Abstract: A two blade row inducer for a low pressure pump in a turbopump of a rocket engine. The inducer includes a first set of blades and a second set of blades or partial blades in which the partial set of blades is covered with a shroud and the shroud includes a row of turbine blades extending outward to form a turbine to drive the inducer. The first set of blades is spiral or screw thread blades that end just upstream from the leading edges of the second set of blades covered with the shroud. In another embodiment, the screw thread blades can extend toward the aft end of the inducer and in-between adjacent partial blades in which the shroud also covers the aft ends of the screw thread blades. A second fluid reacts with the turbine blades to rotate the inducer and pump the first fluid.

Abstract: A fan-turbine rotor assembly (24) for a tip turbine engine (10 )includes a fan hub (64) with an outer periphery (112) scalloped by a multitude of elongated openings (114) which extend into a fan hub web (115). Each elongated opening defines an inducer receipt section (117) to receive an inducer section (66)and a hollow fan blade section (72). An inducer exhaust from each inducer section is located adjacent a core airflow passage (80) within each fan blade section to provide communication therebetween.

Abstract: A vertical axis wind turbine has a stationary circular core and a rotor rotatably supported about the stationary core. The rotor has a radially extending rotor arm with a wind engaging blade locate at its distal end. The blade has at least two straight blade sections of which at least one blade section is inclined obliquely at a first angle.

Abstract: A tip turbine engine (40) provides a peripheral combustor (30) with a more efficient combustion path through the combustor and through the tip turbine blades (34). In the combustor, the core airflow is received generally axially from compressor chambers in hollow fan blades (28) and then turned radially outwardly into a combustion chamber (112), where it is then mixed with the fuel and ignited. The combustor has a combustion path extending axially from a forward end of its combustion chamber through a combustion chamber outlet (122) and through a turbine (32) mounted to the fan. Thus, when the core airflow begins to expand in a high-energy gas stream, it has a substantially axial path from the combustion chamber through the turbine.

Abstract: An impeller includes a hub, a plurality of first blades, and a plurality of second blades. The first blades are disposed around the hub. The second blades are disposed between the first blades. The lengths of the second blades are shorter than those of the first blades. The impeller can avoid the airflow reflux and have good airflow efficiency.

Abstract: Installing large-sized wind turbines creates numerous challenges and limitations, hindering acceptance of wind generated energy. With small-sized wind turbines, such hindrances are omitted or minimized. Sized ever smaller, more small-sized wind turbines may be installed per installation. Accordingly, a method and corresponding apparatus for maximizing wind energy gathering potential of a plurality of wind turbines, each wind turbine having a sweep height, for a given location is provided. The present invention includes sizing sweep heights of substantially all wind turbines of the plurality of wind turbines to intersect at least one horizontal plane unique from horizontal planes intersected by a sweep height of at least one immediately adjacent wind turbine.

Abstract: A first motor rotates, in one of two rotating directions, the first impeller including a plurality of front blades in a suction opening portion of a housing. The second motor rotates, in the other rotating direction opposite to the one rotating direction, the second impeller including a plurality of rear blades in a discharge opening portion of the housing. A plurality of stationary blades are arranged between the first impeller and the second impeller in the housing. When the number of the front blades is N, that of the stationary blades is M, and that of the rear blades is P, their relationship is defined as N>P>M. A length L1 of the front blades measured in an axial direction is set longer than a length L2 of the rear blades measured in the axial direction.

Abstract: A fan comprises an impeller and a motor. The impeller has a hub, a plurality of blades and a plurality of reinforced elements. The blades are disposed around the hub. At least one reinforced element is disposed on the active surfaces of two adjacent blades. The blades and the reinforced elements are integrally formed as a single piece. The motor connects to the impeller for driving it to rotate.

Abstract: A rotary body for use in a turbo machine includes a hub having an outer edge and a plurality of slots formed in the outer edge, the slots having first and second spaced-apart opposing inner surfaces extending from the outer edge to a depth within the hub, and a plurality of blades secured to the outer edge of the hub, the slots and the blades being arranged such that at least two of the blades are positioned between each pair of adjacent ones of the slots.

