WO2015113528A1 - Beidseitig wirkendes rotorblatt für energieerzeugende kraftanlagen - Google Patents
Beidseitig wirkendes rotorblatt für energieerzeugende kraftanlagen Download PDFInfo
- Publication number
- WO2015113528A1 WO2015113528A1 PCT/DE2014/000042 DE2014000042W WO2015113528A1 WO 2015113528 A1 WO2015113528 A1 WO 2015113528A1 DE 2014000042 W DE2014000042 W DE 2014000042W WO 2015113528 A1 WO2015113528 A1 WO 2015113528A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotor blade
- slat
- main wing
- blade according
- slat element
- Prior art date
Links
- 230000009977 dual effect Effects 0.000 title 1
- 230000003993 interaction Effects 0.000 claims abstract 3
- 230000004888 barrier function Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000001154 acute effect Effects 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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
- F03D1/0608—Rotors characterised by their aerodynamic shape
- F03D1/0633—Rotors characterised by their aerodynamic shape of the 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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/12—Blades; Blade-carrying rotors
- F03B3/121—Blades, their form or construction
-
- 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
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
-
- 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
- F05B2210/00—Working fluid
- F05B2210/40—Flow geometry or direction
- F05B2210/404—Flow geometry or direction bidirectional, i.e. in opposite, alternating directions
-
- 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
- F05B2240/20—Rotors
- F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
-
- 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 relates to a multilateral rotor blade for power generating power plants such as wind turbines,
- Tidal power plants or wave buoys in which the flow direction of a medium can change rapidly, in particular with a composite rotor blade, which consists of at least two wing elements.
- Main wing leaf on the front of a so-called asymmetrical slat is arranged while maintaining an air gap to the main wing blade, which extends approximately over two-thirds of the length of the main wing.
- EP 0 064 742 A2 has disclosed in the state of the art a rotor for a wind power plant, in which each rotor blade is associated with a slat of the same length such that the front edge of the front one
- Rotor blade laterally offset from the front edge of the underlying Rotor blade is located.
- the two tips of the rotor blades are adjustably coupled via a mechanical connection with each other.
- German Offenlegungsschrift DE 10 2012 102 746 A1 has disclosed a further rotor blade for wind energy plants, which has a slat in front of the main wing whose distance from the main wing can be adjusted.
- the slat has in the rear part of a concave curvature, the material is elastic, in order to adapt to the resulting by adjusting the slat different distances to the main wing can.
- Rotary axes adjusted depending on current needs by rotation of the plane of rotation about the vertical axis by means of an adjusting device.
- an adjusting device e.g. a rotor, in a wind tunnel, in the
- the rotor blade according to the invention for producing a resulting useful force (F) on the longitudinal axis of the rotor blade consists of at least one
- Main wing element and a slat element which are arranged one behind the other. It is also characterized by the aerodynamic
- the slat element Cooperation between the slat element and the main wing element in such a way that the resulting Nutzkraftcardi (F) is largely independent of the flow direction of the inflowing medium on the rotor plane.
- the medium flow By forming a gap s between the main vane element and the vane element, the medium flow, similar to a flow channel, is conducted at least in part due to the particular position and symmetrical profile of the vane element.
- the flow guided onto the main wing element facilitates the start-up of the turbine or of the impeller and on the other hand prevents the flow from being torn off, in particular during the start-up phase, which is particularly important in the case of a rapid temporary increase in the flow velocity.
- the slat element differs from the slats used in aviation in that the profile of the
- Slat element is formed symmetrically. Due to a mobility in a special embodiment of the slat element about his
- the advantage achieved with the present invention is that the flow is targeted in order to optimize the angle of attack ⁇ of the wing in the direction of higher glide ratio (ca / cw), where ca is the buoyancy value and cw is the resistance coefficient.
- ca the buoyancy value
- cw the resistance coefficient.
- the slat element is arranged with the main wing element in a plane, so that the outline results in an overall profile.
- the slat element and the main wing element is symmetrical, which simplifies, inter alia, the manufacture of the rotor blade.
- Another advantage is seen in that the slat element and the main wing element are arranged at a predetermined distance s from each other.
- the slat element is also advantageous for the slat element to be much smaller in cross-section than the main wing element.
- the gap width s between the slat element and the main wing element is substantially constant over the entire length of the slat element in the case of a rectangular wing top view, or, in the case of a non-rectangular plan view, is proportional to the local chord of the profile.
- the slat element is fixed and / or movable.
- Limiting elements are arranged above and below the slat element.
- the movable slat part is designed to be movable about its longitudinal axis.
- Limiting element can be canceled for control purposes, so as to effect a braking effect.
- leading edge of the slat element adjustable so as to change the overall profile of the rotor blade.
