DE2908761A1 - Blade for wind-powered motor - has auxiliary pivoted flap, secondary blade or internal flow passages - Google Patents

Blade for wind-powered motor - has auxiliary pivoted flap, secondary blade or internal flow passages

Info

Publication number
DE2908761A1
DE2908761A1 DE19792908761 DE2908761A DE2908761A1 DE 2908761 A1 DE2908761 A1 DE 2908761A1 DE 19792908761 DE19792908761 DE 19792908761 DE 2908761 A DE2908761 A DE 2908761A DE 2908761 A1 DE2908761 A1 DE 2908761A1
Authority
DE
Germany
Prior art keywords
blade
wind
flow passages
internal flow
powered motor
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Withdrawn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
DE19792908761
Other languages
German (de)
Inventor
Hans Mueller
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19792908761 priority Critical patent/DE2908761A1/en
Publication of DE2908761A1 publication Critical patent/DE2908761A1/en
Withdrawn legal-status Critical Current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
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/022—Adjusting aerodynamic properties of the blades
    • F03D7/0232—Adjusting aerodynamic properties of the blades with flaps or slats
    • 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
    • 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
    • F05B2240/31—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor of changeable form or shape
    • 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

Abstract

The blade has a normal aerodynamic basic shape, but incorporates additional elements for increasing the lift and facilitating start-up and slow-down of the motor. These elements may comprise pivoted flaps auxiliary blades or channels formed within the body of the blade for reducing the boundary layer or directing the air stream to the underneath of the blade, these also allow the weight of the blade to be reduced. The blade provides an increased power output for the same blade dia. and wind velocity, e.g. for a blade dia. of 12 metres and a wind velocity of 8 metres/second the delivered power output is 14.2 kilowatt. The blade is pref. of similar shape to the blade design for aircraft.

Description

B e s c h r e i b u n g Description

1. Seit Jahrhunderten ist die BoS und die Holländer- W i n d a ii h 1 e bekannt.1. For centuries the BoS and the Dutch- W i n d a ii h 1 e known.

Sie wurde für die verschiedensten Zwecke eingesetzt. Ihre Leistung ist für heutige Verhältnisse zu gering. It was used for a wide variety of purposes. Their performance is too low for today's conditions.

Bei 12 m Flügekkreisdurchmesser und 8 m/s Wind leistet sie 5 kW. (1) 21 Seit etwa 100 Jahren sind amerikanische Windräder ii Gebrauch. Ihre Leistung konnen nach der Formel N = k . F . v3 (in PS) berechnet werden. (2) Ein Windrad mit 12 m Flügelkreis und 8 m/s Wind leistet 13,2 kW (18 PS). With a flight circle diameter of 12 m and a wind speed of 8 m / s, it has an output of 5 kW. (1) 21 American wind turbines ii have been in use for about 100 years. Their performance can according to the formula N = k. F. v3 (in PS) can be calculated. (2) A wind turbine with a 12 m wing circle and 8 m / s wind has an output of 13.2 kW (18 HP).

3) Otto Lilienthal (3) hat 1873 gefunden, daß gewölbte Flächen, wenn sie von einer Seite angeblasen werden, an der gewölbten Fläche eine Kraft entwickeln, die weit größer ist, als der Widerstand den die Fläche dem Winde bietet. Dieser Tatsache ist es überhaupt erat su verdanken, daß wir fliegen können. Diese grdßere Kraft, die die Fläche zu heben versucht, nennt man Auftrieb, die andere, rechtwinklig zu ihr, wird Widerstand genannt. Lilienthal berechnete den Auftrieb seiner Flugzeuge nach folgender Formel L = 0,18 . F . v2.3) Otto Lilienthal (3) found in 1873 that curved surfaces, if they are blown from one side, develop a force on the curved surface, which is far greater than the resistance offered by the surface to the wind. This In fact, it is thanks to us that we can fly. This bigger one The force that tries to lift the surface is called lift, the other, right-angled to her, is called resistance. Lilienthal calculated the lift of his aircraft according to the following formula L = 0.18. F. v2.