Abstract: In an exhaust gas turbocharger for an internal combustion engine having a turbine wheel connected, by means of a shaft, to the compressor wheel of a compressor which includes a variable inlet geometry comprising a plunger and a sleeve-shaped partition for controlling an auxiliary duct leading radially to the compressor wheel, which is provided with compressor wheel blades to which air is supplied axially via an axial inlet passage and radially via a radial wheel inlet area, the compressor wheel includes a contoured ring provided at its outer circumferential surface with auxiliary blades disposed over, and aligned with, the compressor wheel blades in the radial and the axial wheel inlet region of the compressor wheel.

Abstract: An axial tip turbine driven pump in which a first fluid pumped by an inducer is driven by a second fluid that reacts with a turbine blade extending from a shroud on the inducer. The inducer includes a set of screw thread blades and a second set of partial blades that are covered by a shroud in the aft section of the inducer. A row of turbine blades extends from the shroud and into a manifold that forms the outer casing for the pump. The fluid flow through the manifold reacts with the turbine blades and drives the inducer to pump the fluid from the inlet and through guide vanes downstream from the inducer. The fluid passing through the turbine blades is collected in an outlet collector manifold and discharged into the fluid flowing through the guide vanes. The inducer with the turbine blades is rotatably supported within the housing formed by the guide vane support member and the manifold casing. The swirl flow direction of the turbine blades is opposite to that of the swirl flow in the inducer.

Abstract: A compressor wheel (20) for an air boost device and a method for designing the wheel are provided. The compressor wheel (20) comprises a hub (24) and a plurality of blades (22, 23) connected to the hub (24). The plurality of blades (22, 23) have a ratio (f/N) of natural frequency to maximum rotational speed of less than 4.0 and are made from a titanium alloy. The plurality of blades (22, 23) can comprise a plurality of full blades (22) and a plurality of splitter blades (23).

Abstract: A wind turbine rotor with a vertical rotation axis connected to a hub having at least two horizontal supports, on the ends of which are tightly fixed blades, each consisting of two wings joined together, with a symmetrical or concavo-convex airfoil with the airfoil's chord lengths and thickness diminishing toward both wing ends. The rotor blade's upper and lower wings are radially deflected from the central zone outwards. The chord length of both wing ends and the chord length in the central zone are approximately inversely proportional to the radii of its location in relation to the axis of the rotor's rotation. The deflecting angle of the lower wing can be greater than the deflecting angle of the upper wing or the length of the lower wing can be greater than the length of the upper wing. These specifications provide uniform wind power consumption along the wing's length, increasing the efficiency of a wind turbine and its service life.

Abstract: A fan rotor capable of avoiding coincidence will include a fan hub comprising one or more slots each designed to receive a fan blade; and one or more fan blades disposed within the slots. One or more slots will comprise an RZ? baseline and have one or more second fan blades disposed therein while another set of slots will have an RZ baseline having one or more first fan blades disposed therein. The tips of the second fan blades will be positioned at a distance farther from the fan hub than the tips of the first fan blades disposed, which when implemented in a turbofan engine will avoid coincidence occurrences.

Abstract: A frequency mistuned integrally bladed rotor (IBR) for a gas turbine engine comprises a hub and a circumferential row of blades of varying frequency projecting integrally from the hub. Each blade in the row alternate with another blade having a different pressure surface definition but similar suction surface, leading edge and trailing edge definitions.

Abstract: A vertical axis wind turbine which includes a rotor having three radially extending blades spaced at even intervals about a central axis. Each radially blade having an outer edge that lies on an imaginary circle of a first diameter. Each radially extending blade including a plurality of spaced airfoil sub-blades separated by gaps for the passage of air therethrough. Each of sub-blade having a leading vertical edge, and a trailing vertical edge and being positioned with the trailing vertical edge along a common radius line of the imaginary circle. Each sub-blade is skewed such that its cord line is rotated negative 45 degrees with respect the radius of the imaginary circle. The airfoil sub-blades maximize energy production by creating a secondary wind flow of a higher velocity for impingement upon blades of the rotor, and utilize backpressure during the second half of a rotation cycle to efficiently break the rotor against overspeed.

