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 device is a gas-liquid mixing device having a venturi structure A in which a throttle portion and a conical portion are provided in a main passage through which a liquid passes, including: a gas mixing passage for taking in gas from a tangential direction with respect to the main passage having a circular cross section; and a protruding portion provided on a downstream side of the gas mixing passage of an inner wall forming the main passage and extending in a central axis direction of the main passage. It is preferable that the protruding portion is provided on an inner wall forming the conical portion, and is formed such that a protruding height from the inner wall increases toward the downstream side.

Flow straightener (434; 43B) comprising a cylinder (44) having an inlet mouth (46) and an outlet mouth (47), the cylinder (44) being internally provided with a helical rib (45) running on an inner surface (450) of the cylinder (44), wherein a ridge (456; 460) of the helical rib (45) follows a cylindrical helix with pitch p wrapped around a cylindrical volume having diameter d coaxial with the cylinder (44), whereby the ridge (456; 460) of the helical rib (45) delimits a clear central cylindrical section of the cylinder (44) having diameter d, wherein the helical rib (45) has a front main surface (457), facing the inlet mouth (46), and a rear main surface (458), facing the outlet mouth (47), the front main surface (457) forming with the inner surface (450) of the cylinder (44) a front angle that is obtuse, whereby 90<<180.

The present teachings provide apparatus and methods for mixing a reformable fuel and/or steam with an oxygen-containing gas and/or steam to provide a gaseous reforming reaction mixture suitable for reforming with a reformer and/or a fuel cell stack of a fuel cell unit and/or fuel cell system.

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.

An ozone injector device comprising a housing, a corona tube disposed within the housing and configured to generate ozone, a check-valve having a first end removably coupled to the water passageway and a second end configured to receive ozone, the second end having a cavity with a movable float contained therein, an ozone inlet fitting removably coupled to the second end of the check-valve, the ozone inlet being in fluid communication with the corona tube via a corona discharge tube such that ozone entering the water passageway through the ozone inlet must pass through the check valve, and a spring-loaded clearing piston positioned to move into and out of the water passageway directly opposite the ozone inlet, the clearing piston being biased upwards, and configured to prevent flow of ozone into the water passageway.

A microbubble generation device comprises a liquid inlet (101), a gas inlet (104), a bubble flow outlet (103), and a gas-liquid mixing chamber (102). An air-permeable hole having an angle structure is provided at a gas-liquid interface of the gas-liquid mixing chamber (102), and a pointed end of the angle structure of the air-permeable hole points to a liquid flow direction. The bubbles generated by the device are extremely small in diameter, prolonging a duration the bubbles stay in the liquid phase, and enhancing gas-liquid mass transfer efficiency.

An aerosol-generating system is provided, including: an aerosol-forming substrate; and a venturi element including an airflow channel, the airflow channel including an inlet portion, a central portion, and an outlet portion, and the inlet portion is configured to converge towards the central portion with an inlet angle of between 1? and 19?, and the outlet portion is configured to diverge from the central portion.

The present teachings provide apparatus and methods for mixing a reformable fuel and/or steam with an oxygen-containing gas and/or steam to provide a gaseous reforming reaction mixture suitable for reforming with a reformer and/or a fuel cell stack of a fuel cell unit and/or fuel cell system.

The present invention relates to a delivery system. In particular, the invention relates to a system for delivery of one or more products to a body of water for treating and/or disinfecting the body of water. The invention further relates to methods of using a delivery system of the invention for delivery of one or more products to a body of water for treating and/or disinfecting the body of water. Even more particularly, the invention relates to a system for delivery of ozone and/or chlorine to a swimming pool or spa for disinfection of pool or spa water.