The invention relates to a jet pump unit (46) for controlling a gaseous medium, in particular hydrogen, comprising a nozzle (1) and a mixing tube unit (30), said mixing tube unit (30) having a longitudinal axis (48) and the nozzle (1) a longitudinal axis (18). The longitudinal axis (48) of the mixing tube unit (48) and the longitudinal axis (18) of the nozzle (1) include an angle (α) with each other.

An apparatus and method relating to a generator comprising a housing defining an interior and fluidly separating the interior from surrounding ambient air, at least one of a rotor or stator located within the housing, a cooling circuit passing through at least a portion of the housing to cool the interior and recirculating a coolant having a density greater than the ambient air, and a jet pump having a motive fluid conduit fluidly coupled to the cooling circuit, a transport fluid circuit fluidly coupled to the ambient air.

A jet pump may include a body that may include an inlet portion having a motive port and a first induce port, a throat, a tapered wall connecting the inlet portion with the throat, a discharge port, and a diffuser connecting the throat and the discharge port. The tapered wall may include a converging angle of about 5 degrees.

An aspirator for an evacuation assembly includes a duct defining a flow axis with an upstream portion and a downstream portion, a vane spanning the upstream portion of the duct, and a nozzle. The nozzle has an outlet, is supported by the vane, and is positioned within the upstream portion of the duct. The outlet is laterally offset from the flow axis and is axially overlapped by the vane to limit resistance to a primary gas flow entering the duct through the outlet of the nozzle. Evacuation assemblies are also described.

An ejector includes a nozzle, a suction chamber, and a diffuser. A diffuser further includes an attachment configured to change the dimensions of the outlet flow path. The attachment changes the length X of a narrowed flow path and the length Y and the inner diameter D of a parallel flow path such that expressions (1) and (2) are satisfied:
X=A×D  (1),
and
Y=B×D  (2).

A suction device for removing a fluid substance from an accumulation site includes a housing comprising a sidewall that defines an interior channel, a first inlet disposed at a first end of the sidewall and through which the fluid substance is drawn, a second inlet disposed along a lateral area of the sidewall and through which a pressurized fluid flows, and an outlet disposed at a second end of the sidewall and through which the fluid substance and the pressurized fluid flow, the second end of the sidewall opposing the first end of the sidewall; and a graduated tube disposed within the interior channel of the housing and through which the fluid substance flows, the graduated tube comprising a tapered wall that accelerates the fluid substance through the graduated tube and towards the outlet.

An ejector device having a base body that includes a suction chamber for sucking in a suction medium, a mixing channel for mixing a propelling medium with the suction medium, and a drive nozzle device for generating and directing a propelling medium jet along a jet direction from the suction chamber and into the mixing channel. The ejector device also includes a fastening device for fastening the base body of the ejector device to a suction channel. The fastening device also includes at least one of a translational locking device for avoiding a translational movement of the base body relative to the suction channel in a direction running parallel to a center axis of a connecting piece of the suction channel and a rotational locking device for preventing the base body from rotating relative to the suction channel.

An aspirator may include an aspirator body comprising an outer wall and an inner wall, the inner wall defining a body channel. The aspirator may include an aspirator body including an outer wall and an inner wall, the inner wall defining a body channel. The aspirator body may include a plenum disposed between the outer wall and the inner wall. The aspirator body may include a plurality of apertures disposed between the outer wall and the inner wall and defined by a side wall and the plenum. The aspirator may include an aspirator barrel comprising a barrel outer wall and a barrel inner wall, the barrel inner wall defining an air channel. The air channel may be in fluid communication with the plenum.

An aspirator for an inflatable assembly may comprise a housing and an inlet flap biased away from an interior of the housing. A pressure relief flap may be biased toward the interior of the housing. A manifold may be located in the interior of the housing and configured to output a primary gas flow toward an outlet of the housing. A nozzle may be fluidly coupled to the manifold. The nozzle may be configured to output the primary gas flow to the manifold.

A wellbore jet pump includes a nozzle body with a tapering nozzle passage therein and a pump body with a main passage that receives the nozzle body therein so as to define within the main passage (i) an intake section surrounding the nozzle body, (ii) a mixing section immediately above the nozzle body, and (iii) a diffuser section diverging upwardly from the mixing section. A bypass conduit directs a working fluid downwardly alongside the pump body and upwardly into one of the nozzle passage or the intake section so that produced fluids are drawn into the other one of the nozzle passage or the intake section for subsequent mixing of the working fluid and the produced fluid in the mixing section. In this manner both the working and produced fluids are accelerated before entering the mixing section to increase pump efficiency.