Abstract: An air flow and filtration control system in the form of a headgear which is worn by a physician during a surgical procedure, a technician during an assembly process, or any other user wherein controlled air flow and air filtration is required or desired. The flow-through system includes a relatively rigid, open frame, skeleton headgear structure which substantially surrounds the head of the wearer. A fan is mounted in the headgear structure. The fan is positioned to move air through ducts formed in the headgear structure. A shroud (or hood) is draped over and attached to the headgear structure in such a fashion as to completely cover the headgear structure and to cover at least a portion of the wearer in order to maintain sterile or controlled conditions relative to the wearer. The shroud includes filtration areas which may encompass the entire shroud. The filtration areas may be disposed adjacent tot he fans when the shroud is placed over the headgear structure.

Abstract: This fan is provided with an impeller (1), having a hub (2), and with a casing surrounding the impeller (1). The impeller (1) has individual flow segments (4) connected to the hub (2) and to one another and in each case enclosing a flow duct (5), and a shaft connected to the hub (2) and extending along an axis (3). The object is to provide a fan which has an impeller which can be easily produced from a plastic and is suitable for comparatively high operating speeds. This is achieved by the flow segments (4) being connected with a form fit to the hub (2), and by the fastening of the flow segments (4) being reinforced by means of at least one shrouding (13, 14) of a prefabricated thermoplastic strip reinforced with continuous fibers, the thermoplastic strip having been briefly heated and fused with the layer respectively applied previously during the winding of the shrouding (13, 14).

Abstract: A pump body 10 of a drainage pump 1A comprises a pump chamber 12, inlet 15, and outlet 17. A rotary vane 300 mounted in the pump body 10 is coupled to a motor mounted above the pump body 10, and comprises a shaft 310 and four large-radial blades 320. Formed below the large-radial blades 320 are small-radial blades 350 to make a liquid at the inlet rise. Lower edges of the large-radial blades 320 are connected together by a disk 350 having an opening at the center and interceptively dividing the surface of the liquid rising from the inlet. Thus the amount of the liquid in contact with the large-radial blades 320 above the disk 350 decreases, and the load to the rotary vane decreases. At the same time, bubbles, noise and vibrations caused by bubbles also decrease. By surrounding the outer circumference of the large-radial blades 320 with a ring member, return water W5 moving back from the outlet 17 when the pump stops is damped by the wall member 360 and returns smoothly to the inlet 15.

Abstract: An impeller is for separating a conveyed stream of material. The impeller has a central rotatable hub with a plurality of blades extending radially therefrom. The hub and blades form a number of generally wedge-shaped material receiving spaces within the impeller. One set of spaces has a baffle arrangement which is configured to direct material in this set outwardly from the impeller on the upstream side of the baffle arrangement. Another set of spaces has a guide arrangement which is configured to guide the material in this set of spaces outwardly from the impeller on the downstream side of the baffle arrangement. The impeller is particularly useful for separating streams of particulates, such as wood chips, compressed shavings, or the like.

Abstract: A turbocharger compressor impeller structured as a combination elevated auxiliary blades fan surrounded by a curved inducer which provides a high gas volume low speed turbocharger compressor to deliver pressured gas into a combustion engine.

Abstract: A combination flywheel, fan and pulley assembly is provided having a three piece construction, namely a central hub, at least one metal disk, and a stamped sheet metal centrifugal fan. The central hub is provided with a first circumferential surface for supporting at least one metal disk and a centrifugal fan. The hub is further provided with a bore extending at least partially through the central hub to enable the hub to be mounted on the motor shaft. The centrifugal fan has a plurality of circumferentially spaced apart radial extending blades which project axially from a generally flat face. The fan and at least one disk are securely mounted to the hub providing an integral unit. The construction method enables a wide variety of flywheel weights and hub geometries to be simply fabricated with minimal expense and production delay.

