WO2014098527A1 - Dispositif de réduction de la résistance de l'air pour essai de fatigue d'une pale et procédé pour son installation - Google Patents

Dispositif de réduction de la résistance de l'air pour essai de fatigue d'une pale et procédé pour son installation Download PDF

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Publication number
WO2014098527A1
WO2014098527A1 PCT/KR2013/011974 KR2013011974W WO2014098527A1 WO 2014098527 A1 WO2014098527 A1 WO 2014098527A1 KR 2013011974 W KR2013011974 W KR 2013011974W WO 2014098527 A1 WO2014098527 A1 WO 2014098527A1
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WO
WIPO (PCT)
Prior art keywords
air resistance
blade
resistance reduction
reduction device
reduction means
Prior art date
Application number
PCT/KR2013/011974
Other languages
English (en)
Korean (ko)
Inventor
이학구
박지상
윤순호
문진범
김진봉
김지훈
강민규
김홍관
이우경
박중규
Original Assignee
한국기계연구원 부설 재료연구소
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.)
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Publication date
Application filed by 한국기계연구원 부설 재료연구소 filed Critical 한국기계연구원 부설 재료연구소
Priority to CN201380063041.9A priority Critical patent/CN104854442A/zh
Publication of WO2014098527A1 publication Critical patent/WO2014098527A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0016—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings of aircraft wings or blades
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
    • 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
    • F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • 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
    • F05B2260/00—Function
    • F05B2260/83—Testing, e.g. methods, components or tools therefor

Definitions

  • the present invention relates to an air resistance reduction device for fatigue testing of a wind blade (Blade), and more particularly, fatigue of the blade provided to one side of the blade during the fatigue test to reduce the air resistance generated in the vertically acting blade
  • the present invention relates to a test air resistance reducing device and a method of installing the same.
  • the present invention is applicable to blades of various shapes and sizes, light and easy to install soybean resistance test device for fatigue testing of Bleo H and a method for installing the same.
  • Blades used in wind power generation cause changes in aerodynamic distribution around the blead during the cease-fire, which causes bending loads on the blast structure.
  • the ball residue test method is the most widely used because it can not only increase the required excitation amplitude, but also can achieve the required fatigue test within a short test time.
  • the blade travels a distance of about 16, 000 km during one million fatigue test cycles during the fatigue test, and reaches a maximum speed of 40 km / h at the blade tip. It becomes bigger. Therefore, there is a need for measures to overcome the problem of air resistance during fatigue tests.
  • a streamlined member covering the top surface of the blade 10.
  • a streamlined subsidiary system is integrally formed so as not to expose the leading edge 14a and trailing edge 14b of the blade 10 to the outside.
  • the upper end P and the lower end P2 of the streamlined member have a structure connected by a clip or a zipper.
  • the leading edge 14a and trailing edge 14b of the blade 10 have a structure in which a member and a streamlined member covering the blade 10 are fixed.
  • the prior art as described above has a problem in that it takes a lot of time and cost to install the air resistance reduction device because it uses a plurality of straps or a method of connecting a streamlined member using a clip or a zipper.
  • the air flow is introduced between the streamlined member near the edge (edge) of the blade with the highest gas velocity, the air resistance is increased, which causes the additional structure is easily damaged There is a problem.
  • the woodworking of the present invention is to solve the problems of the prior art as described above, and more specifically, having an air resistance reduction means on the outside of the blade, and having a support portion between the air resistance reduction means and the blade.
  • the air resistance reducing means By maintaining the air resistance reducing means in a constant shape, it is possible to reduce the air resistance generated in the vertically acting blade.
  • the present invention provides a device for reducing air resistance for fatigue testing of a blade.
  • Another object of the present invention is to provide an air resistance reduction device for fatigue testing of blades and an installation method using the same, which are applicable to blades of various shapes and sizes, to facilitate installation, and to improve durability.
  • the present invention and another object of the present invention is to provide an air resistance reduction device for a wave test of the blade and the installation method using the same to form a large number of humps on the outer surface of the air resistance reduction means to maximize the reduction effect.
  • the present invention provides a
  • Air resistance reduction means that has a cross-sectional shape of a closed loop (closed-loop) to accommodate the wind blade therein, and to maintain a state spaced apart from both sides of the wind blade to reduce the air resistance caused by fatigue test is provided by the 3 ⁇ 4 ⁇ ⁇ surface ⁇ fatigue of the blade is provided with the support portion to form a filling space therein for testing air resistance reducing device-containing, and the air resistance is reduced the number of stages of ⁇ ⁇ 7 T ⁇ 7T 7 if 3 ⁇ 4 stroke yo times .
  • the air resistance reduction means for reducing the air resistance generated during the fatigue test by receiving a wind blade inside the closed loop formed in the cross-sectional shape, while maintaining a state spaced apart from both sides of the wind blade, and the air Located in the resistance reducing means provides a blade air resistance reduction device for fatigue testing, characterized in that it comprises a support having a curved shape so that a part of the outer shape of the air resistance reduction means to form a curved surface.
  • An installation step of installing the air resistance reduction means on an outer surface of the wind blade, a pair of curved portions having a curved surface and spaced apart from both sides of the blade by filling a fluid including gas into the filling space, and the pair of curved surfaces Installation of an air resistance reduction device for fatigue testing of a blade consisting of a completion step of forming a flat portion having a plane between the portions. Provide a method.
  • the air resistance reducing means is formed in a closed loop cross-sectional shape to accommodate the wind blade therein and is kept spaced apart from both sides of the wind blade;
  • An air resistance reduction device for fatigue testing of a blade provides an air resistance generated in a blade that behaves vertically by providing a structure in which a wind blade is accommodated in an air resistance reduction means having a cross-sectional shape of a closed loop. In order to reduce the pressure and durability, the durability was improved.
  • the present invention provides a relatively simple device having an air resistance reducing means and a supporting portion for forming a filling space to fill gas therein, or a support portion having a curved shape to form a curved portion of the air resistance reducing means. It has a structure. Accordingly, it is easy to apply to blades of various shapes and sizes, there is an advantage that can significantly reduce the manufacturing and installation costs.
  • FIG. 1 is a state diagram showing a streamlined cover structure installed in the wind turbine blade according to the prior art
  • FIG. 2 is a front view schematically showing an air resistance reduction apparatus for fatigue testing of a blade according to the present invention
  • FIG. 3 is a perspective view showing a state of use according to the first embodiment of the air resistance reduction device for fatigue test of the blade according to the present invention
  • FIG. 4 is a longitudinal sectional view showing a state of use according to the second embodiment of the air resistance reduction device for fatigue test of the blade according to the present invention
  • Example 5 is a longitudinal cross-sectional view according to the example of Example 1 of the air resistance reduction device for fatigue test of a blade according to the present invention
  • FIG. 6 is a schematic view showing a coupling method of the blade according to the first embodiment of the air resistance reduction device for fatigue testing of the blade according to the present invention
  • 7 is a process flowchart showing the air resistance reduction device and the installation method for the fatigue test of the blade according to the present invention
