EP2394052A1 - Rotor axial annulaire pour turbine - Google Patents

Rotor axial annulaire pour turbine

Info

Publication number
EP2394052A1
EP2394052A1 EP09824326A EP09824326A EP2394052A1 EP 2394052 A1 EP2394052 A1 EP 2394052A1 EP 09824326 A EP09824326 A EP 09824326A EP 09824326 A EP09824326 A EP 09824326A EP 2394052 A1 EP2394052 A1 EP 2394052A1
Authority
EP
European Patent Office
Prior art keywords
rotor
turbine
annular
hub
blades
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09824326A
Other languages
German (de)
English (en)
Other versions
EP2394052A4 (fr
Inventor
Frédérick CHURCHILL
Ion Paraschivoiu
Octavian Trifu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Organoworld Inc
Original Assignee
Organoworld Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Organoworld Inc filed Critical Organoworld Inc
Publication of EP2394052A1 publication Critical patent/EP2394052A1/fr
Publication of EP2394052A4 publication Critical patent/EP2394052A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B17/00—Other machines or engines
    • F03B17/06—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head"
    • F03B17/061—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially in flow direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/10—Stators
    • F05B2240/13—Stators to collect or cause flow towards or away from turbines
    • F05B2240/133—Stators to collect or cause flow towards or away from turbines with a convergent-divergent guiding structure, e.g. a Venturi conduit
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • the present invention generally relates to both wind and water turbine applications. More specifically, the present invention relates to an annular axial rotor for a turbine.
  • AAT American Wind Turbine
  • TSR tip-speed ratio
  • the blades are supported by a series of two or more hoops that pass behind the blades and do not allow for pitch adjustments while in operation.
  • the hoops are attached to arms that transmit the torque generated by the blades to the rotor shaft.
  • the AWT rotor develops much more torque than a Horizontal Axis Wind Turbine (HAWT) but is limited in diameter by its weight. It offers a lower efficiency, as it is essentially a drag-type rotor where the rotor blades generate little lift. On the contrary, the HAWT rotor turns much faster (normally between 6 and 9 times faster) and generates its torque from the lift generated by the blades passing through the air stream at high speeds.
  • HAWT Horizontal Axis Wind Turbine
  • HAWT rotors are normally installed in relatively isolated sites given the fact that when the blades pass in front of the turbine tower the pressure wave created between the blade and the tower transforms into a large woof.
  • the noise of the woof is an important disadvantage of an axial flow rotor. Decreasing the TSR of the rotor would greatly decrease the noise level. In the case of a standard three- blade turbine this requires adding additional full-length propeller blades and its corresponding weight to the rotor without any gain in turbine efficiency or electrical production. This is a difficult problem to solve and most residents living close to a wind power site are forced to accept the noise and a loss in their quality of environment.
  • a technological solution that addresses the difficulties of wind speed variation mentioned above would greatly improve turbine efficiency, improve the electrical stability of the production and decrease the production costs for electricity.
  • An object of the present invention is to provide an annular axial rotor that satisfies at least one of the above-mentioned needs.
  • annular axial rotor for a turbine comprising:
  • hub structure having a hub diameter and attached to a rotating shaft of the turbine; -a plurality of turbine blades extending radially from the hub structure;
  • At least one annular shroud surrounding the plurality of turbine blades, the at least one annular shroud having a first annular shroud diameter, wherein the turbine blades are held between the hub structure and the at least one annular shroud.
  • the hub diameter is at least 0.3 times the first annular shroud diameter.
  • the application of the concept of an annular rotor aims at creating a swept area by the blades that is centered on the high torque zone and the low torque zone is used simply to transmit the torque from the high torque zone to the rotating shaft.
  • the central zone of the rotor is named the low torque zone as in this area the blades have reduced tangential speed, thus poor aerodynamic efficiency.
  • the velocity pressure over the high torque and low torque zones are equal, the power generated over the zones is not equal.
  • An annular rotor makes it possible to increase the solidity of the rotor without adding the heavy weight of full-length blades designed to both generate lift and transmit torque.
  • the frontal area of each individual rotor blade is now smaller in area and the TSR has also decreased. Consequently, the woof created as the blades pass in front of the mast will decrease.
