DE495518C - Wind turbine with two hollow blades, the inner edges of which reveal a central wind passage gap and overlap - Google Patents
Wind turbine with two hollow blades, the inner edges of which reveal a central wind passage gap and overlapInfo
- Publication number
- DE495518C DE495518C DEF63403D DEF0063403D DE495518C DE 495518 C DE495518 C DE 495518C DE F63403 D DEF63403 D DE F63403D DE F0063403 D DEF0063403 D DE F0063403D DE 495518 C DE495518 C DE 495518C
- Authority
- DE
- Germany
- Prior art keywords
- inner edges
- overlap
- wind turbine
- reveal
- passage gap
- 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.)
- Expired
Links
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation 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
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/06—Rotors
- F03D3/062—Rotors characterised by their construction elements
-
- 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
- F05B2240/21—Rotors for wind turbines
- F05B2240/211—Rotors for wind turbines with vertical axis
- F05B2240/213—Rotors for wind turbines with vertical axis of the Savonius type
-
- 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
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
Landscapes
- Engineering & Computer Science (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)
Description
Windrad mit zwei Hohlflügeln, deren Innenkanten einen zentralen Winddurchlaßspalt freigeben und sich übergreifen Die Erfindung geht von den bekannten Windrädern mit zwei Hohlflügeln aus, bei denen die Innenkanten der Flügel zwischen sich einen zentralen Winddurchlaßspalt frei lassen und die beiden Flügel sich mit ihren Innenkanten übergreifen, so daß sie - einen Strömungsweg von im wesentlichen konstanter Durchflußweite begrenzen.Wind turbine with two hollow blades, the inner edges of which have a central wind passage release and overlap The invention is based on the known wind turbines two hollow wings with the inner edges of the wings between them a central one Leave the wind passage gap free and the two wings overlap with their inner edges, so that they - limit a flow path of essentially constant flow width.
Eingehende Versuche bezüglich der Strömungsverhältnisse bei derartigen Windrädern haben nun gezeigt, daß sich besonders günstige Strömungsverhältnisse für solche Schaufelformen ergeben, bei denen gemäß der Erfindung die sich übergreifenden Innenkanten parallel verlaufen und sich tangential an zylindrisch oder kegelig gebogene Einlaufflächen, anschließen.In-depth experiments with regard to the flow conditions in such Wind turbines have now shown that there are particularly favorable flow conditions result for such blade shapes in which, according to the invention, the overlapping Inner edges run parallel and tangentially curved to cylindrical or conical Inlet surfaces, connect.
Bei einer derartigen Ausbildung der Schaufeln ist der aerodynamische Vorgang vergleichsweise so, daß, sobald das Windrad eine hohe Drehzahl erreicht hat, ein Durchfluß zwischen den Schaufeln nicht mehr erfolgt, vielmehr eine bestimmte Menge des strömenden Mediums in dem von den inneren Schaufelkanten begrenzten Raum der Schaufeln verbleibt und in diesem Raum pendelt. Diese Pendelung erfolgt nur mit geringen Energieverlusten, wenn die einander übergreifenden und parallel verlaufenden Innenkanten der Flügel sich tangential an zylindrisch oder kegelig gebogene Einlaufflächen anschließen. Das bei hohen Drehzahlen zwischen den Schaufelräumen pendelnde Quantum des Mediums kann dann störungsfrei den verschiedenen Kräften nachgeben, ohne daß, abgesehen von der Umkehr der Bewegung, Kompressionen oder Expansionen oder Ablenkungen während der Pendelbewegung auftreten, die Verluste zur Folge haben würden.With such a design of the blades, the aerodynamic Process comparatively so that as soon as the wind turbine reaches a high speed has, a flow between the blades no longer takes place, rather a certain one Amount of the flowing medium in the space delimited by the inner blade edges of the blades remains and commutes in this space. This oscillation only takes place with low energy losses if the overlapping and parallel ones Inner edges of the wings are tangential to cylindrical or conical curved inlet surfaces connect. The quantum oscillating between the blade chambers at high speeds of the medium can then yield to the various forces without interference, without apart from reversing movement, compressions or expansions, or distractions occur during the pendulum motion, which would result in losses.
Messungen haben beispielsweise ergeben, daß bei diesen Flügelformen gegenüber sonstigen Windrädern eine Wirkungsgraderhöhung bis zu i oo % erzielt werden konnte. Außerdem hat sich eine vorteilhafte Vergrößerung der Schnelläufigkeit des Windrades ergeben.Measurements have shown, for example, that with these wing shapes Compared to other wind turbines, an increase in efficiency of up to 100% can be achieved could. In addition, an advantageous increase in the speed of the Wind turbine surrender.