- Figure 1 is a schematic perspective plan view of the
- Figure 2 is a schematic cross section of a wing profile (4) of a
- FIG. 3 shows a vector diagram of a schematized wing plane (8) of a prior art wing, on which a resulting flow velocity vr is applied;
- Figure 5 is a graph of the power coefficient cN as
- Figure 6a is a schematic cross section of an inventive
- Main wing element (15 ') with a profile of the
- Main wing element (15 ') integrated movable
- Fig. 1 shows a schematic perspective top view of the
- the Wells turbine is a special air turbine that is generally used in so-called wave power plants with oscillating Water column is used.
- the Wells turbine operates at the same direction of rotation, regardless of the direction of flow of the respective medium.
- the median plane of the airfoil lies in the plane of rotation of the turbine and perpendicular to the flow direction.
- the rotation axis 3 is perpendicular to the plane of rotation of the impeller.
- FIG. 2 shows a schematic cross-section of a symmetrical one
- Wing profile 4 on which the resultant force component 6 at a certain angle ⁇ to the rotation axis 3 as a result of a medium flow 7 attacks.
- the middle profile plane 8 extends from the rear point 9 of the profile 4 to the front edge 10 of the profile and is parallel to the plane of rotation of the
- FIG. 3 shows the vector diagram of a schematized wing plane 8 of a Wells turbine, on which a resulting flow velocity vr acts, which felt a certain angle of attack ⁇ to the apparent one
- Rotor blade (4) (eg its extension);
- the angle of attack ⁇ is as large as the temporary resistance allows on the axis of rotation (3), wherein the resistance is mainly determined by the power generator, that is, by the load of the generator. The smaller the resistance, the smaller it is
- Flow velocity w (8) occur, for example in gusts.
- the useful force P (7) is next to the angle ⁇ a function of the square of the speed vr (10).
- the output power N is a function of the 3rd power of the velocity vr (10) and the angle ⁇ p. This means that these functions must have extremes.
- For the power N is this extremum is represented by the power value cN, which is shown in FIG. 5 for two different values of the angle ⁇ .
- the fact that the power coefficient cN is the largest at a small angle ⁇ (pitch angle) does not mean that only the smallest angle ⁇ can be used. At higher medium velocities V, the centrifugal forces and bending moments can destroy or destroy the turbine
- FIG. 4 shows a vector diagram of a symmetrical rotor blade 14 in different sections and its local angle of attack a.
- the rotor blades 14 are attached to a hub 13 on a rotation axis 3 in a conventional manner.
- FIG. 4 also illustrates how the resulting velocity (10) and angles of attack ⁇ , a 'affect different radii of the rotor blade 14.
- Table I shows how the angles of incidence ⁇ for two exemplary ratios of the speed of the sheet end ior (9) to the relative velocity of the medium w (8) for unrestricted rotor blades, ie for the case of the double-acting turbine.
- FIG. 5 shows a graphical representation of the power coefficient cN as a function of the speed coefficient V / w of the ratio of the velocity V of the flow medium to the relative velocity w of the medium at two different angles ⁇ 1 and ⁇ 2, where ⁇ 1 ⁇ 2. From this, is u.a.
- Performance coefficient cN which is reproduced in FIG. 5 for two different values of the angle ⁇ .
- 6a and 6b show two exemplary embodiments of the present invention which show a schematic cross section of a wing profile 14 ', 14 "according to the invention with a main wing element 15 and a symmetrical slat element 16, 16' arranged in front of the round edge 10 of the wing profile 15.
- the slat element 16 lies in the plane 17 which passes through the corner points 9 and 10 of the rear edge 9 and the front round edge 10 of the profile of the
- Main wing element 15 is clamped.
- the slat element 16 is fixedly arranged at a predetermined distance s from the round edge 10 of the main wing element 15. If the total profile 14 'flows around a medium flow 7, a part of the flow flows through the gap s and another part flows around the tip 10', whereby an additional buoyancy component is formed, which inclines the plane 17 by a small acute angle ⁇ .
- chord (17) is the diagonal between the rear end 9 of the Main wing element 15 and the front edge 10 of the slat element 16, 16 ', so the cooperating overall profile 14', 14 ", so that the
- Profile plane 17, 17 'tilts against the flow direction by a certain small acute angle (see Fig. 6a, 6b), whereby an additional useful force is created, which facilitates the start-up of a rotor.
- the gap s between main vane element 15 and vane element 16, 16 ' is the point at which the pressure is lowest. Therefore, this location ensures a good supply of the flowing medium, whereby the detachment of the
- Boundary layer on the leeward side of the main wing member 15 is prevented, which is of great importance for the environment of the rotation axis 3. It is equally important for the start-up phase in the area of the wing end, while the
- Circulation speed v relative to the speed w of the medium is small.
- FIG. 6b likewise shows a schematic cross section of a
- Main wing member 15 of the wing profile 14 "movably arranged
- Main wing element 15 is, but much smaller.
- This slat element 16 ' has in the front region an axis of rotation 11 about which the slat element 16' is rotatably mounted by a predetermined angle.
- the axis of rotation 11 extends over the entire length of the slat element 16 '.
- the angle of rotation ⁇ is adjusted by means of two limiting elements 12, 12 ', which are fastened at a suitable position on the main wing element 15.
