KR101440587B1 - 21% Airfoil of blade for windturbine - Google Patents

21% Airfoil of blade for windturbine Download PDF

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Publication number
KR101440587B1
KR101440587B1 KR1020130065212A KR20130065212A KR101440587B1 KR 101440587 B1 KR101440587 B1 KR 101440587B1 KR 1020130065212 A KR1020130065212 A KR 1020130065212A KR 20130065212 A KR20130065212 A KR 20130065212A KR 101440587 B1 KR101440587 B1 KR 101440587B1
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South Korea
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airfoil
blade
wind turbine
wind
coordinate value
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KR1020130065212A
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Korean (ko)
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양승운
김철완
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주식회사 휴먼컴퍼지트
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    • 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
    • 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
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • 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

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  • 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)

Abstract

The present invention relates to a blade airfoil of a wind turbine and, more specifically, to a blade airfoil of which the thickness ratio (t/c), which is the ratio of a maximum width (t) to a length of the chord (c) of an airfoil used at the tips of blades, is 21%. Accordingly, the performance of blades used for a wind turbine can be enhanced due to the high lift and drag ratio.

Description

풍력 발전기용 블레이드 21% 익형 {21% Airfoil of blade for windturbine}Airfoil of blade for wind turbine 21% airfoil {21% Airfoil of blade for windturbine}

본 발명은 풍력발전기용 블레이드 익형에 관한 것으로서, 블레이드의 끝단(tip) 부근에 사용되는 단면 익형에서 높은 양항비(양력과 항력의 비)를 갖도록 하여, 풍력발전기에 사용되어 블레이드의 출력 성능을 높일 수 있는 익형에 관한 것이다.[0001] The present invention relates to a blade airfoil for a wind turbine, and more particularly, it relates to a blade airfoil for a wind turbine, in which a cross-section airfoil used in the vicinity of a tip of a blade has a high positive- It is about the airfoil that can be.

바람의 힘을 이용하여 전기에너지를 발생시키는 풍력발전기는 산업의 발달과 인구 증가에 의한 석유, 석탄, 천연가스 등의 천연자원의 고갈에 따라 대체 에너지원으로 많은 연구가 진행되고 있다.Wind power generators that generate electric energy by using wind power are being studied as alternative energy sources due to depletion of natural resources such as petroleum, coal and natural gas due to development of industry and population increase.

풍력발전이란 공기 유동이 갖는 운동에너지를 기계적 에너지로 변환시킨 후 다시 전기에너지를 생산하는 기술로서, 자연에 존재하는 바람을 에너지원으로 이용하므로 비용이 들지 않으면서도 친환경적인 바, 점차 사용 범위가 증가하고 있다.Wind power generation is a technology to convert kinetic energy of air flow into mechanical energy and then to produce electric energy again. Since it uses natural wind as an energy source, it is eco-friendly without increasing cost. .

종래의 풍력발전기의 구조는 도 1에 도시한 바와 같이, 지면상에 세워지는 고층의 타워(1) 상단에 로터블레이드(3)를 회동 지지하는 나셀(2)을 회전 가능하도록 설치하고, 나셀(2) 내부에는 증속기, 발전기 및 제어장치(미도시)를 두어, 로터블레이드(3)의 회전력이 허브(4)를 거쳐 주축을 통해 발전기에 이르도록 구성된다.As shown in FIG. 1, a conventional wind turbine is constructed such that a nacelle 2 for rotatably supporting a rotor blade 3 is rotatably installed on an upper end of a tower 1 of a high- 2) is provided with a speed reducer, a generator and a control device (not shown) so that the rotational force of the rotor blade 3 is transmitted to the generator via the hub 4 via the main shaft.

한편, 공기 유동 후류에 해당하는 나셀(2)의 상단에는 풍향풍속계(5)가 배치된다.이는 바람의 속도에 따라 전체 시스템을 최적 제어하고 발전량을 모니터링 하기 위함인데, 풍향풍속계(5)에서 측정되는 풍향과 풍속에 기반하여 로터블레이드(3)의 피치 각도를 조절하고 나셀(2)의 방향을 유동방향 쪽으로 회전시켜 발전 효율을 극대화한다.On the other hand, a wind direction anemometer 5 is disposed at the upper end of the nacelle 2 corresponding to the air flow downstream of the nacelle 2. This is for monitoring the generation amount and controlling the entire system in accordance with the wind speed. The pitch angle of the rotor blades 3 is adjusted and the direction of the nacelle 2 is rotated toward the flow direction based on the wind direction and the wind speed to maximize the power generation efficiency.

