DE4030509A1 - Blade for wind driven machine - has auxiliary blades mounted on leading edge and on trailing edge - Google Patents

Blade for wind driven machine - has auxiliary blades mounted on leading edge and on trailing edge

Info

Publication number
DE4030509A1
DE4030509A1 DE4030509A DE4030509A DE4030509A1 DE 4030509 A1 DE4030509 A1 DE 4030509A1 DE 4030509 A DE4030509 A DE 4030509A DE 4030509 A DE4030509 A DE 4030509A DE 4030509 A1 DE4030509 A1 DE 4030509A1
Authority
DE
Germany
Prior art keywords
blade
leading edge
auxiliary
wing
wind driven
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.)
Granted
Application number
DE4030509A
Other languages
German (de)
Other versions
DE4030509C2 (en
Inventor
J Peter Fritz
Holger Brammer
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 DE4030509A priority Critical patent/DE4030509C2/en
Publication of DE4030509A1 publication Critical patent/DE4030509A1/en
Application granted granted Critical
Publication of DE4030509C2 publication Critical patent/DE4030509C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F03D1/0608—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
    • 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
    • F05B2240/301—Cross-section characteristics
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (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)
  • Wind Motors (AREA)

Abstract

The blade of a wind driven machine consists of a main blade (B) to which two auxiliary blades (A,C) are attached. The main blade (B) has a pressure surface of elliptical form and has asymmetrical pressure and suction surfaces with the suction surface area being 1.03 times as great as the pressure surface area. The first auxiliary blade (B) is mounted at the leading edge of the main blade and forms a nozzle with the leading edge. The second auxiliary blade (C) is mounted beyond the trailing edge of the main blade. USE/ADVANTAGE - Blade for wind machine which utilises wind energy more effectively.

Description

Soweit dem Anmelder bekannt ist, liegt hierbei eine Neuent­ wicklung nach historischem Vorbild vor, nach: "Wissenschaftlich technische Enzyklopädie", V. Krünitz, Band 95, Seite 469.As far as the applicant is aware, there is a new one Development based on the historical model, after: "Scientific and technical encyclopedia", V. Krünitz, Volume 95, page 469.

Zudem wurden umfangreiche Windkanalversuche durchgeführt.Extensive wind tunnel tests were also carried out.

Die Aufgabe der Erfindung besteht darin, eine möglichst op­ timale Ausnutzung von Luftbewegungen zu erzielen.The object of the invention is to achieve an op to achieve maximum utilization of air movements.

Die Aufgabe wird durch einen Hauptflügel, dessen Druckfläche Teil einer Ellipse ist und ungleiche Flächen hat, sowie zwei Hilfsflügel besitzt, gelöst.The task is through a main wing, the pressure area Is part of an ellipse and has uneven surfaces, as well as two Has auxiliary wing, solved.

Mit der Erfindung können Windgeschwindigkeiten zwischen 3 m/s und Sturmböen über eine entsprechende Windkraftanlage ausgenutzt werden. Die gemessenen Werte, bezogen auf Quadrat­ meter überstrichene Flügelfläche, liegen bei 1200 Watt bei günstigen Verhältnissen. Also dem mehrfachen herkömmlicher Windkraftanlagen.With the invention, wind speeds between 3 m / s and gusts of wind from a suitable wind turbine be exploited. The measured values, based on square meter swept wing area, are 1200 watts favorable conditions. So the multiple conventional Wind turbines.

Die erzielten Werte lassen auf eine bessere kommerzielle Aus­ nutzung von Windanlagen schließen.The values achieved suggest a better commercial outcome close use of wind turbines.

Das Flügelprofil besteht aus drei einzelnen Flügeln, einem Haupt- und zwei Hilfsflügeln.The wing profile consists of three individual wings, one Main and two auxiliary wings.

Der Hauptflügel hat eine parabelförmige Druckfläche sowie eine Sogfläche, die in einem Verhältnis L/1,03 stehen. Vor der Nase des Hauptflügels ist ein Hilfsflügel mit der Breite L/3,54 zur Druckfläche mit einem Luftspalt L/58 angebracht, welcher für eine beschleunigte Abführung der Luft auf der Sogseite des Flügelprofils sorgt. Wichtig sind die gegeneinanderstehenden gewölbten Flächen des Haupt­ flügels zu dem Hilfsflügel, wodurch eine Düsenwirkung ent­ steht.The main wing has a parabolic pressure area as well a suction area, which have a ratio L / 1.03. In front of the nose of the main wing is an auxiliary wing with the Width L / 3.54 to the printing surface with an air gap L / 58 attached, which for an accelerated removal of the Air on the suction side of the wing profile provides. Are important the opposing curved surfaces of the head wing to the auxiliary wing, thereby ent a nozzle effect stands.