In desl zwanziger Jahren tauchten die ersten Windmotore auf1 deren Flügel den Flugzeugflügeln nachgebidet waren. Sie entsprachen aerodynamischen Gesetzen. The first wind motors appeared in the 1920s Wings were shaped like airplane wings. They conformed to aerodynamic laws.

Prof. Prandtl, der diese Zusammenhänge um den Flügel untersuchte und beschrieb, kam auf die Formel A - Ca . F/#/2 . v2 (in kp). Prof. Prandtl, who examined these connections around the grand piano and described, came up with the formula A - Ca. F / # / 2. v2 (in kp).

Hierin ####/# /2 (= Masse des Luftgewichts / 2) und v2 von der Fläche unabhängige Größen sind. Die Flächengröße kann nach dem Verwendungszweck verändert werden, während Ca, der Auftriebsbeiwert, im Windkanal festgelgt wird und die aerodynamische Güte der Fläche darstellt. Für Segelflugzeu##Profile liegt ## zwischen 1,0 und 1,3. (4) Nach dem Kr#ege hat Prof. Rütter die Erkenntnisse aus dem Segelflugzeugbau für die Konstruktion der Flügel fur Windmotore ausgenutzt. Die Flügel dieser motore werd### einen Ca-Wert von 1,3 besitzen. Here #### / # / 2 (= mass of the air weight / 2) and v2 of the area are independent quantities. The size of the area can be changed according to the intended use while Ca, the lift coefficient, is fixed in the wind tunnel and the aerodynamic Represents the quality of the surface. For gliders ## profiles ## is between 1.0 and 1.3. (4) After the Kr # ege, Prof. Rütter has the knowledge from the glider construction for the construction of the blades for wind motors was used. The wings of these motore ### will have a Ca value of 1.3.

I)er vielbesprochene Windmotor auf Sylt leistet bei 11 m » und 8 m/s Wind 12 kg (5). I) the much talked about wind engine on Sylt performs at 11 m »and 8 m / s wind 12 kg (5).

Da mir keine weiteren vergleichbaren, genaueren Werte bekannt sind, habe ich die Flächen eines Windmotors Bit Segelfluzeugflächen nachgerechnet und kam bei einem Flügelkreisdurchmesser von 12 m und 8 m/s Wind auf 14,2 kW. Since I am not aware of any other comparable, more precise values, I have calculated the areas of a wind engine bit glider areas and came to 14.2 kW with a wing circle diameter of 12 m and 8 m / s wind.

4. Flügel für Windmotore nach dem Patenanspruch sind übliche Flügel, die nach aerodynamischen Grundsätzen aufgebaut sind aber dadurch gekennzeichnet, daß sie bekannte Elemente enthalten, die der Auftriebserhöhung dienen und als "Start- oder Landehilfen" bekannt sind. Z.B. Klappen, Vorflügel und auch Vorrichtungen zumAbsaugen der Grenzschicht oder zum Anbl@en Strömung auf der Oberseite der Fläche.4. Wings for wind motors according to the patent claim are common wings, which are built according to aerodynamic principles but are characterized by that they contain known elements that serve to increase buoyancy and serve as "starting or landing aids "are known. E.g. flaps, slats and also devices for suction the boundary layer or for sight flow on the upper side of the surface.

Als Beispiele möchte ich anführen:(4): Wölbungsklappe eit Spalt, sie erreicht ein Ca - 2,0 Fig. 1, Fowler-Flügel mit Spalt, er erreicht ein Ca w 3,15 Fig. 2 und einen besonders hohen Flügel an dem die Grenzschicht abgesaugt werden kann, er erreicht einen Ca= 5,1 Fig. 3 Das Absaugen der Luft kann durch einen Injektor am freien Flügelende oder durch den hohlen Flügelholm erfogen. Der geringe Kraftaufwand dafir fällt gegenüber dem Leistungsgewinn kaum ins Gewicht. I would like to cite as examples: (4): flap with a gap, it reaches a Ca - 2.0 Fig. 1, Fowler wing with a gap, it reaches a Ca w 3, 15 Fig. 2 and a particularly high wing on which the boundary layer is sucked off can, it reaches a Ca = 5.1 Fig. 3 The suction of the air can through an injector at the free end of the wing or through the hollow wing spar. The little effort this is hardly significant compared to the gain in performance.

