WO2012134044A1

WO2012134044A1 - Corrugated panel for wind power generator blade

Info

Publication number: WO2012134044A1
Application number: PCT/KR2012/000164
Authority: WO
Inventors: 김기현; 이정상; 오은정
Original assignee: 삼성중공업 주식회사
Priority date: 2011-03-31
Filing date: 2012-01-06
Publication date: 2012-10-04
Also published as: KR101225996B1; DK201370629A; US20140017088A1; KR20120111167A

Abstract

A corrugated panel for a wind power generator blade is disclosed. The present invention is coupled to one surface or the other surface of the wind power generator blade having an airfoil-shaped oblong cross section, the blade provided with a plurality of folds in the lengthwise direction, wherein the distance and height of each of the plurality of folds, at a predetermined position, can be values corresponding to a predetermined proportion of the airfoil-shaped oblong cross section of the blade at a predetermined position, when coupled to the blade.

Description

【Specification】

[Name of invention]

Corrugated Panel for Wind Turbine Blade

[Technical Field]

The present invention relates to a corrugated panel for a wind turbine blade, and more particularly, to a corrugated panel coupled to a wind turbine blade for improving aerodynamic performance of a wind turbine blade.

Background Art

<2> Wind power is a promising alternative energy source that can replace fossil fuels and is a clean energy source with little environmental pollution. Wind power generation is known to be the most economical alternative energy support by current technology. Therefore, the research and development of wind power generators is actively progressing, and the cases of installing wind power generators by selecting regions with abundant wind volume are increasing.

<3> In general, in a wind turbine, a plurality of blades are coupled to a hub to receive rotational force from a rotor that is rotated by wind force and a main shaft connected to the rotor. The generator is converted into electrical energy.

FIG. 1 illustrates a wind turbine of the horizontal axis type.

Referring to FIG. 1, the wind generator 100 may include a tower 110, a nussel 120, a hub 130, and a blade 140.

The above-described rotor may include a hub 130 and a plurality of blades 140 coupled to the hub 130. The hub 130 may be connected to each other by a generator (not shown) and a main shaft (not shown) installed in the nussel 120.

The lamp shaped tower 110 may be installed in the ground 1, and the nussel 120 may be supported by the tower 110. In this case, in general, the nussel 120 is a tower at the top of the tower 110

It is rotatably coupled around the longitudinal direction of the 110, it is possible to rotate the rotor in the wind blowing direction.

Therefore, when the wind is blowing in an area where the wind turbine 100 is installed, when the hub 130 is rotated to face the wind blowing direction, a force by the wind is applied to the blade 140. The hub 130 rotates, and the rotational force of the hub 130 is transmitted to a generator (not shown) through a main shaft (not shown) and converted into electrical energy.

At this time, in order to improve the power generation efficiency of the wind power generator 100, it is necessary to increase the efficiency of converting the force applied by the blades to the rotational force by the wind. follow

Alternative Site (Article 26) In order to ensure that the blade 140 has a shape capable of obtaining the highest efficiency in terms of aerodynamics, research and development on the shape of the blade 140 are continuously being performed.

FIG. 2 shows a cross section along the Π-Π straight line shown in FIG. 1.

Referring to FIG. 2, the blade 140 has a top ion side 141 and a bottom surface.

(pressure side, 142) may be included.

Here, the shape of the upper surface 141 and the lower surface 142 may be formed such that the cross section of the blade 140 has the shape of an airfoil, such as the wing of the aircraft, as described above, the blade ( 140) is to increase the efficiency of converting the force of the wind into rotational force.

<13> Indicated on the cross section of the blade 140 having the shape of the airfoil is the leading edge (143), trailing edge (144), cord (chord, 145), mean camber line (146) ) And code length (LC), which are well known to those skilled in the art and will not be described.

Referring back to FIG. 1, the power P produced by the wind turbine 100 is represented by the following equation.

It can be represented as 1.

<15> [Equation 1]

Where P is power, p is air density, V is wind speed, and C _P is power factor.

(coefficient of power), A represents the swept area of the blade (140).

Among these, the air density (p) and the wind speed (V) are different depending on the place where the wind turbine 100 is installed, but cannot be arbitrarily adjusted. Therefore, in order to increase the power P produced by the wind turbine 100, a method of increasing the rotational area A or increasing the power factor C _p may be considered.