Die Profile sind ellipsenförmig konstruiert. The profiles are elliptical.  

Der hintere Hilfsflügel hat eine Breite L/4,14 mit dem Abstand L/11,6 zum Hauptflügel. Das Profil des hinteren Hilfsflügels ist neutral, d. h. gleiche Druck- bzw. Sogfläche. Dieser hintere Hilfsflügel unterbindet eine ungünstige Wir­ belbildung an der Abrißkante des Hauptflügels und verlagert diese Wirbel hinter den Flügel.The rear auxiliary wing has a width L / 4.14 with the Distance L / 11.6 to the main wing. The profile of the rear Auxiliary wing is neutral, i. H. same pressure or suction area. This rear auxiliary wing prevents an unfavorable we Formation on the tear-off edge of the main wing and shifted these eddies behind the wings.

Die Größe L wird entsprechend der zu verwendenden Flügelan­ zahl sowie der gewünschten Leistung der Windkraftanlage de­ finiert.The size L is according to the wing to be used number and the desired output of the wind turbine de finishes.

Die genaue Form des Hauptflügels und der Hilfsflügel ist in der Zeichnung dargestellt und kann hieraus entnommen werden.The exact shape of the main wing and the auxiliary wing is in shown in the drawing and can be seen from it.

In der Zeichnung sind dargestellt:
A = vorderer Hilfsflügel
B = Hauptflügel
C = hinterer Hilfsflügel.The drawing shows:
A = front auxiliary wing
B = main wing
C = rear auxiliary wing.

Claims (1)

Flügel für Windkraftanlagen, der dadurch gekennzeichnet ist, daß er einen Hauptflügel, dessen Druckfläche Teil einer Ellipse ist und ungleiche Flächen hat, sowie zwei Hilfsflügel besitzt.Blade for wind turbines, which is characterized in that it has a main blade, the pressure surface of which is part of an ellipse and has uneven surfaces, and two auxiliary blades.
DE4030509A 1990-09-27 1990-09-27 Wind turbine blades Expired - Fee Related DE4030509C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4030509A DE4030509C2 (en) 1990-09-27 1990-09-27 Wind turbine blades

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4030509A DE4030509C2 (en) 1990-09-27 1990-09-27 Wind turbine blades

Publications (2)

Publication Number Publication Date
DE4030509A1 true DE4030509A1 (en) 1992-04-02
DE4030509C2 DE4030509C2 (en) 1994-09-08

Family

ID=6415052

Family Applications (1)

Application Number Title Priority Date Filing Date
DE4030509A Expired - Fee Related DE4030509C2 (en) 1990-09-27 1990-09-27 Wind turbine blades

Country Status (1)

Country Link
DE (1) DE4030509C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK178423B1 (en) * 2010-07-21 2016-02-22 Gen Electric Rotor Blade Assembly

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2908761A1 (en) * 1979-03-06 1980-09-18 Hans Mueller Blade for wind-powered motor - has auxiliary pivoted flap, secondary blade or internal flow passages
DE3300083A1 (en) * 1983-01-04 1984-07-26 Erich Herter TURBINE FOR IMPLEMENTING PARTICULAR WIND ENERGY
GB2185788A (en) * 1986-01-28 1987-07-29 Nei International Research & D Blade for wind turbine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2908761A1 (en) * 1979-03-06 1980-09-18 Hans Mueller Blade for wind-powered motor - has auxiliary pivoted flap, secondary blade or internal flow passages
DE3300083A1 (en) * 1983-01-04 1984-07-26 Erich Herter TURBINE FOR IMPLEMENTING PARTICULAR WIND ENERGY
GB2185788A (en) * 1986-01-28 1987-07-29 Nei International Research & D Blade for wind turbine

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CH-Z.: Technische Rundschau, Bern Nr. 6 3.2.81, S. 12 *
DE-Fachbuch "Windkraftanlagen" E. Hau, Springer Verlag 1988, S. 104-112 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK178423B1 (en) * 2010-07-21 2016-02-22 Gen Electric Rotor Blade Assembly

Also Published As

Publication number Publication date
DE4030509C2 (en) 1994-09-08

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee