WO2015136560A1 - Bi-mode wing for power wing profile - Google Patents

Bi-mode wing for power wing profile Download PDF

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Publication number
WO2015136560A1
WO2015136560A1 PCT/IT2015/000021 IT2015000021W WO2015136560A1 WO 2015136560 A1 WO2015136560 A1 WO 2015136560A1 IT 2015000021 W IT2015000021 W IT 2015000021W WO 2015136560 A1 WO2015136560 A1 WO 2015136560A1
Authority
WO
WIPO (PCT)
Prior art keywords
wing
projection
mode
intermediate portion
profile
Prior art date
Application number
PCT/IT2015/000021
Other languages
French (fr)
Inventor
Massimo Ippolito
Original Assignee
Kite Gen Research S.R.L
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 Kite Gen Research S.R.L filed Critical Kite Gen Research S.R.L
Publication of WO2015136560A1 publication Critical patent/WO2015136560A1/en

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
    • F03D5/00—Other wind motors
    • 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
    • F03D5/00—Other wind motors
    • F03D5/06—Other wind motors the wind-engaging parts swinging to-and-fro and not rotating
    • 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
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/91—Mounting on supporting structures or systems on a stationary structure
    • F05B2240/917—Mounting on supporting structures or systems on a stationary structure attached to cables
    • 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
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/92—Mounting on supporting structures or systems on an airbourne structure
    • F05B2240/921—Mounting on supporting structures or systems on an airbourne structure kept aloft due to aerodynamic effects
    • 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
    • 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
    • Y02E10/728—Onshore wind turbines

Definitions

  • the present invention refers to a bi-mode wing for power wing profile.
  • the invention refers to a bi- mode wing belonging to systems for extracting energy from the wind through ultra- light wings, with high aerodynamic efficiency, subjected to strong wing loads, in tensional structure mode.
  • a bi-mode wing In order to suitably manage both the step of extracting energy from wind, and the recovery step, a bi-mode wing must be able to assume a power generating attitude and a sideslip attitude.
  • the wing With the sideslip attitude, the wing is recalled through a single constraint tether. In order to have enough stability, in this step, the arc shape of the flight in power generating attitude must be abandoned in favor of a racing configuration.
  • Such wing is anyway composed in order to allow a change of attitude passing from an arc shape decomposed from the aerodynamic loads corresponding to such power generating attitude, to a place shape corresponding to such sideslip attitude.
  • a bi-raode wing must structurally behave flexibly; to be able to assume such arc shape decomposed of the aerodynamic loads and rigidly to be able to keep such plane shape.
  • US7032864 discloses an aerodynamic wing comprising an attack edge, an outlet edge, an intermediate upper flexible portion and an elastically deformable element integrated in such intermediate upper flexible portion adapted to extend and contract such intermediate upper flexible portion in a direction which is substantially perpendicular to the length of such elastically deformable element according to the encountered forces, wherein such elastically deformable element and such intermediate upper flexible portion are configured for imparting a curvature to such intermediate upper flexible portion and wherein the longitudinal axis of such elastically deformable element is oriented substantially perpendicular to the force developed by such intermediate upper flexible portion, when there is an air flow having a direction substantially parallel to the axis of such elastically deformable element.
  • Object of the present invention is solving the above prior art problems by providing a bi-mode wing for power wing profile made in order to allow a change of attitude passing from a plane shape to a deformed arc shape.
  • a further object is providing a bi-mode wing made through materials in suitable shapes and batches to be able to change the structural stiffness depending on a desired structural behavior.
  • Another object of the present invention is providing a bi-mode wing which can be produced through planar dies without impairing the chance that the wing itself assumes an arc configuration during its flight.
  • Figure 1 shows a perspective view of a preferred embodiment of a bi-mode wing according to the present invention
  • Figure 2 shows a view of a wing profile of a preferred embodiment of a bi-mode wing according to the present invention
  • Figures 3 and 4 respectively show a perspective view and a plan view of a projection of an embodiment of a bi-mode wing according to the present invention
  • Figures 5 and 6 respectively show a local sectional view along line V-V and line VI-VI of Figure 4 ;
  • Figure 7 shows a local sectional view of a variation of a projection of an embodiment of a bi- mode wing according to the present invention.
  • a bi-mode wing 1 for power wing profile adapted to assume an arc configuration and a plane configuration and vice versa, is composed of at least one intermediate portion 11 connected to pairs of bridles (not shown) through two side edges 12.
  • a wing profile 2 belonging to such bi- mode wing 1 is composed of a rounded and tapered attack edge 21 and of an outlet edge 22, wherein the attack edge 21 is thicker than the outlet edge 22.
  • At least the intermediate portion 11 is equipped with one or more projections 3, shaped and operating as pence in a piece of clothing, which are elevated from such intermediate portion 11 along the cord line of such wing profile 2.
  • projection 3 preferably has a rounded and tapered attack edge 31 and a tapered outlet edge 32.
  • Each projection 3 is preferably made of thermoplastic or thermosetting resins in a fabric matrix resisting to stresses induced by the aerodynamic forces on the wing 1, once having reached the arc shaped in the power generating attitude .
  • Such resins are used to provide the necessary elastic stiffness to take back such wing 1 to its plane configuration in its sideslip attitude.
  • such projection 3 comprises at least one rib 33 adapted to further stiffen the projection 3 itself, such rib 33 being stretched along the direction of the cord line of such wing profile 2.
  • the projection 3 possibly reinforced by the rib 33, also allows keeping rigid the wing profile 2 of a section of intermediate portion 11.
  • the wing profile 2 can be kept rigid in sections of such intermediate portion 11 next to each projection 3, allowing such wing 1 to assume both its arc power configuration and its plane sideslip configuration.
  • Such bi-mode wing in its arc configuration associated with the power generating step, sees such projection 3 stretched on the surface of such intermediate portion 11, while, in the plane configuration associated with the recovery step in wind sideslip, sees such projection 3 contracted and lifted with respect to the surface of such intermediate portion 11.