Abstract: A fan for a cooling system of a motor vehicle has a closed impeller with a plurality of radial vanes, each of which is provided with an essentially radially oriented vane base. The radial vanes extend in a generally radial direction with respect to an axis of rotation of the impeller. An inner contour of the vanes is defined by leading edges of the vanes, and an outer contour of the vanes being defined by trailing edges of the vanes. The exterior diameter of the outer contour of the radial vanes and the interior diameter of the inner contour of the radial vanes decrease in a direction from the cover disk toward the impeller bottom.

Abstract: A splitter-type impeller comprises a rotary disc member having a central hole to which a hub is fitted with a rotation shaft, a plurality of full blades disposed on one surface of the disc member, each of the full blades having a front edge portion positioned near an outer peripheral portion of the hub, a rear edge portion positioned near an outer peripheral portion of the disc member and a protruded intermediate portion so as to provide a curved shape, and a plurality of splitter blades disposed on the one surface of the disc member, each of the splitter blades having a front edge portion positioned backward of the front edge portion of the full blade in an axial direction of the disc member, a rear edge portion positioned near the outer peripheral portion of the disc member and a protruded intermediate portion so as to provide a curved shape in parallel to the full blade.

Abstract: A fluid impeller for a centrifugal pump includes a hub having a substantially disk-like form with a center and an edge, circular symmetry, and provision for being rotatably driven. A first plurality of pumping vanes projects substantially perpendicularly from a first surface of the hub and extends radially outwardly from a locus near the center of the hub to another locus near the edge of the hub. These vanes provide a high pressure head with a small impeller diameter. A second plurality of separate and twisted inlet vanes also projects substantially perpendicularly from the first surface of the hub and extends radially outwardly to the locus near the center of the hub from another locus nearer the center of the hub. The separate second plurality of vanes, by turning and pre-pressurizing the fluid, provides an impeller having capability of cavitation-free pumping at low net positive suction head (NPSH). A front shroud can be used which partially or totally covers the first and/or second plurality of vanes.

Abstract: Blades for use in combusion turbine engine are formed from a single crystal garnet body--suitably an aluminum garnet, desirably a rare earth aluminum garnet--having an epitaxial surface layer of a second garnet having a lattice constant larger than that of the body garnet so as a compressive strain, to thereby strengthen the blade.

Abstract: A blade wheel for a centrifugal pump has at least two blade discs spaced along an axis of rotation of the discs. At least one row of generally radial blades extends between the blade discs and is spaced successively in a circumferential direction of the blade discs with blade ends radially outermost at peripheries of the blade discs. The blade ends are at an angle to the axis of the rotation of the discs, whereby each blade end has a leading edge and a trailing edge in the circumferential direction. In order to reduce pressure variations caused by the blades in a discharge conduit of the pump, the leading edge of the blade end of a trailing blade in the circumferential direction is one of in axial alignment with the trailing edge of the blade end of a successively leading blade in the circumferential direction and ahead of the trailing edge in the circumferential direction.

Abstract: A rotor (5) particularly for mixing machines of internal type (1) for elastomers and plastomers, equipped with at least one pair of blades (6) each projecting from the cylindrical hub of rotor (5) starting from flank (5c) of the rotor and set helically thereon, in which at least one of such blades (6) has at least one split delimited by two blade sections (6a, 6'a; 6b, 6'b; 8a, 8'a; 8b, 8'b; 10a, 10'a) located parallel to one another, one section (6a, 6b, 8a, 8b, 10a) having one of its ends located at flank (5c) of rotor (5) and at least one section (6a, 6'b, 8'a, 8'b, 10'a) being separated from the previous one or located on the same helix or on parallel helices to create at least one passage opening (7) capable of bringing about diversion of the flow of material during mixing.

