WO2013155151A2 - Profil d'aile à anneau doté d'éléments de mélange - Google Patents

Profil d'aile à anneau doté d'éléments de mélange Download PDF

Info

Publication number
WO2013155151A2
WO2013155151A2 PCT/US2013/035922 US2013035922W WO2013155151A2 WO 2013155151 A2 WO2013155151 A2 WO 2013155151A2 US 2013035922 W US2013035922 W US 2013035922W WO 2013155151 A2 WO2013155151 A2 WO 2013155151A2
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
mixing elements
ringed airfoil
central axis
fluid
Prior art date
Application number
PCT/US2013/035922
Other languages
English (en)
Other versions
WO2013155151A3 (fr
Inventor
Walter M. Presz
Robert H. Dold
Ercan Dumlupinar
Original Assignee
Flodesign Wind Turbine Corp.
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 Flodesign Wind Turbine Corp. filed Critical Flodesign Wind Turbine Corp.
Publication of WO2013155151A2 publication Critical patent/WO2013155151A2/fr
Publication of WO2013155151A3 publication Critical patent/WO2013155151A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • 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
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/04—Wind motors with rotation axis substantially parallel to the air flow entering the rotor  having stationary wind-guiding means, e.g. with shrouds or channels
    • 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
    • F05B2240/12—Fluid guiding means, e.g. vanes
    • F05B2240/122—Vortex generators, turbulators, or the like, for mixing
    • 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
    • F05B2240/12—Fluid guiding means, e.g. vanes
    • F05B2240/123—Nozzles
    • 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
    • F05B2240/12—Fluid guiding means, e.g. vanes
    • F05B2240/123—Nozzles
    • F05B2240/1231—Plug nozzles
    • 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
    • F05B2240/12—Fluid guiding means, e.g. vanes
    • F05B2240/124—Cascades, i.e. assemblies of similar profiles acting in parallel
    • 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
    • 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
    • F05B2250/00—Geometry
    • F05B2250/10—Geometry two-dimensional
    • F05B2250/18—Geometry two-dimensional patterned
    • F05B2250/182—Geometry two-dimensional patterned crenellated, notched
    • 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

  • HAWTs horizontal axis wind turbines
  • Conventional horizontal axis wind turbines (HAWTs) used for power generation have one to five open blades having a rotor, attached at a hub and arranged like a propeller, the blades being mounted to a horizontal shaft attached to a gear box which drives a power generator.
  • the gearbox and generator equipment are housed in a nacelle.
  • Diffusor augmented wind turbines are well known to increase the amount of energy that a given wind turbine rotor can extract from a fluid stream.
  • Diffusor augmented wind turbines are well known to increase the amount of energy that a given wind turbine rotor can extract from a fluid stream.
  • the upstream area of the fluid stream is larger than the area at the rotor plane due to the flow contraction at the duct.
  • the fluid stream is contracted at the rotor plane by the duct and expands after leaving the duct.
  • the energy that may be harvested from the fluid is proportional to the upstream area where the fluid stream starts in a non-contracted state.
  • the diffuser surrounds the rotor such that the diffuser guides incoming fluid prior to the fluid interaction with the rotor, providing the greatest unit- mass flow rate substantially proximal to the rotor plane.
  • Annular airfoils used in ducted fluid turbines have an inlet or leading edge and an exit or trailing edge with the lift or suction side of the airfoils on the side proximal to the rotor.
  • the fluid stream is divided into a low pressure, high velocity stream on the interior side of the airfoil, and a high pressure, lower velocity stream on the exterior of the airfoil.
  • the high pressure, lower velocity stream is the bypass flow.
  • Duct augmented wind turbines often employ bypass ducts or multi-element annular airfoils for preventing flow separation from the interior of the duct. Introducing a relatively small volume of bypass flow to the turbine wake is sufficient to maintain flow attachment over the interior surface of the duct. A mixer ejector turbine introduces a relatively greater volume of bypass flow into the wake of the turbine for extracting more energy at the rotor.
  • Ejectors are fluid jet pumps that draw flow into a system and thereby increase the flow rate through that system.
  • Mixer-ejectors may be generally approximated as short compact versions of such jet pumps that are relatively insensitive to incoming flow conditions, and have been used, for instance, on aircraft for providing propulsion in high speed jet propulsion applications involving flow velocities near or above the speed of sound. See, for example, U.S. Pat. No. 5,761,900 by Dr. Walter M. Presz, Jr., which uses a mixer downstream to increase thrust while reducing noise from the discharge. Dr. Presz is a co- inventor in the present application.
  • a fluid turbine system includes a substantially ringed airfoil with mixing elements surrounding a rotor.
  • the fluid turbine system may further include ejector elements forming a mixer-ejector pump that provides an increased unit mass flow rate at the rotor plane, when compared to ambient or bypass flow, and rapidly mixes the low energy turbine exit flow with high energy bypass flow near the exit of the system.
  • a ringed airfoil includes one or more mixing elements along the trailing edge of the ringed airfoil, forming a mixer augmented turbine (MAT).
  • a MAT mixes fluid passing through the rotor with fluid that bypasses the shrouded rotor.
  • the portion of the ambient fluid stream that flows outside of the ringed airfoil is referred to as bypass flow.
  • the bypass flow has greater energy content than that of the fluid stream that has passed through the rotor and had energy extracted from it.
  • Introducing bypass flow into the region downstream of the rotor plane is referred to as "energizing the wake," which provides reduced pressure behind the rotor plane, and accordingly increased fluid velocity at the cross sectional area of the rotor plane.
  • the MAT may further include at least one ejector element.
  • the MAT provides a means of energizing the wake behind the rotor plane. The combination of the effects of the mixing elements and the energized wake provide a rapidly-mixed, shorter wake compared to the wake of horizontal axis wind turbines with open rotors.
  • a shrouded fluid turbine includes a ringed airfoil having a leading edge, a trailing edge, an outer surface, an inner surface, and a body extending from the leading edge to the trailing edge.
  • the shrouded turbine further includes a rotor surrounded by the ringed airfoil.
  • the rotor is disposed downstream of the leading edge and about a central axis of the fluid turbine.
  • the shrouded turbine further includes an aperture extending through the body of the ringed airfoil between the outer surface and the inner surface. The aperture is configured to mix a first fluid flow adjacent to the outer surface of the ringed airfoil and a second fluid flow downstream of the rotor.
  • the aperture may include one end disposed downstream of the rotor.
  • the shrouded fluid turbine may further include a plurality of mixing elements disposed on the trailing edge of the ringed airfoil.
  • Each of the mixing elements may be configured to further mix the first fluid flow adjacent to the outer surface of the ringed airfoil and the second fluid flow downstream of the rotor.
  • at least one of the mixing elements may extend downstream of the rotor.
  • at least one of the mixing elements may include a converging portion extending toward the central axis.
  • at least one of the mixing elements may include a diverging portion extending away from the central axis.
  • at least one of the mixing elements may include a converging portion extending toward the central axis and a diverging portion extending away from the central axis.
  • a first one of the mixing elements may include a converging portion extending toward the central axis and a second one of the mixing elements may include a diverging portion extending away from the central axis.
  • the fluid turbine may further include an ejector element disposed on the ringed airfoil proximal to a radial plane such that the ejector element is in fluid communication with the first one of the mixing elements.
  • the radial plane may extend outwardly from the central axis and pass through the first one of the mixing elements.
  • the ejector element may be configured to further mix the first fluid flow adjacent to the outer surface of the ringed airfoil and the second fluid flow downstream of the rotor.
  • at least a portion of the ejector element may include a surface of the second one of the mixing elements.
  • At least one of the mixing elements may be disposed on the inner surface of the ringed airfoil and may include a converging portion extending toward the central axis, and an ingress aperture adjacent to the inner surface of the ringed airfoil and configured to receive at least a portion of a third fluid flow adjacent to the inner surface. In some embodiments, at least one of the mixing elements may be configured to direct the received portion of the third fluid flow away from the inner surface.
  • a first one of the mixing elements may include a converging portion extending toward the central axis and a second one of the mixing elements may include a diverging portion extending away from the central axis.
  • the fluid turbine may further include an ejector element disposed on the ringed airfoil proximal to a radial plane such that the ejector element is in fluid communication with the second one of the mixing elements.
  • the radial plane may extend outwardly from the central axis and pass through the second one of the mixing elements.
  • the ejector element may be configured to further mix the first fluid flow adjacent to the outer surface and the second fluid flow downstream of the rotor.
  • the ringed airfoil may further include a faceted trailing edge.
  • the ringed airfoil may further include an outer surface and an inner surface.
  • the faceted trailing edge may be configured to mix, downstream of the rotor, a first fluid flow adjacent to the outer surface of the ringed airfoil and a second fluid flow adjacent to the inner surface of the ringed airfoil.
  • the faceted trailing edge may include a facet extending away from the central axis.
  • the shrouded fluid turbine may further include an ejector element disposed on the facet such that the ejector element is in fluid communication with the facet.
  • the ejector element may be configured to mix, downstream of the rotor, the first fluid flow adjacent to the outer surface of the ringed airfoil and the second fluid flow adjacent to the inner surface of the ringed airfoil.
  • a shrouded fluid turbine includes a ringed airfoil including a leading edge, a trailing edge, an outer surface and an inner surface, and a rotor surrounded by the ringed airfoil.
  • the rotor is disposed downstream of the leading edge and about a central axis of the fluid turbine.
  • the shrouded fluid turbine further includes a plurality of mixing elements disposed on the trailing edge of the ringed airfoil. Each of the mixing elements is configured to mix a first fluid flow adjacent to the outer surface and a second fluid flow downstream of the rotor.
  • the shrouded fluid turbine further includes a set of ejector elements disposed downstream of the rotor and at least partially surrounded by the ringed airfoil.
  • the set of ejector elements includes a converging portion extending toward the central axis and a diverging portion extending away from the central axis.
  • Each of the ejector elements is configured to mix a first portion of the second fluid flow downstream of the rotor and a second portion of the second fluid flow downstream of the rotor.
  • At least one of the mixing elements may extend downstream of the rotor. In some embodiments, at least one of the mixing elements may include a converging portion extending toward the central axis. In some embodiments, at least one of the mixing elements may include a diverging portion extending away from the central axis.
  • a shrouded fluid turbine includes a ringed airfoil having a leading edge, a trailing edge, an outer surface, an inner surface, and a body extending from the leading edge to the trailing edge.
  • the shrouded fluid turbine further includes a rotor surrounded by the ringed airfoil. The rotor is disposed downstream of the leading edge and about a central axis of the fluid turbine.
  • the shrouded fluid turbine further includes a plurality of mixing elements disposed on the trailing edge of the ringed airfoil.
  • Each of the mixing elements is configured to further mix a first fluid flow adjacent to the outer surface of the ringed airfoil and a second fluid flow downstream of the rotor.
  • the shrouded fluid turbine further includes a first one of the mixing elements including a converging portion extending toward the central axis, a second one of the mixing elements including a diverging portion extending away from the central axis, and an ejector element disposed on the ringed airfoil proximal to a radial plane such that the ejector element is in fluid communication with the second one of the mixing elements.
  • the radial plane extends outwardly from the central axis and passes through the second one of the plurality of mixing elements.
  • the ejector element is configured to further mix the first fluid flow adjacent to the outer surface and the second fluid flow downstream of the rotor.
  • At least one of the mixing elements extends downstream of the rotor.
  • Figure 1 is a front, right, perspective view of an example embodiment of the present disclosure.
  • Figure 2 is a front, right, perspective view of an example embodiment of the present disclosure.
  • Figure 3 is a rear, right, perspective view of the example embodiment of Figure 2.
  • Figure 4 is a side, orthographic, section view of the embodiment of Figures 2 and 3.
  • Figure 5 is a front, right, perspective view of an example embodiment of the present disclosure.
  • Figure 6 is a rear, right, perspective view of the example embodiment of Figure 5.
  • Figure 7 is a side, orthographic, section view of the embodiment of Figures 5 and 6.
  • Figure 8 is a front, right, perspective view of an example embodiment of the present disclosure.
  • Figure 9 is a rear, right, perspective view of the example embodiment of Figure 8.
  • Figure 10 is a side, orthographic, section view of the embodiment of Figures 8 and 9.
  • Figure 11 is a front, right, perspective view of an example embodiment of the present disclosure.
  • Figure 12 is a rear, right, perspective view of the example embodiment of Figure 11.
  • Figure 13 is a side, orthographic, section view of the embodiment of Figures 11 and 12.
  • Figure 14 is a front, right, perspective view of an example embodiment of the present disclosure.
  • Figure 15 is a rear, right, perspective view of the example embodiment of Figure 14.
  • Figure 16 is a side, orthographic, section view of the embodiment of Figures 14 and 15 illustrating a cut through the converging mixing element.
  • Figure 17 is a side, orthographic, section view of the embodiment of Figures 14 and 15 illustrating a cut through the diverging mixing element.
  • Figure 18 is a front, right, perspective view of an example embodiment of the present disclosure.
  • Figure 19 is a rear, right, perspective view of the example embodiment of Figure 18.
  • Figure 20 is a side, orthographic, section view of the embodiment of Figures 18 and 19.
  • Figure 21 is a front, right, perspective view of an example embodiment of the present disclosure.
  • Figure 22 is a rear, right, perspective view of the example embodiment of Figure 21.
  • Figure 23 is a side, orthographic, section view of the embodiment of Figures 21 and 22 illustrating a cut through the converging mixing element.
  • Figure 24 is a side, orthographic, section view of the embodiment of Figures 21 and 22 illustrating a cut through the diverging mixing element.
  • Figure 25 is a front, right, perspective view of an example embodiment of the present disclosure.
  • Figure 26 is a rear, right, perspective view of the example embodiment of Figure 25.
  • Figure 27 is a side, orthographic, section, detail view of the embodiment of Figures 25 and 26.
  • Figure 28 is a front, right, perspective view of an example embodiment of the present disclosure.
  • Figure 29 is a rear, right, perspective view of the example embodiment of Figure 28.
  • Figure 30 is a side, orthographic, section, detail view of the embodiment of Figures 28 and 29.
  • Figure 31 is a front, right, perspective view of an example embodiment of the present disclosure.
  • Figure 32 is a rear, right, perspective view of the example embodiment of Figure 31.
  • Figure 33 is a side, orthographic, section, detail view of the embodiment of Figures 31 and 32.
  • a turbine including a substantially ringed airfoil with mixing elements provides an improved means of extracting energy from fluid currents.
  • Some embodiments include ejector elements providing a mixer/ejector pump.
  • the substantially ringed airfoil surrounds a rotor, which extracts power from a primary fluid stream.
  • the substantially ringed airfoil, mixing elements and, in some embodiments, ejector elements draw more flow through the rotor allowing more energy extraction due to higher flow rates.
  • the MAT transfers energy from the bypass flow to the rotor wake flow allowing higher energy per unit mass flow rate through the rotor.
  • substantially ringed airfoil or a “ringed airfoil” may be used interchangeably and are not intended to be limiting in scope.
  • the present disclosure contemplates an airfoil that may be primarily ring shaped without interruption or may have regions where the airfoil has gaps and/or deviations in shape from the circular (e.g., substantially ringed) shape.
  • rotor is used herein to refer to any assembly in which one or more blades are attached to a shaft and able to rotate, allowing for the extraction of power or energy from wind rotating the blades.
  • Example rotors include a propeller- like rotor or a rotor/stator assembly. Any type of rotor may be enclosed within the turbine shroud in the wind turbine of the present disclosure.
  • the leading edge of a ringed airfoil may be considered the front of the fluid turbine, and the trailing edge of a ringed airfoil or ejector element may be considered the rear of the fluid turbine.
  • a first component of the fluid turbine located closer to the front of the turbine may be considered “upstream” of a second component located closer to the rear of the turbine. Put another way, the second component is "downstream" of the first component.
