DE19529096A1 - Frusto-conical type wind-power generator with boundary layer division - Google Patents
Frusto-conical type wind-power generator with boundary layer divisionInfo
- Publication number
- DE19529096A1 DE19529096A1 DE19529096A DE19529096A DE19529096A1 DE 19529096 A1 DE19529096 A1 DE 19529096A1 DE 19529096 A DE19529096 A DE 19529096A DE 19529096 A DE19529096 A DE 19529096A DE 19529096 A1 DE19529096 A1 DE 19529096A1
- Authority
- DE
- Germany
- Prior art keywords
- cone
- turbine
- air
- speed
- boundary layer
- 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
Links
- 230000001419 dependent effect Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 2
- 208000012661 Dyskinesia Diseases 0.000 description 1
- 208000015592 Involuntary movements Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000017311 musculoskeletal movement, spinal reflex action Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect 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
- 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
- F03D7/0244—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor for braking
- F03D7/0252—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor for braking with aerodynamic drag devices on 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
- F05B2240/10—Stators
- F05B2240/13—Stators to collect or cause flow towards or away from turbines
-
- 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
- F05B2250/00—Geometry
- F05B2250/20—Geometry three-dimensional
- F05B2250/23—Geometry three-dimensional prismatic
- F05B2250/232—Geometry three-dimensional prismatic conical
-
- 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
Description
Bei Kleinanlagen mit einem Durchmesser bis etwa 5 m ist der Repeller-Rotor wegen seiner schlechten Anlauf-Eigenschaften im Binnenland nur sehr bedingt einsatzfähig. Andererseits ergeben Ausführungen mit vielflügeligen Rotoren, z. B. die Western-Rotoren, nicht nur Vorteile wegen deren gutem Anlauf verhalten, sie beinhalten zugleich den Nachteil des schlechten Wirkungsgrades bei großen Windstärken. In der Windkrafttechnik werden für Klein-Anlagen deshalb Turbinen mit Kegel-Abdeckungen benutzt, um den Luftstrom aus der Mitte an den Rand zu den Flügeln zu leiten, der dadurch komprimiert und deshalb leistungs fähiger wird. Um den Luftstau bei größeren Windgeschwindigkeiten und damit eine Leistungsminderung weitgehend zu vermeiden, sind bisher einige technische Vorrichtungen erdacht worden. In DE-OS 38 36 325 z. B. sind auf die Turbinenummantelung mehrere hohle Flügel gesetzt, die Luft aus dem Bereich der Turbinen-Innenflügel absaugen. Dazu ist der Kegel mit einem Abstand vor die Turbine gesetzt, so daß die Luft bei einem plötzlichen Druck anstieg (Böen) zur Mitte ausweisen kann. Nachteilig könnte bei dieser Anordnung die Vermischung der Grenzschicht-Luft vor und hinter den Turbinenflügeln sein, d. h., die Luft, die zur Mitte der Turbine ausweicht, kann ungeregelt hinter die Turbinenflügel gelanten und damit den Sog anderen Saugseite unterbrechen.For small systems with a diameter of up to about 5 m Repeller rotor because of its poor start-up properties Can only be used to a very limited extent inland. On the other hand result in designs with multi-bladed rotors, e.g. B. the Western rotors, not only advantages because of their good start behave, they also have the disadvantage of the bad Efficiency in high winds. In wind power engineering are therefore turbines with cone covers for small systems used to flow the airflow from the center to the edge To direct wings, which thereby compresses and therefore performs well becomes more capable. The air congestion at higher wind speeds and thus a reduction in performance should be largely avoided So far, some technical devices have been devised. In DE-OS 38 36 325 z. B. are several hollow on the turbine shroud Wing set, the air from the area of the turbine inner wing suck off. For this, the cone is at a distance in front of the Turbine set so that the air at a sudden pressure increase (gusts) to the middle. Could be a disadvantage with this arrangement the mixing of the boundary layer air and be behind the turbine blades, d. that is, the air to the middle the turbine evades, can go uncontrolled behind the turbine blades gelanten and thus interrupt the suction of the other suction side.
Es stellt sich die erfindungsgemäße Aufgabe, diese ungeregelten Luftströmungen zu vermeiden:The task according to the invention arises, these unregulated Avoid air currents:
Die Turbinenflügel werden peripher, Fig. 1 (3), und axial umwandelt. Dieser axiale Mantel wird mit dem Kegelmantel verbunden, Fig. 1 (2). Die von der Kegelspitze zur Kegelgrundfläche strömende Luftschicht wird dabei komprimiert und teilt sich im Bereich der Turbinenflügel, Fig. 1 (1). Der Teil, der in die Turbinenflügel strömt, legt einen längeren Weg zurück und bekommt deshalb eine höhere Geschwindigkeit, Fig. 1 (4), als die außen um die Turbine strömende Luftschicht, Fig. 1 (5), wo sich hinter der Turbine die zuvor geteilten Luftschichten vereinen und gemeinsam abströmen. Weil aber hinter der Turbine die Luft verdünnt ist und deshalb Wirbel entstehen könnten, muß zur Vermeidung dieser Gegenströmungen (hinter der Turbine in Richtung Kegelspitze) Luft zugeführt werden, in diesem Fall von der Kegelspitze aus, Fig. 1 (6). Einfach die Kegelspitze abzunehmen, wäre nicht zweckmäßig, denn diese wird für das "Aufdrehen" der Luft benötigt. Außerdem sind die Regelmöglichkeiten dieser Öffnung konstruktiv aufwendig. Die erfindungsmäßig beste Möglichkeit besteht in der Teilung des Kegels, Fig. 1 (7), mit dem Vorteil, daß diese Öffnung drehzahlabhängig mit Hilfe der Fliehkraft regelbar ist, wobei diese Konstruktion einfach auszuführen ist und zuverlässig funktioniert. Zu diesem Zweck wird die Kegelspitze beweglich auf der Horizontalachse gelagert, so daß sie sich darauf vor- und zurückschieben läßt, Fig. 2 (8). Gestänge halten die Kegel spitze fest und verhindern unwillkürliche Bewegungen: Haltearme, Fig. 2 (9), sind fest auf der Achse angebracht. (Die Zeichnung zeigt nur eine Anordnung. Zur Vermeidung der Unwucht sollten mindestens zwei Hebelanordnungen angebracht werden, wenn nicht ein Gegengewicht verwendet wird.) Die Fliehkraft richtet die Winkel-Hebelarme mehr oder weniger auf, Fig. 2 (10), und regelt die Größe der Öffnung zwischen Kegelspitze und Kegelstumpf, Fig. 2 (11). Federn (nicht gezeigt) regulieren die Bewegungen besonders bei geringer Drehzahl. Platz für den Einbau aller Konstruktionsteile ist in der Kegelspitze genügend vorhanden. Behindert wird dort auch der Luftstrom nicht, der sich auch nicht mit dem Luftstrom des Turbinen-Schachtes mischen kann, sondern nur hinter die Turbine gelangen kann, Fig. 1 (6). Da der Luft strom aus der Kegelspitze in Abhängigkeit der Drehzahl (die wiederum von der Windgeschwindigkeit abhängt), volumengeregelt ist, wird ein Sogabriß an der Saugseite der Turbinenflügel vermieden, so daß die erfindungsmäßige Aufgabe damit erfüllt ist.The turbine blades are peripheral, Fig. 1 ( 3 ), and axially converted. This axial jacket is connected to the cone jacket, Fig. 1 ( 2 ). The air layer flowing from the cone tip to the cone base is compressed and divides in the area of the turbine blades, Fig. 1 ( 1 ). The part that flows into the turbine blades travels a longer distance and