Abstract: The invention relates to a radial fan impeller (1), in particular for using in gas fans with a steep fan characteristic curve, with the following features: with a plurality of blades (2) distributed around the periphery; viewed in the radial direction, the blades (2) extend from an inner inlet region (4) to an outer discharge region (6); the blades (2) extend axially, i.e.

Abstract: A centrifugal impeller employed in a centrifugal machine, includes a main body, the main body generally being conical and defining a shaft bore in a center portion thereof; and a plurality of blade groups evenly arranged surrounding the shaft bore in sequence, each of the blade groups having a plurality of blades wherein neighboring blades having an interval angle, and the number and corresponding interval angles of the blades of different blade groups are identical. The present impeller structure can be employed to distribute the concentrated energy of the discrete tones noise of the blades, which is generated by the high-speed rotation impeller, and further to reduce the operating tones noise.

Abstract: A suction stage for a pump with a centrifugal wheel, the suction stage including a rotational impeller equipped with a hub and arranged upstream of the centrifugal wheel, the suction stage further including a diffuser arranged between the impeller and the centrifugal wheel, the diffuser including a plurality of blades. The hub has a downstream surface extending axially so as to converge toward the centrifugal wheel, and the blades of the diffuser have free ends, the blades protruding radially toward the downstream surface.

Abstract: A FLADE fan assembly includes radially inner and outer airfoils extending radially inwardly and outwardly respectively from an annular shroud circumferentially disposed about a centerline. Inner and outer chords extend between inner and outer leading and trailing edges of inner and outer airfoil cross-sections of the radially inner and outer airfoils respectively. Inner and outer stagger angles between the inner and outer chords respectively at the shroud and the centerline are different. The radially outer airfoils may outnumber the radially inner airfoils and particularly by a ratio in a range of 1.5:1 to about 4:1. Load paths or radii may extend radially through the inner and outer airfoils and through the rotating shroud between the inner and outer airfoils and may pass near or through the inner and outer leading edges and through the inner and outer trailing edges.

Abstract: An array of blades for use in a turbomachine is provided comprising a plurality of blades mounted to a rotor disk. A plurality of first blades form a first set of blades and a plurality of second blades form a second set of blades. A blade-to-blade flow field defined between successive ones of the first set of blades is interrupted by the second set of blades to form an asymmetric blade-to-blade flow field around the array of blades. The trailing edges of the second set of blades are positioned forwardly from a line connecting the trailing edges of the first set of blades such that shock forces in the flow field around the array of blades will generally impinge on a stable region of the first set of blades.

Abstract: A cooling fan for rotating machine having a sufficient cooling performance, mass production performance and easiness in mounting is provided.

Abstract: A heat dissipation device includes an electric fan having a fan impeller with a hub and a heat sink. A plurality of main blades and subsidiary blades extend radially and outwardly from the hub and alternate with each other. The electric fan forms an air inlet and an air outlet. The main blades have connecting portions on the hub which are extended towards a center of the hub at the air outlet. The subsidiary blades have a smaller radial length than the main blades. The subsidiary blades each have a connecting edge on the hub which is extended toward the center of the hub adjacent to the air outlet. The fan impeller drives more air to the center of the air outlet, whereby more air can flow to a center of the heat sink.

Abstract: A drain pump is provided that reduces the operating noise when the head is low. The drain pump has a pump casing, and an impeller. The pump casing has a drain inlet for sucking in drain water at a lower end part and a drain outlet for discharging drain water at a side part. The impeller has a shaft part disposed extending in a vertical direction inside the pump casing, a main blade disposed on the outer circumferential side of the shaft part, an auxiliary blade disposed on the lower side of the main blade, and a disc shaped dish part disposed between the main blade and the auxiliary blade. The dish part has an annular partition part extending upward from the outer circumferential edge part of the main blade, which is disposed at a position lower than the upper end part of the partition part.