Abstract

A bi-mode wing (1) of a power wing profile (2) is described, adapted to assume an arc configuration and a plane configuration and vice versa, such wing (I) being composed of at least one intermediate portion (11) connected to bridles through two side edges (12), such intermediate portion (11) being equipped with at least one projection (3) and in said arc configuration such projection (3) being stretched on a surface of such intermediate portion (II), while in such plane configuration such projection (3) is contracted and lifted with respect to the surface of the intermediate portion (11) ·

Description

BI-MODE WING FOR POWER WING PROFILE
The present invention refers to a bi-mode wing for power wing profile.
In particular, the invention refers to a bi- mode wing belonging to systems for extracting energy from the wind through ultra- light wings, with high aerodynamic efficiency, subjected to strong wing loads, in tensional structure mode.
In order to suitably manage both the step of extracting energy from wind, and the recovery step, a bi-mode wing must be able to assume a power generating attitude and a sideslip attitude.
With the sideslip attitude, the wing is recalled through a single constraint tether. In order to have enough stability, in this step, the arc shape of the flight in power generating attitude must be abandoned in favor of a racing configuration.
Such wing is anyway composed in order to allow a change of attitude passing from an arc shape decomposed from the aerodynamic loads corresponding to such power generating attitude, to a place shape corresponding to such sideslip attitude.
A bi-raode wing must structurally behave flexibly; to be able to assume such arc shape decomposed of the aerodynamic loads and rigidly to be able to keep such plane shape.
From the prior art, it is known to use wing profiles capable of changing their shape depending on the aerodynamic force intensity.
US7032864 discloses an aerodynamic wing comprising an attack edge, an outlet edge, an intermediate upper flexible portion and an elastically deformable element integrated in such intermediate upper flexible portion adapted to extend and contract such intermediate upper flexible portion in a direction which is substantially perpendicular to the length of such elastically deformable element according to the encountered forces, wherein such elastically deformable element and such intermediate upper flexible portion are configured for imparting a curvature to such intermediate upper flexible portion and wherein the longitudinal axis of such elastically deformable element is oriented substantially perpendicular to the force developed by such intermediate upper flexible portion, when there is an air flow having a direction substantially parallel to the axis of such elastically deformable element.
US7032864 however does not solve the problem of ensuring to keep a rigid shape of an aerodynamic profile along its own cord line. In fact, such elastically deformable element allows regulating the aerodynamic wing attitude by intervening only along a direction which is transverse to the air flow direction, without stiffening the wing along the cord line.
Moreover, given the particular geometric arrangement in three dimensions which the wings of the wing profiles must have to assume the various flight configurations, they have various building and productive difficulties, above all when they are wings made of composite materials, since they require the use of particularly complex and relatively costly dies.
Object of the present invention is solving the above prior art problems by providing a bi-mode wing for power wing profile made in order to allow a change of attitude passing from a plane shape to a deformed arc shape. A further object is providing a bi-mode wing made through materials in suitable shapes and batches to be able to change the structural stiffness depending on a desired structural behavior.