Abstract: A centrifugal pump for a first fluid has a housing with an inlet and includes a rotatable impeller which is adjacent to a stationary plate. The inlet communicates with a space defied between the impeller and the plate. An outlet adjacent to the periphery of the impeller also communicates with the space. The space is divided into a plurality of zig-zag pumping passages which extend from the inlet to the periphery of the impeller. Each passage has undulating sidewalls defined by complementary undulations in the facing surfaces of the plate and the impeller. Each passage also has endwalls defined by vanes mounted to the impeller. The vanes generally conform to the undulations in the impeller and are also complementary to the undulations in the plate. An injection port in the plate communicates with the space downstream of the inlet at a point where the lowest absolute pressure within the passages exists. A second fluid may be injected through the port and into the passages.

Abstract: A centrifugal impeller includes a hub formed about an axis of rotation with a plurality of substantially radially extending blades affixed to the hub, each blade having a suction surface, and a pressure surface formed on the adjacent blade facing the suction surface. The blades have a height being measured in a radial direction from the hub. A portion of the hub, having a hub configuration, extends between the pressure surface and the suction surface. An imaginary plane extending in a direction normal to the axis of rotation is used to define a cross-sectional view of the impeller. A first and a second concentric circle are formed in the plane with the center of the concentric circles being the axis of rotation. The first circle passes through a point on the hub located closest to the axis of rotation. The second circle has a radius greater than the first circle by an amount equal to five percent of the blade height, wherein a portion of the hub extends outside of the second circle.

Abstract: The invention relates to a radial-flow wheel for a turbo-engine comprising a hub and blades distributed on the hub-side outer circumference, the meridian section contour of the outer surface of the hub being a catenarian curve. This radial-flow wheel has the advantage of low frictional losses.

Abstract: In a pump impeller structure employing a plurality of vanes arranged on the periphery of an impeller hub in a substantially radial direction of a pump shaft having a driving connection with the impeller, each vane including a particular geometry of a pressure surface therein. The pressure surface is formed concave in such a manner as to increase an angle defined between two tangential lines on a point of the pressure surface, form the innermost end of the vane to the outermost end of the vane, one tangential line being perpendicular to a straight line drawn in the radial direction of the impeller from the center of the pump shaft to the point on the pressure surface and the other tangential line being drawn along the contour of the pressure surface, both of the tangential lines being included in a same rotational plane of the vane.

Abstract: A mixed-flow impeller pump, which may be used, for example, as a primary pump for circulating sodium as the primary coolant in a fast nuclear reactor, comprises an impeller with evenly-spaced blades. Some of the blades, which are symmetrically disposed around the axis of rotation of the impeller, extend beyond the ends of the other blades towards the suction side of the pump to form an inducer. The channels defined between the extensions of the extended blades follow helical paths parallel to the axis of rotation. The leading edges of the unextended blades are interposed between the extended blades in the region of divergence of flow from the axis of rotation. The provision of the inducer reduces the risk of cavitation in the pump, which could cause rapid wear of the impeller.

Abstract: An impeller for a centrifugal compressor includes a hub, several main blades mounted to the hub, and several splitter blades mounted to the hub, each splitter blade being located between adjacent main blades and being disposed from a position centered between the adjacent main blades by an amount of about 6% to about 33% of one half the angular distance between the main blades.

Abstract: A pump impeller especially useful for moving heavy sediment and debris includes a drive plate having a series of blades mounted on one side thereof and radially extending from the center of the drive plate. Each of the blades is provided with a material retainer secured to the leading edge of the blade in the form of a winglet. The winglet forces the sediment and debris outwardly to be driven by the leading edge and across the tip of the blade. Each of the top or inlet edges of the blades is sharpened to cut weeds or debris which may then be pumped with the sediment.

Abstract: A method and apparatus for work expanding a cryogenic liquid wherein the liquid is expanded in a manner to avoid a transient pressure drop below the flash point thus reducing the potential for cavitation and consequent operating inefficiencies.

