Abstract: The invention relates to a blower wheel, especially a plastic blower wheel for a cylindrical rotor radial fan for the heating and air-conditioning systems of a motor vehicle. Said blower wheel comprises a plurality of blades (2), and the flow channel (3) between two blades (2) is embodied in such a way that it is convergent on the inflow side, divergent on the outflow side, and distinctively shaped.

Abstract: An improved wind turbine device with energy storage comprises a turbine rotor with rotatable vertical shaft, at least one bearing for said vertical shaft, and multiple rotor vanes disposed symmetrically for rotation about the vertical shaft. Each of said multiple rotor vanes is substantially box-shaped with four solid sides and a front and rear side disposed in a radial vertical plane. The front side to each vane is substantially open faced and the rear side has an opening covered by a plurality of flaps. Each of said flaps is capable of moving with the directional passage of wind through the vane.

Abstract: An air distribution system for manipulating a boundary layer of air across a wind turbine rotor blade. The wind turbine rotor blade includes at least one sidewall that defines a cavity therein. The sidewall extends between a leading edge and an axially-spaced trailing edge, and defines a chordwise axis between the leading edge and the trailing edge. The air distribution system includes a plurality of bleed flow assemblies that are positioned within the rotor blade and are configured to discharge air into the boundary layer to reduce a separation of the boundary layer from the rotor blade. Each bleed flow assembly of the plurality of bleed flow assemblies includes a bleed flow conduit that is coupled to an inner surface of the sidewall and is oriented with respect to the chordwise axis between the leading edge and the trailing edge. The bleed flow conduit is configured to channel air through the rotor blade.

Abstract: A system for controlling flow through a rotor includes an inlet port in the rotor and an outlet port in the rotor. The outlet port is in fluid communication with the inlet port. A variable orifice is disposed in at least one of the inlet or outlet ports. A method for controlling flow through a rotor includes diverting a process fluid and flowing the diverted process fluid through a fluid passage in the rotor. The method further includes reducing the flow of the diverted process fluid through the fluid passage in the rotor.

Abstract: A hollow rotor core assembly for a wind turbine with at least one set of cylindrical stacks having a plurality of guiding vanes on the internal surface of the cylindrical stacks, having at least one set of air openings to accept airflow into the hollow rotor core for creating when in rotation a vortex inside the hollow rotor core, having at one end a partial blocking device as such to allow the exhaust of only a fraction of the peripheral portion of the vortex and to redirect the remaining central portion of the vortex towards the other end of the hollow rotor core where the bulk of the airflow will be exhausted from the hollow rotor core.

Abstract: A foil, utilized such as an airfoil or hydrofoil, characterized by a duct moving relative to a mass of fluid. The duct channels the flow of the portion of the fluid through which the duct is moving. A constriction within the duct increases the speed of the fluid constrained within the duct and thereby produces a pressure drop. The pressure drop induces a mass of fluid external to the duct and approximately parallel to the duct to accelerate into the duct. The acceleration of the external fluid mass into the duct generates a resultant force vector, which can be utilized, varied, and controlled to improve performance and reduce drag.

Abstract: A propulsion device using fluid flow quickly discharges the vortex flow generated on an upper surface of the propulsion device to the outside to improve the propulsion and thrust of transportation means provided with the propulsion device. For this purpose, the propulsion device includes a fluid storage unit in which a downwardly curved fluid storage surface is formed between a first inlet line and a first outlet line such that a fluid storage space is formed on the fluid storage surface. A fluid flow unit in which a downwardly curved fluid flow surface is formed between a second inlet line and a second outlet line which are outwardly and backwardly inclined such that a fluid flow space is formed on the fluid flow surface. The-fluid flow surface adjacent to the second outlet line becomes gradually flattened as it extends outwardly.

Abstract: A fluid flow machine includes a main flow path in which at least one row of blades (3, 4) is arranged, and a blade shroud (2) which forms a confinement of the main flow path in the area of a blade row (3, 4) and is arranged in a recessed cavity (10) of a surrounding physical structure (11). The cavity (10) so formed between the shroud (2) and the surrounding physical structure (11) is provided with an annular connection (14) to the main flow path at least on the outflow side of the blade shroud (2), and with the blade shroud (2) being penetrated by at least one secondary flow path (16) which, commencing at a location of high pressure on the shroud (2), issues at a surface wetted by the main flow.

Abstract: A system of operating a wind turbine that is capable of extending electricity production, such as in low and high wind speed environments. In accordance with various embodiments, a wind turbine speed maintenance system has a wind turbine with at least one turbine blade that has a trailing edge with a speed feature. The speed feature is connected to a controller and a pressure vessel, the controller selectively activating the speed feature in response to the turbine blade reaching a predetermined radial velocity.

Abstract: A blade of a fluid-flow machine has at least one cavity 2 arranged in the blade 1, with the cavity 2 connecting to a fluid supply, and at least one outlet opening 3 connecting the cavity 2 to a flow path, in which the blade 1 is arranged. The outlet opening 3 is of a nozzle-type design and essentially inclined in a direction of a main flow extending longitudinally to a corresponding surface of the blade 1. The outlet opening 3 extends over at least a part of the blade 1 height and the outlet opening 3 forms a step in a contour of the blade 1 profile, with a fluid jet issuing from the outlet opening 3 essentially tangentially attaching onto the blade surface.

Abstract: An exemplary fan assembly includes a fan and a muffler. The fan includes an air outlet. The muffler is disposed at the air outlet of the fan. The muffler includes a base plate. The base plate defines vents therein and blades thereon corresponding to the air outlet of the fan. The blades extend from the base plate toward the fan. An electronic device incorporating the fan assembly is also provided.

Abstract: A turbine blade system relating to a tip device appended to the blade tip of a turbine. The tip device controls the flow of air to ultimately reduce noise signatures while increasing aerodynamic efficiency. Passive or actively controlled configurations also permit the user to adjust the pitch angle of the tip device for maximum efficiency rather than making less effective adjustments to the entire turbine blade.

Abstract: A wind turbine blade includes a porous window defined in the suction side of the blade. The porous window is permeable to airflow from within an internal cavity of the blade through the suction side. A deployable cover member is configured with the porous window and is variably positionable from a fully closed position wherein airflow through the porous window is blocked, to a fully open position wherein airflow is established through an entirety of the porous window. An actuating mechanism is disposed within the internal cavity of the blade and is configured with the cover member to move the cover member between the fully closed and fully open positions in response to a control signal.

Abstract: A turbine rotor blade with a tip shroud that has a baffle seal with a knife edge to form a seal with a honeycomb seal of the shroud, where the tip shroud includes larger ribs that form separate compartment each with smaller ribs that form serpentine flow cooling circuits within the compartment to provide cooling for the tip shroud. Two hard faces each include an impingement cavity connected to one of the serpentine to provide impingement cooling to the backside wall of the hard face surface. The tip shroud periphery includes film cooling holes to discharge the spent cooling air from the serpentine circuits out from the tip periphery. A row of baffle seal cooling holes connect the serpentine circuit to the pressure side of the knife edge to provide cooling for the baffle seal.

Abstract: A rotor blade for a gas turbine engine, comprising an aerofoil having pressure and suction surfaces, leading and trailing edges, and an array of passages at a tip region of the aerofoil. The passages extend from the pressure surface to the suction surface of the aerofoil and are disposed so that the array creates, in operation, a planar jet of gas issuing from the suction surface. The jet is inclined outwardly from the suction surface and towards the tip, and in the direction from the leading edge to the trailing edge. The jet inhibits migration away from the suction surface of a clearance vortex formed by leakage of air over the tip of the rotor blade.

Abstract: A method of operating a wind turbine is provided. The wind turbine has at least one rotor blade and an active flow control (AFC) system. The at least one rotor blade has at least one aperture defined through a surface thereof, and the AFC system is configured to modify aerodynamic properties of the at least one rotor blade by ejecting gas through the at least one aperture. The method includes operating the wind turbine in a first mode, determining an environmental condition surrounding the wind turbine indicative of fouling of the AFC system, and operating the wind turbine in a second mode different than the first mode based on the environmental condition. The second mode facilitates reducing fouling of the AFC system.

