A gas turbine engine is provided having a combustion section with a liner extending between a forward end and an aft end. A structural member is positioned in or around at least a portion of the combustion section. Additionally, a piston ring holder is provided attached to the structural member at a first end and positioned proximate to the aft end of the liner at a second end. The piston ring holder is a bimetallic member including a first portion formed of a first material and a second portion formed of a second material. A coefficient of thermal expansion of the first material is different than a coefficient of thermal expansion of the second material.

Provided are an electroosmotic pump, including: a membrane; a first electrode which is provided on one surface of the membrane, including a porous support including an insulator and an electrochemical reaction material formed on the porous support; and a second electrode which is provided on the other surface of the membrane, including a porous support including an insulator and an electrochemical reaction material formed on the porous support, and a fluid-pumping system including the electroosmotic pump.

Provided are an electroosmotic pump, including: a membrane; a first electrode which is provided on one surface of the membrane, including a porous support including an insulator and an electrochemical reaction material formed on the porous support; and a second electrode which is provided on the other surface of the membrane, including a porous support including an insulator and an electrochemical reaction material formed on the porous support, and a fluid-pumping system including the electroosmotic pump.

Two hybrid ball bearings and a compressor bearing arrangement with two hybrid ball bearings for a rotatable support of a rotor of the compressor versus a stator of the compressor. The two hybrid ball bearings are arranged face-to-face or back-to-back, are configured with an optimal axial clearance depending on the inner diameter of a ring-shaped inner raceway element one of the hybrid ball bearings respectively a pitch diameter of one of the two hybrid ball bearings for a long bearing life in connection with an optimal compressor operating performance.

A Sub-Terrestrial Updraft Tower (STUT), combination subsurface Downdraft/Updraft Tower, comprising an Inner Updraft Shaft and Outer Downdraft Shaft, housing the Inner Updraft Shaft, receiving air flow from air-inlets at surface level into Outer Downdraft Shaft. Upon reaching the bottom of the Outer Downdraft Shaft, air flow reverses In direction, inward and upward, into the Inner Updraft Shaft. Volumetric Displacement or airflow is induced and sustained via the injection of air and heat into the Downdraft/Updraft respectively; driving a plurality of sustained system pressure biases, and fed by temperature differentials that are initiated, sustained, and enhanced due to the configuration, orientations and functions of numerous STUT elements including partitions, thermal barrier coatings, air intake and cowlings; creating coherent, accelerated airflow to pass through/within a ringed shaped, diverging converging Vertical Axis Vertical Airflow Nozzle and Turbine (VAVANT); airflow causes rotation of VAVANT, and summation of torque forces at VAVANT hub, shaft, gearbox, and power head, generate EMF, and electrical power.

Provided are an electroosmotic pump, including: a membrane; a first electrode which is provided on one surface of the membrane, including a porous support including an insulator and an electrochemical reaction material formed on the porous support; and a second electrode which is provided on the other surface of the membrane, including a porous support including an insulator and an electrochemical reaction material formed on the porous support, and a fluid-pumping system including the electroosmotic pump.

An electrical energy generator array generates electricity from at least one form of natural flow, the generator having a drive shaft driven by energy from a natural energy flow and connected to a drive mechanism. The generator includes an integrated electric motor and a plurality of individual generators disengageably connected to the drive mechanism. Each generator is connected via a series of ties to form a connected generator array, the array being rotated by the drive mechanism when connected thereto, or by the integrated electric motor when disconnected from the drive mechanism, to generate electricity. The generator may include an electrical storage device arranged to power the integrated electric motor. A method of generating electricity from at least one natural energy flow, for supply to an electrical storage device, for local use or for supply to an electric grid includes using an electrical energy generator array as described.

A wind turbine blade includes a base member formed of FRP and having a blade shape, an intermediate layer arranged on the base member and formed of metal, cermet, ceramic, or a mixture of at least one thereof and resin as a major constituent, and an erosion-resistant overcoat arranged on the intermediate layer and formed of a spray film having a porosity of 5% or lower.

One aspect of the invention relates to a pump device, comprising i. an impeller; ii. a pump housing which at least partly surrounds an interior region, having an inlet and an outlet, wherein the impeller is located within the interior region of the pump housing; wherein the pump housing comprises at least one first subregion and at least one further subregion; wherein the first subregion comprises a ceramic, wherein the further subregion comprises a metal, wherein at least one part of the first subregion and at least one part of the further subregion are connected to one another. One aspect of the invention further relates to a housing which comprises the features described for the pump housing. One aspect of the invention also relates to a method for producing a pump housing.

A gas turbine engine is provided having a combustion section with a liner extending between a forward end and an aft end. A structural member is positioned in or around at least a portion of the combustion section. Additionally, a piston ring holder is provided attached to the structural member at a first end and positioned proximate to the aft end of the liner at a second end. The piston ring holder is a bimetallic member including a first portion formed of a first material and a second portion formed of a second material. A coefficient of thermal expansion of the first material is different than a coefficient of thermal expansion of the second material.