Aufstellung lfd. Art Flügel- Wind Leistung effektive Leistung Nr. # v kW bezogen auf den Ansellwinkel 1 Windmühle 12 m 8 5 2 Windrad 12 m 8 13,2 5 Windmotor (Sylt) 11 m 8 12 4 Windmotor, errechnet 12 m 8 14,2 Wölbungsklappe mit Spalt 12 m 8 22 12° = 0,98 . æ 22 - 21,5 kW Fowler-Flügel mit Spalt 12 m 8 45,7 160 = 0,96 . 43,7 = 41,7 kW Sonderprofil 12 m 8 55 33° = 0,84 . 55 = 46 kW Somit ergibt sich eine Leistungssteigerung von maximal auf den dreifachen Wert. Set-up Running Type Wing Wind Power Effective Power No. # v kW related to the Ansellwinkel 1 windmill 12 m 8 5 2 wind turbine 12 m 8 13.2 5 Wind motor (Sylt) 11 m 8 12 4 wind motor, calculates 12 m 8 14.2 flap with Gap 12 m 8 22 12 ° = 0.98. æ 22 - 21.5 kW Fowler sash with a gap of 12 m 8 45.7 160 = 0.96. 43.7 = 41.7 kW special profile 12 m 8 55 33 ° = 0.84. 55 = 46 kW Thus the result is an increase in performance of a maximum of three times the value.

Quellenangabe (1) Sonnenenergie 6/78, Deutsche Gesellschaft für Sonnenenergie, München (2) Hütte,II, Ausgabe 1908 (3) Strömungslehre von Ludwig Prandtl 2. Auflage, S. 178 (4) Elementare Aerodynamik und Flügphysik, Günter Meyer, Leipzg, S. Source reference (1) Sonnenenergie 6/78, German Society for Solar Energy, Munich (2) Hütte, II, edition 1908 (3) Fluid mechanics by Ludwig Prandtl 2nd edition, P. 178 (4) Elementary aerodynamics and flight physics, Günter Meyer, Leipzg, p.

( wie (1), S. 19 L e e r s e i t e (as (1), p. 19 L e r s e i t e

Claims (1)

Patent anspruch Flügel für Windmotore nach dem Patentanspruch sind Flügel, die nach üblichen aerodynamischen Grundsätzen aufgebaut sind, aber dadurch gekennzeichnet sind, daß sie die bekannten ßlemente enthalten, die der Auftriebserhöhung dienen und als "Start- und Landehilfen" bekannt sind. Patent claim Wings for wind motors according to the patent claim are Wings that are built according to the usual aerodynamic principles, but because of this are characterized in that they contain the known elements that increase buoyancy serve and are known as "take-off and landing aids".
DE19792908761 1979-03-06 1979-03-06 Blade for wind-powered motor - has auxiliary pivoted flap, secondary blade or internal flow passages Withdrawn DE2908761A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19792908761 DE2908761A1 (en) 1979-03-06 1979-03-06 Blade for wind-powered motor - has auxiliary pivoted flap, secondary blade or internal flow passages

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792908761 DE2908761A1 (en) 1979-03-06 1979-03-06 Blade for wind-powered motor - has auxiliary pivoted flap, secondary blade or internal flow passages

Publications (1)

Publication Number Publication Date
DE2908761A1 true DE2908761A1 (en) 1980-09-18

Family

ID=6064646

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19792908761 Withdrawn DE2908761A1 (en) 1979-03-06 1979-03-06 Blade for wind-powered motor - has auxiliary pivoted flap, secondary blade or internal flow passages

Country Status (1)