  • the rotational speed of the rotor is lower, the visual impact of its rotation will also decrease.
  • the efficiency of the rotor may decrease slightly as the TSR decreases.
  • annular rotor that supports the blades at both ends will be higher than for a standard three-blade rotor. Where noise and visual impact are not a problem, such as in offshore installations, the design of very large diameter rotors will still remain a design challenge.
  • the annular design makes it easier and simpler to build very large diameter rotors, the principal advantage being the simplicity of fabrication of the blades and the optimum use of the weight of the materials over the swept area.
  • the present invention provides a wind turbine rotor configuration that greatly facilitates the use of a plurality of airfoils to adjust the solidity and the TSR of the rotor. This can be achieved while maintaining a high coefficient for the conversion of wind energy into useful torque.
  • This new annular shaped rotor is designed to employ three or more airfoils that are lighter and shorter than the propeller blades of a HAWT of equal diameter.
  • Computer simulation has shown that the use of the same blade profile and swept area in both an annular and a HAWT rotor will result in a modest loss of efficiency for the annular rotor.
  • the new annular rotor design will operate at an optimum TSR range of 1.5 to 6.
  • the rotor swept area is located as far as possible from the rotating axis. This increases the torque produced per unit of air volume per unit of swept area at all wind speeds.
  • the annular rotor comprises an inner hub with sprockets that are attached to the inner ring of an annular shaped rotor blade section.
  • the annular shaped turbine section consists of an inner and outer ring and a series of uniform untwisted airfoils that are held between the inner and outer rings. Installing between 3 and 50 blades between the rings makes it very easy to adjust the solidity of the rotor to a desired TSR.
  • Figure 1 is a schematic view of the zones (sectors) of low and high torque on the swept area of an axial flow turbine.
  • Figure 2 is a graph of chord and twist angle distribution along the blade used for a simulation of operation of a standard twisted HAWT rotor.
  • Figure 3 is a side view of an annular axial turbine rotor according to a preferred embodiment of the present invention.
  • Figure 4 is a side view of an annular axial turbine rotor according to another preferred embodiment of the present invention.
  • Figures 5A and 5B are perspective and partial side views respectively of an annular axial turbine rotor according to another preferred embodiment of the present invention.
  • Figure 6 is a perspective view of an annular axial turbine rotor according to another preferred embodiment of the present invention.
  • Figure 7 is a perspective view of an annular axial turbine rotor according to another preferred embodiment of the present invention.
  • Figure 8 is a side view of an annular axial turbine rotor according to another preferred embodiment of the present invention.
  • Figures 9A and 9B are a front view and a detailed view taken along section C-C respectively of an annular axial turbine rotor according to another preferred embodiment of the present invention.
  • Figures 10A and 10B are a front view and a detailed view taken along section D- D respectively of an annular axial turbine rotor according to another preferred embodiment of the present invention.
  • Figure 11 is a graph of Power vs. Wind Speed during simulated operation of a conventional HAWT rotor and a rotor according to another preferred embodiment of the present invention.
  • Figure 12 is a graph of Power vs. Sectoring Ratio at three nominal wind speeds for a sectored conventional HAWT rotor and a rotor according to a preferred embodiment of the present invention.
  • Figures 13A and 13B are graphic representations of the performance and operating ranges of existing wind turbine rotor designs. DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
  • an annular axial rotor 1000 for a turbine As shown in Figures 3 to 8, according to the present invention, there is provided an annular axial rotor 1000 for a turbine.
  • the rotor 1000 includes a hub structure 1002 having a hub diameter and attached to a rotating shaft 1004 of the turbine.
  • the rotor also has a plurality of turbine blades 1006 extending radially from the hub structure 1002, and at least one annular shroud 1008 surrounding the plurality of turbine blades 1006.
  • the annular shroud 1008 has a first annular shroud diameter.
  • the turbine blades 1006 are held between the hub structure 1002 and the annular shroud 1008.
  • the hub diameter is at least 0.3 times the shroud diameter.
  • the turbine blades 1006 are of uniform chord length and are untwisted.
  • the plurality of turbine blades 1006 comprises between 3 and 50 turbine blades.