Abstract: Boundary layer separation in a rearwardly skewed centrifugal impeller can be better controlled by designing the impeller blades with an "S" camber, i.e., with rearward curved radially extending blades in a centrifugal blower. The blades have a positive camber at a radially inward region and a negative camber at a radially outward region of the blade.

Abstract: A centrifugal pump including a casing containing an impeller mounted on a shaft with a circular shroud fixed on a hub, a plurality of relatively long radial vanes fixed on the shroud and spaced around the hub at equally spaced intervals, a series of shorter vanes extending radially and spaced around the hub with at least two shorter vanes located between each pair of longer vanes, the inner end of each shorter vane being located radially outward from the inner ends of the adjacent longer vanes, each pair of adjacent longer vanes forming between them a single passage extending radially outward from the hub and flowing into at least three smaller passages formed between said pair of adjacent longer vanes and the shorter vanes located between said pair of adjacent longer vanes, and a series of oblong shaped pressure balancing holes located in said shroud and opening into said passages.

Abstract: A fan (10) adapted to be driven by an electrical motor (12), the motor of the type having openings (14) to permit the flow of air therethrough to cool internal components of the motor. The fan comprising a cup-shaped hub (20) adapted to be driven by the motor and including a plurality of arcuately shaped webs (44, 70) for inducing the flow through the motor and through a plurality of openings (40) formed in a axially extending wall (28) of the hub (20).

Abstract: A centrifugal pump for handling fluids with a high gas content, wherein the impeller is provided with a through-bore connected with the inlet of each outflow channel, as well as with at least one small bore inside each channel. The blades are not very divergent relatively to each other, and each of the blades is split into two parts by a vertical slot. Also a large number of small-sized channels are used to define the diffuser outflow channels.

Abstract: A surgeless combustion air blower which, due to the incorporation therein of an impeller having a novel configuration and blade shape, does not surge under periods of low turn-down, and yet which demonstrates comparable volume capacity as conventional impellers of the same diameter. The novel configuration and blade shape of the impeller inhere in three design features of the impeller: (1) the wheel bears no shroud; (2) a quadrangular inducer appends the leading edge of each blade adjacent the hub, which inducer is bent between 40.degree. and 50.degree., and preferably 45.degree., into the direction of rotation of the impeller; and (3) the blade tapers from a maximum chord immediately down-blade of the inducer to a minimum chord at its tip. In addition, the slope of the inducer-blade interface, or "bend line" of each inducer, opposes the predominant taper of the blade from which it appends.

Abstract: A multistage centrifugal impeller in which each blade row is individually matched to optimum efficiency characteristics in a manner which minimizes blade lean. Each blade row is composed of twisted blades which substantially equalize working fluid diffusion from blade root to blade tip while restraining blade lean to less than 15.degree..

Abstract: A belt pulley and method of making the same are provided, the pulley having a hub and a peripheral groove for receiving part of an endless belt therein that is to drive the pulley or be driven thereby whereby the pulley is adapted to be rotated about the axis of the hub. The pulley has a plurality of vanes extending outwardly from at least one of the opposed sides thereof, the vanes comprising a plurality of spaced apart curved vanes of substantially the same size and shape and disposed in a plurality of circular arrays that are generally concentrically disposed relative to each other about the axis and on the one side of the pulley for acting on fluid adjacent the pulley to tend to cool the pulley with the fluid. The curved vanes in each circular array are each disposed substantially evenly between an adjacent pair of curved vanes in the circular array adjacent thereto whereby the number of the curved vanes in each circular array is the same, each curved vane having a convex side and a concave side.

Abstract: An offset centrifugal compressor having a plurality of curved blades associated with a rotor and defining, respectively, inducer and exducer sections with a plurality of the blades being formed of at least three blade parts extending generally end-to-end. The adjacent ends of adjacent pairs of blade parts are indexed and immersed relative to each other in both the inducer and exducer section to form a pair of gaps through which a jet of gas may travel from the pressure side to the suction side of the blade to control boundary layer build-up and reduce separation of gas from the blade. An aerodynamically contoured bridge member is located in each gap to provide structural integrity and resonance frequency control, with these bridging members being positioned to avoid obstruction of gas flow in the area adjacent the tip of the blade.