Country Link
DE (1) DE2908761A1 (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3018211A1 (en) * 1980-05-13 1981-11-26 Eisenwerke Kaiserslautern Entwicklungsgesellschaft mbH, 6750 Kaiserslautern Wind turbine with vertical axis - has blade profiles adjusted by wind direction to achieve max. efficiency
EP0102657A1 (en) * 1982-07-28 1984-03-14 Transinvest B.V. Device for converting wind energy into another form of energy
US4692095A (en) * 1984-04-26 1987-09-08 Sir Henry Lawson-Tancred, Sons & Co. Ltd. Wind turbine blades
DE4014685A1 (en) * 1988-09-16 1991-12-12 Alfred Frohnert Propeller wind power machine - has aerofoil blades with hinged flap on ŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸ leading edge
DE4030509A1 (en) * 1990-09-27 1992-04-02 J Peter Fritz Blade for wind driven machine - has auxiliary blades mounted on leading edge and on trailing edge
US5256034A (en) * 1991-04-19 1993-10-26 Sultzbaugh John S Variable pitch propeller for use in conjunction with a vertical axis wind turbine
EP1375911A1 (en) * 2001-03-26 2004-01-02 Hitachi Zosen Corporation Propeller type windmill for power generation
EP1524431A1 (en) 2003-10-16 2005-04-20 Natenco Natural Energy Corporation GmbH Wind turbine blade with trailing edge flaps
FR2957387A1 (en) * 2010-03-09 2011-09-16 Erick Gros-Dubois Wind turbine blade for aerofoil of wind turbine, has deflection device whose deflection and guidance walls are extended along air ejection direction presenting component turned contrary to rear face of blade
CN102414440A (en) * 2009-03-06 2012-04-11 维斯塔斯风力系统有限公司 A wind turbine providing increased power output
CN102661239A (en) * 2012-05-17 2012-09-12 甘肃科惠特资源综合开发有限公司 Multi-wing collecting vane capable of utilizing wind power efficiently
CN104254688A (en) * 2012-02-20 2014-12-31 西班牙阿尔斯通可再生能源有限公司 Wind turbine blade and method of controlling the lift of such a blade
DE102018100397A1 (en) * 2018-01-10 2019-07-11 Wobben Properties Gmbh Wind energy plant with end edge flow flap
CN111188731A (en) * 2020-01-15 2020-05-22 河南科技大学 Vertical axis wind wheel with separation wing type lift-drag fusion of fish gill and fish belly cavity
CN113557357A (en) * 2019-02-11 2021-10-26 丹尼尔·瓜里利亚 Wind turbine

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3018211A1 (en) * 1980-05-13 1981-11-26 Eisenwerke Kaiserslautern Entwicklungsgesellschaft mbH, 6750 Kaiserslautern Wind turbine with vertical axis - has blade profiles adjusted by wind direction to achieve max. efficiency
EP0102657A1 (en) * 1982-07-28 1984-03-14 Transinvest B.V. Device for converting wind energy into another form of energy
US4550259A (en) * 1982-07-28 1985-10-29 Transinvest B.V. Device for converting wind energy into another form of energy
US4692095A (en) * 1984-04-26 1987-09-08 Sir Henry Lawson-Tancred, Sons & Co. Ltd. Wind turbine blades
DE4014685A1 (en) * 1988-09-16 1991-12-12 Alfred Frohnert Propeller wind power machine - has aerofoil blades with hinged flap on ŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸ leading edge
DE4030509A1 (en) * 1990-09-27 1992-04-02 J Peter Fritz Blade for wind driven machine - has auxiliary blades mounted on leading edge and on trailing edge
US5256034A (en) * 1991-04-19 1993-10-26 Sultzbaugh John S Variable pitch propeller for use in conjunction with a vertical axis wind turbine
EP1375911A1 (en) * 2001-03-26 2004-01-02 Hitachi Zosen Corporation Propeller type windmill for power generation
EP1375911A4 (en) * 2001-03-26 2005-11-23 Hitachi Shipbuilding Eng Co Propeller type windmill for power generation
EP1524431A1 (en) 2003-10-16 2005-04-20 Natenco Natural Energy Corporation GmbH Wind turbine blade with trailing edge flaps
DE10348060A1 (en) * 2003-10-16 2005-05-19 Natenco-Natural Energy Corp. Gmbh Rotor blade of a rotor of a wind energy plant
DE10348060B4 (en) * 2003-10-16 2016-10-27 Windreich GmbH Rotor blade of a rotor of a wind energy plant
CN102414440A (en) * 2009-03-06 2012-04-11 维斯塔斯风力系统有限公司 A wind turbine providing increased power output
CN102414440B (en) * 2009-03-06 2014-04-09 维斯塔斯风力系统有限公司 Wind turbine providing increased power output
FR2957387A1 (en) * 2010-03-09 2011-09-16 Erick Gros-Dubois Wind turbine blade for aerofoil of wind turbine, has deflection device whose deflection and guidance walls are extended along air ejection direction presenting component turned contrary to rear face of blade
CN104254688A (en) * 2012-02-20 2014-12-31 西班牙阿尔斯通可再生能源有限公司 Wind turbine blade and method of controlling the lift of such a blade
US9803619B2 (en) 2012-02-20 2017-10-31 Alstom Renewable Technologies Wind turbine blade and method of controlling the lift of such a blade
CN102661239A (en) * 2012-05-17 2012-09-12 甘肃科惠特资源综合开发有限公司 Multi-wing collecting vane capable of utilizing wind power efficiently
CN102661239B (en) * 2012-05-17 2014-09-24 甘肃科惠特资源综合开发有限公司 Multi-wing collecting vane capable of utilizing wind power efficiently
DE102018100397A1 (en) * 2018-01-10 2019-07-11 Wobben Properties Gmbh Wind energy plant with end edge flow flap
WO2019138008A1 (en) 2018-01-10 2019-07-18 Wobben Properties Gmbh Wind turbine with trailing edge flap
US11655797B2 (en) 2018-01-10 2023-05-23 Wobben Properties Gmbh Wind turbine with trailing edge flap
CN113557357A (en) * 2019-02-11 2021-10-26 丹尼尔·瓜里利亚 Wind turbine
CN111188731A (en) * 2020-01-15 2020-05-22 河南科技大学 Vertical axis wind wheel with separation wing type lift-drag fusion of fish gill and fish belly cavity
CN111188731B (en) * 2020-01-15 2021-06-04 河南科技大学 Vertical axis wind wheel with separation wing type lift-drag fusion of fish gill and fish belly cavity