- FIG. 7 shows a schematic perspective view of a section of the main wing element 15 'with a slat element 16 "integrated in the profile in the vicinity of the axis of rotation 3 of an impeller 1" according to the invention.
- the main wing element 15 ' is fixed to the hub 13 of the impeller 1 "by conventional means
- Main wing element attached to a slat element 16 ", in the profile of the
- Main wing element 15 ' is integrated, so that the front edge 10 of the
- the pivot axis 1 1 of the slat element 16 "is fastened laterally to the main wing element 15 and, if the requirements are met, can be moved forwards or backwards.
- FIG. 8 shows a graphical representation of the relative glide number of the
- Buoyancy value ca / cw (relative glide ratio) as a function of the relative thickness g of the main wing element 15 in relation to its width I.
- the curve 19 combines calculated values from measuring points which were recorded during experiments and experiments on the rotor blade 14 'according to the invention.
- the curve shows that the relative sliding number (ca / cw) becomes smaller as the relative thickness (g / l) of the rotor blade becomes larger.
Landscapes
- 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)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
- Hydraulic Turbines (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112014006328.2T DE112014006328A5 (de) | 2014-02-03 | 2014-02-03 | Beidseitig wirkendes Rotorblatt für energieerzeugende Kraftanlagen |
PCT/DE2014/000042 WO2015113528A1 (de) | 2014-02-03 | 2014-02-03 | Beidseitig wirkendes rotorblatt für energieerzeugende kraftanlagen |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DE2014/000042 WO2015113528A1 (de) | 2014-02-03 | 2014-02-03 | Beidseitig wirkendes rotorblatt für energieerzeugende kraftanlagen |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015113528A1 true WO2015113528A1 (de) | 2015-08-06 |
Family
ID=50884637
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2014/000042 WO2015113528A1 (de) | 2014-02-03 | 2014-02-03 | Beidseitig wirkendes rotorblatt für energieerzeugende kraftanlagen |
Country Status (2)
Country | Link |
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DE (1) | DE112014006328A5 (de) |
WO (1) | WO2015113528A1 (de) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0064742A2 (de) | 1981-05-07 | 1982-11-17 | Ficht GmbH | Rotor für eine Windkraftanlage |
GB2099929A (en) * | 1981-06-05 | 1982-12-15 | Escher Wyss Ltd | Turbine |
CH660770A5 (en) * | 1981-06-05 | 1987-06-15 | Escher Wyss Ag | Turbine |
DE102007021213A1 (de) * | 2007-05-07 | 2008-11-20 | Gernot Kloss | Flügelformen zur Leistungssteigerung beidseitig anströmbarer Turbinen für den Luft- und Wassereinsatz |
DE102008026474A1 (de) | 2008-06-03 | 2009-12-10 | Mickeler, Siegfried, Prof. Dr.-Ing. | Rotorblatt für eine Windkraftanlage sowie Windkraftanlage |
DE202012005356U1 (de) | 2012-05-30 | 2012-07-10 | Petra Staude | Rotorblatt für Windturbinen mit Profilen in Tandemanordnung |
DE102011000627A1 (de) * | 2011-02-10 | 2012-08-16 | Anneliese Penn | H-Rotor |
DE102012102746A1 (de) | 2011-03-30 | 2012-11-22 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Rotorblatt mit adaptivem Vorflügel für eine Windenergieanlage |
-
2014
- 2014-02-03 WO PCT/DE2014/000042 patent/WO2015113528A1/de active Application Filing
- 2014-02-03 DE DE112014006328.2T patent/DE112014006328A5/de not_active Withdrawn
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0064742A2 (de) | 1981-05-07 | 1982-11-17 | Ficht GmbH | Rotor für eine Windkraftanlage |
GB2099929A (en) * | 1981-06-05 | 1982-12-15 | Escher Wyss Ltd | Turbine |
CH660770A5 (en) * | 1981-06-05 | 1987-06-15 | Escher Wyss Ag | Turbine |
DE102007021213A1 (de) * | 2007-05-07 | 2008-11-20 | Gernot Kloss | Flügelformen zur Leistungssteigerung beidseitig anströmbarer Turbinen für den Luft- und Wassereinsatz |
DE102008026474A1 (de) | 2008-06-03 | 2009-12-10 | Mickeler, Siegfried, Prof. Dr.-Ing. | Rotorblatt für eine Windkraftanlage sowie Windkraftanlage |
DE102011000627A1 (de) * | 2011-02-10 | 2012-08-16 | Anneliese Penn | H-Rotor |
DE102012102746A1 (de) | 2011-03-30 | 2012-11-22 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Rotorblatt mit adaptivem Vorflügel für eine Windenergieanlage |
DE202012005356U1 (de) | 2012-05-30 | 2012-07-10 | Petra Staude | Rotorblatt für Windturbinen mit Profilen in Tandemanordnung |
Also Published As
Publication number | Publication date |
---|---|
DE112014006328A5 (de) | 2016-12-15 |
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