DE3045695A1 - Wing design for wind-driven mechanism - has inclined auxiliary wing behind main wing, forming gap for increase of force - Google Patents

Wing design for wind-driven mechanism - has inclined auxiliary wing behind main wing, forming gap for increase of force

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Publication number
DE3045695A1
DE3045695A1 DE19803045695 DE3045695A DE3045695A1 DE 3045695 A1 DE3045695 A1 DE 3045695A1 DE 19803045695 DE19803045695 DE 19803045695 DE 3045695 A DE3045695 A DE 3045695A DE 3045695 A1 DE3045695 A1 DE 3045695A1
Authority
DE
Germany
Prior art keywords
wing
wind
increase
driven mechanism
force
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Withdrawn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
DE19803045695
Other languages
German (de)
Inventor
Hans 5300 Bonn Müller
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 DE19803045695 priority Critical patent/DE3045695A1/en
Publication of DE3045695A1 publication Critical patent/DE3045695A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D1/00Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06Rotors
    • F03D1/0608Rotors characterised by their aerodynamic shape
    • F03D1/0633Rotors characterised by their aerodynamic shape of the blades
    • F03D1/0641Rotors characterised by their aerodynamic shape of the blades of the section profile of the blades, i.e. aerofoil profile
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05BINDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00Components
    • F05B2240/20Rotors
    • F05B2240/30Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05B2240/301Cross-section characteristics
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction

Abstract

The wing of a wind driven mechanism consists of an auxiliary wing mounted behind the main wing at an angle of approximately 45 deg. A gap is left between them. The arrangement results in the increase of the lifting force of the wing at least 2.5 times. A similar arrangement is well known in the aircraft construction industry and is used as a take-off and landing aid under the name of the Fowler wing.

Description

Beschreibungdescription

Im Jahre 1925 har Prof. Betz in seinem Buch "Windenergie und ihre Ausnutzung durch Windmühlen" nachgewiesen, dassIn 1925 Prof. Betz demonstrated in his book "Wind energy and its utilization by windmills" that

1. nur 1/3 der im Winde enthaltenen Energie ausgenutzt werden kann. Der Rest wird zur Aufrechterhaltung des Prozesses benötigt.1. only 1/3 of the energy contained in the wind can be used. The rest is needed to keep the process running.

2. bei Ausnutzung des Widerstandes der Flügel nur 1/6 genutzt werden kann.2. If the resistance is used, the wing can only be used 1/6.

Für die maximale Leistung hat er folgende Formel aufgestellt:He created the following formula for maximum performance:

L[tief]max = v[hoch]3 / 27 . D[hoch]2 / 4 (mkg/sek) oderL [low] max = v [high] 3/27. D [high] 2/4 (mkg / sec) or

= 0,000 285 . v[hoch]3 . D[hoch]2 im kW.= 0.000 285. v [high] 3. D [high] 2 in kW.

Der von Prof. Betz entworfene Flügel verbreitert sich zum Drehpunkt hin beträchtlich.The wing designed by Prof. Betz widens considerably towards the pivot point.

Prof. Hütter hat nach dem Kriege die extrem schnell drehenden Windkraftanlagen entwickelt, und dies dadurch erreicht, dass die Flügelbreite möglichst schmal gehalten wurde, so dass Profile mit höherem Auftrieb verwendet werden konnten.After the war, Prof. Hütter developed the extremely fast rotating wind turbines and achieved this by keeping the wing width as narrow as possible so that profiles with higher lift could be used.