In order to increase the rotational area A, the length of the blade 140 needs to be extended. As the length of the blade 140 increases, the cost and time required for the production of the blade 140 increase, and the blade An increase in the linear velocity of the tip portion of the tip 140 may cause a problem of an increase in the generation of noise and vibration. Therefore, there is a limit in extending the length of the blade 140.

Alternative Site (Article 26) Therefore, it is possible to increase the power P produced by the wind turbine 100 by causing the power factor C _p to become as high as possible from the design of the blade 140.

[Detailed Description of the Invention]

[Technical problem]

Embodiment of the present invention is to improve the aerodynamic characteristics of the wind turbine blade to improve the power generation efficiency of the wind turbine.

Technical Solution

According to an aspect of the present invention, coupled to one or the other surface of the wind turbine blade having a blade-shaped cross-section, a plurality of wrinkles are formed in the longitudinal direction of the blade, at a predetermined position of the plurality of wrinkles The spacing and height of the wind turbine blades can be provided, characterized in that when coupled to the blade has a value of each predetermined ratio compared to the cord length of the airfoil cross section of the blade at the predetermined position. .

Here, the corrugated panel for the wind turbine blade may be coupled to cover the entire width of one surface of the blade from one end to the other end of the blade.

In addition, the corrugated panel for the wind turbine blade may be made of a material including any one of titanium alloy, aluminum alloy and synthetic resin.

According to another aspect of the present invention, a panel body having one surface coupled to one surface or the other surface of a wind turbine blade having a blade cross section, and a plurality of wrinkles in the longitudinal direction of the blade on the other surface of the panel body. A plurality of pleats formed, wherein the spacing and height at predetermined positions of the plurality of pleats are predetermined compared to the cord length of the airfoil cross section of the blade at the predetermined position when the panel body is coupled to the blade. A corrugated panel for a wind turbine blade can be provided which has a value of a ratio.

Here, the panel body may be coupled to cover the entire width of one surface of the blade from one end to the other end of the blade.

In addition, the panel body and the corrugation part may be made of a material including any one of a titanium alloy, an aluminum alloy, and a synthetic resin.

In the corrugation panel for a wind turbine blade as described above, the corrugation may be formed such that the cross section thereof has any one of polygonal, semicircular, and elliptical increase, and in particular, the cross section thereof is formed to have a triangular shape. Can be.

Replacement Paper (Rule Article 26) And, the predetermined ratio may be 0.1 to 5 percent.

In addition, the panel body may include a connecting portion foldable at the position between the corrugation.

Advantageous Effects

According to the embodiment of the present invention, the power generation efficiency of the wind turbine can be improved by improving the aerodynamic characteristics of the blades that are already installed and used in the wind turbine as well as the newly manufactured wind turbine blades.

[Brief Description of Drawings]

1 is a diagram illustrating a general wind power generator.

FIG. 2 is a cross-sectional view taken along the line Π-Π of FIG. 1. FIG.

3 is a perspective view schematically illustrating a scene of coupling a corrugated panel for a wind turbine blade to a blade according to an embodiment of the present invention.

4 and 5 are graphs for explaining the difference in lift generation according to the shape of the airfoil.

FIG. 6 is a view showing an experimental result for explaining that a corrugated panel has an airfoil-like effect. FIG.

FIG. 7 is a cross-sectional view taken along line Vn-Vn of FIG. 3. FIG.

8 is a view showing a cross-sectional view of a corrugated panel for a wind turbine blade coupled to a blade according to an embodiment of the present invention.

9 is a cross-sectional view of the corrugated panel for a wind turbine blade according to another embodiment of the present invention. -Best Mode for Implementation of the Invention

As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and technical scope of the present invention. In the following description of the present invention, detailed descriptions of related well-known techniques will be omitted if it is determined that they may unnecessarily obscure the subject matter of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a corrugated panel for a wind turbine blade according to an embodiment of the present invention.

Alternative Site (Article 26) The scene coupled to the blade is shown schematically.