Abstract: A belt pulley and method of making the same are provided, the pulley having a hub and a peripheral groove for receiving part of an endless belt therein that is to drive the pulley or be driven thereby whereby the pulley is adapted to be rotated about the axis of the hub. The pulley has a plurality of vanes extending outwardly from at least one of the opposed sides thereof, the vanes comprising a plurality of spaced apart curved vanes of substantially the same size and shape and disposed in a plurality of circular arrays that are generally concentrically disposed relative to each other about the axis and on the one side of the pulley for acting on fluid adjacent the pulley to tend to cool the pulley with the fluid. The curved vanes in each circular array are each disposed substantially evenly between an adjacent pair of curved vanes in the circular array adjacent thereto whereby the number of the curved vanes in each circular array is the same, each curved vane having a convex side and a concave side.

Abstract: An impeller for a centrifugal impeller comprising a disc portion, a coaxial hub portion having a longitudinal through-bore by which the impeller is mounted on a rotatable shaft, and a plurality of blades in any one of several forms. The tip of each blade is curved in a direction opposite to the rotation of the impeller more than the rest of the blade. The radius of the tip curve decreases uniformly toward the radially outer end of the blade. This tip treatment produces improved isentropic efficiency.

Abstract: Disclosed is a method of producing a profiled product having fins such as an impeller having vanes which cannot be formed directly by casting a preliminary product having fins of the desired shape, a concave filled out portion being provided at one side of the root of each fin along the length of each fin depending upon the required final shape of the fin, while a corresponding cut out portion is formed at the opposite side of the root of each fin at the position corresponding to the above filled out portion, and then applying a force to each fin so as to cause plastic deformation thereof at the position where the concave filled out and cut out portions are provided thereby permitting the location of the root of each fin to be displaced toward the side provided with the filled out portion by the amount corresponding to the variation in the amount of the filled out and cut out portions to form the required final shape of each fin.

Abstract: A multistage centrifugal impeller in which each blade row is individually matched to optimum efficiency characteristics in a manner which minimizes blade lean. Each blade row is composed of twisted blades which substantially equalize working fluid diffusion from blade root to blade tip while restraining blade lean to less than 15.degree..

Abstract: The liquid jet propulsion unit is driven by the conventional outboard motor. The drive of the motor directly rotates an impeller which draws up the water into an impeller chamber where it is moved by isentropic radially extending impeller blades. These blades have three progressive stages from inlet to outlet, i.e., axial, transition, and radial. In the delivery of the intake liquid to the outlet chamber the twisting turbulence is reduced and is straightened out and is further straightened by the outlet vane to give a stream greater lineal length and force through the outlet nozzle, which drives the craft forward. Since the vertical distance between intake and outlet is only a matter of a few inches, shallow draft boats can be driven successfullyin shallow and rocky water.

Abstract: A cross flow fan (10) imparts both radial and axial flow components to airflow passing through the fan, resulting in a conical exit airflow. The fan includes a hub (12) and circumferentially spaced, radially extending fan blades (14, 16, 18, 20, 22, and 24). Backing plate portion (34, 36, 38, 40, 42, and 44) is associated with each of the blades 14-24. The backing plate portions lie on a conical plane which rakes backwardly from the hub in a direction downstream from the fan. The fan blades are disposed in a plane oblique to their corresponding backing plate portions, so that they intersect the latter along a joining edge (50). Each of the fan blades includes portions having greater (56) and lesser (58) radii of curvature. The portions (58) of lesser radii of curvature cooperate with the corresponding backing plate portions (36) to provide a radial component to the flow through the fan whereas the leading edge portions (56) provide the axial flow component.