한편, 로터블레이드(3)는 도 2에 도시한 바와 같이 복수의 에어포일(6,airfoil) 형상을 스팬 방향(길이 방향)을 따라 분포시켜 3차원 형상을 얻는다. 그리고 로터블레이드(3)의 익근(root, 3a) 쪽은 구조적인 강성을 위해 두꺼운 에어포일(6)을 사용하고 로터블레이드(3)의 팁(tip, 3b) 쪽에는 얇으면서 양항비(=양력계수/항력계수)가 우수한 에어포일(6)을 사용하는 것이 보통이다.On the other hand, as shown in Fig. 2, the rotor blade 3 obtains a three-dimensional shape by distributing a plurality of airfoils 6 in the span direction (longitudinal direction). The thicker airfoil 6 is used for the structural rigidity and the tips 3a and 3b of the rotor blades 3 are thin and have a positive It is usual to use an airfoil 6 excellent in coefficient / drag coefficient).

또한, 에어포일(6)은 도 3에 도시한 바와 같이 코드(65)를 따라 분포되는 윗면(63, upper surface) 및 아랫면(64, lower surface)이 합쳐져 이루어지며, 에어포일(6)의 앞부분을 앞전(61, leading edge)라 하고, 뒷부분을 뒷전(62, trailing edge)라 칭한다. 이때, 에어포일(6)의 최대두께(t) 및 코드 길이(c)는 에어포일(6)의 성능을 결정짓는 중요한 변수 중의 하나로 취급된다. 또한, 최대두께(66)는 코드길이로 나누어 두께비로 무차원화 하여 사용되는 것이 보통이다.The airfoil 6 is formed by joining an upper surface 63 and a lower surface 64 distributed along the cord 65 as shown in FIG. Is referred to as a leading edge 61 and a trailing edge is referred to as a trailing edge 62. [ At this time, the maximum thickness t and the cord length c of the airfoil 6 are treated as one of important parameters determining the performance of the airfoil 6. [ Further, the maximum thickness 66 is usually used by dividing the cord length by a thickness ratio and dimensionless.

이와 바와 같이 풍력발전기의 성능 및 효율은 로터블레이드(3)의 단면을 이루는 각 에어포일(6)의 형상에 따라 좌우되고, 적절한 에어포일(6)의 선택은 장기간 운전되는 풍력발전기에 있어서 매우 중요하다.As described above, the performance and efficiency of the wind turbine are dependent on the shape of each airfoil 6 forming the cross section of the rotor blade 3, and the selection of an appropriate airfoil 6 is very important for a wind turbine Do.

그러나, 현재 풍력발전기에 사용되는 대부분의 에어포일(6)은 항공기용으로 개발된 것들이 보통이다. 유체역학적으로 중요한 변수인 레이놀즈수(=밀도*코드 길이*풍속/공기의 점성 계수)로 예를 들어 보면, 항공기의 경우 운전 조건에서의 레이놀즈수가 6,000,000 정도인데 반하여, 풍력발전기의 경우에는 500,000~1,600,000 사이에 불과하여, 운전조건이 전혀 다른 분야의 에어포일(6)이 풍력발전기의 로터블레이드(3) 단면 형상으로 사용됨으로써 상당한 성능 저하를 감수해야만 했다. 또한, 로터블레이드(3)의 끝단(tip, 3b) 부근은 양항비를 높이기 위해 얇은 에어포일이 사용되므로 블레이드의 구조적인 강성이 저하되는 문제점이 있다.However, most of the airfoils 6 currently used in wind power generators are usually developed for aircraft. For example, the Reynolds number (= density * code length * wind velocity / air viscosity coefficient), which is an important hydrodynamically variable parameter, is about 500,000-1,600,000 for wind turbines And the airfoil 6 having a completely different operating condition is used as the cross-sectional shape of the rotor blade 3 of the wind power generator, so that a considerable performance deterioration has to be taken. In addition, since a thin airfoil is used in the vicinity of the tips (tip, 3b) of the rotor blade 3 to increase the load ratio, the structural rigidity of the blade is deteriorated.

더욱이, 풍력발전기의 로터블레이드(3)는 스팬이 10m 이상으로 대형이고, 외부 환경의 오염(먼지, 곤충의 시체, 습기, 결빙 등)에 지속적으로 노출되는 반면 청소는 용이하지 아니하여 오염에 따른 성능 저하가 예상됨에도 이러한 영향을 고려하지 않은 채 항공기용으로 개발된 에어포일(6)을 그대로 사용함으로써 더욱더 고효율 로터블레이드(3)는 기대할 수 없었다. 한국등록특허(10-1059784)인 "유전 알고리즘을 이용한 풍력발전기의 로터블레이드 에어포일 설계 방법 및 이에 따라 설계된 에어포일"이 있다.Furthermore, the rotor blade (3) of the wind turbine is large in span of 10 m or more and is continuously exposed to pollution of the external environment (dust, insect body, moisture, icing, etc.) Even though performance deterioration is expected, a more efficient rotor blade (3) could not be expected by using the airfoil (6) developed for aircraft without considering this effect. Korean Patent No. 10-1059784 entitled " Method of Designing Rotor Blade Airfoil of Wind Turbine Genetic Algorithm and Designed Airfoil ".

KR 10-1059784 B1 (2011.08.22.)KR 10-1059784 B1 (2011.08.22.)

본 발명은 상술한 바와 같은 문제점을 해결하기 위하여 안출된 것으로서, 본 발명의 목적은 블레이드의 끝단(tip) 부근에 사용되는 단면 익형에서 최대두께(t)와 코드길이(c)의 비율인 최대 두께비(t/c)를 21%로 형성함으로써 높은 양항비(양력과 항력의 비)를 갖도록 하여, 풍력발전기에 사용되는 블레이드의 출력 성능을 높일 수 있는 풍력발전기용 블레이드 익형을 제공하는 것이다.SUMMARY OF THE INVENTION It is an object of the present invention to provide an airfoil for use in a cross sectional airfoil which is used in the vicinity of a tip of a blade, (ratio of drag force to drag force) so that the output performance of the blades used in the wind turbine generator can be enhanced by forming the blade airfoil (t / c) at 21%.

상기한 바와 같은 목적을 달성하기 위한 본 발명의 풍력발전기용 블레이드 익형은, 풍력발전기용 블레이드 익형에 있어서, 상기 블레이드의 끝단(tip) 부근에 사용되는 익형(1000)이며, 상기 익형(1000)은 윗면(400)에서 아랫면(500)까지의 최대두께(t)와 앞전(100)과 뒷전(200)을 잇는 직선인 코드(300)의 코드길이(c)의 비율인 최대 두께비(t/c)가 21%인 것을 특징으로 한다.In order to accomplish the above object, the blade airfoil for a wind turbine of the present invention is an airfoil (1000) used in the vicinity of a tip of a blade in a blade airfoil for a wind turbine, A maximum thickness ratio t / c, which is a ratio of the maximum thickness t from the top surface 400 to the bottom surface 500 and the cord length c of the cord 300, which is a straight line connecting the front and rear trains 100 and 200, Is 21%.

또한, 상기 익형(1000)은 운전되는 레이놀즈수(Re# = 공기밀도*풍속*코드길이 / 공기점성계수)가 2,000,000 내지 3,000,000인 것을 특징으로 한다.The airfoil 1000 is characterized in that the number of Reynolds numbers to be operated (Re # = air density * wind speed * code length / air viscosity coefficient) is 2,000,000 to 3,000,000.

또한, 상기 윗면(400)과 아랫면(500)의 프로파일(profile)은, 상기 코드(300)를 따라 상기 앞전(100)에서 뒷전(200)으로의 거리에 해당하는 수평좌표값(x/c)과, 상기 코드(300)에서 윗면(400) 또는 아랫면(500)의 거리에 해당하는 수직좌표값(y/c)을 각각 갖는 것을 특징으로 한다.The profile of the upper surface 400 and the lower surface 500 may be a horizontal coordinate value x / c corresponding to the distance from the front edge 100 to the rear edge 200 along the code 300, And a vertical coordinate value (y / c) corresponding to the distance between the upper surface 400 and the lower surface 500 of the cord 300, respectively.