Abstract: A airfoil blade for vertical axis wind turbines is presented. The airfoil blade comprises an internal cavity, an upper blowing slot disposed on the airfoil blade, and a lower blowing slot on the airfoil blade, and further comprises a valve means for variably connecting the outside air to the internal cavity through the blowing slots to selectively produce a variable lift-drag condition of said airfoil blade.

Abstract: A pump impeller has two impeller bodies attached to each other. Each impeller body has an annular base wall and multiple partition protrusions separately formed on an inner surface of the base wall. Multiple outlet channels are respectively defined between the partition protrusions. Each outlet channel has a cross-sectional area decreasing from an inner end to an outer open end of the outlet channel. Thus, liquid flowing through the outlet channels does not become turbulent and a working efficiency of a pump with the pump impeller is certainly improved.

Abstract: A rotor for a wind energy turbine includes a hub defining an inner space and at least one rotor blade defining an inner space and having a tip and a root attached to the hub. The inner spaces of the hub and the at least one rotor blade are in fluid communication. The rotor further includes air flow means for causing air to flow out of the hub and into the at least one rotor blade.

Abstract: In this presentation, we study various aspects of the wind turbines or wind mills. We optimize the performances of both a single wind turbine and a wind farm, collectively. We study the nozzles on the blades and all the variations and accessories for the operation of a nozzle. We also explore flow patterns around the blades, the mechanisms to get air or other gasses to the blades, the couplers for the electrical connections and the gas connections, and the gaps, holes, channels, conduits, or openings on the body or structure of a tower. We also present various mathematical models and formulations for optimizations.

Abstract: A wind turbine rotor blade includes a pressure side and a suction side. At least one airfoil passage is defined through the blade between the pressure side and suction side. A respective cover is configured over the airfoil passage at each of the pressure and suction sides. The covers are actuatable between a closed position wherein the cover is flush with the respective pressure or suction side and an open position wherein the cover moves to open the airfoil passage.

Abstract: The present invention provides an aircraft having one or more fixed wings in a flying wing configuration, where the aircraft further includes a high performance co-flow jet (CFJ) circulating about at least a portion of an aircraft surface to produce both lift and thrust.

Abstract: An air distribution system for manipulating a boundary layer of air across a wind turbine rotor blade. The wind turbine rotor blade includes at least one sidewall that defines a cavity therein. The sidewall extends between a leading edge and an axially-spaced trailing edge, and defines a chordwise axis between the leading edge and the trailing edge. The air distribution system includes a plurality of bleed flow assemblies that are positioned within the rotor blade and are configured to discharge air into the boundary layer to reduce a separation of the boundary layer from the rotor blade. Each bleed flow assembly of the plurality of bleed flow assemblies includes a bleed flow conduit that is coupled to an inner surface of the sidewall and is oriented with respect to the chordwise axis between the leading edge and the trailing edge. The bleed flow conduit is configured to channel air through the rotor blade.

Abstract: The present invention is a windmill with blades with passageways for air to move radially outward from near the hub of the windmill to near the tip of the blades. It is thought that the centrifugal force from rotation of the blades will draw or force air into open passageways near the hub of the windmill, and throw the air out forcefully from openings near the tips of the blades. This way, an additional flow of air in or next to and along the blades is created by the rotating additional blades. This additional air flow may be used to move additional generator devices, for example, turbines in an interior space of the windmill support tower, or near the hub of the windmill, or near the tips of the blades. In one embodiment, a funnel shroud near the windmill hub directs additional air from the windward side of the windmill into the proximal end of the passageway near or around the windmill hub.

Abstract: An active flow control system for manipulating a boundary layer of air across a wind turbine rotor blade. The wind turbine rotor blade has at least one sidewall defining a cavity therein. The sidewall extends between a leading edge and an axially spaced trailing edge. The active flow control system includes an air discharge assembly that is coupled to the sidewall. The air discharge assembly is configured to selectively discharge air from within the wind turbine rotor blade into the boundary layer. An air suction assembly is coupled to the sidewall and to the air discharge assembly. The air suction assembly is configured to channel air from the boundary layer to the air discharge assembly.

Abstract: According to one embodiment of the present invention, a rotating blade, having a collision face that collides with fluid and is rotated by the flow of said fluid, has at least one flow path that has been caved in from said colliding face; said flow path is located forward with respect to said rotation direction so that it is located in the rear with respect to the inlet wherein said flow is introduced and said rotation direction, and it has an outlet from which said fluid exits. Here, the cross-sectional area of said inlet may be greater than the cross-sectional area of said outlet. In addition, the cross-sectional area of said inlet may gradually decrease toward said outlet.

Abstract: A wind turbine rotor blade includes a pressure side and a suction side. At least one airfoil passage is defined through the blade between the pressure side and suction side. A respective cover is configured over the airfoil passage at each of the pressure and suction sides. The covers are actuatable between a closed position wherein the cover is flush with the respective pressure or suction side and an open position wherein the cover moves to open the airfoil passage.

Abstract: A lift generating apparatus for a wind turbine rotor blade comprising a first sidewall and an opposing second sidewall coupled together at a leading edge and at a trailing edge. The lift generating apparatus includes at least one forward blade extension coupled to the rotor blade to define a first airflow channel between the forward blade extension and the rotor blade. The lift generating apparatus also includes at least one aft blade extension coupled to the rotor blade to define a second airflow channel between the aft blade extension and the rotor blade.

Abstract: An active flow control (AFC) system for use with a wind turbine is provided. The wind turbine includes at least one rotor blade having at least one manifold extending at least partially therethrough and at least one aperture defined through a surface of the at least one rotor blade. The at least one aperture is in flow communication with the at least one manifold. The AFC system includes an air intake duct configured to draw ambient air into the wind turbine, a self-cleaning air filter coupled in flow communication with the air intake duct and configured to filter the ambient air, and an AFC distribution system configured to eject the filtered air through the at least one aperture.

Abstract: A turbine blade includes an airfoil having first and second tip ribs extending along the opposite pressure and suction sides thereof. A tip baffle bifurcates the airfoil tip into two pockets, with a first pocket being laterally open at its aft end to recover leakage flow, and a second pocket being laterally closed.

Abstract: A vane for vertical axis wind power generator includes a vane body defining a rearward recess and having a front plate portion with a through hole; a first arcuate guide bar located in the recess with a second end connected to the vane body and a first end located in the through hole; an openwork screen fitted in the through hole and connected to the first end of the first arcuate guide bar; and a first movable baffle unit slidably fitted around the first arcuate guide bar and pivotally connected to the vane body to openably cover the openwork screen. When the rearward recess is against the wind, the first movable baffle unit covers the openwork screen for the rearward recess to effectively intercept the wind. When the rearward recess is before the wind, the first movable baffle unit naturally opens to reduce the air resistance to the vane.

Abstract: A gas turbine engine component has a leading edge and a trailing edge and a pressure side and a suction side. The pressure side and suction side extend between the leading edge and trailing edge. One or more cooling passageways extend through the airfoil and comprise a trunk extending from an inlet. At the inlet, there is an additional passageway adjacent the trunk and having at least one edge recessed relative to the trunk.

Abstract: A system and method provides for the manipulation of the aerodynamic characteristics of airfoils and other aerostructures using blowing and/or suction. This system and method uses one or more internal cavities located within an airfoil. An internal cavity is coupled to the exterior surface of the airfoil via one or more slots. A rotary actuator is incorporated into a slot. When the rotary actuator is rotated into a first position, it forms a channel that allows fluid to pass between the internal cavity and the air surrounding the airfoil. When the rotary actuator rotates into a second position, it prevents fluid from passing through the channel between the internal cavity and the air surrounding the airfoil.

Abstract: A mixing apparatus has a chamber, a shaft extending into the chamber, a motor drivingly interconnected to the shaft, a nozzle support affixed to the shaft and extending outwardly therefrom within the chamber, and a nozzle having an interior passageway affixed to the nozzle support such that the nozzle moves in the chamber as the motor drivingly rotates the shaft. The chamber has a multi-phase fluid therein. The nozzle moves through the fluid such that fluid is channeled through the interior passageway at a same rate that the nozzle moves through the fluid. Another nozzle can be affixed to the nozzle support diametrically opposite to the nozzle.