therefore gets a higher speed, Fig. 1 ( 4 ), than the air layer flowing around the outside of the turbine, Fig. 1 ( 5 ), where behind the turbine there are the combine previously divided air layers and flow together. However, because the air behind the turbine is diluted and vortices could arise, air must be supplied to avoid these countercurrents (behind the turbine in the direction of the cone tip), in this case from the cone tip, Fig. 1 ( 6 ). Simply removing the tip of the cone would not be advisable, because it is needed to "open" the air. In addition, the control options of this opening are structurally complex. The best possibility according to the invention consists in the division of the cone, Fig. 1 ( 7 ), with the advantage that this opening can be regulated by the centrifugal force as a function of speed, this construction being simple to carry out and functioning reliably. For this purpose, the cone tip is movably mounted on the horizontal axis so that it can be pushed back and forth, Fig. 2 ( 8 ). Poles hold the cone at the tip and prevent involuntary movements: holding arms, Fig. 2 ( 9 ), are firmly attached to the axle. (The drawing shows only one arrangement. To avoid imbalance, at least two lever arrangements should be installed unless a counterweight is used.) The centrifugal force more or less straightens the angle lever arms, Fig. 2 ( 10 ), and regulates the size the opening between the tip of the cone and the truncated cone, Fig. 2 ( 11 ). Springs (not shown) regulate the movements especially at low speed. There is enough space for the installation of all construction parts in the cone tip. The air flow, which cannot mix with the air flow of the turbine shaft, but can only get behind the turbine, is also not obstructed there, FIG. 1 ( 6 ). Since the air flow from the tip of the cone is volume-controlled depending on the speed (which in turn depends on the wind speed), a suction break on the suction side of the turbine blades is avoided, so that the object of the invention is thus achieved.
Claims (1)
- 1. vor eine Turbine gesetzter Kegel auf etwa der Hälfte der Länge seiner Seitenfläche durchtrennt ist. Der vordere Kegelteil wird auf der Horizontalachse in einer Ebene beweglich vor und zurück in Richtung Kegelspitze-Kegel grundfläche (Fig. 2 (8)) angebracht und mit Gestänge und Hebelarmen mit diesem verbunden (Fig. 2 (9 und 10). Die Fliehkraft verändert drehzahlabhängig die Lage der Hebelarme und damit die Öffnung zwischen Kegelspitze und Kegelstumpf (Fig. 2 (11));
- 2. der Bereich zwischen Turbinenflügeln und Kegelstumpf so ausgestaltet ist, daß die in die Turbinenflügel (Fig. 1 (1)) strömende Luftschicht einen längeren Weg (Fig. 1 (4)) zurücklegt als die außen über den Turbinenmantel (Fig. 1 (5)) strömende Luft und deshalb eine höhere Geschwindigkeit erhält. Die für die Abflußenergie notwendige Luftmenge strömt drehzahlabhängig durch die fliehkraftgesteuerte Öffnung in der Kegelmitte (Fig. 1 (6)), ohne den Bereich der Tur binenflügel direkt zu berühren.