Similar Documents

Publication Publication Date Title
DE2908761A1 (en) Blade for wind-powered motor - has auxiliary pivoted flap, secondary blade or internal flow passages
DE2412069A1 (en) WING AREA FOR SUPER SOUND AIRCRAFT
Korbacher Aerodynamics of powered high-lift systems
DE842330C (en) Wind power plant
DE19828720A1 (en) Glider with auxiliary propulsion and electrical motor unit
DE867380C (en) Wind turbine
Campbell Overview of powered-lift technology
CA1260277A (en) High mach number unducted fan engine
DE3039193C2 (en) Method for reducing the overall drag of aircraft
Freeman Comparison of Full-Scale Propellers Having RAF-6 and Clark Y Airfoil Sections
DE759892C (en) Blading for steam or gas turbines
Cleary Effects of Compressibility on Maximum Lift Coefficients for Six Propeller Airfoils
Wetzel et al. Influence of Vortex Generators on NREL S807 Airfoil Aerodynamic Characteristics and Wind Turbine Performance
DE3045695A1 (en) Wing design for wind-driven mechanism - has inclined auxiliary wing behind main wing, forming gap for increase of force
DE10328249A1 (en) Blade profile for rotor blade of wind-powered energy plant provided by combination of resistance rotor blade and aerodynamic rotor blade
Shaw Aerodynamic Characteristics of Thick Sharp Edged Cropped Delta and Gothic Wings giving Low Lift-Dependent Drag
Hickey V/STOL aerodynamics: A review of the technology
DE3729087A1 (en) Balloon wind power station
Igra Shrouded wind turbine research in Israel
DE1066429B (en)
Marsden Circling performance of sailplanes
Lomax THEORETICAL LIFT DEVELOPED ON RECTANGULAR WINGS ENTERING GUSTS AT SUBSONIC AND SUPERSONIC SPEEDS
Gruschwitz et al. A simple method for increasing the lift of airplane wings by means of flaps
Bloy et al. Trailing Edge Wedge Flaps for Wind-Turbine Blades
Schrenk Experiments with suction-type wings

Legal Events

Date Code Title Description
8139 Disposal/non-payment of the annual fee