Abstract: There is provided an airflow generation device and the like capable of suppressing an increase in a number of poles of a slip ring, and effectively preventing a malfunction from occurring due to a generation of noise caused by the slip ring. An airflow generation device of an embodiment has a main body, a rotation speed detecting unit, and a voltage application unit. The main body has a first electrode and a second electrode provided to a base formed of a dielectric, and is disposed on a rotary body. The rotation speed detecting unit detects a rotation speed of the rotary body. The voltage application unit generates an airflow by applying a voltage between the first electrode and the second electrode based on the rotation speed detected in the rotation speed detecting unit. Here, the voltage application unit and the rotation speed detecting unit are disposed in the rotary body.

Abstract: A single suction type centrifugal fan includes a casing, an impeller, and a main plate. The casing includes a side plate and a motor fixing side plate, and the side plate and the motor fixing side plate are arranged in parallel. A rectifying plate is provided between the motor fixing side plate and the main plate, and the rectifying plate is formed from an inclined surface in which an area of a cross section orthogonal to a rotation shaft is reduced toward the impeller around the rotation shaft of a motor. A first rectifying plate diameter at another side of the rectifying plate closer to the impeller is smaller than an impeller diameter of the impeller.

Abstract: A rotor which comprises at least one blade and at least one fluid routing device that is mechanically connected to one of the blades so that a fluid inlet thereof is placed in a lateral edge of the blade. The fluid routing device has a continuous channel with an inlet facing the opposite direction of rotation of the blades and an outlet. The continuous channel is sized and shaped to conduct fluid passing via the inlet. The fluid routing device includes a flow directing element that is mechanically connected to the outlet so as to direct the conducted fluid to adjust fluid flow in or on the mechanically connected blade.

Abstract: A ceiling fan system wherein the motor of the ceiling fan is housed between the ceiling and the roof of an enclosure within which the ceiling fan is to be used, thereby disposing the motor out of view of occupants within the enclosure where the ceiling fan is being used.

Abstract: An exhaust pipe mounted heat duct in an electrical generator includes an exhaust pipe coupleable to an internal combustion engine of the electrical generator to receive exhaust therefrom, the exhaust pipe having a first support member and a second support member extending outwards from the exhaust pipe. The exhaust pipe mounted heat duct also includes a heat duct assembly comprising a first component and a second component, the first component mounted to the first support member and a second component mounted to the second support member, the first component coupled to the second component to substantially surround the exhaust pipe.

Abstract: The present disclosure provides devices related to aircraft engine fan assemblies and blade lock retainers. In various embodiments, a blade lock retainer is formed from sheet metal and comprises an annular ring portion, an outer retainer tab portion, and an inner tab portion. In various embodiments, the outer retainer tab portion is disposed on an outer circumference of the annular ring portion, oriented substantially perpendicular to the annular ring portion, and extends in an aft direction from the annular ring portion. In various embodiments, the inner retainer tab portion is disposed on an inner circumference of the annular ring portion and radially aligned with the outer retainer tab portion, oriented substantially perpendicular to the annular ring portion, and extends in a forward direction from the annular ring portion.

Abstract: A wind turbine blade having a circular root portion and provided with root bushings for mounting the blade to a wind turbine hub, and the root bushings comprise an elongated cross-sectional profile with a first dimension oriented along a radius of the circular root portion being larger than a second dimension oriented along a circumferential direction of the circular root section.

Abstract: An arrangement for securing a functional position of a shroud plate of a rotor of a gas turbine, which shroud plate is arranged on an outer circumference of a rotor disc of the rotor, relative to a moving blade of the rotor arranged on the outer circumference of the rotor disc, wherein a channel portion of an annular cooling channel of the rotor is formed between the shroud plate located in its functional position and a side, facing the shroud plate, of a blade root of the moving blade. A rotor assembly for a rotor of a gas turbine, having a rotor disc, a moving blade ring arranged on the outer circumference of the rotor disc and a shroud plate ring arranged on the outer circumference of the rotor disc.

Abstract: An exhaust-gas section for a gas turbine, having a surrounding shroud having a first opening, which is arranged in a region of the exhaust-gas section that has a pressure lower than the air pressure of the outer environment of the gas turbine in an operating state of the gas turbine and which forms the outlet of an air channel, the inlet of which is connected to the outer environment of the gas turbine. The air channel has a chamber at the outlet-side end of the air channel, which chamber has a second opening, through which a specified gas mass flow is admitted into the chamber.

Abstract: A system suitable for extracting power directly from the main shafts of slow-moving mechanical systems. The system has a closed gas circuit having a lower-pressure (LP) side and a higher-pressure (HP) side. The LP side is at a pressure substantially greater than atmospheric pressure. The system includes primary compressors coupled to the wind turbines, thermal stores coupled to heat-exchangers on both the LP and HP sides of the closed gas circuit, a secondary motor-compressor set and an expander-generator set. The system allows some degree of independence between the input power resource and the output power. When substantial wind power is present and the demand for electrical power is weak, this system can export a fraction of the energy captured and store the rest. When the wind resource is low, the system can export more power than is being collected by drawing energy from the thermal stores.