Another object of the present invention is providing a bi-mode wing which can be produced through planar dies without impairing the chance that the wing itself assumes an arc configuration during its flight.
The above and other objects and advantages of the invention, as will appear from the following description, are obtained with a bi-mode wing for power wing profile as claimed in claim 1. Preferred embodiments and non- trivial variations of the present invention are the subject matter of the dependent claims.
It is intended that the enclosed claims are an integral part of the present description.
It will be immediately obvious that numerous variations and modifications can be made to what is described (for example related to shape, sizes, arrangements, various colors and parts with equivalent functionality) without departing from the scope of the invention as appears from the enclosed claims.
The present invention will be better described by some preferred embodiments, provided as a non- limiting example, with reference to the enclosed drawings, in which:
Figure 1 shows a perspective view of a preferred embodiment of a bi-mode wing according to the present invention;
Figure 2 shows a view of a wing profile of a preferred embodiment of a bi-mode wing according to the present invention;
Figures 3 and 4 respectively show a perspective view and a plan view of a projection of an embodiment of a bi-mode wing according to the present invention;
Figures 5 and 6 respectively show a local sectional view along line V-V and line VI-VI of Figure 4 ; and
Figure 7 shows a local sectional view of a variation of a projection of an embodiment of a bi- mode wing according to the present invention.
With reference to Figure 1, it is possible to note that a bi-mode wing 1 for power wing profile, adapted to assume an arc configuration and a plane configuration and vice versa, is composed of at least one intermediate portion 11 connected to pairs of bridles (not shown) through two side edges 12.
With reference to Figure 2, it is possible to note that a wing profile 2 belonging to such bi- mode wing 1 is composed of a rounded and tapered attack edge 21 and of an outlet edge 22, wherein the attack edge 21 is thicker than the outlet edge 22.
With reference to Figures 3 to 6, it is possible to note that at least the intermediate portion 11 is equipped with one or more projections 3, shaped and operating as pence in a piece of clothing, which are elevated from such intermediate portion 11 along the cord line of such wing profile 2. Such projection 3 preferably has a rounded and tapered attack edge 31 and a tapered outlet edge 32.
Each projection 3 is preferably made of thermoplastic or thermosetting resins in a fabric matrix resisting to stresses induced by the aerodynamic forces on the wing 1, once having reached the arc shaped in the power generating attitude .
Such resins are used to provide the necessary elastic stiffness to take back such wing 1 to its plane configuration in its sideslip attitude.
With reference to Figure 7, it is possible to note that a variation of the present invention provides that such projection 3 comprises at least one rib 33 adapted to further stiffen the projection 3 itself, such rib 33 being stretched along the direction of the cord line of such wing profile 2.
The projection 3, possibly reinforced by the rib 33, also allows keeping rigid the wing profile 2 of a section of intermediate portion 11.
According to the number of projections 3 obtained along such intermediate portion 11, the wing profile 2 can be kept rigid in sections of such intermediate portion 11 next to each projection 3, allowing such wing 1 to assume both its arc power configuration and its plane sideslip configuration.
Such bi-mode wing 1, in its arc configuration associated with the power generating step, sees such projection 3 stretched on the surface of such intermediate portion 11, while, in the plane configuration associated with the recovery step in wind sideslip, sees such projection 3 contracted and lifted with respect to the surface of such intermediate portion 11.