Referring to FIG. 3, the corrugated panel 200 for a wind turbine blade according to an embodiment of the present invention may be coupled to one surface of the blade 140, that is, the upper surface 141. Here, the power generator blade corrugated panel 200 according to an embodiment of the present invention may be coupled to the other surface of the blade 140, that is, the lower surface (see 142 of FIG. 7) as necessary.

As described above, the cross section of the blade 140 of the wind power generator (see 100 of FIG. 1) may have a airfoil shape. This will be described with reference to FIGS. 4 and 5.

4 and 5 illustrate graphs for explaining differences in lift generation according to airfoil shapes. It demonstrates with reference to FIG. 4 and FIG.

First, referring to FIG. 4, a graph comparing the shapes of the NACA 0012 airfoil and the NACA 4412 airfoil is illustrated. NACA means the American Aeronautical Advisory Board, the forerunner of the NASA.

NACA 0012 airfoils are symmetrical airfoils that have a symmetrical shape around a non-shown code, ie between 0 and 1 in the horizontal axis of the graph. The NACA 4412 airfoil is an asymraetrical airfoil, with an asymmetrical shape centered between 0 and 1 on the horizontal axis of the graph.

That is, although not shown, the NACA 0012 airfoil matches the average camber wire (see 146 in FIG. 2) with this code (see 145 in FIG. 2), and the NACA 4412 airfoil is the average camber wire (146 in FIG. 2). This may not be consistent with the code (see 145 of FIG. 2), but may be formed at a position in which the outline is biased, that is, at an upper side of the graph. In other words, the asymmetric airfoil NACA 4412 airfoil is formed with a camber.

Referring to FIG. 5, an experimental result graph showing a change in lift coefficient according to an angle of attack of a NACA 0012 airfoil and a NACA 4412 airfoil is illustrated. Here, the angle of attack refers to the angle formed by the cord (145 of FIG. 2) and the direction of the wind of the blade (140 of FIG. 1) having an airfoil cross section, which is well known to those skilled in the art, so a detailed description of the angle of attack is omitted. do.

As shown in the figure, NACA irrespective of change of angle of attack within a certain range.

It can be seen that the lift coefficient of NACA 4412 airfoil is always larger than that of 0012 airfoil. Accordingly, it can be seen that the lift force generated by the NACA 4412 airfoil with camber is larger than the NACA 0012 airfoil within a predetermined angle range.

Alternative Site (Article 26) For reference, the lift acting on the airfoil may be represented by Equation 2. [Equation 2]

Where L is the lift, p is the air density, V is the wind speed, C _L is the coefficient of lift, and A is the rotational area of the blade (140 in FIG. 1). Lift coefficient is an experimental value that is related to airfoil shape or angle of attack, so it can be measured directly or obtained from reference materials.

The blade of the wind generator (100 in FIG. 1) (140 in FIG. 1) has a cross section of the blade (140 in FIG. 1) in order to increase the efficiency of converting the force exerted by the wind into rotational force. It can be designed to have a shape that can take full advantage of the lifting force (L) applied to.

Indeed, the blades (140 in FIG. 1) of a typical horizontal axis wind turbine (100 in FIG. 1) are designed to have the shape of an asymmetric airfoil with cambers.

Here, the greater the lift applied to the blade 140 (FIG. 1), the greater the force in the direction of rotating the main axis (not shown) connected to the hub (130 of FIG. 1). Increasing the power to rotate the spindle (not shown) increases the power P produced by the wind turbine (100 in FIG. 1), and thus the power factor (which can be increased).

Therefore, as the airfoil cross-sectional shape of the blade (140 in FIG. 1) has a shape in which the lift coefficient C _L is increased, that is, a camber in the airfoil cross-section is increased, the power coefficient C _P is increased to increase the wind power generator (Fig. 1). The power generation efficiency of 100 of 1 may be improved.

6 shows experimental results for explaining that the corrugated panel has an airfoil-like effect.

Referring to FIG. 6, the corrugated panel 20 is shown when positioned in an air stream flowing in parallel with the X-axis direction. Here, the corrugated panel 20 is formed with a plurality of wrinkles (Ra, Rb, Rc, Rd, Re, Rf, Rg, Rh, Ri, Rj, Rk, Rl, hereinafter referred to as 'Ra to Rl'). Although not shown, assuming that the vertices of the plurality of wrinkles Ra to R1 are connected by virtual lines, the virtual lines have airfoils.

When the corrugated panel 20 is positioned in the air flow as described above, the portions relatively recessed by the plurality of corrugations Ra to R1 are included in the vortices Va, Vb, Vc, Vd, Ve, Vf, and Vg. , Vh, Vi, Vj, hereinafter, 'Va to Vj' are formed, respectively. Here, the vortices Va to Vj are continuously formed in the space between the plurality of wrinkles Ra to R1 as shown, and stable laminar flow LS is formed outside the plurality of wrinkles Ra to Ri. Is formed.

Therefore, the corrugated panel 20 has a cross-sectional shape different from the airfoil as shown, and functions like a airfoil, and according to the extent to which the plurality of corrugations Ra to R1 protrude, the camber ( It can be seen that the same effect as the camber is formed.

For reference, experimental results on the action of the corrugated panel 20 can be found in the AIM Journal 47 (December 12, 2009) published by the American Institute for Aeronautics and Astronautics (AIAA). ), "Flow Visualization Study of the Aerodunamics of Modeled Dragonfly ings (AIAA-2007-0483)" and the 47th AIM Aerospace Sciences Meeting Including The The detailed description will be omitted since it can be found in "An Experimental Investigation on Bio-inspired Corrugated Airf ioKAIAA 一 2009 一 1087" published in the New Horzons Forum and Aerospace Exposition.

At present, in the aerospace and shipbuilding fields, fine grooves or protrusions, ie dimples or riblets, are formed on the surface where the friction with the fluid occurs, thus delaying the separation of the fluid. This method is constantly being researched, developed and applied.

However, unlike the fine grooves or protrusions described above, the wrinkles Ra to R1 have a difference in size compared to the overall size of the corrugated panel 20. In addition, the wrinkles Ra to R1 described above are not intended to delay the peeling phenomenon, but also differ in that the corrugated panel 20 having a cross section different from the airfoil acts like an airfoil.

Thus, when the corrugated panel 20 is coupled to one surface (141 of FIG. 3) of the blade (140 of FIG. 3), as shown in FIG. 3, the camber of the airfoil cross section of the blade (140 of FIG. 3) is increased. An effect can be obtained, which will be described with reference to FIGS. 7 and 8.

FIG. 7 is a cross-sectional view taken along the line Vn-νΠ of FIG. 3, and FIG. 8 is a cross-sectional view of a corrugated panel for a wind turbine blade coupled to a blade according to an embodiment of the present invention. . It demonstrates with reference to FIG.

First, referring to FIG. 7, a blade 140 to which a wind turbine blade corrugation panel 200 is coupled to a wind turbine blade corrugation panel 200 according to an embodiment of the present invention.

Alternative Site (Article 26) A plurality of corrugations 202 may be formed in the longitudinal direction of.

When the corrugated panel 200 for the wind turbine blade is coupled to one surface of the blade 140, the corrugated panel 200 for the wind turbine blade has the other end from one end thereof in the longitudinal direction of the blade 140. That is, it can be combined to cover from the root portion of the blade 140 to the tip portion. However, if necessary, the blade 140 may be coupled to cover only a portion in the longitudinal direction.

In addition, when the corrugated panel 200 for the wind turbine blade is joined to one surface of the blade 140, the corrugated panel 200 for the wind turbine blade is moved from the leading edge 143 in the width direction of the blade 140. Covers up to trailing edge 144 and may be coupled. However, if necessary, the cover 140 may be coupled to cover only a part of the width 140.

A gap of the plurality of corrugations 202 formed in the corrugated panel 200 for the wind turbine blades

(P) and height (hr) are of a predetermined ratio with respect to the cord length (IX) of the airfoil cross section of the blade 140 at the predetermined position when the corrugated panel 200 for the wind turbine blade is coupled to the blade 140. It can be formed to have each value.

Here, the cord length IX of the airfoil cross section of the blade 140 may be continuously changed from one end to the other end along the longitudinal direction of the blade 140. Therefore, the interval p and the height hr of the plurality of wrinkles 202 may have a predetermined ratio of values with respect to the cord length IX, and according to a predetermined position along the longitudinal direction of the blade 140. The spacing p and height hr of the wrinkle 202 may be changed in proportion to the code length LC at the corresponding position.