Abstract: A turbine (100) of a turbine installation, especially a steam turbine of a steam turbine installation, includes at least one radial or diagonal turbine stage (120) with radial or diagonal inflow and axial outflow, and also at least one axial turbine stage (121-125) with axial inflow and axial outflow. The at least one radial or diagonal turbine stage (120) forms the first stage of the turbine (100) and the at least one axial turbine stage (121-125) is arranged downstream of the radial or diagonal turbine stage (121) as an additional stage of the turbine. The at least one radial or diagonal turbine stage (120) has a higher temperature resistance than the at least one axial turbine stage (121-125). The turbine (100) makes it possible to significantly increase the process temperature of the steam turbine installation, wherein measures for increasing the temperature resistance need only to be adopted for components of the radial or diagonal turbine stage (120).

Abstract: A vertical axis wind turbine (1) has a plurality of main blades (7, 8, 9) each of which is relatively thin. The blades (7, 8, 9) each have a thickened portion (28) extending along the trailing edge (18) of each blade (7, 8, 9). Furthermore, the or each blade (7, 8, 9) is fabricated in at least two sub-sections, (801-806) wherein at least one strut (50-52) extends between a central support column (13) and a junction where the blade sub-sections (801-806) abut.

Abstract: A centrifugal fan is provided. A hub covers a driving device. An impeller surrounds the hub and includes a first blade set and a second blade set. The first blade set surrounds the hub and includes a first combining portion, a second combining portion, and a plurality of first blades. The first and second combining portions are respectively connected to the first blades. The second blade set includes a third combining portion, a fourth combining portion, and a plurality of second blades. The third and fourth combining portions are respectively connected to the second blades. The first blade set is assembled with the second blade set by assembling the first combining portion with the third combining portion and assembling the second combining portion with the fourth combining portion.

Abstract: A heat-dissipating device includes a housing having at least one opening, and a rotor disposed in the housing and having a base, a hub, a first set of blades disposed around the hub, and a second set of blades disposed on the base for increasing air volume and stabilizing a blast pressure of airflow passing through the heat-dissipating device.

Abstract: A rotorcraft rotor includes a hub , a first blade having a first twistable structure secured to the hub by a first bolt and a first ring or washer , a second blade having a second twistable structure secured to the hub by a second bolt and a second ring or washer. The rotor includes a stop structure for preventing each ring or washer from turning relative to the hub or relative to the corresponding twistable structure.

Abstract: Embodiments include apparatus and methods of fluid energy conversion. One embodiment relates to a tube for a fluid energy converter. The tube may include a generally cylindrical and hollow body having an interior surface, an exterior surface, and a longitudinal axis. Another embodiment includes a fluid energy converter having a longitudinal axis and a rotatable tube coaxial about the longitudinal axis. In some embodiments, the rotatable tube converts kinetic energy in a fluid into rotating mechanical energy, or converts rotating mechanical energy into kinetic energy in a fluid.

Abstract: A ventilation assembly for a wind turbine rotor hub is provided, the ventilation assembly comprising a frame fixedly mountable to the rotor hub, the frame including at least one opening, and a cover for said at least one opening, the cover being mounted to said frame to be freely rotatable with respect to said frame, wherein the cover has at least one ventilation opening to allow the ingress and egress of air and has a shielding member for shielding the at least one ventilation opening against ingress of liquid running down the rotor hub.

Abstract: The invention relates to a side channel compressor, comprising a housing shell and a running wheel. The running wheel is mounted to be rotatable with respect to the housing shell to provide two annular sealing areas between the housing shell and the running wheel. The housing shell between the first and the second sealing area can be made of one piece. The gap dimensions of the first and second sealing areas can be adjusted by means of a disc spring/nut system or a wobble means. A fan impeller may be fixed on the motor shaft, and the housing shell can comprise cooling ribs, wherein the cooling ribs are arranged and formed such that the air conveyed by the fan impeller sweeps through the cooling ribs. One of the annular sealing areas can include a dead volume chamber. The housing shell may be a casting or a machined extruded profile.