Den zur Zeit leistungsfähigsten Flügel besitzt der Voith-WEC 300, der am Rotor bei 8,5 m/sec Wind 315 Kw leistet. Nach Prof. Betz sind aber 475 kW möglich, so dass er einen Wirkungsgrad von 0,67 hat. Ein Flügel nach der Erfindung ist dadurch gekennzeichnet, dass hinter dem Flügel ein Hilfsflügel etwa 45° geneigt angebracht ist und zwischen beiden einen Spalt hat. Durch diese Anordnung wird erreicht, dass die Auftriebskraft des Flügels bis auf etwa den zweieinhalbfachen Wert gesteigert wird, so der von Prof. Betz angegebenen Wert in etwa erreicht werden kann. Figur 1The currently most powerful wing is the Voith-WEC 300, which has an output of 315 kW on the rotor at a wind speed of 8.5 m / sec. According to Prof. Betz, however, 475 kW are possible, so that it has an efficiency of 0.67. A wing according to the invention is characterized in that an auxiliary wing is attached at an angle of about 45 ° behind the wing and has a gap between the two. This arrangement ensures that the lift force of the wing is increased to about two and a half times the value, so that the value given by Prof. Betz can be reached. Figure 1

Diese Anordnung ist im Flugzeugbau als Start- und Landehilfe unter dem Namen Fowler-Flügel bekannt und langjährig erprobt.This arrangement is known in aircraft construction as a take-off and landing aid under the name Fowler wing and has been tried and tested for many years.

Quellennachweisreference

1. Windenergie und ihre Ausnutzung durch Windmühlen, Prof. Betz1. Wind energy and its use by windmills, Prof. Betz

2. Elementare Aerodynamik und Flugphysik, Günter Meyer, Leipzig2. Elementary aerodynamics and flight physics, Günter Meyer, Leipzig

3.3.


<NichtLesbar>
ttusreport Windenergie Oktober 1978, Bundesministerium für Forschung und Technik, S. 233 u.f.

<notreadable>
ttusreport wind energy October 1978, Federal Ministry for Research and Technology, p. 233 uf

Claims (1)

Ein Flügel für Windkraftanlagen der Erfindung ist dadurch gekennzeichnet, dass hinter dem Flügel ein Hilfsflügel etwa 45° geneigt angebracht ist und zwischen beiden einen Spalt hat. Durch diese Anordnung wird erreicht, dass die Auftriebskraft des Flügels bis auf etwa den zweieinhalbfachen Wert gesteigert wird, so dass der von Prof. Betz angegebenen Wert in etwa erreicht werden kann.A wing for wind turbines of the invention is characterized in that an auxiliary wing is attached at an angle of about 45 ° behind the wing and has a gap between the two. With this arrangement it is achieved that the lift force of the wing is increased up to about two and a half times the value, so that the value given by Prof. Betz can be reached.
DE19803045695 1980-12-04 1980-12-04 Wing design for wind-driven mechanism - has inclined auxiliary wing behind main wing, forming gap for increase of force Withdrawn DE3045695A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803045695 DE3045695A1 (en) 1980-12-04 1980-12-04 Wing design for wind-driven mechanism - has inclined auxiliary wing behind main wing, forming gap for increase of force

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803045695 DE3045695A1 (en) 1980-12-04 1980-12-04 Wing design for wind-driven mechanism - has inclined auxiliary wing behind main wing, forming gap for increase of force

Publications (1)

Publication Number Publication Date
DE3045695A1 true DE3045695A1 (en) 1982-08-19

Family

ID=6118274

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19803045695 Withdrawn DE3045695A1 (en) 1980-12-04 1980-12-04 Wing design for wind-driven mechanism - has inclined auxiliary wing behind main wing, forming gap for increase of force

Country Status (1)

Country Link
DE (1) DE3045695A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992001865A1 (en) * 1990-07-26 1992-02-06 Howden Wind Turbines Ltd. Wind turbine blade and rotor incorporating same
WO2010100237A2 (en) * 2009-03-06 2010-09-10 Vestas Wind Systems A/S A wind turbine providing increased power output

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992001865A1 (en) * 1990-07-26 1992-02-06 Howden Wind Turbines Ltd. Wind turbine blade and rotor incorporating same
WO2010100237A2 (en) * 2009-03-06 2010-09-10 Vestas Wind Systems A/S A wind turbine providing increased power output
WO2010100237A3 (en) * 2009-03-06 2011-07-14 Vestas Wind Systems A/S A wind turbine providing increased power output
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

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