Abstract: A mixing apparatus has a chamber, a shaft extending into the chamber, a motor drivingly interconnected to the shaft, a nozzle support affixed to the shaft and extending outwardly therefrom within the chamber, and a nozzle having an interior passageway affixed to the nozzle support such that the nozzle moves in the chamber as the motor drivingly rotates the shaft. The chamber has a multi-phase fluid therein. A flow restrictor is affixed to an inner wall of said chamber so as to extend inwardly therefor. The flow restrictor is a plurality of flat panels arranged in spaced relation around the interior of the chamber and within a liquid phase of the multi-phase fluid.

Abstract: A turbine blade system relating to a tip device appended to the blade tip of a turbine. The tip device controls the flow of air to ultimately reduce noise signatures while increasing aerodynamic efficiency. Passive or actively controlled configurations also permit the user to adjust the pitch angle of the tip device for maximum efficiency rather than making less effective adjustments to the entire turbine blade.

Abstract: A de-icing and anti-icing arrangement for a Wind Energy Converting System (WECS), a WECS comprising a de-icing and anti-icing arrangement and a method for preventing and eliminating ice accretion on the rotor blades of a WECS are provided. The WECS comprises a tower, a rotor having a plurality of blades that rotate due to wind force, a nacelle including a first means for transforming the rotor's rotational movement to electric power, and a second means for permitting the flow of fluid from volumes defined by the rotor blades, the rotor blades comprising an external surface having openings in fluid connection with the volumes inside the blades for permitting the flow of fluid to the outside of the blades to fluid-thermodynamically interact with the wind hitting the part of the blade surface, and thereby prevent or eliminate the accretion of ice on the external surface of the blade.

Abstract: An example impeller includes: an impeller body in which an internal channel is formed, the internal channel extending inside the impeller body in a direction of a rotation axis spirally about the rotation axis to connect an inlet and an outlet; and at least one centrifugal vane provided in the impeller body. The internal channel including the inlet and the outlet has a predetermined passage diameter. An external channel is formed so as to continue to the outlet and go around the circumferential surface of the impeller body, the external channel being defined by the centrifugal vane and being recessed inward in the radial direction from the circumferential surface of the impeller body. At least a part in a flow direction of the external channel has a channel width in the direction of the rotation axis smaller than the width of the outlet.

Abstract: The invention relates to a turbine blade comprising a profiled vane around which working gas flows. The working gas cross-flows a front edge of the vane and flows away on a rear edge of the vane. The vane has a first and a second channel system for guiding two media separated from the turbine blade. Combustion taking place inside is reduced in a safe manner to maintain the service life of the turbine blade and to prevent damage in the gas turbine, such that a first outlet connected to the first channel system is arranged in the region of the rear edge for blowing out the first media into the working gas and a second outlet connected to the second channel system is arranged in the region of the rear edge for blowing out the second medium.

Abstract: A rotor blade has a tip with an outer face including at least two channels which each extend to an outlet in the vicinity of the trailing edge. Accordingly, gas leakage around the tip must cross at least three walls, at least in the vicinity of the uncovered turning region near the trailing edge of the blade. Leakage gas entering the channels will tend to create a vortex and pass along the channel to the outlet.

Abstract: A low noise axial flow impeller has a multi cellular form of construction comprising a multiplicity of individual axial flow channels disposed in a circumferential and radial array with respect to the axis of rotation. This increases the “blade passing frequency” as compared to a conventional impeller and since higher frequencies have lower energy for a given flow output the total amplitude of the noise generated can be reduced. For high total flow area coupled with low structural weight the channels are arranged in tessellating rings of equal numbers of channels, with channel cross sections based on hexagons (or truncated hexagons in the case of the channels in the innermost and outermost rings).

Abstract: The invention relates to machine building in particular to blade machines for air injection, in particular to fans and air blowers, and also to blades of different propulsion devices. The inventive method for increasing the blade (1) performance consists in producing a blade (1) in the form of a wing and in carrying out the boundary layer suction on the blade 1 surface on the opposite side with respect to the incoming air flow through a system of slotted holes (4). The blade (1) is provided with a thick airfoil profile. The air suction is carried out through the system of slotted holes (4) embodied along the blade (1) and into cavities (5) which are embodied under said holes (4) along the latter and each of which is provided with a central longitudinal hollow body arranged therein, said body forming an annular channel (7) in each cavities (5) in such a way that a vortex-like flow is generated by the incoming air flow in said channel.