Claims

1. Bi-mode wing (1) of a power wing profile (2) adapted to assume an arc configuration associated with a power generating step, and a plane configuration associated with a recovery step in wind sideslip, and vice versa, said wing (1) being composed of at least one intermediate portion (11) connected to bridles through two side edges (12) , characterized in that at least said intermediate portion (11) is equipped with at least one projection (3) , shaped and operating as a pence in a fabric, and in that in said arc configuration said projection (3) is stretched on a surface of said intermediate portion (11) , while in said plane configuration said projection (3) is contracted and lifted with respect to said surface of said intermediate portion (11) .
2. Bi-mode wing (1) according to the previous claim, characterized in that said projection (3) comprises at least one rib (33) stretched along the direction of the cord line of said wing profile (2) .
3. Bi-mode wing (1) according to claim 1 or 2, characterized in that said projection (3) is made of thermoplastic or thermosetting resins in a fabric matrix.
4. Bi-mode wing (1) according to the previous claim, characterized in that said projection (3) is adapted to keep rigid said wing profile (2) next to a section of said intermediate portion (11) .
PCT/IT2015/000021 2014-03-14 2015-02-02 Bi-mode wing for power wing profile WO2015136560A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO20140203 2014-03-14
ITTO2014A000203 2014-03-14

Publications (1)

Publication Number Publication Date
WO2015136560A1 true WO2015136560A1 (en) 2015-09-17

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ID=50819892

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2015/000021 WO2015136560A1 (en) 2014-03-14 2015-02-02 Bi-mode wing for power wing profile

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7032864B2 (en) 2002-12-09 2006-04-25 Tony Logosz Wing with inflatable struts
CN101240778A (en) * 2007-02-06 2008-08-13 李庆星 Kite power generation method
WO2011121557A2 (en) * 2010-03-31 2011-10-06 Kitenergy S.R.L. Actuating systems for controlling the flight of a power wing profile for conversion of wind energy into electrical or mechanical energy
DE102010052081A1 (en) * 2010-11-22 2012-05-24 Steffen Born Kite with wing profile variable during flight has secured profile alteration lines and balance lines provided at front half of canvas covering
WO2013142949A1 (en) * 2012-03-27 2013-10-03 Ocean Rodeo Sports Inc. In-flight kite deflation and control systems
WO2013147600A2 (en) * 2012-03-27 2013-10-03 E-Kite Holding B.V. Kite power system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7032864B2 (en) 2002-12-09 2006-04-25 Tony Logosz Wing with inflatable struts
CN101240778A (en) * 2007-02-06 2008-08-13 李庆星 Kite power generation method
WO2011121557A2 (en) * 2010-03-31 2011-10-06 Kitenergy S.R.L. Actuating systems for controlling the flight of a power wing profile for conversion of wind energy into electrical or mechanical energy
DE102010052081A1 (en) * 2010-11-22 2012-05-24 Steffen Born Kite with wing profile variable during flight has secured profile alteration lines and balance lines provided at front half of canvas covering
WO2013142949A1 (en) * 2012-03-27 2013-10-03 Ocean Rodeo Sports Inc. In-flight kite deflation and control systems
WO2013147600A2 (en) * 2012-03-27 2013-10-03 E-Kite Holding B.V. Kite power system

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