  • a fluid turbine includes a ringed airfoil that surrounds a rotor and includes mixing elements.
  • the ringed airfoil includes ejector elements that are disposed on an outer surface of the ringed airfoil and/or mixing elements.
  • FIG. 1 is a perspective view of an example embodiment 100 of a shrouded turbine.
  • the turbine 100 includes a substantially ringed airfoil 110, a nacelle body 150, a rotor 140, and mixing elements including converging mixing elements 117 that turn inwardly toward a central axis 105, and diverging mixing elements 115 that turn outwardly from the central axis 105.
  • the substantially ringed airfoil 110 includes a front end 112, also known as an inlet end or a leading edge. Mixing elements form a rear end 116, also known as an exhaust end or trailing edge.
  • Support structures 106 are engaged at the proximal end with the nacelle 150 and at the distal end with the ringed airfoil 110.
  • the rotor and hub 140, nacelle 150 and mixing elements 115, 117 are concentric about the central axis 105 and are supported by a tower structure 102.
  • the location of the mixing elements 115, 117 at the trailing edge of the substantially ringed airfoil 110 is solely for ease in describing the example embodiment, and is not intended to be limiting in scope. In accordance with other aspects of the present disclosure, the mixing elements 115, 117 may be positioned at any location on the surfaces of the substantially ringed airfoil 110.
  • FIG 2 is a front perspective view of an example embodiment 200 of a shrouded turbine.
  • Figure 3 is a rear perspective view of the embodiment 200 of Figure 2.
  • Figure 4 is a side, orthographic, section view of the embodiment 200 of Figure 2 taken along a line 2-2.
  • the shrouded turbine 200 includes a ringed airfoil 210 with bypass apertures or passages 219.
  • the ringed airfoil 210 includes a leading edge 212 and a trailing edge 216.
  • a body of the airfoil 215 extends from the leading edge 212 to the trailing edge 216.
  • Each aperture 219 extends from an outer surface 206 of the body 215 and through the body 215 to an inner surface 207 of the body 215.
  • one end 222 of the aperture 219 is located downstream of the rotor plane 209, although it will be understood that in other embodiments the end 222 of the aperture 219 may be located elsewhere along the inner surface 207 of the body 215, such as upstream of the rotor plane 209. In some embodiments, the apertures 219 can be located at regular intervals around the ringed airfoil 210.
  • a bypass flow passes from the exterior of the body 215 through each aperture 219 to the region downstream of the rotor plane 209.
  • Each aperture 219 provides mixing of the bypass flow 203, flowing adjacent to the outer surface 206, with a fluid stream, represented by arrow 204, flowing adjacent to the inner surface 207 in the region downstream of the rotor 140, also referred to as the rotor wake.
  • the aperture 219 may be referred to as a bypass duct.
  • the ringed airfoil 210 and apertures 219 transfer energy from the bypass flow 203 to the fluid stream 204.
  • the bypass flow 203 has greater energy content than that of the fluid stream 204 that has passed through the rotor and had energy extracted from it by the generator (not shown).
  • bypass flow 209 into the region downstream of the rotor plane 209 provides reduced pressure behind the rotor plane 209, and accordingly increased fluid velocity at the cross sectional area of the rotor plane. This allows a higher energy per unit mass flow rate through the rotor 140, which enhances the overall power production of the shrouded turbine 200.
  • FIG. 5 and Figure 6 are front and rear perspective views, respectively, of an example embodiment 300 of a shrouded turbine.
  • Figure 7 is a side, orthographic, section view of the embodiment 300 of Figure 5 taken along a line 5-5.
  • the shrouded turbine 300 includes a ringed airfoil 310 with converging mixing elements 317 and apertures or passages 319.
  • the ringed airfoil 310 includes a leading edge 312 and a trailing edge 316.
  • a body of the airfoil 315 extends from the leading edge 312 to the trailing edge 316.
  • the trailing edge 316 includes the converging mixing elements 317 having inner surfaces 318 exposed to a fluid stream 304 and outer surfaces 320 covered by the body 315.
  • the converging mixing elements 317 include a portion that extends inwardly toward the central axis 305 of the rotor 140.
  • Each aperture 319 extends from an outer surface 306 of the body 315 and through the body 315 to an inner surface 307 of the body 315.
  • one end 322 of the aperture 319 is located downstream of the rotor plane 309, although it will be understood that in other embodiments the end 322 of the aperture 319 may be located elsewhere along the inner surface 307 of the body 315, such as upstream of the rotor plane 309.
  • the apertures 319 can be located at regular intervals around the ringed airfoil 310.
  • a bypass flow passes from the exterior of the body 315 through each aperture 319 to the region downstream of the rotor plane 309.
  • the converging mixing elements 317 and the apertures 319 provide mixing of the bypass flow 303, flowing adjacent to the outer surface 306, with a fluid stream, represented by arrow 304, flowing adjacent to the inner surface 307 in the region downstream of the rotor 140, also referred to as the rotor wake.
  • the aperture 319 may be referred to as a bypass duct.
  • the ringed airfoil 310, including the converging mixing elements 317 and apertures 319 transfer energy from the bypass flow 303 to the fluid stream 304.
  • the bypass flow 303 has greater energy content than that of the fluid stream 304 that has passed through the rotor and had energy extracted from it by the generator (not shown).
  • Introducing the bypass flow 309 into the region downstream of the rotor plane 309 provides reduced pressure behind the rotor plane 309, and accordingly increased fluid velocity at the cross sectional area of the rotor plane. This allows a higher energy per unit mass flow rate through the rotor 140, which enhances the overall power production of the shrouded turbine 300.
  • FIG. 8 and Figure 9 are front and rear perspective views, respectively, of an example embodiment 400 of a shrouded turbine.
  • Figure 10 is a side, orthographic, section view of the embodiment 400 in Figure 8 taken along a line 8-8.
  • the shrouded turbine 400 includes a ringed airfoil 410 with converging mixing elements 417, diverging mixing elements 415 and bypass apertures or passages 419.
  • the ringed airfoil 410 includes a leading edge 412 and a trailing edge 416.
  • the trailing edge 416 includes the converging mixing elements 417 having inner surfaces 418 extending inwardly toward the central axis 405 of the rotor 140. The inner surfaces 418 are exposed to a fluid stream 404.
  • the trailing edge 416 further includes the diverging mixing elements 415 extending outwardly away from the central axis 405.
  • Each aperture 419 extends from an outer surface 406 of the diverging mixing elements 415 and through the diverging mixing elements 415 to an inner surface 407 of the diverging mixing elements 415.
  • one end 422 of the aperture 419 is located downstream of the rotor plane 409, although it will be understood that in other embodiments the end 422 of the aperture 419 may be located elsewhere along the inner surface 407 of the diverging mixing elements 415, such as upstream of the rotor plane 409.
  • the converging mixing elements 417, diverging mixing elements 415 and apertures 419 can be located at regular intervals around the ringed airfoil 410.
  • a bypass flow passes from the exterior of the diverging mixing elements 415 through the apertures 419 to the region downstream of the rotor plane 409.
  • the converging mixing elements 417, diverging mixing elements 415 and the apertures 419 provide mixing of the bypass flow 403, flowing adjacent to the outer surface 406, with a fluid stream, represented by arrow 404, flowing adjacent to the inner surface 407 in the region downstream of the rotor 140, also referred to as the rotor wake.
  • the aperture 419 may be referred to as a bypass duct.
  • the ringed airfoil 410 and apertures 419 transfer energy from the bypass flow 403 to the fluid stream 404.
  • FIG. 11 and Figure 12 are front and rear perspective views of an example embodiment 500 of a shrouded turbine.
  • Figure 13 is a side, orthographic, section view of the embodiment 500 in Figure 11 taken along a line 11-11.
  • the shrouded turbine 500 includes a ringed airfoil 510 with converging mixing elements 517.
  • the ringed airfoil 510 includes a leading edge 512 and a trailing edge 516.
  • the trailing edge 516 includes the converging mixing elements 517 having inner surfaces 518 extending inwardly toward the central axis 505 of the rotor 140.
  • the converging mixing elements 417 can be located at regular intervals around the ringed airfoil 410.
  • Converging mixing elements 517 are looped forms that engage with the trailing edge of the ringed airfoil 515 and have a leading edge 528 and a trailing edge 531.
  • the fluid stream through the inlet 512 of the ringed airfoil flows along the inner surface of the airfoil and divides into a first fluid stream 530 that remains attached to the airfoil and a second fluid stream 532 that is diverted by mixing element 517.
  • Dividing the first fluid stream 530 and the second fluid stream 532 into the region downstream of the rotor plane 509 provides reduced pressure behind the rotor plane 509, and accordingly increased fluid velocity at the cross sectional area of the rotor plane. This allows a higher energy per unit mass flow rate through the rotor 140, which enhances the overall power production of the shrouded turbine 500.
  • Figure 14 and Figure 15 are front and rear perspective views, respectively, of an example embodiment 600 of a shrouded turbine.
  • Figure 16 is a side, orthographic, section view of the embodiment 600 in Figure 14 taken along a line 14-14 cut through a converging mixing element 617.
  • Figure 17 is a side, orthographic, section view of the embodiment 600 in Figure 14 taken along a line 14' -14' cut through a diverging mixing element 615.
  • the shrouded turbine 600 includes a ringed airfoil 610 with converging mixing elements 617 and diverging mixing elements 615 as well as bypass apertures or passages 619 and ejector elements 627.
  • the ringed airfoil 610 includes a leading edge 612 and a trailing edge 616.
  • the trailing edge 616 includes the converging mixing elements 617 extending inwardly toward from the central axis 605 and the diverging mixing elements 615 extending outwardly away from the central axis 605.
  • At least one aperture 619 allows the introduction of bypass fluid flow 603 to enter the exiting stream behind the rotor plane 609.
  • Each aperture 619 extends through the diverging mixing elements 615.
  • one end of the aperture 619 is located downstream of the rotor plane 609, although it will be understood that in other embodiments the end of the aperture 619 may be located elsewhere, such as upstream of the rotor plane 609.
  • Additional bypass flow 604 is introduced to the fluid stream downstream from the rotor by at least one ejector element 627.
  • Each ejector element 627 is mounted on the ringed airfoil 610 and is proximal to the same radial plane as the corresponding converging mixing elements 617.
  • the ejector element 627 is proximal to the converging mixing elements 617 and is in fluid communication with the corresponding converging mixing element 617, and is not in fluid communication with the diverging mixing elements 615.
  • the converging mixing elements 617, diverging mixing elements 615, apertures 619 and ejector elements 627 can be located at regular intervals around the ringed airfoil 610.
  • the converging mixing elements 617 and the diverging mixing elements 615 may be alternately located adjacent to each other on the ringed airfoil 610.
  • the bypass flow passes from the exterior of the diverging mixing elements 615 through the apertures 619 to the region downstream of the rotor plane 609.
  • the converging mixing elements 617, diverging mixing elements 615 and the apertures 619 provide mixing of the bypass flow 603 and 604 with a fluid stream flowing in the region downstream of the rotor 140, also referred to as the rotor wake.
  • the aperture 619 may be referred to as a bypass duct.
  • the ringed airfoil 610, apertures 619 and ejector elements 627 transfer energy from the bypass flow 603 and 604 to the fluid stream.
  • the bypass flow 603 and 604 has greater energy content than that of the fluid stream that has passed through the rotor and had energy extracted from it by the generator (not shown). Introducing the bypass flow 603 and 604 into the region downstream of the rotor plane 609 provides reduced pressure behind the rotor plane 609, and accordingly increased fluid velocity at the cross sectional area of the rotor plane. This allows a higher energy per unit mass flow rate through the rotor 140, which enhances the overall power production of the shrouded turbine 600.
  • Figure 18 and Figure 19 are front and rear perspective views, respectively, of an example embodiment 700 of a shrouded turbine.
  • Figure 20 is a side, orthographic, section view of the embodiment 700 in Figure 18 taken along a line 18-18 cut through a diverging mixing element 715.
  • the shrouded turbine 700 includes a ringed airfoil 710 with converging mixing elements 717 and diverging mixing elements 715 as well as ejector elements 727.
  • the ringed airfoil 710 includes a leading edge 712 and a trailing edge 716.
  • the trailing edge 716 includes the converging mixing elements 717 extending inwardly toward from the central axis 705 and the diverging mixing elements 715 extending outwardly away from the central axis 705.
  • a bypass flow 704 is introduced to the fluid stream downstream from the rotor by at least one ejector element 727.
  • Each ejector element 727 is mounted on the ringed airfoil 710 and is proximal to the same radial plane as the corresponding diverging mixing elements 715.
  • the ejector element 727 is proximal to the corresponding diverging mixing element 715 and is in fluid communication with the corresponding diverging mixing element 715, and is not in fluid communication with the converging mixing elements 717.
  • the converging mixing elements 717, diverging mixing elements 715 and ejector elements 727 can be located at regular intervals around the ringed airfoil 710.
  • the converging mixing elements 717 and the diverging mixing elements 715 may be alternately located adjacent to each other on the ringed airfoil 710.
  • the ringed airfoil 710 and ejector elements 727 transfer energy from the bypass flow 704 to the fluid stream.
  • the bypass flow 704 has greater energy content than that of the fluid stream that has passed through the rotor and had energy extracted from it by the generator (not shown).
  • Introducing the bypass flow 704 into the region downstream of the rotor plane 709 provides reduced pressure behind the rotor plane 709, and accordingly increased fluid velocity at the cross sectional area of the rotor plane. This allows a higher energy per unit mass flow rate through the rotor 140, which enhances the overall power production of the shrouded turbine 700.
  • Figure 21 and Figure 22 are front and rear perspective views, respectively, of an example embodiment 800 of a shrouded turbine.
  • Figure 23 is a side, orthographic, section view of the embodiment 800 in Figure 21 taken along a line 21-21 cut through the diverging mixing element 815.
  • Figure 24 is a side, orthographic, section view of the embodiment 800 in Figure 21 taken along a line 2 -2 cut through the converging mixing element 817.
  • the shrouded turbine 800 includes a ringed airfoil 810 with converging mixing elements 817 and diverging mixing elements 815 as well as bypass ducts or passages 819.
  • the ringed airfoil 810 includes a leading edge 812 and a trailing edge 816.
  • the trailing edge 816 includes the converging mixing elements 817 and the diverging mixing elements 815.
  • Each aperture 819 extends through the ringed airfoil 810 and allow the introduction of bypass fluid flow 804 to enter the exiting stream behind the rotor plane 809 ( Figure 23). Additional bypass flow 803 is introduced to the downstream flow by the ejector elements 827.
  • Each ejector element 827 includes a leading edge 828 and a trailing edge 829.
  • the ejector element leading edge 828 is formed by the shape of the cut in the ringed airfoil 810.
  • the body of the ejector element airfoil section 827 includes a portion of the diverging mixing element 815.
  • the trailing edge of the mixing element 831 includes a shared trailing edge 816 of the ringed airfoil 810.
  • Each ejector element 827 is proximal to the same radial plane as the corresponding converging mixing element 817. In other words, each ejector element 827 is in fluid communication with the corresponding converging mixing elements 817 and shares an upper outer surface with diverging mixing elements 815, and does not engage with the inner surface of diverging mixing elements 815.
  • the ringed airfoil 810, converging mixing elements 817, diverging mixing elements 815 and ejector elements 827 transfer energy from the bypass flow 803 and 803 to the fluid stream passing through the rotor 140.
  • the bypass flow 804 has greater energy content than that of the fluid stream that has passed through the rotor 140 and had energy extracted from it by the generator (not shown).
  • Introducing the bypass flow 804 into the region downstream of the rotor plane 809 provides reduced pressure behind the rotor plane 809, and accordingly increased fluid velocity at the cross sectional area of the rotor plane. This allows a higher energy per unit mass flow rate through the rotor 140, which enhances the overall power production of the shrouded turbine 800.
  • Figure 25 and Figure 26 are front and rear perspective views, respectively, of an example embodiment 900 of a shrouded turbine.
  • Figure 27 is a side, orthographic, section view of the embodiment 900 in Figure 25 taken along a line 23-23 cut through a diverging mixing element 915.
  • the shrouded turbine 900 includes a ringed airfoil 910 with converging mixing elements 917 and diverging mixing elements 915 as well as a set of ejector elements 960 located downstream of the rotor 140, on the interior of the ringed airfoil 910, providing turbulent mixing and a low pressure region, downstream from the rotor plane 909.
  • the ringed airfoil 910 includes a leading edge 912 and a trailing edge 916.
  • the trailing edge 916 includes the converging mixing elements 917 and the diverging mixing elements 915.
  • the set of ejector elements 960 is proximal to the nacelle 950 and is downstream of the rotor 140.
  • the ejector elements 960 allow the introduction of bypass fluid flow 903 to enter the exiting stream behind the rotor plane 909 ( Figure 27). Additional mixing flow 907 is introduced to the downstream flow by converging ejector elements 927, which extend inwardly toward the central axis 905, and diverging ejector elements 925, which extend outwardly from the central axis 905.
  • the set of ejector elements 960 include a leading edge 922, the diverging ejector element 925 and the converging ejector element 927, and a trailing edge 929.
  • the leading edge 922 of the diverging ejector elements 925 includes a two sided airfoil, and the diverging ejector elements 925 include a narrow pressure side airfoil shape, also known as a one-sided airfoil.
  • a one-sided airfoil located on the interior of the ringed airfoil 910 provides the benefits of ejector elements, such as low pressure behind the rotor and additional wake mixing, without the mass or side wind loads that an ejector located on the outside of the ringed airfoil.
  • Figure 28 and Figure 29 are front and rear perspective views, respectively, of an example embodiment 1000 of a shrouded turbine.
  • Figure 30 is a side, orthographic, section view of the embodiment 1000 in Figure 28 taken along a line 28-28 cut through the center of a faceted segment 1015.
  • the ringed airfoil 1010 includes a substantially annular leading edge 1012 and a trailing edge 1016 as well as apertures or passages 1019 that provide mixing between bypass flow 1003 and the fluid stream downstream from the rotor plane 1009.
  • the trailing edge 1016 includes a faceted perimeter with nodes 1017 and facets 1015.
  • the faceted trailing edge 1016 provides stream-wise mixing.
  • Each aperture 1019 extends from an outer surface 1006 of the ringed airfoil 1010 and through to an inner surface 1007 of the ringed airfoil 1010.
  • one end 1022 of the aperture 1019 is located downstream of the rotor plane 1009, although it will be understood that in other embodiments the end 1022 of the aperture 1019 may be located elsewhere along the inner surface 1007 of the ringed airfoil 1010, such as upstream of the rotor plane 1009.
  • the apertures 1019 can be located at regular intervals around the ringed airfoil 1010.
  • the apertures 1019 allow the introduction of bypass fluid flow 1003 to enter the exiting stream behind the rotor plane 1009 ( Figure 30).
  • a bypass flow passes from the exterior of the ringed airfoil 1010 through the apertures 1019 to the region downstream of the rotor plane 1009.
  • Each aperture 1019 provides mixing of the bypass flow 1003, flowing adjacent to the outer surface 1006, with a fluid stream flowing adjacent to the inner surface 1007 in the region downstream of the rotor 1040, also referred to as the rotor wake.
  • the aperture 1019 may be referred to as a bypass duct.
  • the ringed airfoil 1010 and apertures 1019 transfer energy from the bypass flow 1003 to the fluid stream.
  • the bypass flow 1003 has greater energy content than that of the fluid stream that has passed through the rotor and had energy extracted from it by the generator (not shown).
  • Figure 31 and Figure 32 are front and rear perspective views, respectively, of an example embodiment 1100 of a shrouded turbine.
  • Figure 33 is a side, orthographic, section view of the embodiment 1100 in Figure 31 taken along a line 31-31 cut through the center of a faceted segment 1115.
  • a ringed airfoil 1110 includes a substantially annular leading edge 1112 as well as apertures or passages 1119 that provide mixing between bypass flow 1003, 1004 and the fluid stream downstream from the rotor plane 1109.
  • the ringed airfoil 1110 includes a leading edge 1112 and a trailing edge 1116.
  • the trailing edge 1116 includes a faceted perimeter with nodes 1117 and facets 1115.
  • Each aperture 1119 allows the introduction of bypass fluid flow 1103 to enter the exiting stream behind the rotor plane 1109 ( Figure 33).
  • Additional bypass flow 1104 is introduced to the downstream flow by each of the ejector elements 1127.
  • the additional bypass flow 1104 flows through an opening between each ejector element 1127 and each corresponding facet 1115.
  • Each ejector element 1127 includes a leading edge 1128 and a trailing edge 1129 and is mounted on the ringed airfoil proximal to the same radial plane as the respective facet 1115. In other words, each ejector element 1127 is proximal to the facets 1115 and is in fluid communication with the corresponding facets 1115.
  • the apertures 1119 and ejector elements 1129 can be located at regular intervals around the ringed airfoil 1110. For example, the apertures 1119 and ejector elements 1129 may be located adjacent to each other on the ringed airfoil 1110.
  • the bypass flow passes from the exterior of the ringed airfoil 1110 through the apertures 1119 to the region downstream of the rotor plane 1109.
  • Each aperture 1119 provides mixing of the bypass flow 1103 with a fluid stream flowing in the region downstream of the rotor 1140, also referred to as the rotor wake, and each ejector element 1127 provides mixing of the bypass flow 1104 with the fluid stream flowing in the region downstream of the rotor 1140.
  • the aperture 1119 may be referred to as a bypass duct.
  • the ringed airfoil 1110, apertures 1119 and ejector elements 1127 transfer energy from the bypass flow 1103 and 1104 to the fluid stream.
  • the bypass flow 1103 and 1104 has greater energy content than that of the fluid stream that has passed through the rotor and had energy extracted from it by the generator (not shown). Introducing the bypass flow 1103 and 1104 into the region downstream of the rotor plane 1109 provides reduced pressure behind the rotor plane 1109, and accordingly increased fluid velocity at the cross sectional area of the rotor plane. This allows a higher energy per unit mass flow rate through the rotor 1140, which enhances the overall power production of the shrouded turbine 1100.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Hydraulic Turbines (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

Dans l'invention, une turbine à fluide carénée comprend un profil d'aile à anneau qui présente un bord d'attaque, un bord de fuite, une surface extérieure, une surface intérieure, ainsi qu'un corps s'étendant depuis le bord d'attaque jusqu'au bord de fuite. Ladite turbine carénée comporte en outre un rotor entouré par le profil d'aile à anneau. Ce rotor se trouve en aval du bord d'attaque et autour d'un axe central de la turbine à fluide. La turbine carénée possède en outre une ouverture qui s'étend à travers le corps du profil d'aile à anneau entre la surface extérieure et la surface intérieure. Cette ouverture est conçue pour mélanger un premier flux de fluide à proximité de la surface extérieure dudit profil d'aile à anneau et un second flux de fluide en aval du rotor.
PCT/US2013/035922 2012-04-10 2013-04-10 Profil d'aile à anneau doté d'éléments de mélange WO2013155151A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261622078P 2012-04-10 2012-04-10
US61/622,078 2012-04-10

Publications (2)

Publication Number Publication Date
WO2013155151A2 true WO2013155151A2 (fr) 2013-10-17
WO2013155151A3 WO2013155151A3 (fr) 2013-11-28

Family

ID=48183008

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2013/035922 WO2013155151A2 (fr) 2012-04-10 2013-04-10 Profil d'aile à anneau doté d'éléments de mélange

