Abstract: A wind turbine nacelle comprising a plurality of power generating components and a fluid system, wherein the nacelle includes a nacelle cover comprising a lower cover or ‘base’, a roof and side walls, thereby defining an interior space of the nacelle, wherein the fluid system includes a fluid tank that is integrated into the nacelle cover. The invention extends to a panel of a wind turbine nacelle cover, wherein the panel is configured to define at least apart of, or is coupled to, a fluid tank of a fluid system of the wind turbine.

Abstract: A contra-rotating compressor includes a first shaft assembly disposed in a housing, the first shaft assembly including an outer shaft, and a first plurality of impellers coupled to the outer shaft, wherein the outer shaft includes a final stage that includes a final impeller of the first plurality of impellers. The compressor further includes a second shaft assembly disposed in the housing and rotatable about the longitudinal axis that has a second plurality of impellers, a first pair of annular seals between the final stage and an inner surface of the housing that are configured to permit relative rotation between the final stage and the housing, and a third annular seal positioned between the outer surface of the final stage and an inner surface of the second shaft assembly that is configured to permit contra-rotation between the final stage and the second shaft assembly.

Abstract: The invention is made up of a supporting tower on which a rotor is installed, which comprises two parallel crossarms having two parallel rings fastened to the outer ends thereof which serve as a support for the bearings which, secured to the outer casing, make up the rotor, and said casing fixed on the inside thereof comprises a toothed wheel for transmitting the force of rotation, by epicyclic gearing, to the interior of the tower which forms a space suitable for housing the transmission, which is necessarily vertical, and runs towards the multiplier box. The blades are formed on two horizontal parallel beams which are joined and compacted together by metal boxes which house the guiding mechanisms and shafts that support and orient the blades.

Abstract: A rotor blade of a wind turbine including an aerodynamic device which can be actuated pneumatically by the use of a pressure supply system is provided. The pressure supply system includes a pressurized air supply system, a pressurized air transmission system with pressure lines for transmitting the supplied pressurized air from the pressurized air supply system to the aerodynamic device, at least one pneumatic actuator for activating the aerodynamic device, and a safety system to protect the rotor blade from damages caused by overpressure in the pressurized air transmission system and/or the actuator. The safety system includes means for discharging pressurized air from the pressurized air transmission system and/or the actuator. Also provided is a wind turbine for generating electricity including at least one such rotor blade.

Abstract: A fan impeller structure includes a hub and a blade set. The hub has a top wall and a circumferential wall extending from a circumference of the top wall. The blade set has multiple upper blades and multiple lower blades. The upper and lower blades are alternately arranged on the circumferential wall. Each upper and lower blade respectively has a first windward face and a second windward face which is extending in a different direction from the first windward face. The first windward face is disposed in such a direction as to face the rear edge of the lower blade on the lower side, while the second windward face is disposed in such a direction as to face the rear edge of the upper blade on the upper side.

Abstract: A method for designing an impeller with a small hub-tip ratio includes the following steps: S1: obtaining an outer diameter D of the impeller with the small hub-tip ratio; S2: determining the number of blades and an airfoil of the blade of the impeller with the small hub-tip ratio; S3: obtaining a blade solidity sy at a rim of the impeller with the small hub-tip ratio and a blade solidity sg at a hub of the impeller with the small hub-tip ratio; S4: dividing the blades of the impeller with the small hub-tip ratio into m cylindrical sections in an equidistant manner, marking the cylindrical sections as 1-1, 2-2, . . . , m-m in sequence from the hub to the rim, and obtaining an airfoil setting angle ?L of each of the cylindrical sections; and S5: performing a correction on the value of the airfoil setting angle ?L in S4.

Abstract: A multirotor wind turbine comprising a tower, a suspension arm, a nacelle, and a rotor carried by the nacelle and configured to rotate about a rotor axis to drive a drive train in the nacelle, wherein the tower holds the suspension arm, and the suspension arm holds the nacelle. To facilitate safer and better access to the nacelle or drive train, the suspension arm is configured as a platform to provide support for personnel e.g. during maintenance and repair of the nacelle.