Die Zeichnung stellt ein Ausführungsbeispiel eines zweiflügeligen Windrades gemäß der Erfindung im Schnitt dar. Die Schnittlinien der beiden Schaufeln bestehen in ihrem äußeren Teil aus einem Kreisabschnitt. Der innere Teil ist eine Gerade, welche zu diesem Kreisabschnitt eine Tangente bildet. Die beiden Punkte c und b reichen vorzugsweise nicht bis an die Mittelliniea,d heran, sondern endigen vor ihr. Es ist zweckmäßig, den Zwischenraum zwischen den Kanten c und b und der Mittellinie a, d so zu wählen, daß er etwa i bis 5 % des Durchmessers ,a, d des Windrades beträgt. Es hat sich insbesondere als zweckentsprechend herausgestellt, diese Entfernung dann etwas größer zu wählen, wenn in dem Durchlauf zwischen den beiden Schaufeln sich ein Körper befindet (Welle o. dgl.), der den Durchlauf hemmt. Die Entfernungx, die die Strecke darstellt, um welche sich die beiden Geraden überlappen, wird zweckmäßig so ggwählt, daß sie etwa i/3 bis i/7 des Durchmessers ,a, d beträgt.The drawing shows an exemplary embodiment of a two-blade wind turbine according to the invention in section. The cutting lines of the two blades consist in their outer part of a segment of a circle. The inner part is a straight line which forms a tangent to this segment of the circle. The two points c and b preferably do not extend to the median line, d, but end in front of it. It is useful to choose the space between the edges c and b and the center line a, d so that it is about i to 5% of the diameter, a, d of the wind turbine. In particular, it has been found to be appropriate to select this distance somewhat larger if there is a body in the passage between the two blades (shaft or the like) which inhibits the passage. The distance x, which represents the distance by which the two straight lines overlap, is expediently chosen so that it is approximately 1/3 to 1/7 of the diameter, a, d.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF63403D DE495518C (en) | Wind turbine with two hollow blades, the inner edges of which reveal a central wind passage gap and overlap |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF63403D DE495518C (en) | Wind turbine with two hollow blades, the inner edges of which reveal a central wind passage gap and overlap |
Publications (1)
Publication Number | Publication Date |
---|---|
DE495518C true DE495518C (en) | 1930-04-14 |
Family
ID=7109758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEF63403D Expired DE495518C (en) | Wind turbine with two hollow blades, the inner edges of which reveal a central wind passage gap and overlap |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE495518C (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1981000435A1 (en) * | 1979-08-06 | 1981-02-19 | I Pommerening | Wind turbine having a shaft arranged perpendicularly with respect to the wind direction on a vertical axis,and flettner rotors parallel to the shaft |
DE202020000307U1 (en) | 2020-01-27 | 2020-03-31 | Dirk Petersen | Vertical wind turbine |
EP3677771A1 (en) | 2019-01-07 | 2020-07-08 | Dirk Petersen | Vertical wind turbine |
CN112912621A (en) * | 2018-11-15 | 2021-06-04 | 马克·丹尼尔·法伯 | Savonius wind turbine ratio |
DE202021003573U1 (en) | 2021-11-16 | 2023-02-17 | Andreas Mark Dreseler | Decentralized Vertical Wind Turbine |
-
0
- DE DEF63403D patent/DE495518C/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1981000435A1 (en) * | 1979-08-06 | 1981-02-19 | I Pommerening | Wind turbine having a shaft arranged perpendicularly with respect to the wind direction on a vertical axis,and flettner rotors parallel to the shaft |
CN112912621A (en) * | 2018-11-15 | 2021-06-04 | 马克·丹尼尔·法伯 | Savonius wind turbine ratio |
EP3677771A1 (en) | 2019-01-07 | 2020-07-08 | Dirk Petersen | Vertical wind turbine |
DE102019100208A1 (en) | 2019-01-07 | 2020-07-09 | Dirk Petersen | Vertical wind turbine |
DE202020000307U1 (en) | 2020-01-27 | 2020-03-31 | Dirk Petersen | Vertical wind turbine |
DE202021003573U1 (en) | 2021-11-16 | 2023-02-17 | Andreas Mark Dreseler | Decentralized Vertical Wind Turbine |
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