EP3280910A1 - Pale de rotor d'éolienne - Google Patents

Pale de rotor d'éolienne

Info

Publication number
EP3280910A1
EP3280910A1 EP16714435.1A EP16714435A EP3280910A1 EP 3280910 A1 EP3280910 A1 EP 3280910A1 EP 16714435 A EP16714435 A EP 16714435A EP 3280910 A1 EP3280910 A1 EP 3280910A1
Authority
EP
European Patent Office
Prior art keywords
rotor blade
flow
cylindrical body
wind turbine
control unit
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Withdrawn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
EP16714435.1A
Other languages
German (de)
English (en)
Inventor
Ralf Messing
Harro Harms
Hendrik JANSSEN
Andree Altmikus
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.)
Wobben Properties GmbH
Original Assignee
Wobben Properties GmbH
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 Wobben Properties GmbH filed Critical Wobben Properties GmbH
Publication of EP3280910A1 publication Critical patent/EP3280910A1/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Withdrawn legal-status Critical Current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
    • F03D—WIND MOTORS
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/0601—Rotors using the Magnus effect
    • 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 
    • F03D1/06—Rotors
    • 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 
    • F03D1/06—Rotors
    • F03D1/0608—Rotors characterised by their aerodynamic shape
    • F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
    • F03D1/0641—Rotors characterised by their aerodynamic shape of the blades of the section profile of the blades, i.e. aerofoil profile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C23/00—Influencing air flow over aircraft surfaces, not otherwise provided for
    • B64C23/08—Influencing air flow over aircraft surfaces, not otherwise provided for using Magnus effect
    • 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 relates to a wind turbine rotor blade and a wind turbine.
  • the present invention relates to a method for controlling a flow lag of a rotor blade of a wind turbine.
  • Wind turbines for use in power generation are well known and designed, for example, as in Fig. 1.
  • the mechanical power consumption of the rotor from the wind is inter alia dependent on the configuration of the rotor blades. Increased power consumption increases the efficiency and thus the yield of the wind turbine.
  • a common measure to further increase the yield of wind turbines is to increase the rotor diameter. With increasing rotor diameters usually also increase the profile depths of the rotor blade in the hub area. In the case of a large rotor diameter, the tread depths are so great that problems can arise during transport in view of predetermined maximum transport dimensions and thus with regard to transport logistics. To solve this problem, the use of so-called Fiatbackprofile is already known.
  • Fiatbackprofil Under such a Fiatbackprofil is understood below a shortened due to a thick, ie blunt trailing edge in profile depth direction profile. With such Fiatbackprofile logistics specifications can be taken into account regarding maximum transport dimensions.
  • a disadvantage of such Fiatbackprofilen is that the lift coefficient of the profile from a certain relative profile thickness compared to conventional profiles with the same relative profile thickness, but expiring, so sharper trailing edge, reduced and at the same time increases the coefficient of resistance. This leads to a deterioration of the aerodynamic power coefficient of the rotor blade and thus to yield losses of the wind turbine.
  • the rotor blade experiences a flow around the wind.
  • the flow around is fraught with friction.
  • the friction causes a region of detached flow behind the rotor blade, the so-called flow lag.
  • vortex form, which have an influence on the yield of the wind turbine.
  • the flow lag and thus also the number and size of the vortex are dependent on the configuration of the profile of the rotor blade.
  • a low flow lag is while favorable for the yield of the wind turbine.
  • Fiatbackprofilen or in approximately round cross sections, as they are partially used in the rotor hub occurs a large flow lag and, accordingly, large yield losses of the wind turbine.
  • the invention is therefore based on the object to address at least one of the problems mentioned.
  • a solution is to be created by which a loss of revenue of wind turbines with rotor blades with Fiatbackprofilen or with substantially round cross-sections is greatly reduced or in particular even avoided.
  • At least an alternative solution should be proposed.
  • the rotor blade in this case comprises an inner section in which the rotor blade is fastened to a rotor hub and an outer section which has a rotor blade tip.
  • the inner portion is fastened to the outer portion.
  • the rotor blade has at least partially in the inner portion of a Fiatbackprofil with a blunted trailing edge and on the Fiatbackprofil at least one flow control unit for controlling the flow caster on the rotor blade is provided.
  • the inner portion of the rotor blade can have the largest profile depth of the rotor blade in total. It extends in particular from the rotor blade root, so the connection area to the rotor blade hub to approximately the center of the rotor blade.
  • the rotor blade has in the inner portion at least partially on a Fiatbackprofil, so a profile that is shortened in profile depth direction and has a thick trailing edge.