  • the hub structure 1002 comprises a hub ring 1010 and a plurality of sprockets 1012 connecting the hub ring 1010 to the rotating shaft 1004 of the turbine.
  • the rotor 1000 further comprises a turbine blade pitch angle adjustment system for selectively adjusting a pitch angle of the plurality of turbine blades.
  • the rotor 1000 further comprises a fluid velocity measurement system located upstream of the rotor and producing a signal indicative of fluid velocity entering the turbine. The turbine blade pitch angle adjustment system adjusts the pitch angle of the plurality of turbine blades based on the signal indicative of fluid velocity entering the turbine.
  • a tip-speed ratio of the turbine is between 1.5 and 6.
  • the rotor 1000 further comprises a convergent nozzle 13 for directing fluid entering the rotor and a divergent nozzle 14 for directing fluid exiting the rotor.
  • the rotor 1000 further comprises a directing system 16 mounted over the hub structure for directing fluid entering the turbine towards the plurality of turbine blades.
  • the rotor further comprises at least one additional annular shroud 1020 concentrically surrounding the first annular shroud 1008 and at least one additional plurality of turbine blades 1022 held between the first annular shroud 1008 and the at least one additional annular shroud 1020.
  • the rotor further comprises at least one additional turbine blade pitch angle adjustment system for independently selectively adjusting a pitch angle of the at least one additional plurality of turbine blades.
  • the rotor 1000 further comprises a compressor fan 18 positioned upstream of the hub structure and increasing velocity of the fluid entering the turbine.
  • the turbine blades are hollow, perforated and connected to a vacuum system for controlling boundary layers in proximity of the turbine blades.
  • the turbine blades are hollow, perforated and connected to a pressurized fluid supply system for controlling boundary layers in proximity of the turbine blades.
  • the hub structure is integrated to a generator and is composed of two circular inner and outer hub sections.
  • the outer circumference of the inner hub section supports the poles 26 of the turbine generator.
  • the outer hub section includes a plurality of radial support arms 24 attached to one or both sides of the inner hub section that supports the turbine blades and an inner hub shroud, the diameter of the inner hub shroud corresponding to the hub diameter.
  • the generator stator winding 30 is supported using tension from a centrally mounted stator base and the integrated turbine-generator rotor is single bladed.
  • the integrated turbine-generator rotor is double-bladed and the stator winding is supported by compression from an exterior-mounted stator base.
  • the stator winding support using an exterior-mounted stator base may be used for single or double bladed integrated turbine-generator rotors.
  • annular shaped rotor that easily permits changes in rotor solidity and TSR for use with at least one wind turbine to decrease the noise levels of the turbine.
  • the annular shaped rotor includes: -inner and outer rings that support the turbine blades at both ends by a shaft that passes through the thicker cross section of the turbine blades; -a rotor radius as defined by the radius of the outer ring; - turbine blades being of a regular and untwisted form that is simple and inexpensive to produce; -a rotor hub and sprockets that connect the rings and blades to the turbine rotating shaft; -an entrance and exit adapter designed to minimize the velocity pressure losses of the air stream reaching the turbine blades; -a high torque area as defined by the blade swept area created by the turbine blades; -a low torque area defined as the area between the rotor shaft and the inner ring;
  • the ratio of blade length to rotor radius is comprised between 0.70 and 0.10.
  • the TSR is comprised between 1.5 and 6.
  • the number of blades is comprised of between 3 and 50 and most preferably between 3 and 25.
  • the rotor provides a rapid and continual adjustment of the airfoil pitch angle through rotary actuation provided to all turbine airfoil blades.
  • the rotor can adjust airfoil pitch angle to the instantaneous upstream wind velocity.
  • the rotor to increase performance, can include several concentric independently controlled swept areas in the high torque zone of the same rotor.
  • the rotor to increase performance, can include two or more stages of blades mounted on the same rotor.
  • the rotor uses a deflector over the swept area of the spokes to increase the total wind pressure at the blades and the power output.
  • the rotor can apply either vacuum or compressed air for boundary layer control on the surface of the blades to increase performance.
  • the rotor can be used for air turbine and water turbine applications.