On the other hand, the overall shape of the wind turbine blade corrugated panel 200 may be manufactured to have the same shape as the surface to which the wind turbine blade corrugated panel 200 is to be attached.

For example, as illustrated, the projected ends of the plurality of corrugations 202 protruding in the direction in which the corrugated panel 200 for the wind turbine blades are coupled to the upper surface 141 of the blade 140 are simulated. The lower outline LL connected to each other may be formed to have a shape of the upper surface 141 of the blade 140.

Also, although not shown, when the corrugated panel 200 for the wind turbine blade according to the embodiment of the present invention is coupled to the lower surface 142 of the blade 140, the lower outline LL is a blade. The lower surface 142 of the 140 may be formed to have a shape.

Referring to Figure 8, the wind turbine blade wrinkle panel 200 according to an embodiment of the present invention is coupled to the upper surface 141 of the blade 140.

At this time, the corrugated panel 200 for the wind turbine blade is attached to the blade 140 in the adhesive

Substitution place rule Article 26 It may be coupled by, or may be coupled using separate fastening members (not shown) such as bolts and nuts.

For reference, when a separate fastening member (not shown) is used, a through hole for coupling the fastening member (not shown) to the blade 140 and the corrugation panel 200 for the wind turbine blade may be formed. There is a force collected in the through-holes may reduce the rigidity of the blade 140 and the corrugated panel 200 for the wind turbine blade.

In addition, when the fastening member (not shown) protrudes from the surfaces of the blade 140 and the corrugated panel 200 for the wind turbine blade, noise may be generated due to resistance with air or the like.

Therefore, it may be advantageous to use an adhesive for bonding the corrugated panel 200 and the blade 140 for the wind turbine blade. At this time, since the blade 140 is installed and used outdoors, the adhesive used herein can be selected and used that can maintain sufficient strength while having high weather resistance and water resistance.

<S2> Upper contour line that virtually connects the protruding ends of the plurality of corrugations 202 protruding in a direction opposite to the direction in which the corrugated panel 200 for wind turbine blades is coupled to the upper surface 141 of the blade 140. UL may have a shape similar to the top surface 141 of the blade 140.

When the blade 140 to which the corrugated panel 200 for a wind turbine blade is attached according to an embodiment of the present invention is positioned in an airflow, the plurality of corrugations 202 have been described with reference to FIG. 6. Vortex may be formed as in the case of a corrugated panel (20 in FIG. 6). Therefore, the plurality of corrugations 202 may act as an additional camber corresponding to the shape of the upper outline UL on the upper surface 141 of the blade 140.

As mentioned above, the blade 140 of the wind turbine 100 has a shape to minimize the generation of noise and vibration at the same time to maximize the efficiency of converting the wind into the rotational power. The research and development of the shape of 140) is ongoing.

Therefore, in the case of the wind power generator 100 that is already installed and in use, the blade

The shape of the 140 may need to be supplemented. That is, the shape may not be applied even if there is room to further increase the camber of the blade 140.

In this case, by combining the corrugated panel 200 for the wind turbine blade according to an embodiment of the present invention to the blade 140, it is possible to supplement the performance of the blade 140.

On the other hand, while increasing the camber of the blade 140, a stall phenomenon occurs

Substitution place rule Article 26 Until the efficiency is sharply lowered, the lifting force of the blade 140 may increase as the camber is increased.

The extent to which the camber is increased by the wind turbine blade corrugation panel 200 according to the embodiment of the present invention is a distance between the plurality of corrugations 202 formed in the wind turbine blade corrugation panel 200 (p). ) And height (hr).

Therefore, in order to improve the performance of the blade 140, after measuring the shape of the blade 140, the difference with the shape of the optimized blade (not shown) designed to calculate the wind power according to the calculation result The spacing p and the height hr of the plurality of corrugations 202 to be formed in the corrugated panel 200 for the generator blade can be determined.

For reference, as a result of the experiment, the interval p of the plurality of corrugations 202 is defined as a blade at a predetermined position.