본 발명의 풍력발전기용 블레이드 익형은, 블레이드의 끝단(tip) 부근에 사The blade airfoil for a wind turbine of the present invention is characterized in that the blade airfoil

용되는 단면 익형에서 최대 두께비(t/c)를 21%로 형성함으로써 구조적인 강성을 유(T / c) is set to 21% in the cross section airfoil to be used.

지하면서 높은 양항비(양력과 항력의 비)를 갖도록 하여, 풍력발전기에 사용되는(Ratio of lift to drag), so that it can be used in wind turbines

블레이드의 출력 성능을 높일 수 있는 장점이 있다.This has the advantage of improving the output performance of the blade.

도 1은 종래의 풍력발전기를 나타낸 사시도.
도 2는 도 1의 익형을 나타낸 개념도.
도 3은 도 2의 익형을 나타낸 단면도.
도 4는 본 발명의 풍력발전기용 블레이드 익형을 나타낸 단면도이다.
도 5는 본 발명의 풍력발전기용 블레이드 익형의 형상(profile)을 나타낸 그래프.
도 6은 본 발명의 풍력발전기용 블레이드 익형의 풍동시험 장면 사진.
도 7 및 도 8은 본 발명의 풍력발전기용 블레이드 익형의 양력(Cl) 및 항력(Cdw)을 나타낸 그래프.1 is a perspective view showing a conventional wind power generator;
FIG. 2 is a conceptual view showing the airfoil of FIG. 1; FIG.
3 is a cross-sectional view showing the airfoil of FIG. 2;
4 is a cross-sectional view showing a blade airfoil for a wind power generator of the present invention.
5 is a graph showing the profile of a blade airfoil for a wind turbine of the present invention.
6 is a photograph of a wind tunnel test of a blade airfoil for a wind turbine of the present invention.
7 and 8 are graphs showing lift (Cl) and drag (Cdw) of the blade airfoil for a wind turbine of the present invention.

이하, 상기한 바와 같은 본 발명의 풍력발전기용 블레이드 익형을 첨부된 도면을 참고하여 상세하게 설명한다.Hereinafter, the blade airfoil for a wind turbine of the present invention as described above will be described in detail with reference to the accompanying drawings.

도 4는 본 발명의 풍력발전기용 블레이드 익형을 나타낸 단면도이며, 도 5는 본 발명에 따른 익형의 형상을 나타낸 그래프이다.FIG. 4 is a cross-sectional view showing a blade airfoil for a wind turbine according to the present invention, and FIG. 5 is a graph showing a shape of an airfoil according to the present invention.

우선, 본 발명의 풍력발전기용 블레이드 익형(1000)은 풍력발전기의 블레이드에 사용되는 익형에 관한 것으로, 블레이드의 끝단(tip) 부근에 사용되는 익형에 관한 것이며, 도시된 바와 같이 본 발명의 풍력발전기용 블레이드 익형(1000)은 유동되는 공기와 맞닿는 쪽에 앞전(100, leading edge)이 형성되고 이와 일정거리 이격되어 뒷전(200, trailing edge)이 형성된다. 그리고 앞전(100)과 뒷전(200) 사이의 상측과 하측에는 각각 윗면(400)과 아랫면(500)이 형성된다.First, the blade airfoil 1000 for a wind turbine of the present invention relates to an airfoil used in a blade of a wind turbine, and relates to an airfoil used in the vicinity of a tip of the blade. As shown in the figure, The blade airfoil 1000 is formed with a leading edge 100 and a trailing edge 200 spaced from the leading edge. The upper surface 400 and the lower surface 500 are formed on the upper side and the lower side between the front electrode 100 and the rear electrode 200, respectively.

여기에서 앞전(100)과 뒷전(200)을 잇는 가상의 직선이 코드(300)이고 앞전(100)과 뒷전(200) 사이의 거리가 코드길이(c)가 되며, 코드(300)에 수직한 방향으로 윗면(400)과 아랫면(500) 사이가 가장 먼 지점의 거리가 최대두께(t)가 된다.A virtual straight line connecting the front and rear trains 100 and 200 is a code 300 and a distance between the front and rear trains 100 and 200 is a code length c, The maximum distance t between the upper surface 400 and the lower surface 500 is the maximum thickness t.

이때, 본 발명의 풍력발전기용 블레이드 익형(1000)은 윗면(400)에서 아랫면(500)까지의 최대두께(t)와 앞전(100)과 뒷전(200)을 잇는 직선인 코드(300)의 코드길이(c)의 비율인 최대 두께비(t/c)가 21%로 이루어진다. 일반적인 연구 결과에 따르면 익형의 두께는 얇아질수록 성능이 향상되나, 너무 얇으면 블레이드의 내부 구조물의 제작 및 구조적인 강도에 문제점이 발생할 수 있어 두께비를 12% 이상으로 형성하는 것이 적절하다고 알려져 있다. 그리고 블레이드의 끝단(tip) 부근은 양항비를 높이기 위해 얇은 에어포일이 사용되므로 블레이드의 구조적인 강성이 저하되는 단점이 있다.The blade airfoil 1000 for a wind turbine of the present invention has a maximum thickness t from the upper surface 400 to the lower surface 500 and a code of a straight cord 300 connecting the leading edge 100 and the trailing edge 200. [ And the maximum thickness ratio (t / c) as a ratio of the length (c) is 21%. According to general research results, the thickness of the airfoil is improved as the thickness is thinned, but if it is too thin, the internal structure of the blade and the structural strength may be problematic. In addition, since a thin airfoil is used to raise the port ratio near the tip of the blade, the structural rigidity of the blade is deteriorated.

그리하여 상기와 같이 본 발명의 풍력발전기용 블레이드 익형(1000)은 블레이드의 끝단(tip) 부근에 사용되는 익형의 최대 두께비(t/c)를 21%로 형성함으로써, 구조적인 강성을 유지하면서 기존의 다른 익형에 비해 높은 양항비(양력/항력 양력계수/항력계수)를 갖도록 하여 풍력발전기에 사용되는 블레이드의 출력 성능 및 효율을 높일 수 있는 장점이 있다.As described above, since the maximum thickness ratio (t / c) of the airfoil used in the vicinity of the tip of the blade is set to 21%, the blade airfoil 1000 for a wind turbine of the present invention has a structure (Lift / drag coefficient / drag coefficient) as compared with other airfoils, thereby improving the output performance and efficiency of the blades used in the wind turbine generator.

그리고 본 발명의 풍력발전기용 블레이드 익형(1000)이 운전되는 조건 중에서 레이놀즈수가 있으며, 운전되는 레이놀즈수는 풍속에 따른 익형의 운전조건을 말한다. 이때, 상기 익형(1000)은 운전되는 레이놀즈수(Re# = 공기밀도*풍속*코드길이 / 공기점성계수)가 2,000,000 내지 3,000,000이다The Reynolds number in the condition that the blade airfoil 1000 for a wind turbine of the present invention is operated means the operating condition of the airfoil according to the wind speed. At this time, the airfoil 1000 has a Reynolds number (Re # = air density * wind speed * cord length / air viscosity coefficient) of 2,000,000 to 3,000,000

즉, 본 발명의 익형(1000)의 양력 및 항력 특성을 확인하기 위해 도 6과 같이 풍동시험을 수행하였고, 익형의 성능은 상기 레이놀즈수 범위 내에서 측정된 결과이며, 도 7 및 도 8과 같이 받음각(Alpha)에 따라 양력(Cl)과 항력(Cdw)이 측정되었다.In order to confirm lift and drag characteristics of the airfoil 1000 of the present invention, a wind tunnel test was performed as shown in FIG. 6, and the performance of the airfoil was measured within the Reynolds number range. As shown in FIGS. 7 and 8 Lifting (Cl) and drag (Cdw) were measured according to the angle of attack (Alpha).

여기에서 상기 받음각(Alpha)은 AoA(angle of attack)라고도 하며, 코드(300) 라인과 공기의 흐름(기류)의 방향이 이루는 각도이다. 그리고 도시된 바와 같이 받음각에 따라 익형의 양력과 항력이 달라지며, 운전되는 레이놀즈수에 따라 서도 달라짐을 알 수 있다Here, the angle of attack Alpha is also referred to as an angle of attack (AoA), and is an angle formed by the direction of the airflow (airflow) and the line of code 300. As can be seen, the lift and drag force of the airfoil vary depending on the angle of attack, and it can be seen that this depends on the number of Reynolds numbers being operated

또한, 본 발명의 풍력발전기용 블레이드 익형(1000)에서 상기 윗면(400)과 아랫면(500)의 프로파일(profile)은, 상기 코드(300)를 따라 상기 앞전(100)에서 뒷전(200)으로의 거리에 해당하는 수평좌표값(x/c)과, 상기 코드(300)에서 윗면(400) 또는 아랫면(500)의 거리에 해당하는 수직좌표값(y/c)을 각각 갖으며, 상기 수평좌표값(x/c) 및 수직좌표값(y/c)은 아래의 표에 해당된다. The profile of the upper surface 400 and the lower surface 500 of the blade airfoil 1000 for a wind turbine according to the present invention may be such that a profile of the front blade 100 and the trailing blade 200 (Y / c) corresponding to the distance between the upper surface 400 and the lower surface 500 in the code 300 and the horizontal coordinate value (x / c) corresponding to the distance, Values (x / c) and vertical coordinate values (y / c) correspond to the following table.

이때, 상기 프로파일은 윗면과 아랫면의 윤곽을 말하고, 도 5와 같이 상기코드(300)의 길이를 1.0이라고 할 때, 상기 코드(300)상의 임의의 수평좌표값(x/c) 에서 수직으로 상측에 위치하는 지점의 상대적인 거리인 수직좌표값(y/c)을 이은 곡선이 윗면(400)이 된다. 마찬가지로 상기 코드(300)상의 임의의 수평좌표값(x/c)에서 수직으로 하측에 위치하는 지점의 상대적인 거리인 수직좌표값(y/c)을 이은 곡선이 아랫면(500)이 된다. 그리고 상기 윗면(400)과 아랫면(500)의 각각의 좌표값은 아래의 표 1과 같다.As shown in FIG. 5, when the length of the code 300 is assumed to be 1.0, the profile is an outline of the upper surface and the lower surface. (Y / c), which is the relative distance of the point located in the upper surface 400, is a top surface 400. Similarly, the curve that is the vertical coordinate value (y / c), which is the relative distance of the vertically lower point on the arbitrary horizontal coordinate value (x / c) on the code 300, becomes the lower surface 500. The coordinate values of the upper surface 400 and the lower surface 500 are shown in Table 1 below.