  • the thickness of the trailing edge is preferably greater than 0.5 m, in particular it is in a range of 0.7 m to 5 m.
  • a Fiatbackprofile advantageously takes into account specifications from logistics with regard to maximum transport dimensions.
  • a load reduction in component-dimensioning load cases in strong winds due to the reduced tread depth is taken into account.
  • the rotor blade in the inner section has at least one flow control unit for controlling the flow follow-up on the rotor blade.
  • Such a control unit is designed in the form of moving walls or elements on the rotor blade surface.
  • the flow in particular at the trailing edge of the Fiatbackprofils, moves or accelerated.
  • the flow is deflected in the direction of the chord.
  • Under the profile tendon is a virtual straight line to understand that extends through the leading edge and the trailing edge.
  • This achieves a reduction of the flow lag with generally rising lift coefficients and reduced drag coefficients of the rotor blade.
  • significant increases in lift coefficients can be achieved in combination with a significant increase in the critical angle of attack of the tread when a stall occurs.
  • Fiatbackprofilen By using such a control unit in Fiatbackprofilen it is therefore possible to achieve lift coefficients as in conventional profiles with larger tread depths and thus to avoid losses in yield of the wind energy plant resulting from blade depth reduction.
  • the profile properties, ie lift and drag coefficient can be influenced via the control unit. This creates new opportunities for rotor blade design and system control.
  • Such a combination of Fiatbackprofilen with at least one control unit therefore combines the advantages of Fiatbackprofile with those of the conventional profiles of rotor blades, namely compliance with maximum transport dimensions of the rotor blade at the same time at least the same power of the wind turbine as a conventional profile.
  • the control unit has at least one cylindrical body with a longitudinal axis and the at least one cylindrical body is rotatable about the longitudinal axis. Due to the rotational movement of the at least one cylindrical body about its longitudinal axis, the flow is moved or accelerated at this point. The flow lag is reduced, which increases the lift coefficient.
  • a plurality of cylindrical bodies are provided on the Fiatbackprofil, which either each have a longitudinal axis and / or a common longitudinal axis aufwei- sen.
  • Such a cylindrical body is in particular designed as a hollow cylinder. leads. The size of such a cylindrical body varies in particular over the span of the rotor blade.
  • the control unit has at least one first cylindrical body with a first longitudinal axis and at least one second cylindrical body with a second longitudinal axis, and the at least one first cylindrical body is about the first longitudinal axis and the at least second cylindrical body about the second Rotatable longitudinal axis, and the first cylindrical body and the second cylindrical body are connected by means of a conveyor belt for moving a flow around the Fiatbackprofil.
  • the conveyor belt is provided in particular on the outer surfaces of the first and second cylindrical bodies, such that the conveyor belt is moved around the first and second cylindrical bodies.
  • the conveyor belt thus includes the first and the second cylindrical body.
  • the flow adheres to the conveyor belt and is thus accelerated or moved by the conveyor belt.
  • the flow is thereby deflected in the direction of the chord. This leads to a reduced flow lag.
  • the lift coefficient can be increased thereby.
  • the first longitudinal axis is arranged in profile depth direction in front of the second longitudinal axis, ie in particular between the truncated trailing edge and the second longitudinal axis, and / or the first longitudinal axis is arranged on an upper side of the profile and the second longitudinal axis on an underside of the profile.
  • the first and second cylindrical body is rotatable in and / or counter to the flow direction. Accordingly, the conveyor belt is rotatable in and / or counter to the flow direction.
  • the at least one control unit is provided at the truncated trailing edge.
  • the arrangement of the control unit at the trailing edge of a Fiatbackprofils the flow is moved or accelerated in particular at the trailing edge. This will deflect the flow to the chord. An abrupt flow separation at the trailing edge of the profile is thereby avoided and thus also a large flow lag.
  • significant increases in lift coefficients can be achieved in combination with an increase in the critical angle of attack upon stall occurrence. Yield losses of the wind turbine are avoided.
  • the at least one cylindrical body or the first and / or second cylindrical body is rotatable in and / or counter to a flow direction.
  • the flow occurring on the cylindrical body is thereby taken up and accelerated accordingly, so that a stall is delayed on the profile and the flow lag is reduced.
  • the buoyancy coefficient of the rotor blade increases and the drag coefficient is reduced.
  • the at least one cylindrical body or the first and / or second cylindrical body can be used flexibly.
  • the control unit is integrated in the rotor blade.
  • a rotor blade has at the top and the bottom of a panel, or called outer skin, on.
  • Such an outer skin defines an inner cavity and defines the outer contour of the profile of the rotor blade.
  • the control unit is integrated.
  • the rotor blade is constructed such that, in particular on the upper side and / or the underside, first a lining is provided on the profile of the rotor blade, in a further section the control unit is arranged and in a next section, lining is arranged again.
  • the control unit is therefore provided between the outer skin or the lining such that it comes in contact with the Windanströmung to mitzube admire this near the wall or to accelerate.
  • the control unit is largely protected against environmental influences and can also achieve a movement or acceleration of the flow at the surface of the profile.
  • the at least one control unit is provided on an upper side and / or a lower side of the Fiatbackprofils. At the top and bottom of the Fiatbackprofils the flow is applied. It corresponds to the suction or pressure side of the profile. The control unit then deflects the flow at this point and moves or accelerates it in such a way that a premature stall and thus a large wake region is avoided.
  • a baffle is arranged in particular between the trailing edge of the Fiatbackprofils and the control unit. The baffle deflects the flow already in the direction of the control unit. This moves the flow with and steers it further in the direction of chord, so that a large flow lag is avoided.
  • a plurality of cylindrical bodies are arranged on the Fiatbackprofil in the spanwise direction of the rotor blade.
  • the cylindrical body at least partially have a different diameter and / or a different length.
  • the plurality of cylindrical bodies that is to say at least two cylindrical bodies, are therefore arranged at different positions of the rotor blade, in particular at different positions between the rotor blade root and the rotor blade tip.
  • the plurality of cylindrical bodies have at least partially a different diameter and / or a different length. Accordingly, for example, a cylindrical body arranged close to the rotor blade root has a different diameter and / or a different length than a cylindrical body arranged close to the center of the rotor blade.
  • the diameters of the cylindrical body are adjusted accordingly.
  • some of the cylindrical bodies may have equal diameters and lengths, whereas other cylindrical bodies may have one of these different diameters or lengths.
  • the near-wall flow or flow at the trailing edge can be optimally moved or accelerated.
  • the plurality of cylindrical bodies are designed in particular as a hollow cylinder. In particular, they are arranged on a common shaft.
  • the plurality of cylindrical bodies are at least partially rotatable with a different speed.
  • the flow on the rotor blade has a different speed in the root area than at the rotor blade tip. According to the different speeds, the cylindrical bodies can be rotated at different speeds, so that the flow experiences an optimum acceleration for the corresponding position on the rotor blade.
  • a rotor blade of a wind turbine comprising an inner portion, in which the rotor blade is fastened to a rotor hub, and an outer portion, which has a rotor blade tip.
  • the rotor blade is characterized in that a root region is provided in the inner portion, which has a substantially circular cross-section, and wherein at least one control unit for controlling the flow caster on the rotor blade is provided on the substantially circular cross-section.
  • the yield losses of a wind turbine due to high turbulence generation are significant.
  • the flow can be controlled in the interior and thus also the flow lag. This will be the Increased lift coefficient at the substantially circular cross section and reduces the coefficient of resistance.
  • a method for controlling a flow lag of a rotor blade comprises moving an incoming flow to the rotor blade by means of at least one control unit, so that the flow lag is reduced. Due to the wind, there is a flow of wind on the individual rotor blades. The flow flows around the profile. By the at least one control unit, the flow is moved or accelerated so that a stall in profile depth direction is delayed further to the rear. As a result, the lift coefficient increases, the drag coefficient is reduced and the flow lag is reduced. The efficiency or yield of a wind turbine is increased.
  • the control unit rotates at a predetermined peripheral speed.
  • peripheral speed we mean in the present case the speed of the outer line of the control unit.
  • Fig. 2 shows a cross section of a rotor blade according to the prior
  • Fig. 5 shows an embodiment of an inventive
  • Fig. 6 shows a further embodiment of an inventive
  • Fig. 7 shows a further embodiment of an inventive
  • Fig. 8 shows a further embodiment of an inventive
  • FIG. 9 shows another embodiment of a rotor blade according to the invention.
  • Fig. 10 shows a cross section of the rotor blade of Fig. 9, and
  • Fig. 11 shows a cross section of a rotor blade according to one aspect of the
  • FIG. 1 shows a wind energy plant 100 with a tower 102 and a nacelle 104.
  • a rotor 106 with three rotor blades 108 and a spinner 110 is arranged on the nacelle 104.
  • the rotor 106 is set in rotation by the wind in rotation and thereby drives a generator in the nacelle 104 at.
  • FIG. 2 shows a cross-section of a profile 1 of a rotor blade of a wind energy plant according to the prior art.