Abstract: An impeller applied to a centrifugal fan includes a base plate, a hub and a plurality of first blades. The hub is connected to the base plate and the first blades are disposed on the base plate with respect to the hub as a center. Furthermore, the hub has a plurality of second blades disposed around its outer wall to enhance its performance. A centrifugal fan including the impeller is also disclosed.

Abstract: An impeller pump including a body and a cover assembled onto the body to form a housing. The body has a fluid inlet and a fluid outlet and an opening for receiving a rotating drive shaft. An impeller is rotatably positioned in the housing with paddles at a periphery thereof. The impeller includes a sleeve with a central pocket formed therein for receiving a drive shaft, a circumferential support ring, and a plurality of radially extending paddles extending from the circumferential support ring. The body and cover define an annular space circumferentially extending around an interior of the housing for receiving the paddles of the impeller. The cover has a wall portion enlarging the annular space in the housing through a portion of the circumference of the annular space.

Abstract: A fan includes a frame, a motor and an impeller. The motor is disposed on the frame and coupled to the impeller to drive the impeller to rotate. The impeller includes a hub, a plurality of blades and an air exhausting structure. The hub has an opening formed on a top portion of the hub. The blades are disposed around the hub. The air exhausting structure is disposed in the opening for discharging hot airs generated by the motor out of the hub.

Abstract: A multi-blade fan including a spirally-shaped casing having an inlet and an outlet; an electric motor disposed inside the casing; a main plate provided perpendicular to a rotation axis of the electric motor and having a ventilation hole; first blades disposed at a side of the inlet of the main plate; and second blades disposed at an opposite side of the inlet of the main plate. Herein, a diameter of the main plate is smaller than an outer diameter of the first and second blades and is larger than an inner diameter of them. Furthermore, an outlet angle of any one or both of the first blade and the second blade is sequentially changed in an axis direction.

Abstract: A heat-dissipating mechanism for a motor includes a rotor and a stator base. The rotor rotates with respect to the stator base and includes a casing and a hub. The casing has a side portion and a bottom portion, and at least one opening is disposed at the bottom portion. The hub is disposed on the casing, for preventing an external particle from entering the rotor. The hub includes a plurality of separation ribs and when the hub is disposed on the casing, a heat-dissipating passage is formed between every two adjacent separation ribs and the side portion of the casing.

Abstract: A method to introduce a deliberate mismatch into a turbomachine bladed wheel so as to reduce vibration amplitudes of the wheel in forced response. The method includes a step of determining an optimum value of the standard deviation for the mismatch as a function of operating conditions of the wheel inside the turbomachine, with respect to the maximum vibration amplitude response required on the wheel. The method further includes a step of at least partly placing blades with different natural frequencies on the wheel such that the standard deviation of the frequency distribution of all blades is equal to at least the mismatch value, the mismatch value being determined statistically.

Abstract: Exhaust apparatus for exhausting “dirty” exhaust gases accept a core flow of such exhaust gases and combine that with an annularly-surrounding “rooftop” flow of ambient air for diluting the exhaust gases as well as expelling the diluted flow in a forcibly expelled plume in order to ensure that the “effective” expulsion distance of the expelled diluted flow is at least the physical length of the exhaust apparatus plus the gains gotten from efflux velocity and flowrate.

Abstract: A centrifugal blower includes a scroll casing defining a scroll passage having a suction port and a discharge port. A fan member is disposed rotatably in the scroll casing, and the fan member is rotated by a motor. The fan member includes a plate member having at least a first circular plate portion and a second circular plate portion which are arranged in an axial direction to have a step shape in cross section, and a plurality of blades which are arranged at an outer peripheral portion of the plate member and extend in the axial direction. Furthermore, the plate member is arranged to change a flow direction of air drawn by the fan member from the suction port in an axial direction, to a radial outside. Because the plate member is arranged in the step shape in cross section, fan noise due to disturbed air flow can be restricted.

Abstract: A cylindrical rotor with internal blades, configured by a ring of variable diameter and length according to necessity, as well as the blade quantity, pitch, surface and angle in its interior, being the assembly made of different materials.