  • annular rotor for use with a wind turbine and to increase the rotor solidity and establish the TSR in the range of 1.5 to 6, the annular rotor compromising a rotor shaft and hub, a series of aerodynamically shaped spokes that connect the hub to the inner ring, an inner and outer ring that holds the blades in place, the difference in the radius of the rings equal to the length of the blades establishing a length ratio (B/R) between the length of the blades on the radius of the rotor, a set of straight, untwisted, airfoil sections held in place at their extremities by the rings, the number of airfoils establishing a TSR for the rotor in the range of 1.5 to 6, a set of actuators located at one or both ends of the blades that adjust the pitch angle of the blades, an air speed measuring device located on an upstream extension of the rotor shaft, a programmable controller capable of controlling rotor speed
  • the shape, width and length of the blade will vary with each application, as such the number of blades required to obtain a set TSR will also vary. It has been determined that the number of blades per swept area will vary between 3 and 50 and most preferably between 3 and 30.
  • the material of the annular rotor should be resistant enough to retain its structural integrity in all operating conditions.
  • the material or combination of materials may be, for example, be made of aluminum and compromises structural reinforcement made of steel.
  • the blades can be constructed in aluminum, steel, plastic or composite materials such as fiberglass etc.
  • the swept area of the rotor may be divided into a series of concentric swept areas by adding an additional inner ring(s) and additional blades.
  • Each swept area has its own operating TSR.
  • the concentric swept areas may have different sizes and blade lengths.
  • the programmable controller controls independently the pitch angle of the blades in each swept area.
  • the inner and outer rings will take the shape of shrouds.
  • inlet and outlet adapters are attached to the extremities of the shrouds. These adapters are designed using best practices for minimizing velocity pressure losses and as such may take on a variety of shapes including conical, bell shaped, etc. Depending on the system configuration they may or may not increase the velocity pressure at the blades. If there is an increase in velocity pressure for air, it will be of the order of 0 to 25.4 mm of water.
  • two stages of blades are mounted, one in front of the other, on a common shroud. They may or may not be of equal area and their pitch angles are controlled independently.
  • the inner and outer rings may take on other structural shapes than circular such as multisided (example octagon or hexagon, oval, etc).
  • a wind deflector covers the area swept by the spokes. The wind deflector directs the entire air stream striking the area occupied by the spokes to the annular shaped blade section.
  • This deflector may take several aerodynamic shapes.
  • Figure 3 illustrates a conically shaped deflector 1050 while Figure 4 is a semi-circular shaped deflector 16. While other shapes whether bell- shaped or parabolic may be used, the main criterion is to direct the entire air stream with the least pressure loss.
  • anemometer(s) 19 are placed upstream of the rotor mounted on the ends of a vertical rod 20.
  • the rod 20 serves to position the devices outside of the influence of the compressor fans and the deflector that covers the face of the rotors.
  • a bearing assembly 22 that allows the rod to remain stationary connects the rod to the rotor shaft.
  • a counterweight 21 is installed on one of the ends of the vertical rod.
  • boundary level control action serves to reduce the component of drag on the rotating airfoils.
  • the inner shroud, the shaft of the blade and the blade itself all have a hollow center and are interconnected. Piping run from the inner shroud along the spokes, along the outside circumference of the rotor shaft and along a rotary joint situated on the shaft deliver either compressed air or vacuum into this continuous system.
  • the hollow airfoils are equipped with distribution plates along its length that serve to provide a boundary layer control action. This action has the purpose of energizing the blades boundary layer.
  • the annular rotor of the present invention may be used in a plurality of environments including very high wind speeds incurred in augmented wind turbines where the blades of a standard HAWT rotor would become trans-sonic. It may also be applied to applications that use a wind turbine apparatus to augment the velocity pressure to the blades and/or with a rotor-sectoring apparatus.
  • the proposed annular rotor may be used to replace existing standard three-blade HAWT rotors with the intent of decreasing the noise level created by the rotating blades. Given its lower noise and visual impact it is suited to be installed in urban areas. The increase in solidity and lower rotational speeds decrease the risks for injury or death to birds and bats.
