejector that is farthest from the primary jet ejector in the cascaded arrangement. The method further includes, at each secondary jet ejector, receiving at least some of the portion of the primary inlet stream and at least some of the motive fluid to create respective mixtures within the secondary jet ejectors, and at each secondary jet ejector, directing at least a portion of the respective mixture to adjacent jet ejectors in the cascaded arrangement.

Abstract: The invention relates to pumping engineering, mainly to downhole jet production units. The inventive downhole jet unit comprises a packer, a pipe column and a jet pump. An active nozzle and a mixing chamber are axially arranged in the body of the jet pump, and a pass channel provided with a mounting face for a sealing assembly with an axial channel is embodied therein. Said unit is also provided with an irradiator and a receiver transformer of physical fields. Said receiver transformer is arranged on the side of entry of a liquid pumped from the well into the jet pump and mounted on a cable passing through the axial channel of the sealing assembly. The output of the jet pump is connected to the pipe column above the sealing assembly. The input of a channel for feeding the pumped out medium of the jet pump is connected to a space around the pipe column below the sealing assembly. The input of a channel supplying a working medium to the active nozzle is connected to a space around the pipe column.

Abstract: A jet pump for a heat gun includes an elongate hollow pump body lying along a longitudinal axis. The pump body has an inlet, a mixing section and an outlet. A nozzle unit is axially aligned with the inlet for directing pressurized fuel into the inlet of the pump body. Movement of the pressurized fuel into the inlet causes air to be drawn into the inlet to mix with the fuel within the pump body. A disk shaped air diverter is axially spaced away from the inlet of the pump body. The diverter has a length and a diameter. The diameter of the diverter is greater than the length of the diverter and larger than the inlet of the pump body. A housing is radially spaced from and surrounds the diverter forming a first annular gap therearound for air outside the housing to pass therethrough. The air moves around the diverter then changes direction between the diverter and the inlet of the pump body before entering the inlet.

Abstract: The invention relates to a climate control device for temperature regulation of passenger compartments in motor vehicles. The device comprises an air treatment chamber (2) through which incoming air to the passenger compartment is made to flow via channels from air intake (4) to air outlet (5) to be temperature-regulated depending upon a nominal value and an actual value for the air temperature in the passenger compartment. The actual value is detected using at least one temperature sensor (12) located in the passenger compartment, and an air stream is created at the sensor by means of a suction duct which is connected to a suction inlet (19) of an ejector (16). The ejector is transversed by streaming air via a pressure inlet (27) and outlet (33) in the air treatment chamber.

Abstract: A steam injector system comprises a plurality of steam injectors each being provided with with a check valve adapted for water supply, a check valve adapted for steam supply, a check valve adapted for overflow and a check valve adapted for discharge and the respective water check valves, steam check valves, overflow check valves and discharge check valves are connected. In another aspect, a steam injector system comprises a plurality of first to last stage steam injectors arranged in series with each other, the last stage steam injector being provided with a relief valve disposed at a last stage overflow drain port, and a pressure pulsation absorbing device is disposed at least between the last stage overflow drain valve and the relief valve.

Abstract: A fluid dynamic pump, such as an ejector, has a common wall which separates a primary high energy fluid flow passage and a secondary low-energy fluid flow passage. The common wall includes a plurality of adjoining lobes extending in the direction of flow to the outlets of the passages at the downstream end of the common wall. A lobe on one side of the wall forms a corresponding trough on the other side. The common wall therefore has a wave-like shape at its downstream end. Primary and secondary fluid flow from the trough outlets on their respective sides of the common wall and are mixed together rapidly in a mixing region downstream of the outlets. A diffuser is located at the downstream end of the mixing region and enhances the pumping ability of the ejector. Secondary fluid is thereby drawn or pumped into the mixing region as a result of this transfer of energy from the primary stream to the secondary stream. Viscous losses are low during the process.

Abstract: An axially symmetric jet difuser ejector having attached primary injection nozzles without protruding outside the ejecting structure and being spaced around the ejector inlet. The primary nozzles have been specially designed to optimize the conveyance of fluids therethrough and the flow of ingested fluids therearound. The diffuser jet nozzle is provided with a strainer to prevent clogging of the narrow diffuser jet slots.

Abstract: A method for producing a flow of fluid comprised of at least phases from at least two primary flowing fluids, one of which has at least one liquid phase, and the other at least one gaseous phase, wherein the two primary fluids flow out respectively through one and another orifice, both of which may be streamlined, then a multiphase mixture is produced because the various flows are made to flow out through a third orifice and the channel sections of the orifices are adjusted in such a way so as to regulate at least one of the rate and pressure of the different flows, whereby a homogeneous multiphase flow is produced while minimizing the loss in energy of the different fluids.

Abstract: A jet diffuser ejector constructed and defined for maximizing thrust augmentation with minimal length. The ejector is provided with primary injection nozzles arranged in a preselected spaced relationship with the inlet section of the ejector and at a preselected angle with respect to the normal to the thrust axis of the ejector. The ejector may include a diffusing section having upstream and downstream diffusing sections with a diffuser jet arranged intermediate the diffusing sections.

Abstract: A nozzle for atomizing fuel for combustion in a gas turbine engine. During normal operation of the engine, the nozzle uses a portion of the air supplied to the combustion chamber by the engine compressor to atomize fuel flowing through the nozzle. During start-up and low power operation of the engine when flow of engine air through the nozzle would otherwise be of insufficient velocity to cause good atomization of the fuel, additional air from a separate external source is introduced at high velocity into the nozzle in the manner of an ejector. The additional air imparts high velocity to the engine air within the nozzle so that the air from both sources acts on the fuel at the nozzle discharge orifice at high velocity to effect good atomization and spray pattern of the fuel. The nozzle is designed in such a manner as to cause no significant restriction of engine air flow through the nozzle under high power operation of the engine when the external air source is shut off.