윗면Top 아랫면Bottom x/cx / c y/cy / c x/cx / c y/cy / c 0.00000 0.00000 -0.00140 -0.00140 0.00000 0.00000 -0.00140 -0.00140 0.00002 0.00002 0.00089 0.00089 0.00012 0.00012 -0.00386 -0.00386 0.00017 0.00017 0.00304 0.00304 0.00035 0.00035 -0.00638 -0.00638 0.00041 0.00041 0.00519 0.00519 0.00069 0.00069 -0.00893 -0.00893 0.00078 0.00078 0.00738 0.00738 0.00116 0.00116 -0.01151 -0.01151 0.00127 0.00127 0.00960 0.00960 0.00181 0.00181 -0.01411 -0.01411 0.00188 0.00188 0.01182 0.01182 0.00261 0.00261 -0.01671 -0.01671 0.00260 0.00260 0.01407 0.01407 0.00358 0.00358 -0.01929 -0.01929 0.00343 0.00343 0.01635 0.01635 0.00471 0.00471 -0.02186 -0.02186 0.00438 0.00438 0.01864 0.01864 0.00600 0.00600 -0.02439 -0.02439 0.00545 0.00545 0.02096 0.02096 0.00743 0.00743 -0.02690 -0.02690 0.00664 0.00664 0.02331 0.02331 0.00903 0.00903 -0.02935 -0.02935 0.00796 0.00796 0.02567 0.02567 0.01078 0.01078 -0.03179 -0.03179 0.00942 0.00942 0.02806 0.02806 0.01267 0.01267 -0.03418 -0.03418 0.01100 0.01100 0.03048 0.03048 0.01471 0.01471 -0.03656 -0.03656 0.01273 0.01273 0.03292 0.03292 0.01688 0.01688 -0.03892 -0.03892 0.01460 0.01460 0.03540 0.03540 0.01921 0.01921 -0.04126 -0.04126 0.01663 0.01663 0.03791 0.03791 0.02170 0.02170 -0.04358 -0.04358 0.01881 0.01881 0.04045 0.04045 0.02434 0.02434 -0.04590 -0.04590 0.02115 0.02115 0.04304 0.04304 0.02716 0.02716 -0.04821 -0.04821 0.02368 0.02368 0.04567 0.04567 0.03016 0.03016 -0.05051 -0.05051 0.02639 0.02639 0.04835 0.04835 0.03335 0.03335 -0.05280 -0.05280 0.02930 0.02930 0.05107 0.05107 0.03675 0.03675 -0.05507 -0.05507 0.03241 0.03241 0.05385 0.05385 0.04038 0.04038 -0.05735 -0.05735 0.03576 0.03576 0.05669 0.05669 0.04425 0.04425 -0.05963 -0.05963 0.03935 0.03935 0.05958 0.05958 0.04838 0.04838 -0.06191 -0.06191 0.04320 0.04320 0.06253 0.06253 0.05280 0.05280 -0.06419 -0.06419 0.04733 0.04733 0.06555 0.06555 0.05754 0.05754 -0.06649 -0.06649 0.05177 0.05177 0.06862 0.06862 0.06261 0.06261 -0.06879 -0.06879 0.05653 0.05653 0.07176 0.07176 0.06807 0.06807 -0.07113 -0.07113 0.06164 0.06164 0.07495 0.07495 0.07393 0.07393 -0.07350 -0.07350 0.06712 0.06712 0.07820 0.07820 0.08024 0.08024 -0.07589 -0.07589 0.07301 0.07301 0.08151 0.08151 0.08704 0.08704 -0.07833 -0.07833 0.07933 0.07933 0.08486 0.08486 0.09437 0.09437 -0.08078 -0.08078 0.08611 0.08611 0.08825 0.08825 0.10226 0.10226 -0.08325 -0.08325 0.09337 0.09337 0.09166 0.09166 0.11075 0.11075 -0.08574 -0.08574 0.10113 0.10113 0.09510 0.09510 0.11987 0.11987 -0.08822 -0.08822 0.10940 0.10940 0.09855 0.09855 0.12962 0.12962 -0.09069 -0.09069 0.11820 0.11820 0.10200 0.10200 0.14001 0.14001 -0.09312 -0.09312 0.12752 0.12752 0.10542 0.10542 0.15102 0.15102 -0.09549 -0.09549 0.13734 0.13734 0.10881 0.10881 0.16262 0.16262 -0.09777 -0.09777 0.14764 0.14764 0.11213 0.11213 0.17476 0.17476 -0.09994 -0.09994 0.15839 0.15839 0.11535 0.11535 0.18739 0.18739 -0.10195 -0.10195 0.16954 0.16954 0.11846 0.11846 0.20046 0.20046 -0.10381 -0.10381 0.18106 0.18106 0.12142 0.12142 0.21388 0.21388 -0.10547 -0.10547 0.19289 0.19289 0.12421 0.12421 0.22762 0.22762 -0.10692 -0.10692 0.20499 0.20499 0.12681 0.12681 0.24161 0.24161 -0.10817 -0.10817 0.21732 0.21732 0.12920 0.12920 0.25581 0.25581 -0.10917 -0.10917 0.22982 0.22982 0.13136 0.13136 0.27018 0.27018 -0.10995 -0.10995 0.24249 0.24249 0.13328 0.13328 0.28468 0.28468 -0.11047 -0.11047 0.25530 0.25530 0.13497 0.13497 0.29930 0.29930 -0.11075 -0.11075 0.26822 0.26822 0.13640 0.13640 0.31401 0.31401 -0.11077 -0.11077 0.28122 0.28122 0.13758 0.13758 