  • WT Perf uses blade-element momentum (BEM) theory to predict the performance of HAWT2. It was developed at the National Renewable Energy Laboratory (NREL) from the code PROP, originally set up by Oregon State University decades ago. The staff at the National Wind Technology Center from the NREL has recently modernized PROP by adding new functionalities developed it into the current WT Perf.
  • BEM blade-element momentum
  • Figure 6 shows the principal sections of the annular rotor including the outer ring or shroud 1008, the uniform section, airfoil turbine blades 1006, the inner ring or shroud 1010, the aerodynamically shaped spokes 1012, the rotor hub 1002 and the rotor shaft 1004. Also shown are two non-dimensional references, the radius of the inner ring (R1 ) and the radius of the outer ring (R2)
  • Figure 4 shows an annular rotor equipped with an entrance adapter 8A and an exit adapter 8B. These adapters 8A, 8B are designed to minimize the loss of velocity pressure as the wind stream approaches and exits the blades. If an augmented turbine apparatus is used, the convergent nozzle 13 attaches to the entrance adapter 8A and the diffuser 14 attaches to the exit adapter 8B.
  • the adapters may also be used to adjust from straight-walled convergent- divergent sections to a curved turbine rotor section.
  • the dimensions R1 and R2 become equal to the dimensions of the retracted and fully deployed segments of the sectoring cone.
  • the turbine shaft 1004 is lengthened to support the sectoring apparatus for non-augmented turbines.
  • the sectoring device is supported from the floor structure supporting the turbine shaft.
  • the airfoils themselves turn around a central shaft that can be located in the section of the airfoil where the airfoil thickness is largest.
  • Rotary actuators (not shown) are mounted on the outside faces of the rims to be located outside the air stream. The actuators rotate the blades around their axis to adjust the pitch angle.
  • the power for rotary actuation may be mechanical, electrical, pneumatic or hydraulic.
  • the power source for the rotary actuation of the blades may be centralized (pump) or decentralized (electric coils).
  • spokes The cross sectional area of spokes is minimized and their shape is aerodynamic to reduce parasitic drag. They are designed to transmit the torque from the blades in the blade swept area to the rotor shaft.
  • the spokes may attach directly to the inner ring or the spokes may attach to an intermediate ring that fits inside the inner ring. Both rings may be of the same metals or of different metals such as steel and aluminum.
  • a solid disk replaces the above-mentioned spokes.
  • the number of uniform airfoil sections will vary to produce a TSR of between 1.5 and 6. This is achieved by installing between 3 and 50 airfoils on the rotor. Figures 4 to 6 show only one swept area. It is possible to add additional rings and airfoil sections to create several layers of sectored area of different diameters, as shown in Figure 7. This will shorten the length of the blades and create operating zones in which the pitch angle of the blades is adjusted independently from one layer of swept area to another.
  • the width of the rings is established based on the structural solidity required. Their width will normally exceed the length of the airfoils and is more a function of the overall system design. If there is an increase in the velocity pressure of the air stream upwind of the airfoils, the rings also serve the important function of preventing the loss of wind pressure over the tips of the airfoils and the leakage of velocity pressure into the low torque zone.
  • the simulation was performed using as the reference a standard 22-meter diameter HAWT blade.
  • the simulations were carried out on shrouded rotors at wind speeds of 4, 7 and 12 m/s.
  • the sectoring ratio was varied between 1.0 and 0.25.
  • the sectoring ratio may be defined as the ratio of the free area of the blades over the total area of the rotor.
  • the same S-809 profile was used for both the HAWT propeller blades and the annular rotor airfoils.
  • Example 1 shows that an annular airfoil rotor of slightly larger radius can easily exceed the performance of a three-blade propeller HAWT at a lower TSR and consequently at a lower noise level.
  • the example 2 illustrates that a sectored annular rotor of equivalent swept area will largely outperform a three-bladed propeller HAWT. Over a sectoring ratio of 1.0 to 0.25 the improvement in performance is 4 fold.
  • Figures 13A and 13B are graphic illustrations of the performance of almost all common windmill types. As demonstrated, the optimum operating zone for the annular rotor that is situated over the range of TSR range of 1.5 to 6 and a rotor power coefficient slightly less than a three-bladed propeller has no existing equivalent.
  • the parameters of the annular rotor may differ from the examples shown in this document.
  • the mechanism for adjusting the opening of the blades or flow channel may differ based on the fluids, operating conditions and turbine apparatus.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Wind Motors (AREA)