And may be selected within the range of 0.1 to 5 percent of the cord length IX of the airfoil cross section of 140. And, the height hr of the plurality of corrugations 202 may also be selected within the range of 0.1 to 5 percent of the cord length IX of the airfoil cross section of the blade 140.

And although not shown, the plurality of corrugations 202 formed in the corrugated panel 200 for wind turbine blades can be formed such that each cross section has a triangle as shown, but not shown The cross section may be formed to have one of polygonal, semicircular and elliptical shapes. The shape of the cross section of this corrugation 202 can be changed as needed.

In addition, the corrugated panel 200 for a wind turbine blade according to an embodiment of the present invention can be manufactured to have a light weight and sufficient strength.

That is, the corrugated panel for wind turbine blades 200 may be made of various materials such as titanium alloy, aluminum alloy and synthetic resin. For reference, titanium alloys have excellent corrosion resistance against seawater, which may be advantageous when applied to blades of wind turbines (not shown) installed at sea, and aluminum alloys and synthetic resins are lightweight and have high structural strengths. have.

As such, the corrugated panel for a wind turbine blade according to an embodiment of the present invention.

When the 200 is coupled to the blade 140, the efficiency of the blade 140 may be increased.

In addition, the plurality of corrugations 202 formed in the corrugated panel 200 for the wind turbine blades increase the stiffness of the blade 140 against the bending moment generated by the wind. It is also possible to reduce the occurrence of accidents such as the tip portion of the tower 110 and the stone stratification.

9 shows a corrugated panel for a wind turbine blade according to another embodiment of the present invention.

Substitution place rule Article 26 A cross section is shown.

Referring to FIG. 9, the panel body 310 may be included in the wrinkle panel 300 for a wind turbine blade according to another embodiment of the present invention, and a plurality of wrinkles may be formed on the other surface of the panel body 310. The formed wrinkled portion 320 may be formed.

Here, one surface of the panel body 310 is the upper surface of the blade (see 140 of FIG. 7) (see FIG. 7).

141) or a lower surface (see 142 of FIG. 7), and one surface of the panel body 310 may not have irregularities such as a plurality of wrinkles formed in the wrinkle part 320.

Therefore, one surface of the panel body 310 is the upper surface of the blade (see 140 of FIG. 7) (see FIG. 7).

141) or the lower surface (see 142 of FIG. 7) by using an adhesive, a secure contact area can be secured and firmly bonded.

The plurality of wrinkles formed in the wrinkle part 320 is a plurality of wrinkles (202) of the corrugation panel (200 in FIG. 7) for a wind turbine blade according to an embodiment of the present invention described with reference to FIGS. 7 and 8. In the longitudinal direction of the blade (see 140 in FIG. 7) to be coupled to one surface of the panel body 310, that is, the panel body 310 in the direction from the root portion of the blade (see 140 in FIG. 7) to the tip portion. It may be formed on the other side of the.

And, a plurality of wrinkles formed in the pleats 320, a plurality of corrugated panel for wind turbine blades (200 of FIG. 7) according to an embodiment of the present invention described with reference to Figures 7 and 8 The length of the cord of the airfoil cross section of the blade (see 140 in FIG. 7) at a predetermined position when one surface of the panel body 310 is coupled to the blade (see 140 in FIG. 7), as in the corrugation 202 of FIG. Relative to the LC reference).

In addition, the height and the spacing of the plurality of wrinkles formed in the pleats 320 may be as described above, and as a result of the experiment, the spacing of the plurality of wrinkles is the airfoil of the blade (see 140 of FIG. 7) at a predetermined position. It can be selected within the range of 0.1 to 5 percent of the cord length of the cross section (see IX in FIG. 7). Here, the height of the plurality of corrugations formed in the corrugations 320 may also be selected within the range of 0.1 to 5 percent of the cord length IX of the airfoil cross section of the blade (see 140 in FIG. 7).

A cross section of the plurality of wrinkles formed in the wrinkle part 320 may be formed to have a triangle as shown, and may be formed to have a shape of any one of a polygon, a semi-circle, and an ellipse although not shown. .