Abstract: A bidirectional pump is provided which includes a pair of impellers each operable for pumping liquid in one direction of operation. One of the impellers has modified vane structure for reducing turbulent liquid flow conditions when rotated in a reverse direction in a volute pump cavity. The modified vane structure reduces noise emission characteristics of the impeller when operated in a pump cavity substantially depleted of liquid.

Abstract: There is disclosed apparatus for preventing rotating stall in a centrifugal rotor. An aerodynamically designed blade extension is directed from the inner edge of the blade into the eye of the rotor.

Abstract: A centripetal turbine rotor has ceramic blades with integral blade roots of arcuate axial section which are clamped axially between two supporting elements mounted on a common shaft so that the ceramic blade roots are maintained in compressive stress along their arcuate, radially inwardly convex, profiles, opposing centrifugal strain in the blade roots.Cooling air may be supplied along axial channels in one hub to an internal chamber within the blade roots and may thence flow outwardly into the gases flowing through the turbine.

Abstract: An arrangement for washing lenses of headlights comprises a source of washing liquid, conveying conduit communicating with the source and arranged for flowing the washing liquid therethrough, a nozzle communicating with the conveying conduit and arranged for admitting the washing liquid from the latter and issuing the same toward the lens to be washed, and a rotary pump communicating with the conveying conduit and operative for inducing the washing liquid to flow from the source of the nozzle through the conveying conduit. The pump has a chamber into which a supply pipe of the conveying conduit is opened, and a rotor which has a projecting portion extending into the supply pipe. The rotor has a plurality of blades which are circumferentially spaced from one another so that a plurality of gaps are formed each between two adjacent blades, and a plurality of ribs which are arranged on the projecting portion of the rotor.

Abstract: The rear radially extending component of a radial flow turbine or compressor rotor is centered on a cylindrical surface spaced from the common shaft, on which the rotor is wedged by a tapered sleeve, by an extension of one component fitting into a recess in the other, but this cylindrical surface is not required to transfer any torque, because that is transferred from the forwardly extending component to the radially extending component by ridges of one fitting into radial grooves of the other near the base of the vanes. Greater thermal expansion of the radially extending component is accommodated by the claw ridge slipping radially in its groove.

Abstract: A radial turbine wheel for a gas turbine which consists of two parts and more particularly of a first part adjoining the turbine inlet which includes the outer sections of the blades and of a second part leading to the turbine outlet which includes the inner essentially curved section of the blades whereby the two parts are made of materials having different properties.

Abstract: Each blade on an impeller disc comprises an impeller portion extending substantially radially of the disc and a centrally located inducer portion on the front side of the impeller portion, the inducer portion being angled from the impeller portion in the direction of impeller rotation. The impeller portion itself is mostly inclined in the direction of impeller rotation, with the angle between the impeller portion and the front face of the disc being about 90 degrees at its inner end and gradually decreasing toward its outer end, where the angle is in the range of from about 50 to 70 degrees. Preferably, these blades are arranged alternately with auxiliary blades which are essentially identical with the impeller portions of the first recited blades.

Abstract: A radial turbine wheel for a gas turbine which consists of two parts and more particularly of a first part adjoining the turbine inlet which includes the outer sections of the blades and of a second part leading to the turbine outlet which includes the inner essentially curved section of the blades whereby the two parts are made of materials having different properties.

Abstract: A centrifugal pump having a casing with a medially disposed partition for defining therein a flow chamber on one side of the partition and a pumping chamber on the other side thereof, said flow chamber having a side inlet for fluid to be pumped and said pumping chamber having an outlet for pumped fluid. The partition has a generally disposed central opening therethrough to provide communication between the flow chamber and the pumping chamber and said flow chamber forms a fluid flow path from the side inlet to the opening in said partition of generally curvilinear shape which is spaced from and about the axial line of the pump. A driven shaft is rotatably mounted in the axial line of the pump.