  • 8 is a graph showing an experimental example using an air resistance reduction device for fatigue testing of a blade according to the present invention.
  • the air resistance reduction device for fatigue testing of a blade includes a closed loop cross-sectional shape to accommodate a wind blade therein, and to maintain a state spaced apart from both sides of the wind blade to generate a fatigue test. And an air resistance reducing means for reducing air resistance, wherein the malleable air resistance reducing means is characterized in that the support portion is formed to form a filling space therein so that a part of the outer shape of the air resistance reducing means has a curved surface.
  • the filling space of the support may be filled with a fluid containing gas.
  • the air drop reduction device for fatigue testing of the blade consisting of a cross-sectional shape of the closed loop accommodates the wind blades inside, while maintaining a state spaced apart from both sides of the wind blades during the fatigue test Air resistance reducing means for reducing air resistance generated; And a support part positioned inside the air resistance reducing means and having a curved shape so that a part of the outer shape of the air resistance reducing means forms a curved surface.
  • the support portion preferably has a width narrower than the width of the blade.
  • the support is preferably made of a foam material such as styrofoam.
  • the air resistance reduction means is spaced apart from both sides of the blade and has a curved surface. Is configured to include a pair of curved portions, and a flat portion having a plane between the pair of curved portions.
  • the outer surface of the air resistance reducing means may be formed with a plurality of grooves for lowering the air resistance.
  • one side of the support portion may be further provided with attachment means for maintaining a state attached to at least one of the blade and the air resistance reduction means.
  • the air resistance reduction device according to the present invention is formed with a height larger than the width.
  • the height is preferably greater than 1 to 5 times greater than the width.
  • the installation method of the air resistance reduction device for fatigue testing of a blade comprises air in a cross-sectional shape of a closed loop to accommodate a wind blade therein and having a support portion having a filling space therein.
  • a preparation step of preparing a resistance reduction means An installation step of installing the air resistance reduction means on an outer surface of the wind blade; And filling a fluid containing gas into the filling space to form a pair of curved portions spaced apart from both sides of the blade and having a curved surface, and a planar portion having a flat surface between the pair of curved portions.
  • the installation method of the air resistance reduction device for fatigue testing of the blade made of a cross-sectional shape of the closed loop to accommodate the wind blade therein and spaced apart from both sides of the blade
  • the completion step may be achieved by standing the support portion between the air resistance reduction means and the blade.
  • the installation step is that any one of the air resistance reduction means and the blade and the support portion is attached by the attachment means. desirable.
  • FIG. 2 is a front view schematically showing an air resistance reduction device for fatigue test of the blade according to the present invention.
  • the air resistance reduction device 100 for fatigue testing of a blade according to the present invention is fixed in contact with only the outside of the blade 10 at the outside of the blade 10 such that the blade 10 is fixed. This is to reduce the aerodynamic damping that occurs when resonating in the vertical direction.
  • the air resistance reduction apparatus 100 is formed to have a rounded outer surface in the upper and lower directions of the blade 10.
  • the air resistance reduction device 100 is formed to round the outer surface of the upper and lower in order to reduce the air resistance generated in the blade 10 resonating in the vertical direction.
  • the front and rear ends of the air resistance reduction device 100 are formed to surround the widthwise edges of the blade 10.
  • a weight 20 may be located at the right end of the air resistance reduction apparatus 100. Since the blade 10 has a general configuration that may be provided in various shapes, sizes, and positions, detailed description thereof will be omitted. do.
  • FIG 3 is a perspective view showing a state of use according to the first embodiment of the air resistance reduction device for fatigue test of the blade according to the present invention
  • Figure 4 is a second view of the air resistance reduction device for fatigue test of the blade according to the present invention It is a longitudinal cross-sectional view which shows the use condition according to the Example.
  • the air resistance reduction apparatus 100 is a closed loop. It has a cross-sectional shape to accommodate the wind blade 10 therein, and to maintain the state spaced apart from both sides of the wind blade (10) includes an air resistance reduction means 140 for reducing the air resistance generated during the fatigue test And, the air resistance reducing means 140 is provided with a support 120 that can be variously changed.
  • the air resistance reducing means 140 is a groove for reducing the air resistance on the outer surface
  • a large number 142 is formed.
  • the groove 142 uses the principle that the drag coefficient caused by air is reduced by about one third by changing the fluid around the golf ball into turbulence by the groove formed on the outer surface of the golf ball.
  • a plurality of grooves 142 are formed on the entire outer surface of the air resistance reduction means 140.
  • the air resistance reducing means 140 is configured to maintain a constant appearance in a state in which the expansion range is limited when inflated or unfolded by the support 120. Therefore, the air resistance reduction means 140 may be formed of various materials such as a polymer film, a rubber film, and a fiber film.
  • the air resistance reducing means 140 is located outside the support part 120 to limit the movement of the support part 120 from the blade 10, which is the part where air resistance actually occurs.
  • a curved portion 144 is formed at an upper portion and a lower portion thereof, and a flat portion 146 is provided between the curved portions 144.
  • the present invention is provided with an attachment means 124 on any one side of the air resistance reduction means 140, the blade 10 and the support portion 120.
  • the attachment means 124 is configured to restrain the blade 10, the air resistance reducing means 140, and the support 120 to maintain an integrated state when the blade 10 generates an amplitude in the vertical direction.
  • the attachment means 124 is a blade
  • the support 120 It is provided between the 10 and the support 120 to fix the blade 10 and the support 120 so as not to be spaced apart, the support 120 generates pressure in the outward direction to reduce the air resistance reduction means 140 It has a configuration that is integrated by expanding.
  • the attachment means 124 is provided between the blade 10 and the support 120 similar to Figure 3 and the blade 10 and The support 120 may be fixed so as not to be spaced apart, and the support 120 may be forced to maintain the upright state with respect to the blade 10.
  • the above-described attachment means 124 may be applied by adopting any one or more of velcro, tape, adhesive, and is attached separately to the contact portion of the support portion 120 and the air resistance reduction means 140.
  • the means may be further provided.
  • the support portion 120 is the air resistance reduction means 140 is curved portion
  • the flat portion 146 can be formed in various ways within a range that does not deform the shape by the air resistance.
  • the support part 120 is long in the left and right direction for weight reduction and has a tube shape in which left and right ends are shielded.
  • a support 120 may be configured to expand round to the top or bottom to form a curved surface in contact with the upper and lower surfaces of the blade 10, respectively.
  • the support 120 may be formed of various materials as long as the support 120 may selectively discharge and inflow of gas, and may have elasticity and leak of gas does not occur.
  • the support 120 may employ silicone rubber, butyl rubber, fiber bag, or the like.
  • the type of gas filled in the support 120 may be selected in various ways, preferably, a gas lighter than air, such as helium.
  • one side of the support portion 120 is provided with an injection hole 122 to enable the filling or exhaust of gas.
  • one injection hole 122 is provided for each support 120.
  • the support unit 120 serves to support the blade 10 when the air resistance is generated on the outer surface of the air resistance reduction means 140 due to the amplitude in the vertical direction.
  • the rounded shape of the actual air resistance reducing means 140 is determined by the surface in contact with the support 120. Therefore, the outer surface of the support portion 120 is rounded so that the air resistance can be reduced by contacting the inner surface of the air resistance reduction means 140.
  • the support 120 according to the first embodiment is formed to have a width narrower than the width of the blade (10). Accordingly, the side surface of the support 120 maintains a state spaced apart from the air resistance reducing means 140 as shown in FIGS. 3 and 5.
  • the overall height b determined by the height of the support part 120 is a width a length in order to reduce air resistance. It is preferable to form larger.
  • the height (b) is formed to be larger than the width (a) by more than 1 to 5 times.
  • the support 120 may be in the form of a structure having a predetermined shape and having a predetermined strength. At this time, the support portion 120 may be manufactured in a form filled inside by using a foam material such as styrofoam to reduce the weight.
  • the support portion 120 is formed so that the portion in contact with the blade 10 has a shape that is opposed to the outer surface of the blade 10, the portion in contact with the inner surface of the air resistance reduction means 140 is a curved portion ( It is preferable to be formed so as to have a valley to the 144.
  • the support 120 has a height comparable with the height of the flat portion 146.
  • the installation method of the air resistance reduction device for fatigue testing of a blade according to the present invention is made of a cross-sectional shape of a closed loop to accommodate a wind blade therein, and has a support having a layered space in which fluid can be filled .
  • Preparing step (S100) for preparing an air resistance reduction means 140 having a portion An installation step of installing the air magnetic path reducing means 140 on the outer surface of the wind blade 10 (S200); And a pair of curved portions 144 spaced apart from both sides of the blade 10 and having a curved surface by filling a fluid including a gas into the filling space of the support 120, and the pair of curved portions 144.
  • an installation step S200 as illustrated in FIG. 6 is performed.
  • the support 120 is spaced apart from the inside of the air resistance reduction means 140, and then the blade 10 is inserted between the pair of the support 120 (S200). At this time, between the air resistance reducing means 140 and the support portion 120 is provided with an attachment member 124 of the adhesive member or Velcro tape, so that the support portion 120 and the air resistance reduction means 140 are not separated from each other. You can limit it.
  • the air resistance reduction means is formed in a closed loop cross-sectional shape so as to accommodate the wind blade therein and is spaced apart from both surfaces of the blade 10.
  • a preparation step (S100) positioned in the air resistance reducing means 140 to prepare a support 120 having a curved shape such that a portion of the outer resistance of the air resistance reducing means 140 forms a curved surface;
  • Completion step (S300) to form a planar portion 146 having a plane between the portions 144.
  • the preparation step (S100) it may be provided with a support 120 of the structure form as shown in FIG.
  • the completion step (S300) is completed by lifting the support part 120 to stand up against the outer surface of the blade 10.
  • the completion step (S300) it may be limited to the movement by having the attachment means 124 in the portion where the blade 10 and the support portion 120 in contact.
  • Air resistance reduction device installed according to the first and second embodiments as described above
  • the overall height (b) is formed larger than the width (a) based on the longitudinal cross-sectional shape of the outer surface of the air resistance reduction means 140 as shown in FIG. According to this embodiment, it is preferable that the ratio of the width (b) to the height (b) is in the range of 1 to 5.
  • FIG. 8 is a graph showing an experimental example using an air resistance reduction device for fatigue test of a blade according to the present invention.
  • the experimental example of the graph of FIG. 8 compares the damping ratio and the oscillating amplitude of the blade with and without the air resistance reduction device according to the present invention.
  • the graph and the horizontal axis represent the distance from the blade's root, and the vertical axis represents the moment ratio (3 ⁇ 4) with respect to the target moment (Target moment).
  • the overall shape of the air resistance reduction device according to the present invention used in the present experimental example was carried out with the ratio of height to width of 1: 2 :.
  • test cycle required is 8X10 6 because the air resistance is large and the blade amplitude is small when the air resistance reducing device is not installed, and IX 10 6 when the air resistance reducing device is installed. It can be seen that the efficiency is eight times lower.
  • the air resistance reduction device has the effect of significantly reducing the air resistance, thereby significantly reducing the number of test cycles and the resulting test cost in the blade fatigue test.