<i 04> Meanwhile, the coupling surface SSL indicated by the dotted line in the drawing is a surface on which one surface of the panel main body 310 is to be coupled, that is, an upper surface of the blade (see 140 in FIG. 7) (see 141 in FIG. 7) or a lower surface. (Of FIG. 7 142). That is, the panel body 310 may be manufactured to have flexibility so as to be deformed like the shape of the coupling surface SSL shown in the drawing.

In this case, the connecting portion connecting between the plurality of wrinkles formed in the wrinkle portion 320

If the 311 is manufactured to be smoothly folded, the panel body 310 can be easily coupled to the coupling surface SSL of various shapes.

The panel body 310 may be made of various materials such as titanium alloy, aluminum alloy, and synthetic resin. When the panel body 310 is made of a material having no flexibility, a hinge (not shown) may be installed at the connection part 311. You can also make it flexible.

As in the corrugated panel for the wind turbine blade (200 in FIG. 7) according to the embodiment of the present invention described above, the corrugated panel for wind turbine blades 300 according to another embodiment of the present invention is wind power It can be coupled to the blade of the generator (see 140 in Figure 7) to improve its efficiency.

As described above, embodiments of the present invention provide a blade of a wind turbine under construction.

In addition to (not shown), the power generation efficiency of the wind turbine (not shown) can be improved by improving the aerodynamic characteristics of the blade (not shown) that is already installed and in use in the wind turbine (not shown). .

Although described above with respect to the corrugated panel for a wind turbine blade according to an embodiment of the present invention, the spirit of the present invention is not limited to the embodiments presented herein, to understand the spirit of the present invention Those skilled in the art will be able to easily propose other embodiments by the addition, modification, deletion, addition, etc. of the elements within the scope of the same idea, but this also falls within the scope of the present invention.

Industrial Applicability

According to the embodiment of the present invention, as well as a newly manufactured wind turbine blade, the aerodynamic characteristics of the blade that is already installed and used in the wind turbine can be improved to improve the power generation efficiency of the wind turbine.

Replacement Paper Rule 26

Claims

[Range of request]

[Claim 1]

It is coupled to one or the other surface of the wind turbine blades having airfoil cross section, a plurality of corrugations are formed in the longitudinal direction of the blade,

The spaces and heights of the plurality of corrugations at predetermined positions each have a predetermined ratio of values compared to the cord length of the airfoil cross section of the blade at the predetermined positions when joined to the blade. Corrugated panel for generator blades.

[Claim 2]

The method of claim 1,

Covering the entire width of one side of the blade from one end to the other end of the blade corrugated panel for wind turbine blades, characterized in that coupled.

[Claim 3]

In that U term,

The blade corrugated panel is a corrugated panel for wind turbine blades, characterized in that made of a material comprising any one of titanium alloy, aluminum alloy and synthetic resin.

[Claim 4]

A panel body having one surface coupled to one surface or the other surface of the wind turbine blade having a blade cross section; And

The other surface of the panel body includes a wrinkle portion formed with a plurality of wrinkles in the longitudinal direction of the blade,

The spacing and height at predetermined positions of the plurality of corrugations have a predetermined ratio, respectively, compared to the cord length of the airfoil transverse cross section of the blade at the predetermined position when the panel body is coupled to the blade. Corrugated panel for wind generator blades

[Claim 5]

The corrugated panel according to claim 4, wherein the panel body is coupled to cover the entire width of one surface of the blade from one end to the other end of the blade.

[Claim 6] In accordance with claim U or 4,

The corrugation is a corrugated panel for a wind turbine blade, characterized in that the cross section is formed to have a shape of any one of polygonal, semi-circular and oval.

[Claim 7]

The method of claim 6,

The corrugation is a corrugated panel for a wind turbine blade, characterized in that the cross section is formed to have a triangular shape.

[Claim 8]

According to claim 1 or?

The predetermined ratio is a corrugated panel for wind turbine blades, characterized in that 0.1 to 5 percent.

[Claim 9]

The method of claim 4,

The panel body and the corrugated portion corrugated panel for a wind turbine blade, characterized in that made of a material comprising any one of titanium alloy, aluminum alloy and synthetic resin.

[Claim 10]

Is it about 4?

The panel body is

Corrugated panel for a wind turbine blade, characterized in that it comprises a foldable connection portion between the pleat position.