  • a cross section has a front edge 2 and a trailing edge 3.
  • the trailing edge 3 runs pointed and flat.
  • the trailing edge thickness 8, that is, the thickness of the profile 1 at the trailing edge 3 is almost zero.
  • the maximum profile thickness 7 of the profile 1 is arranged in the direction of the front edge 2.
  • the chord 6 is shown extending from the front edge 2 to the trailing edge 3.
  • FIG. 3 shows a section of a rotor blade 20 according to the invention.
  • the rotor blade 20 is subdivided into an inner section 25 and an outer section 24.
  • the outer portion 24 has a rotor blade tip 21.
  • the Anschiuss to the rotor blade hub in the inner portion 25 is not shown.
  • FIG. 3 in the rotor blade 20 different dene cross sections or profiles 26, 27 shown.
  • three Fiatbackprofile 26 and a conventional profile 27 are shown.
  • two conventional profiles 27 can be seen.
  • the Fiatbackprofile 26 have at the trailing edge 23 a profile thickness 28 which is greater than zero, in particular in the range of 0.5 to 5 m.
  • the conventional profiles 27 run flat and pointed at the trailing edge 23 and accordingly have a thickness 28 of almost zero at the trailing edge 23.
  • a (flow) control unit for controlling the flow caster in the form of a cylindrical roller 33 is provided at the trailing edge 23.
  • Such a rotor blade holds in particular for the transport prescribed maximum transport dimensions.
  • it can produce at least the same power as a rotor blade with a conventional profile as shown, for example, in FIG. 2.
  • control units may be provided on such a flat back profile.
  • the several control units vary in particular in their diameter, their length and / or speed.
  • Fig. 4 shows the cross section of a Fiatbackprofils 26 without (flow) control unit.
  • the Fiatbackprofil 26 has a truncated trailing edge 23 with a large trailing edge thickness 28.
  • the Fiatbackprofil 26 is thereby impinged by a flow 29 of the wind.
  • the flow 29 divides and flows around the Fiatbackprofil 26 on the bottom 30 and the top 31st
  • the flow is applied to the top 31 and the bottom 30 at.
  • the flow 29 dissolves.
  • There are vortex 32 which form a flow lag on the rotor blade.
  • the lift coefficient of the Fiatbackprofils 26 is reduced and increases the coefficient of resistance.
  • the output of the entire wind turbine is reduced.
  • Fig. 5 shows a cross section of a rotor blade according to the invention.
  • the cross section is designed as Fiatbackprofil 46.
  • the Fiatbackprofil 46 has a front edge 42 and a trailing edge 43 and a top 51 and a bottom 50.
  • the trailing edge 43 has a large trailing edge thickness 48.
  • the Fiatbackprofil 46 is flowed around by a flow 49.
  • the flow 49 divides at the leading edge 42 to continue to flow on the top 51 and the bottom 50.
  • a first roller 53 and a second roller 54 are provided as an embodiment of a (flow) Kontroütician.
  • the first roller 53 is arranged on the upper side 51 and the second roller 54 on the underside 50.
  • the first roller 53 has a first one Longitudinal axis 55 and the second roller 54 has a second longitudinal axis 56.
  • the first roller 53 is rotatable about the first longitudinal axis 55 and the second roller 54 about the second longitudinal axis 56.
  • the directions of rotation are each shown by an arrow 57 and 58 respectively. Accordingly, the first roller 53 and the second roller 54 each rotate in the direction of the flow of the flow-around Fiatbackprofils 46.
  • the direction of rotation of the first and second rollers 53, 54 can also take place in each case in a clockwise direction, ie a roller rotates in the direction of flow and one against the flow.
  • the flow 49 is picked up by the first roller 53 and the second roller 54 and thus moved or accelerated.
  • the flow lag is reduced.
  • There are fewer and smaller vertebrae 52 in the region of the trailing edge 43.
  • the lift coefficient of the rotor blade is thereby increased and the drag coefficient is reduced.
  • FIG. 6 shows another embodiment of a cross section of a Fiatbacksprofils 66 of a rotor blade of a wind turbine.
  • the Fiatbackprofil 66 is thereby flows around by a flow 69.
  • the Fiatbackprofil 66 has a top 71 and a bottom 70 and a truncated trailing edge 63 and a leading edge 62.
  • a first conveyor belt 81 and a second conveyor belt 79 is provided as an embodiment for a (flow) control unit.
  • the first conveyor belt 81 and the second conveyor belt 79 enclose a first pair of rollers 73 and a second pair of rollers 74, each comprising two rollers arranged in profile depth direction.
  • the first conveyor belt 81 and the second conveyor belt 79 connect the two rollers of the first roller pair 73 and the two rollers of the second roller pair 74 with each other.
  • the first conveyor belt 81 is arranged on the upper side 81 and the second conveyor belt 79 on the underside of the rear edge 63 of the Fiatbackprofils 66.
  • the flow 69 is moved by the first conveyor belt 71 and second conveyor belt 79. The flow lag is thereby reduced.
  • FIG. 7 shows a further embodiment of a cross section of a rotor blade according to the invention of a wind energy plant.
  • the cross section is designed as Fiatbackprofil 460.
  • the Fiatbackprofil 460 has a front edge 420 and a trailing edge 430 and a top 510 and a bottom 500.
  • the Fiatbackprofil 460 is flowed around by a flow 490.
  • the flow 490 splits at the leading edge 420 to flow around the top 510 and the bottom 500.