Abstract

La présente invention concerne, selon un de ses modes de réalisation, un dispositif de réduction de la résistance de l'air destiné à un essai de fatigue d'une pale, comportant un moyen de réduction de la résistance de l'air qui présente une forme de section droite en boucle fermée de façon à y loger une pale d'éolienne, et qui maintient un état décollé de part et d'autre de la pale d'éolienne de façon à réduire la résistance de l'air générée pendant un essai de fatigue, l'intérieur du moyen de réduction de la résistance de l'air étant muni d'une partie de soutien servant à former un espace de remplissage de telle façon qu'une partie de l'extérieur du moyen de réduction de la résistance de l'air forme une surface courbe. Un procédé d'installation du dispositif de réduction de la résistance de l'air pour essai de fatigue d'une pale, selon un mode de réalisation de la présente invention, comporte: une étape de préparation consistant à préparer un moyen de réduction de la résistance de l'air qui présente une forme de section droite en boucle fermée et qui est muni d'une partie de soutien dotée d'un espace de remplissage qui est rempli d'un fluide comprenant du gaz; une étape d'installation consistant à installer le moyen de réduction de la résistance de l'air sur un côté extérieur d'une pale; et une étape d'achèvement consistant à former une paire de parties courbes qui présentent des surfaces courbes et qui sont séparées des deux côtés de la pale en remplissant l'espace de remplissage avec le fluide, et à former une partie de plan comprenant un plan entre la paire de parties courbes.
PCT/KR2013/011974 2012-12-20 2013-12-20 Dispositif de réduction de la résistance de l'air pour essai de fatigue d'une pale et procédé pour son installation WO2014098527A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201380063041.9A CN104854442A (zh) 2012-12-20 2013-12-20 用于叶片疲劳测试的空气阻力减小装置及其安装方法

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KR1020120149291A KR101401082B1 (ko) 2012-12-20 2012-12-20 블레이드의 피로시험용 공기 저항 저감장치 및 이의 설치 방법
KR10-2012-0149291 2012-12-20

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KR (1) KR101401082B1 (fr)
CN (1) CN104854442A (fr)
WO (1) WO2014098527A1 (fr)

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CN106596049A (zh) * 2017-01-23 2017-04-26 浙江工业大学 一种对非光滑水翼表面减阻效果测试的试验装置
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CN106840928B (zh) * 2017-04-19 2019-02-01 山东理工大学 风电叶片疲劳加载试验装置
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EP3795824A1 (fr) * 2019-09-18 2021-03-24 General Electric Company Système et procédé pour atténuer les vibrations de formation de vortex ou induites par décrochage sur une pale de rotor d'une éolienne pendant un arrêt

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