Abstract: To improve the reliability of a fan blade to provide forced cooling to automotive-type alternators, while retaining the advantages of compact construction and inexpensive manufacture, a disk-shaped element is formed with a central opening to receive the shaft of the alternator having fan blades at the periphery thereof, and which further is so shaped and formed that the central region is axially (with respect to the shaft) offset from the major plane of the disk-shaped fan blade, clamping washers being placed against the offset region, one washer spanning the concave portion of the offset portion and the other washer fitting within the concave portion of the offset.

Abstract: Multi-Stage ring type centrifugal pumps for pumping fluids are adapted to receive an inducer shaped and sized generally but not necessarily to replace the impeller and diffuser of the first pumping stage of the given centrifugal pump. The preferred type of inducer for this use has an enlarged inlet diameter, at least two inducer vanes; an outlet diameter less than the inlet diameter to provide generally convergent flow passages, and the selected inlet vane angle for the inducer vanes will provide a positive incidence angle to increase the pressure at the suction inlet of the associated stage impeller into which the fluid being pumped is delivered.The inductor is shown in various forms. One embodiment includes an integral hub, inducer vanes and outer shroud. A second male type embodiment includes an integral hub and inducer vanes, and an operatively associated fixed outer shroud matched to the outer periphery of the inducer vanes.

Abstract: A surface aerator equipped with a central vertical shaft which can be coupled to a drive means, substantially vertical blades being mounted on the lower end of said shaft.According to the invention an upwardly expanding, smooth cone is fitted underneath, and coaxially with, the shaft, the greatest radius of which cone is appreciably greater than the radius of the shaft, but appreciably smaller than the radius of the aerator at the outer edges of the blades, while the upper edge of this cone is adjoined by an overhead vertical cylinder, the successive blades being linked by an outwardly and upwardly inclined, at least substantially flat connecting plate, which is upwardly staggered with respect to the cone.

Abstract: An improved resilient member is provided in a clamping connection between two members of a gas turbine rotor, said resilient member taking the form of a rim or outer ring provided with an annular row of inwardly protruding fingers. The resiliency is due partly to deflection of the fingers and partly to a twisting of the outer ring with the fingers.

Abstract: A runner for an hydrodynamic machine comprises fixed runner vanes mounted in a predominantly radially oriented part of an annular channel defined between a crown and a skirt ring, and a crown tip attached to the crown and defining with the skirt ring a predominantly axial portion of the channel. Fins attached to the crown tip deflect the flow leaving the runner vanes to eliminate essentially all vortex flow when the turbine operates above an optimum condition. The fins are substantially triangular in shape and are located with the apex portion nearest the runner vanes and the base portion remotest from the vanes. They are curved along their length, the apex being substantially aligned with the flow from the vanes and the base being aligned to deflect the flow in a direction generally with the axis of rotation of the runner.

Abstract: A blade for a centrifugal pump impeller comprises a pressure end or blade tip lying in a first radius about the rotational axis joined to a suction end opposite the pressure end and lying in a second radius by a pumping surface having a concave portion adjacent the pressure end running into a convex portion adjacent the pressure end, the two radii being angularly spaced with the second radius leading in the direction of intended rotation.

Abstract: A centrifugal compressor assembly for a gas turbine engine includes an inducer section and an impeller section mounted for rotation about an axis. Because leading edges of the impeller blades are cambered, damper pads, extending perpendicular to the low pressure sides thereof also extend axially forward. Blades of the inducer section are indexed rotationally rearward of the impeller blades to improve the distribution of compression gases through the impeller section and high pressure surfaces of the inducer blades mate near their leading edges with outward surfaces of the damper pads. Because the pads and inducer blades vibrate at different frequencies, inducer blade vibrations that might otherwise cause fatigue are attenuated by contact with the damper pads. The damper pad arrangement thus permits the damping of vibrations in the inducer blades notwithstanding the indexed relationship between the inducer section and the impeller section.