  • first roller 530 and a second roller 540 are a first roller 530 and a second roller 540 as an embodiment of a (flow) control unit in the rotor blade integrated, so the first roller 530 and the second roller 540 are not provided as a conclusion of the trailing edge 430. Behind the trailing edge 430, the first roller 530 and the second roller 540 are arranged, wherein behind the first roller 530 and the second roller 540 also a first panel 511 and a second panel 501 is provided. Thus, the first roller 530 and the second roller 540 are at least partially enclosed in the Fiatbackprofil 460. The first roller 530 and the second roller 540 move the flow 490 and yet are largely protected from environmental influences. Thus, the first roller 530 and the second roller 540 have a long life. The wake flow is reduced in this embodiment in its extension. Therefore, this embodiment also has the aforementioned advantages.
  • the Fiatbackprofil 660 is thereby flowed around by a flow 690.
  • the Fiatbackprofil 660 has a top 710 and a bottom 700 and a truncated trailing edge 630 and a front edge 620.
  • a first conveyor belt 712 and a second conveyor belt 790 is provided at the trailing edge 630.
  • the first conveyor belt 712 and the second conveyor belt 790 thereby enclose a first pair of rollers 730 and a second pair of rollers 740, each comprising two rollers arranged in profile depth direction.
  • the first conveyor belt 712 and the second conveyor belt 790 are each integrated into the rotor blade.
  • a first panel 711 and a second panel 701 is provided behind the first conveyor belt 712 and the second conveyor belt 790.
  • the first roller 730 and the second roller 740 are at least partially enclosed in the Fiatbackprofil 660.
  • the rotor blade 200 has a front edge 220 and a trailing edge 230, as well as an inner section 250 and an outer section 240.
  • the root area 251 of the rotor blade 200 is provided, ie the area in FIG the rotor blade 200 is connected to the rotor blade hub.
  • the root area 251 in this case has a round cross section 252.
  • the outer portion 240 extends in about half of the rotor blade 200 up to the rotor blade tip 210.
  • two first rollers 253 are provided as an embodiment of two control units.
  • the two first rollers 253 are cylindrical.
  • FIG. 10 shows the round cross section 252 of the rotor blade 200 from FIG. 9.
  • the circular cross section 252 is surrounded by an air flow 290 of the wind.
  • On one side of the round cross section 252 are a first roller 253 and a second roller 254 arranged.
  • the first roller 253 has a first longitudinal axis 255 and the second roller 254 has a second longitudinal axis 256.
  • the first roller 253 and the second roller 254 rotate in the direction of the arrow 257 and 258, ie in the direction of the flow 290.
  • the Flow lag reduced, vortex generation reduced, thereby increasing the lift coefficient and reducing drag coefficient. This increases the yield of the wind turbine.
  • the first and second rollers 253, 254 may each rotate in a clockwise direction, ie, the first roller 253 rotates with the flow and the second roller 254 rotates counter to the flow.
  • two guide plates 259 can be seen in FIG. 10, which connect the round cross section 252 to the first roller 253 and the second roller 254, respectively.
  • baffles 259 By the baffles 259, the flow in the direction of the first roller 253 and the second roller 254 is directed. The flow is thereby directed from the outsides of the circular cross section towards the center. The flow is controlled and accordingly the flow lag.
  • FIG. 11 shows a schematic cross section of a wind turbine rotor blade according to a further exemplary embodiment of the invention.
  • the cross section is designed as Fiatbackprofil 46.
  • the Fiatbackprofil has a front edge 42 and a trailing edge 43 and a top 51 and a bottom 50 on.
  • the trailing edge 43 has a first and a second recess 43a, 43b.
  • a first roller 53 is provided in the region of the first recess 43a and a second roller 54 is provided in the region of the second recess 43b.
  • the first roller 43 has a first longitudinal axis 55 and the second roller 54 has a second longitudinal axis 56.
  • the first roller 53 is rotatable about the first longitudinal axis 55 and the second roller 54 is rotatable about the second longitudinal axis 56.
  • the directions of rotation are each represented by an arrow 57, 58.
  • the rotational direction of the first and second rollers is the same. This thus means that the first roller rotates in the flow direction while the second roller 54 rotates counter to the flow direction.
  • the first and second rollers 53, 56 are provided in the first and second recesses 43a, 43b so that the first and second rollers are provided within an imaginary elongated contour of the top and bottom 51, 50.
  • first and second rollers are embedded in the profile contour of the rotor blade by the rollers are provided in the region of the first and second recesses.
  • the first and second rollers 53, 54, 253, 254 are arranged in the region of the Fiatbackprofil that they do not protrude beyond the elongated trailing edge profile contour.
  • the rotor blade were not provided with a Fiatbackprofil, then the roles would have to be within the contour of the imaginary trailing edge.
  • the two rollers are thus within an imaginary contour of the trailing edge when this trailing edge is extended with the present gradient.

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

Abstract

L'invention concerne une pale de rotor (20, 108, 200) d'une éolienne (100), comprenant une portion intérieure (25, 250), dans laquelle la pale de rotor (20, 108, 200) est fixée à un moyeu de rotor, et une portion extérieure (24, 240), qui est reliée à la pale de rotor (20, 108, 200) et qui possède une pointe de pale de rotor (21). La pale de rotor (20, 108, 200) dans la portion intérieure (25, 250) possède en outre au moins partiellement un profil à dos plat (26, 66, 46, 460) avec un bord arrière tronqué (23, 63, 630) et sur le profil à dos plat (26, 66, 46, 460) se trouve au moins une unité de contrôle (33, 53, 54, 79, 81) destinée au contrôle de l'inertie d'écoulement sur la pale de rotor (20, 108, 200).
EP16714435.1A 2015-04-10 2016-04-06 Pale de rotor d'éolienne Withdrawn EP3280910A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015206430.1A DE102015206430A1 (de) 2015-04-10 2015-04-10 Rotorblatt einer Windenergieanlage
PCT/EP2016/057467 WO2016162350A1 (fr) 2015-04-10 2016-04-06 Pale de rotor d'éolienne

Publications (1)

Publication Number Publication Date
EP3280910A1 true EP3280910A1 (fr) 2018-02-14

Family

ID=55661452

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16714435.1A Withdrawn EP3280910A1 (fr) 2015-04-10 2016-04-06 Pale de rotor d'éolienne

Country Status (11)

Country Link
US (1) US20180135592A1 (fr)
EP (1) EP3280910A1 (fr)
JP (1) JP6490235B2 (fr)
CN (1) CN107438713A (fr)
AR (1) AR106149A1 (fr)
BR (1) BR112017021493A2 (fr)
CA (1) CA2979125A1 (fr)
DE (1) DE102015206430A1 (fr)
TW (1) TW201710598A (fr)
UY (1) UY36613A (fr)
WO (1) WO2016162350A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018103678A1 (de) * 2018-02-19 2019-08-22 Wobben Properties Gmbh Rotorblatt einer Windenergieanlage mit einer Splitterplatte

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WO2016162350A1 (fr) 2016-10-13
DE102015206430A1 (de) 2016-10-13
TW201710598A (zh) 2017-03-16
US20180135592A1 (en) 2018-05-17
AR106149A1 (es) 2017-12-20
JP2018510995A (ja) 2018-04-19
CN107438713A (zh) 2017-12-05
UY36613A (es) 2016-11-30
BR112017021493A2 (pt) 2018-07-03
CA2979125A1 (fr) 2016-10-13
JP6490235B2 (ja) 2019-03-27

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