Abstract

L'invention porte sur un rotor axial annulaire pour une turbine. Le rotor comprend une structure de moyeu qui présente un diamètre de moyeu et qui est fixée à un arbre tournant de la turbine. Le rotor possède également une pluralité d'aubes de turbine s'étendant radialement à partir de la structure de moyeu, et au moins un carénage annulaire entourant la pluralité d'aubes de turbine. Le carénage annulaire possède un premier diamètre de carénage annulaire. Les aubes de turbine sont maintenues entre la structure de moyeu et le carénage annulaire, et le diamètre de moyeu est au moins 0,3 fois le diamètre du carénage. Cette configuration facilite grandement l'utilisation d'une pluralité de profils aérodynamiques pour régler la solidité et le rapport de vitesse périphérique du rotor. Ceci peut être obtenu tout en maintenant un coefficient élevé pour la conversion d'énergie de fluide en couple utile.
EP09824326.4A 2008-11-10 2009-11-09 Rotor axial annulaire pour turbine Withdrawn EP2394052A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA2643587A CA2643587A1 (fr) 2008-11-10 2008-11-10 Rotor axial annulaire de turbine
PCT/CA2009/001640 WO2010051647A1 (fr) 2008-11-10 2009-11-09 Rotor axial annulaire pour turbine

Publications (2)

Publication Number Publication Date
EP2394052A1 true EP2394052A1 (fr) 2011-12-14
EP2394052A4 EP2394052A4 (fr) 2014-01-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP09824326.4A Withdrawn EP2394052A4 (fr) 2008-11-10 2009-11-09 Rotor axial annulaire pour turbine

Country Status (3)

Country Link
EP (1) EP2394052A4 (fr)
CA (1) CA2643587A1 (fr)
WO (1) WO2010051647A1 (fr)

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ITLC20120002A1 (it) * 2012-05-07 2013-11-08 Umberto Vergani Aeromotore microeolico a dimensioni legali e rendimento incrementato
EP3271570B1 (fr) * 2015-03-17 2024-08-28 Altum Green Energy Limited Rotor pour un générateur d'électricité
CN108457795B (zh) * 2018-04-26 2023-09-19 新乡市恒德机电有限公司 自动变桨和失能保护的风力发电机风轮
CN112796919B (zh) * 2020-12-30 2022-05-24 浙江大学 一种高效率双转子电机结构的潮流能发电装置
CN112727675B (zh) * 2021-01-11 2022-03-29 江苏科技大学 一种海上风浪一体化发电装置

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EP2394052A4 (fr) 2014-01-15
WO2010051647A1 (fr) 2010-05-14
CA2643587A1 (fr) 2010-05-10

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