A hydropower generator and a fluid-driven propulsion drive are provided. The hydropower generator includes a frame, a roller attached to the frame, a generator operatively connected to the roller, such that rotation of the roller powers the generator, and an endless belt extending from and operatively engaged with the roller. The endless belt has a proximal end engaged with the roller for rotation thereof, and a plurality of pockets extending from a main surface of the endless belt for receiving a flow of fluid thereby moving the endless belt relative to the frame and driving rotation of the roller, and where each of the plurality of pockets includes an opening facing towards the roller about one of the major sides of the endless belt.

An impeller includes a hub, and a plurality of blades supported by the hub, the blades being arranged in at least two blade rows. The impeller has a deployed configuration in which the blades extend away from the hub, and a stored configuration in which at least one of the blades is radially compressed, for example by folding the blade towards the hub. The impeller may also have an operational configuration in which at least some of the blades are deformed from the deployed configuration upon rotation of the impeller when in the deployed configuration. The outer edge of one or more blades may have a winglet, and the base of the blades may have an associated indentation to facilitate folding of the blades.

The present disclosure relates to a pump. The pump of the present disclosure includes: a housing; an impeller disposed in the housing and rotating to generate a flow of fluid; and a pump motor configured to rotate the impeller, wherein the impeller includes: a first plate having a disk shape; a boss extending vertically from a center of the first plate, and coupled to a rotating shaft of the pump motor; a plurality of blades extending from an outer circumferential surface of the boss in a radial direction of the first plate; and a second plate having a surface parallel to the first plate, spaced apart from the first plate by a predetermined distance, and connected to the plurality of blades.

Embodiments of systems and methods for air recovery are disclosed. The diverted pressurized air may be used to supply a hydrostatic purge to the unutilized portion of a turbine engine fuel manifold circuit to ensure that exhaust gases from the utilized side of the fuel manifold circuit do not enter the portion of the alternative fuel manifold circuit rack. The assembly used to remove compressor section pressurized air may include a flow control orifice, line pressure measuring instrumentation, non-return valves, isolation valves and hard stainless-steel tubing assemblies. In some embodiments, a turbine compressor section diverter system may include a small air receiver used to increase the volume of air supplying the manifold to aid in potential pressure and flow disruptions from a turbine engine compressor section.

An example system comprises an electric machine including a stator and a rotor, a cooling system configured to supply a cooling fluid to cool the electric machine, and a stator tube configured to contain the cooling fluid within a stator portion of the electric machine and prevent the cooling fluid from contacting the rotor.

A rocket propulsion system (200, 300, 400, 500, 600) comprising: a propellant tank (208, 306, 308, 406, 408, 506, 508, 606, 608) arranged to contain propellant, a liquid pressurant tank (202, 302, 402, 502a, 602a) arranged to contain a liquid pressurant and to supply the pressurant to the propellant tank to pressurise the propellant tank, an engine (211, 311, 411, 511, 611), the engine comprising: a combustion chamber (210, 310, 410, 510, 610) arranged to receive pressurised propellant from the propellant tank and defining a volume for combusting the pressurised propellant to produce an exhaust product, and an exhaust nozzle (212, 312, 412, 512, 612) arranged to receive the exhaust product from the combustion chamber, and a heat exchanger (214, 314, 414, 514, 614) arranged to transfer heat from the engine to the pressurant.

A bearing chamber is provided. The bearing chamber includes an interior surface comprising a terminal block defining a keyway and a conduit terminating at the keyway and an oil nozzle defining an internal channel. The oil nozzle includes a base tightly fittable in the keyway. When the base is tightly fit in the keyway, the internal channel is communicative with the conduit and an orientation of the keyway and a configuration of the oil nozzle are cooperatively established to aim the oil nozzle at a predefined target within the bearing chamber.

A power generation system includes a reactor operable to produce a flow of hydrogen and a flow of steam in response to the receipt of a flow of reactant mixture. A combustor is operable to produce a flow of combustion gas in response to the receipt of the flow of hydrogen and a first portion of the flow of steam, a turbine is operable to produce rotation of a first shaft in response to the receipt of the flow of combustion gas, and a steam turbine is operable to produce rotation of a second shaft in response to the receipt of a second portion of the flow of steam.

Apparatus and method derive useful energy from kinetic energy of a fluid, such as air or water, flowing in an existing direction of flow. A rotor carries impeller blade assemblies in circumferentially spaced apart positions about an axis of rotation. Vanes are carried by the impeller blade assemblies for unrestricted free pivotal movement between stops that establish a first position wherein a vane is oriented for being driven by the flow of fluid to rotate the rotor in a desired direction of rotation, and a second position wherein the vane is precluded from an orientation in which the flow of fluid could establish a force tending to retard rotation of the rotor in the desired direction, thus facilitating rotation of the rotor in the desired direction of rotation, independent of the direction of flow of the air or water, while the apparatus remains immersed in a single selected orientation within the flowing fluid.

A kinetically driven machine for pressurizing water containing kinetically driven pressure pumps containing a front and rear part. The front part contains a pump mounted with thrust bearings, so the pump can rotate around itself. The pump is fitted with a front wing set, that can rotate the front part of the pressure pump. The rear part contains a gearbox that is mounted on the pump. The very gear is mounted on the drive shaft of the pump. A protective tube is fitted around the gearbox and attached with thrust bearings, so that the protective tube can rotate around the gearbox. The rear wing set, constructed like the front wing set, is mounted on the protective tube whereby the rear wing set can rotate the gear. The wing sets rotate in opposite directions, so the energy of the water is transformed into rotational energy that thereby drives the pump.