Abstract: A compressor for a gas turbine engine includes a stator and a rotor. The stator includes first and second stator vanes attached to first and second vane platforms, respectively. The rotor includes a plurality of rotor blades that rotate with respect to the stator. An inner stator casing supports the first and second vane platforms and encloses the stator and the rotor. An outer stator casing encloses the inner stator casing, and a bleed cavity is disposed therebetween. At least one diffuser is disposed between the first vane platform and the second vane platform, and is configured to allow air communication between the inner stator casing and the bleed cavity. An exit opening of the diffuser is disposed within the bleed cavity at a location separate from the inner stator casing and the outer stator casing.

Abstract: A gas turbine engine component (50, 100, 150, 160, 174, 206, 236), including: a surface (54) subject to loss caused by a wear instrument during operation of the component in a gas turbine engine and a performance feature (80, 82, 102, 152, 162, 172, 200, 230) associated with the surface. The surface and the performance feature interact in a manner that changes with the loss such that a change in performance of the gas turbine engine resulting from the loss is mitigated.

Abstract: A bladed rotor and a hub rotor for a gas turbine are provided. A bladed rotor may comprise a rotor interface comprising a radially inward surface, wherein the rotor interface comprises a constant diameter zone; and a reduced stress zone located adjacent to and aft of the constant diameter zone. A hub rotor may comprise a hub interface comprising a radially outward surface, wherein the hub interface comprises, a constant diameter zone, and a reduced stress zone located adjacent to and aft of the constant diameter zone.

Abstract: Disclosed is a device for regulating the compression force of a spring-spacer assembly provided in a mechanical shaft seal in a system including a motor and a pump or compressor. The device includes a spacer made from shape memory alloy, a spring in line with the spacer, and a heater proximate the spacer. When heated, the spacer contracts in length, resulting in a decrease in compression force. Also disclosed are systems and methods utilizing the device. The device is particularly useful when starting a pump or compressor to reduce friction in the mechanical seal. Existing mechanical seals can be easily retrofitted with the device.

Abstract: A gas turbine engine rotor arrangement comprising at least one blade and a disc is disclosed. The blade extends radially outwards from the disc and is secured thereto by cooperating shank of the blade and recess of the disc. The shank comprises a bottom surface facing a base surface of the recess, the bottom surface having axially extending peripheral edges. The bottom surface is shaped so that when the engine rotor arrangement is in use, liquid in a cavity between the bottom surface and base surface, acted upon by an unbalanced force in the radially outward direction, is guided by the bottom surface to flow between and away from the axial edges.

Abstract: A vehicle includes a frame supporting an engine, a transmission including an input shaft and an output shaft, a driving device linked to the output shaft so that power is transmitted therebetween, and a supercharger including a rotation shaft linked to the output shaft so that power is transmitted therebetween. The supercharger is fixed to the frame.

Abstract: A rotary machine includes a guide section formed in an annular flow path in communication with a suction volute at an inner circumferential side of the suction volute, at which a plurality of vanes are installed in a circumferential direction, and configured to guide a fluid introduced from the suction volute, and an impeller connected to the guide section in the axial direction and into which the fluid guided by the guide section is introduced, wherein the suction volute has an annular opening section in communication with the guide section at the inner circumferential side, and an inner wall surface extending from the opening section toward the axial direction impeller in the axial direction to increase a width dimension in the axial direction and connected to a partition section at an opposite side of the suction nozzle.

Abstract: A compressor wheel (1) of a radial compressor (2) of an exhaust-gas turbocharger (3), having a hub (8); and having two blade rows (9, 10) which are arranged adjacent to one another on the hub (8), a first blade row (9) forming the leading blade row, and the adjacent, second blade row (10) forming the trailing blade row, wherein the number of blades (11) of the first blade row (9) is equal to the number of blades (12) of the second blade row (10).

Abstract: A compressor and a method for reducing acoustic energy generated in the compressor are provided. The compressor may include a housing defining a fluid pathway and a shunt hole fluidly coupling the fluid pathway with another component of the compressor. The compressor may also include an impeller at least partially disposed in the fluid pathway and coupled with a rotary shaft. The impeller may be configured to rotate with the rotary shaft to direct a process fluid through the fluid pathway of the compressor. A disk may be disposed between the fluid pathway and the shunt hole. The disk may define a plurality of openings fluidly coupling the fluid pathway with the shunt hole and configured to reduce acoustic energy generated in the compressor.

Abstract: A system includes a waste heat recovery heat exchanger configured to heat a heating fluid stream by exchange with a heat source in a crude oil associated gas processing plant. The system includes an Organic Rankine cycle energy conversion system including a pump, an energy conversion heat exchanger configured to heat the working fluid by exchange with the heated heating fluid stream, a turbine and a generator configured to generate power by expansion of the heated working fluid, a cooling element configured to cool the expanded working fluid after power generation, and an accumulation tank. The heating fluid flows from the accumulation tank, through the waste heat recovery heat exchanger, through the Organic Rankine cycle energy conversion system, and back to the accumulation tank.