Abstract: A rotary body for use in a turbo machine includes a hub having an outer edge and a plurality of slots formed in the outer edge, the slots having first and second spaced-apart opposing inner surfaces extending from the outer edge to a depth within the hub, and a plurality of blades secured to the outer edge of the hub, the slots and the blades being arranged such that at least two of the blades are positioned between each pair of adjacent ones of the slots.

Abstract: The invention relates to a radial fan impeller (1), in particular for using in gas fans with a steep fan characteristic curve, with the following features: with a plurality of blades (2) distributed around the periphery; viewed in the radial direction, the blades (2) extend from an inner inlet region (4) to an outer discharge region (6); the blades (2) extend axially, i.e.

Abstract: An air boost device such as a turbocharger, wherein the compressor wheel thereof is re-designed to permit die inserts (20), which occupy the air passage and define the blades (4, 5) during a process of forming a wax pattern (21) of a compressor wheel, to be pulled without being impeded by the blades. This modified blade design enables the automated production of wax patterns (21) using simplified tooling. The compressor wheel improves low cycle fatigue, withstands high temperatures and temperature changes, and permits operation at high boost pressure ratio while, on the other hand, having low weight, low inertial drag, and high responsiveness.

Abstract: A ventilation exhaust fan is provided, and in some embodiments includes a housing adapted to interchangeably receive a first module having a first support plate and a second module having a second support plate. Each of the first and second modules have at least one of a motor and a fan wheel operable to generate a flow of fluid into and out of the exhaust fan. At least one of the motor and fan wheel of the first module is different from the motor and the fan wheel of the second module, respectively.

Abstract: A first motor 25 rotates, in one of two rotating directions, the first impeller 7 including a plurality of front blades 28 in a suction opening portion 15 of a housing 59. The second motor 49 rotates, in the other rotating direction opposite to the one rotating direction, the second impeller 35 including a plurality of rear blades 51 in a discharge opening portion 57 of the housing 59. A plurality of stationary blades 61 are arranged between the first impeller 7 and the second impeller 35 in the housing 59. When the number of the front blades 28 is N, that of the stationary blades 61 is M, and that of the rear blades 51 is P, their relationship is defined as N>P>M. A length L1 of the front blades 28 measured in an axial direction is set longer than a length L2 of the rear blades 51 measured in the axial direction.

Abstract: A blower is formed with multiple sets of rotatable rings of blades coupled to each other. Multiple inlet rings are correspondingly coupled to the multiple sets of rotatable rings of blades. In one embodiment, the blades may be forward facing blades and include a volute to accomplish pressure recovery. In further embodiments, the blades are backward facing. Such backward facing blades are designed to provide a static pressure rise. In some embodiment, three or more rings of blades with corresponding inlet rings are utilized.

Abstract: A drain pump is provided that reduces the operating noise when the head is low. The drain pump has a pump casing, and an impeller. The pump casing has a drain inlet for sucking in drain water at a lower end part and a drain outlet for discharging drain water at a side part. The impeller has a shaft part extending in a vertical direction inside the pump casing, a main blade disposed on the outer circumferential side of the shaft part, an auxiliary blade disposed on the lower side of the main blade, and a disc shaped dish part disposed between the main blade and the auxiliary blade. The dish part has an annular partition part extending upward from the outer circumferential edge part of the main blade, which is disposed at a position lower than the upper end part of the partition part.

Abstract: The invention relates to a propeller and an apparatus to modify a propeller that provide new propeller performance characteristics. In a preferred embodiment, the propeller includes two blade sets wherein the blades in the sets of distinct geometries from the blades in the corresponding set(s). In another preferred embodiment, a propeller hub ring extender is selectively secured to at least one propeller hub.

Abstract: A cooling fan includes an impeller which comprises a plurality of radially extending blades, each of which includes a blade hub, a blade tip and a blade midspan approximately midway between the hub and the tip. In addition, each blade includes a camber of between about 60° and 90° at the blade hub, between about 15° and 40° at the blade midspan and between about 15° and 40° at the blade tip.