Abstract: An ejector device comprises a housing (110) having a motive fluid inlet (111) to receive motive fluid, a suction fluid inlet (112) to receive suction fluid and a fluid outlet (113) to output the motive fluid and the suction fluid. The ejector device comprises a nozzle and diffuser assembly (150) configured to fit within the housing (110). The nozzle and diffuser assembly (150) comprises a nozzle (160), a diffuser (170) and a connecting structure (180) connecting the nozzle (160) to the diffuser 170. The connecting structure (180) is configured to permit fluid flow between the nozzle (160) and the diffuser (170). The connecting structure (180) has apertures (182) configured to allow fluid to be drawn into the fluid flow between the nozzle 160 and the diffuser (170).

Abstract: An ejector device (1), e.g., for pumping a gas using a liquid motive fluid, has an injector portion (100), and a diffuser portion (50), the injector portion (100) being arranged for injecting a flow of motive fluid from a motive fluid inlet (10) into an inlet section (52) of the diffuser portion (50) thereby to draw a suction fluid from a suction fluid inlet (20) into the inlet section (52) of the diffuser portion (50). The injector portion (100) includes a flow-modifying arrangement with at least one rotational deflector element (104), e.g., three vanes (104V1, 104V2, 104V3) each at a desired twist angle, constructed and arranged to deflect motive fluid into a helical path as it moves over or through the rotational deflector element (104), and at least one baffle element (103), e.g., a baffle plate (103), downstream of the rotational deflector element (104).

Abstract: An ejector device (1), e.g. for pumping a gas using a liquid motive fluid, comprising: an injector portion (100), and a diffuser portion (50), the injector portion (100) being arranged for injecting a flow of motive fluid from a motive fluid inlet (10) into an inlet section (52) of the diffuser portion (50) thereby to draw a suction fluid from a suction fluid inlet (20) into the inlet section (52) of the diffuser portion (50); wherein the injector portion (100) comprises a flow-modifying arrangement comprising: at least one rotational deflector element (104), e.g. comprising three vanes (104V1, 104V2, 104V3) each at a desired twist angle, constructed and arranged to deflect motive fluid into a helical path as it moves over or through the rotational deflector element (104), and at least one baffle element (103), e.g. a baffle plate (103), located downstream of the rotational deflector element (104).