Abstract: An airfoil is provided for a turbine of a gas turbine engine. The airfoil comprises: an outer structure comprising a first wall including a leading edge, a trailing edge, a pressure side, and a suction side; an inner structure comprising a second wall spaced from the first wall and at least one intermediate wall; and structure extending between the first and second walls so as to define first and second gaps between the first and second walls. The second wall and the at least one intermediate wall define at least one pressure side supply cavity and at least one suction side supply cavity. The second wall may include at least one first opening near the leading edge of the first wall. The first opening may extend from the at least one pressure side supply cavity to the first gap. The second wall may further comprise at least one second opening near the trailing edge of the outer structure. The second opening may extend from the at least one suction side supply cavity to the second gap.

Abstract: A novel rotor blade is presented with an integral tip portion from which two diverging blade portions extend to separated respective roots. The blade may have conventional airfoil sections, or may be made from flat or curved sheet material. The two rotor blade portions may have dissimilar angles of incidence. Leading edge holes or slots are located behind the leading edge of the blade. The two blade portions may have distinct angles of incidence.

Abstract: A turbomachine includes at least one rotor (6), at least one stator (7), and a casing (1), with the rotor (6) comprising several rotor blades (8) attached to a rotating shaft, and with the stator (7) being provided with stationary stator blades (9), the casing (1) being passed by a fluid flowing through the rotor (6) and stator (7). Provision is made for the removal of fluid on at least one blade (8, 9) of a blade row of the rotor (6) and/or the stator (7) on non-axially symmetrical, aerodynamically critical locations on blade tip and annulus surfaces (SRO).

Abstract: A blade for a rotor of a wind energy turbine includes opposite upper and lower faces, opposite leading and trailing edges connecting the upper and lower and at least one air outlet opening arranged on at least one of the upper face, the lower face and the trailing edge for discharging pressurized air into the air around at least one of the upper and lower faces and the leading and trailing edges.

Abstract: A cooled cast part has an exterior surface. A cooling passageway system extends from at least one inlet port to a plurality of outlet ports. The passageway system includes a first passageway to at least a first of the outlets and surrounding at least one post. The system includes a second passageway to at least a second of the outlets passing through the at least one post.

Abstract: A rotor for a steam turbine for working steam and including at least two rotor parts welded to one another using a circumferential, annular weld zone, which is closed in the circumferential direction. A cooling channel system is formed in the rotor and has at least one inlet flow channel, at least one outlet flow channel and at least one cooling channel. In order to simplify the integration of the cooling channel system in the rotor, the weld zone surrounds a cavity which forms a component of the cooling channel system and through which cooling steam flows.

Abstract: A method for enhancing effectiveness of a rotor blade of a wind energy device (a wind-wheel of electric generating unit), according to which a rotor blade is implemented in the form of a thick-airfoil wing, and a vortex system for controlling the boundary layer is arranged on the rear portion of the blade, upon the leeward, which system consists of longitudinal cavities having central bodies that define annular channels; the air being sucked from the cavities and central bodies through air-intakes into receivers. The air from the receivers, under the action of centrifugal forces generated by the rotating blade, is sucked towards the blade end. Within the cavities and on the blade's outer surface are positioned the plates that restrict streaming-down of the air flow along the blade.

Abstract: A hole diameter adjustment device for changing an existing diameter of a hole formed in a component to a smaller desired diameter includes an outer sleeve adapted for insertion within the existing hole, the first outer sleeve having an inner bore including a first tapered portion and an axially aligned first threaded portion; and an inner sleeve adapted for insertion within the outer sleeve, the inner sleeve having a tapered outer surface adapted to engage the first tapered portion of the outer sleeve, and an axially aligned second threaded portion adapted to engage the first threaded portion, the second sleeve formed with an internal bore of the smaller desired diameter.