Abstract: A steam turbine power generation facility and an operation method of such facility not only overcome the thermal elongation difference between a revolving body and a stationary body of a turbine so as to shorten start-up time but also suppress the efficiency of such facility from deterioration. The steam turbine power generation facility includes a boiler to generate steam; a high-pressure turbine into which the steam generated by the boiler flows; an intermediate-pressure turbine into which steam worked at the high-pressure turbine flows; and a low-pressure turbine into which steam worked at the intermediate-pressure turbine flows, in which the high-pressure turbine and the intermediate-pressure turbine are respectively provided with a heating section which is formed by communicating through the high-pressure turbine and the intermediate-pressure turbine, and further includes a pipe to make the steam worked at the high-pressure turbine flow into the heating section.

Abstract: A portable blowing device includes a body and fans arranged in the body. Air channels are arranged in the body and extend in the length direction of the body to allow airflow to pass through. Wind shields are arranged in the air channels, and a periphery of the wind shield is closely connected with a side wall of the air channel so that a sub-air channel is formed between the wind shield and the side wall of the air channel. Air outlets are formed in the side wall for communicating with outside and the sub-air channel, and airflow generated by the fan can enter the sub-air channel and then exits the air outlets. Because of the reduced volume of the sub-air channel, the airflow is concentrated after entering the sub-air channel, and airflow exiting the air outlets is strengthened, so that the cooling effect and the user experience are improved.

Abstract: Disclosed herein is a power generating apparatus for extracting energy from flowing water. The apparatus comprises a buoyancy vessel, and a turbine assembly coupled to the buoyancy vessel which comprises a turbine rotor mounted to a nacelle, and a support structure. The turbine assembly is pivotally moveable between a first position and a second position. When the power generating apparatus is floating on a body of water, in the first position the nacelle is fully submerged below the water surface; and in the second position at least a part of the nacelle projects above the water surface. Movement of the turbine assembly from the first position to the second position is buoyancy assisted, for example by providing the turbine assembly with positive buoyancy or selectively increasing its buoyancy.

Abstract: A fan frame body with damping structure and a fan thereof. The fan frame body includes a fan frame main body having a first opening, a second opening, a flow way and a base section. The first and second openings are respectively positioned at the upper and lower ends of the fan frame main body. The flow way is disposed between the first and second openings in communication with the first and second openings. The base section is disposed at the second opening. A bearing cup and multiple static blades are perpendicularly disposed on the base section. Two ends of the static blades are respectively connected with the base section and the fan frame main body. Multiple damping structures are annularly disposed on an inner wall of the fan frame main body. The damping structures are raised body structures or recess structures.

Abstract: A method of fabricating a composite material casing of varying thickness for a gas turbine includes using three-dimensional or multilayer weaving to make a fiber texture in the form of a strip; winding the fiber texture as a plurality of superposed layers onto a mandrel of profile corresponding to the profile of the casing to be fabricated, so as to obtain a fiber preform of shape corresponding to the shape of the casing to be fabricated; and densifying the fiber preform with a matrix. During winding of the fiber texture on the mandrel, a textile strip is interposed between the adjacent turns of the fiber texture, the textile strip presenting a width that is less than the width of the fiber texture and defining a retention zone of the casing.

Abstract: A method for controlling a fan group in order to generate a predefined total volumetric flow. The group of fans has a plurality of individual fans operated in parallel. Each generates an individual volumetric flow. The group of fans is divided into at least a first and a second control group. Each group has at least one fan. The individual volumetric flow of at least one fan of the first control group is increased by adjusting into a range of optimum efficiency by a speed change. This maintains constant flow. The individual volumetric flow of at least one fan of the second control group is reduced accordingly by a rotational speed reduction. All the fans contribute to the total volume flow at all times and no fan of the second control group will be switched off at any time.

Abstract: A blower includes a fan that sends out air, a guiding member that guides air moving towards the fan or the air sent out by the fan, and a vibration suppressing member that is provided on a side opposite to a side where the guiding member is provided with the fan interposed therebetween, and that reduces vibration of the fan.

Abstract: A compressor case for a gas turbine engine includes an annular body that extends circumferentially around a center axis and extends axially along the center axis. A first bleed manifold is formed on an outer surface of the annular body and encloses a first plenum. A second bleed manifold is formed on the outer surface of the annular body and is axially aft of the first bleed manifold. The second bleed manifold encloses a second plenum. A bleed inlet extends through the annular body and into the first bleed manifold. Cooling passages are formed in the annular body, and each of the cooling passages extends from the first plenum to the second plenum and fluidically connects the first plenum to the second plenum.

Abstract: A rotary machine includes a rotating shaft which is rotatably provided around an axis, a casing which covers the rotating shaft from an outside in a radial direction and in which a gas flow path extending in a circumferential direction is formed, a drain pipe which is connected to a lower portion in a vertical direction of the casing and communicates with the gas flow path, an adjusting valve which is provided in the drain pipe and adjusts a flow state of a fluid in the drain pipe, and a gas flow pipe which is connected to the drain pipe at a position closer to a connection portion between the casing and the drain pipe than the adjusting valve and through which the seal gas flows.

Abstract: The portable ceiling fan is a fan that removably attaches to a ceiling. The portable ceiling fan magnetically attaches to the ceiling. The portable ceiling fan is independently powered. By independently powered is meant that the portable ceiling fan can operate without a direct connection to an external power source. The portable ceiling fan comprises a ceiling fan, a mounting plate, and a control system. The mounting plate attaches to the ceiling with an adhesive. The mounting plate magnetically attaches to the ceiling fan such that the mounting plate attaches the ceiling fan to the ceiling. The control system remotely controls the ceiling fan such that the ceiling fan can be turned on and off without requiring physical access to the ceiling fan.

Abstract: A turbocharger turbine wheel includes a hub; and blades that extend outwardly from the hub, where each of the blades includes a shroud edge, a leading edge, a trailing edge, a pressure side, and a suction side, where the shroud edge includes a minimum axial coordinate position where the shroud edge meets the leading edge, and a maximum axial coordinate position where the shroud edge meets the trailing edge, and where, between the minimum axial coordinate position and the maximum axial coordinate position, each of the blades includes a first lean angle at a first axial coordinate position defined with respect to a first radial line, a second lean angle at a second axial coordinate position defined with respect to a second radial line, and a lean angle inflection region at an inflection axial coordinate position that is between the first axial coordinate position and the second axial coordinate position.

Abstract: A turbine nozzle for a gas turbine engine includes a plurality of nozzle segments that are configured to be assembled into a full ring such that each one of the plurality of nozzle segments is adjacent to another one of the plurality of nozzle segments. Each one of the plurality of nozzle segments includes an endwall segment and a nozzle vane. The turbine nozzle includes a feather seal interface defined by endwall segments of adjacent ones of the plurality of nozzle segments. The feather seal interface is defined along an area of reduced pressure drop through a pressure field defined between adjacent nozzle vanes of the plurality of nozzle segments to reduce leakage through the plurality of nozzle segments. The turbine nozzle includes a feather seal received within the feather seal interface that cooperates with the feather seal interface to reduce leakage through the plurality of nozzle segments.

Abstract: A gas turbine engine according to an example of the present disclosure includes, among other things, a rotor and a vane spaced axially from the rotor, and a blade outer air seal spaced radially from the rotor. At least one of the rotor and the vane includes an airfoil section extending from a platform. At least one of the airfoil section, the platform and the blade outer air seal includes a first cavity extending in a first direction, the first cavity defining a reference plane along a parting line formed by a casting die, and a plurality of trip strips including a first set of trip strips distributed in the first direction along a surface of the first cavity and on a first side of the reference plane, each of the plurality of trip strips defining a respective groove axis extending longitudinally between a first end and an opposed, second end of a respective one the plurality of trip strips, and the groove axes being oriented with respect to a pull direction of the casting die.