Country Status (2)

Country Link
US (1) US20130266446A1 (fr)
WO (1) WO2013155151A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014194348A1 (fr) * 2013-06-04 2014-12-11 Elemental Energy Technologies Limited Éjecteur pour générateur d'électricité et ensemble générateur d'électricité

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170248114A1 (en) * 2014-03-31 2017-08-31 Soren Hjort A diffuser, user of a diffuser and a wind turbine comprising a diffuser
KR102358885B1 (ko) 2015-02-12 2022-02-08 하이드로키네틱 에너지 코퍼레이션 수력 발전/유체 동력학 터빈 및 이를 제조 및 사용하기 위한 방법
CN110073099A (zh) * 2016-11-29 2019-07-30 阿尔弗雷多·劳尔·卡列·马德里 单叶双曲面风能放大器
ES2966752T3 (es) 2019-08-20 2024-04-24 Calle Madrid Alfredo Raul Muro eólico
NO347351B1 (en) * 2021-07-02 2023-09-25 Verta As Vertical axis wind turbine
US11946441B2 (en) * 2022-02-10 2024-04-02 Kamil Podhola Outer turbine system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5761900A (en) 1995-10-11 1998-06-09 Stage Iii Technologies, L.C. Two-stage mixer ejector suppressor

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4075500A (en) * 1975-08-13 1978-02-21 Grumman Aerospace Corporation Variable stator, diffuser augmented wind turbine electrical generation system
US4204799A (en) * 1978-07-24 1980-05-27 Geus Arie M De Horizontal wind powered reaction turbine electrical generator
US4422820A (en) * 1982-09-29 1983-12-27 Grumman Aerospace Corporation Spoiler for fluid turbine diffuser
US4720640A (en) * 1985-09-23 1988-01-19 Turbostar, Inc. Fluid powered electrical generator
GB2376986B (en) * 2001-06-28 2003-07-16 Freegen Res Ltd Duct and rotor
US8021100B2 (en) * 2007-03-23 2011-09-20 Flodesign Wind Turbine Corporation Wind turbine with mixers and ejectors
US8393850B2 (en) * 2008-09-08 2013-03-12 Flodesign Wind Turbine Corp. Inflatable wind turbine
GB0908355D0 (en) * 2009-05-15 2009-06-24 Bailey Ralph Peter S Wind turbine diffuser
US8814493B1 (en) * 2010-07-02 2014-08-26 William Joseph Komp Air-channeled wind turbine for low-wind environments
US8016560B2 (en) * 2010-09-17 2011-09-13 General Electric Company Wind turbine rotor blade with actuatable airfoil passages
US8721279B2 (en) * 2011-04-27 2014-05-13 SkyWolf Wind Turbines Corp. Multiple mixing internal external fluid driven high efficiency wind turbine having reduced downstream pressure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5761900A (en) 1995-10-11 1998-06-09 Stage Iii Technologies, L.C. Two-stage mixer ejector suppressor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014194348A1 (fr) * 2013-06-04 2014-12-11 Elemental Energy Technologies Limited Éjecteur pour générateur d'électricité et ensemble générateur d'électricité

Also Published As

Publication number Publication date
US20130266446A1 (en) 2013-10-10
WO2013155151A3 (fr) 2013-11-28

Similar Documents

Publication Publication Date Title
US20130266446A1 (en) Ringed airfoil with mixing elements
JP5483484B2 (ja) 混合器と排出器とを有する風力タービン
US8657572B2 (en) Nacelle configurations for a shrouded wind turbine
US20090214338A1 (en) Propeller Propulsion Systems Using Mixer Ejectors
US20130266439A1 (en) Fluid turbine with vortex generators
ES2741595T3 (es) Rodete
US20040156710A1 (en) Ducted wind turbine
JP5454963B2 (ja) ミキサおよびエジェクタを備える水力タービン
MXPA06012371A (es) Paleta para un rotor de turbina de energia eolica.
JP2012503731A (ja) 混合器と排出器とを有する風力タービン
US20140169937A1 (en) Mixer-ejector turbine with annular airfoils
US8714923B2 (en) Fluid turbine
US20130309081A1 (en) Fluid turbine with rotor upwind of ringed airfoil
US20110085901A1 (en) Shrouded wind turbine with scalloped lobes
WO2010141807A2 (fr) Configurations de nacelle pour une éolienne carénée
US20130287543A1 (en) Down wind fluid turbine
US20110135460A1 (en) Fluid turbine with ejector shroud
US20110194936A1 (en) High efficiency turbine
US20110229315A1 (en) High efficiency rotor blades for a fluid turbine
US20110135458A1 (en) Fluid turbine with shroud having segmented lobes
WO2011100536A1 (fr) Turbine à fluide

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13718442

Country of ref document: EP

Kind code of ref document: A2

122 Ep: pct application non-entry in european phase

Ref document number: 13718442

Country of ref document: EP

Kind code of ref document: A2