- 1. a cone placed in front of a turbine is severed to about half the length of its side surface. The front cone part is mounted on the horizontal axis in a plane movable back and forth in the direction of the cone tip-cone base ( Fig. 2 ( 8 )) and connected to it with rods and lever arms ( Fig. 2 ( 9 and 10 ). The centrifugal force changes depending on the speed, the position of the lever arms and thus the opening between the cone tip and the truncated cone ( Fig. 2 ( 11 ));
- 2. The area between the turbine blades and the truncated cone is designed such that the air layer flowing into the turbine blades ( Fig. 1 ( 1 )) covers a longer distance ( Fig. 1 ( 4 )) than the outside via the turbine jacket ( Fig. 1 ( 5 )) flowing air and therefore receives a higher speed. The amount of air required for the discharge energy flows depending on the speed through the centrifugal force-controlled opening in the center of the cone ( Fig. 1 ( 6 )) without directly touching the area of the turbine blades.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19529096A DE19529096C2 (en) | 1995-08-08 | 1995-08-08 | Wind turbine with boundary layer division |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19529096A DE19529096C2 (en) | 1995-08-08 | 1995-08-08 | Wind turbine with boundary layer division |
Publications (2)
Publication Number | Publication Date |
---|---|
DE19529096A1 true DE19529096A1 (en) | 1996-03-14 |
DE19529096C2 DE19529096C2 (en) | 1998-01-22 |
Family
ID=7768967
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19529096A Expired - Fee Related DE19529096C2 (en) | 1995-08-08 | 1995-08-08 | Wind turbine with boundary layer division |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19529096C2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2754858A1 (en) * | 1996-10-22 | 1998-04-24 | Martinet Pierre | Wind powered turbine |
WO1998017912A1 (en) * | 1996-10-22 | 1998-04-30 | Veken Germaine V D | Hooded wind power engine |
DE10016513A1 (en) * | 2000-04-03 | 2001-10-11 | Eugen Radtke | Centrifugal wind power wheel for optimized utilization of energy of wind, has direct or indirect utilization of centrifugal force for displacement/movement of solid/fluid materials and for change of center of gravity |
DE10105864A1 (en) * | 2001-02-06 | 2002-08-14 | Eugen Radtke | Centrifugal wind-powered energy plant has weight lifted via centrifugal force dropped for providing rotary torque which can support rotor rotation |
WO2004090346A1 (en) * | 2003-04-11 | 2004-10-21 | Karl Maurenbrecher | Method and apparatus for modifying the flow properties of a fluid medium in the vicinity of a propeller, fan, turbine or engine |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3836325A1 (en) * | 1988-09-16 | 1989-08-03 | Alfred Frohnert | Small conical wind power station having aerodynamic speed regulation and starting aid |
DE4014685A1 (en) * | 1988-09-16 | 1991-12-12 | Alfred Frohnert | Propeller wind power machine - has aerofoil blades with hinged flap on ŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸ leading edge |
-
1995
- 1995-08-08 DE DE19529096A patent/DE19529096C2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3836325A1 (en) * | 1988-09-16 | 1989-08-03 | Alfred Frohnert | Small conical wind power station having aerodynamic speed regulation and starting aid |
DE4014685A1 (en) * | 1988-09-16 | 1991-12-12 | Alfred Frohnert | Propeller wind power machine - has aerofoil blades with hinged flap on ŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸŸ leading edge |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2754858A1 (en) * | 1996-10-22 | 1998-04-24 | Martinet Pierre | Wind powered turbine |
WO1998017912A1 (en) * | 1996-10-22 | 1998-04-30 | Veken Germaine V D | Hooded wind power engine |
US6246126B1 (en) | 1996-10-22 | 2001-06-12 | Germaine Van Der Veken | Hooded wind power engine |
DE10016513A1 (en) * | 2000-04-03 | 2001-10-11 | Eugen Radtke | Centrifugal wind power wheel for optimized utilization of energy of wind, has direct or indirect utilization of centrifugal force for displacement/movement of solid/fluid materials and for change of center of gravity |
DE10105864A1 (en) * | 2001-02-06 | 2002-08-14 | Eugen Radtke | Centrifugal wind-powered energy plant has weight lifted via centrifugal force dropped for providing rotary torque which can support rotor rotation |
WO2004090346A1 (en) * | 2003-04-11 | 2004-10-21 | Karl Maurenbrecher | Method and apparatus for modifying the flow properties of a fluid medium in the vicinity of a propeller, fan, turbine or engine |
Also Published As
Publication number | Publication date |
---|---|
DE19529096C2 (en) | 1998-01-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OAV | Publication of unexamined application with consent of applicant | ||
8122 | Nonbinding interest in granting licences declared | ||
8110 | Request for examination paragraph 44 | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |