A Venturi device for introducing a second fluid into a first fluid includes a T-joint, a converging component, and a diverging component. The T-joint component includes a first elongated tube extending along a first direction and a second elongated tube extending along a second direction. The converging component is shaped and dimensioned to slip fit within a first through-opening of the first elongated tube through a first inlet port and has a cross-section that decreases along the first direction from the first inlet port to an inner section of the first though-opening. The diverging component is shaped and dimensioned to slip fit within the first through-opening of the first elongated tube through an outlet port and has a cross-section that increases along the first direction from the inner section of the first though-opening to the outlet port. The converging component is coaxially aligned with the diverging component along the first direction.

The invention relates to a method for mixing at least two fluids using an externally mixing nozzle for medical purposes, which has at least two outlet channels (10, 20) and at least two inlet openings (13, 23) with different or identical cross-sections, wherein two fluids with different volumetric flows and/or different viscosity are sprayed, and wherein the ratio of the cross-sections of the inlet channels (13, 23) and/or the outlet channels (10, 20) corresponds to the ratio of the volumetric flows so that the fluids flow with substantially identical flow speeds through the outlet channels (10, 20) and/or the inlet openings (13, 23). The invention furthermore relates to an externally mixing nozzle, a medical instrument and a medical device for spraying substances, in particular biological material.

Methods and systems are provided for a fuel injector. In one example, a system may include an injection nozzle having a venturi shape with an upstream twisted fin arranged in a venturi inlet. The system may further include a downstream twisted fin arranged in a venturi outlet.

The present invention relates to a device (1) for the generation of micro and nano bubbles of gas in a liquid comprising: an outer tubular body (10) with an extension along a longitudinal axis a-a; an inlet (20) for a flow of liquid; an outlet (30) of the flow of liquid in fluid communication with said inlet (20); a central body (40) contained in a central area of said outer tubular body (10). The central body (40) comprisesa pre-chamber (41) containing a gas; an air intake (42) in connection with said pre-chamber (41) and with an external source of gas; a converging element (52), configured to concentrate the flow of liquid at the inlet; a Venturi chamber (44) in fluid contact with said pre-chamber (41), configured to suck the gas from the pre-chamber (41) and generate micro and nano bubbles of gas in the liquid that passes through it.

A diesel exhaust fluid (DEF) nozzle includes a first conduit, an outlet of the first conduit defining an inlet of a first mixing chamber; and a second conduit disposed around the first conduit, an outer surface of the first conduit and an inner surface of the second conduit defining a second flow path therebetween. A flow area of the second flow path decreases from an inlet of the second flow path to a throat, and increases from the throat to an outlet of the second flow path. The inner surface of the second conduit defines a peripheral wall of the first mixing chamber, and a peripheral wall of a second mixing chamber, the first flow path and the second flow path being in fluid communication with the second mixing chamber via the first mixing chamber.

The present disclosure is generally directed to a design geometry of a venturi or an ejector that is optimized in systems and methods for increasing the operating range of the venturi or the ejector in a fuel cell system. The present disclosure is also generally directed to fuel cell systems and methods for sizing and/or integrating a recirculation blower with a venturi or an ejector in a fuel cell or fuel cell stack. The present disclosure is further generally directed to systems and methods of operating a fuel cell system comprising more than one venturi or ejectors during transient operations.

A venturi-type composite nozzle device for suctioning and removing air pollutants is disclosed. The venturi-type composite nozzle device suctions air pollutants in the vicinity thereof by using negative pressure formed through the venturi principle, and then mixes same with water, jets the mixed water and brings same into contact with the air pollutants again, so as to have a large adsorption ratio of air pollutants in comparison to the amount of water usage, and enables water to be reduced by that amount, and thus has excellent operating performance. To perform such functions, the device employs a venturi-type intake casing, an introducing-spray nozzle, and an impeller.

The present disclosure is directed toward a system and a method for gas-condensate recovery. A gas-condensate separator is in fluid communication with a production header and an ejector comprising a motive inlet, a suction inlet, and an ejector outlet. The gas-condensate separator comprises an inlet, a gas outlet, and a recovered condensate outlet. The recovered condensate outlet is in fluid communication with the suction inlet of the ejector, and the ejector outlet is in fluid communication with the production header. The method comprises feeding a production fluid from a production header to a gas-condensate separator. The production fluid is separated in the gas-condensate separator. A gas and a recovered condensate are recovered and the recovered condensate is recycled into the production header.

An eductor for mixing a primary fluid with a flowable secondary substance includes a primary inlet for the primary fluid, a secondary inlet for the secondary substance, an outlet and a suction chamber, A converging inlet nozzle is provided, which is arranged between the primary inlet and the suction chamber so that the primary fluid can flow from the primary inlet into the suction chamber. An outlet nozzle is provided between the suction chamber and the outlet, through which the primary fluid and the secondary substance can flow to the outlet, and the secondary inlet is provided at the suction chamber so that the secondary substance can flow from the secondary inlet into the suction chamber.

A fluoride ion cleaning system is provided. The system includes a retort including an interior sized to receive at least one component therein. The at least one component has a target area defined thereon. The system also includes a gas distribution system. The gas distribution system includes a manifold configured to provide reaction gas within the interior, a flow modulator configured to agitate the reaction gas within the interior, and at least one nozzle in flow communication with the flow modulator. The at least one nozzle is adapted to define an agitated flow of reaction gas at the target area of the at least one component.