0.32879 0.32879 -0.11056 -0.11056 0.29432 0.29432 0.13846 0.13846 0.34364 0.34364 -0.11007 -0.11007 0.30754 0.30754 0.13907 0.13907 0.35854 0.35854 -0.10936 -0.10936 0.32086 0.32086 0.13940 0.13940 0.37349 0.37349 -0.10841 -0.10841 0.33430 0.33430 0.13945 0.13945 0.38846 0.38846 -0.10722 -0.10722 0.34789 0.34789 0.13921 0.13921 0.40346 0.40346 -0.10579 -0.10579 0.36162 0.36162 0.13871 0.13871 0.41846 0.41846 -0.10414 -0.10414 0.37552 0.37552 0.13793 0.13793 0.43348 0.43348 -0.10225 -0.10225 0.38961 0.38961 0.13690 0.13690 0.44852 0.44852 -0.10012 -0.10012 0.40389 0.40389 0.13561 0.13561 0.46359 0.46359 -0.09777 -0.09777 0.41838 0.41838 0.13409 0.13409 0.47868 0.47868 -0.09518 -0.09518 0.43304 0.43304 0.13235 0.13235 0.49381 0.49381 -0.09236 -0.09236 0.44790 0.44790 0.13038 0.13038 0.50902 0.50902 -0.08931 -0.08931 0.46294 0.46294 0.12822 0.12822 0.52430 0.52430 -0.08604 -0.08604 0.47812 0.47812 0.12587 0.12587 0.53964 0.53964 -0.08257 -0.08257 0.49346 0.49346 0.12331 0.12331 0.55506 0.55506 -0.07889 -0.07889 0.50897 0.50897 0.12058 0.12058 0.57057 0.57057 -0.07499 -0.07499 0.52462 0.52462 0.11768 0.11768 0.58622 0.58622 -0.07088 -0.07088 0.54041 0.54041 0.11463 0.11463 0.60200 0.60200 -0.06659 -0.06659 0.55632 0.55632 0.11143 0.11143 0.61791 0.61791 -0.06214 -0.06214 0.57233 0.57233 0.10809 0.10809 0.63394 0.63394 -0.05753 -0.05753 0.58844 0.58844 0.10463 0.10463 0.65009 0.65009 -0.05280 -0.05280 0.60465 0.60465 0.10105 0.10105 0.66631 0.66631 -0.04802 -0.04802 0.62094 0.62094 0.09736 0.09736 0.68249 0.68249 -0.04323 -0.04323 0.63732 0.63732 0.09357 0.09357 0.69851 0.69851 -0.03850 -0.03850 0.65378 0.65378 0.08968 0.08968 0.71430 0.71430 -0.03390 -0.03390 0.67031 0.67031 0.08573 0.08573 0.72980 0.72980 -0.02949 -0.02949 0.68690 0.68690 0.08170 0.08170 0.74502 0.74502 -0.02530 -0.02530 0.70354 0.70354 0.07761 0.07761 0.75994 0.75994 -0.02137 -0.02137 0.72023 0.72023 0.07347 0.07347 0.77459 0.77459 -0.01770 -0.01770 0.73696 0.73696 0.06930 0.06930 0.78898 0.78898 -0.01434 -0.01434 0.75369 0.75369 0.06511 0.06511 0.80312 0.80312 -0.01128 -0.01128 0.77040 0.77040 0.06091 0.06091 0.81707 0.81707 -0.00855 -0.00855 0.78710 0.78710 0.05668 0.05668 0.83084 0.83084 -0.00614 -0.00614 0.80378 0.80378 0.05245 0.05245 0.84446 0.84446 -0.00404 -0.00404 0.82041 0.82041 0.04824 0.04824 0.85793 0.85793 -0.00226 -0.00226 0.83697 0.83697 0.04403 0.04403 0.87126 0.87126 -0.00080 -0.00080 0.85343 0.85343 0.03986 0.03986 0.88446 0.88446 0.00034 0.00034 0.86970 0.86970 0.03575 0.03575 0.89751 0.89751 0.00117 0.00117 0.88572 0.88572 0.03171 0.03171 0.91040 0.91040 0.00169 0.00169 0.90141 0.90141 0.02777 0.02777 0.92313 0.92313 0.00191 0.00191 0.91663 0.91663 0.02394 0.02394 0.93564 0.93564 0.00186 0.00186 0.93131 0.93131 0.02025 0.02025 0.94791 0.94791 0.00157 0.00157 0.94535 0.94535 0.01672 0.01672 0.95984 0.95984 0.00103 0.00103 0.95864 0.95864 0.01337 0.01337 0.97141 0.97141 0.00029 0.00029 0.97110 0.97110 0.01022 0.01022 0.98255 0.98255 -0.00064 -0.00064 0.98267 0.98267 0.00725 0.00725 0.99320 0.99320 -0.00170 -0.00170 0.99335 0.99335 0.00447 0.00447 1.00000 1.00000 -0.00246 -0.00246 1.00000 1.00000 0.00264 0.00264

본 발명은 상기한 실시 예에 한정되지 아니하며, 적용범위가 다양함은 물론 이고, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 본 발명이 속하는 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형 실시가 가능한 것은 물론이다.
It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It goes without saying that various modifications can be made.

1000 : (본 발명의) 풍력발전기용 블레이드 익형
100 : 앞전 (leading edge)
200 : 뒷전 (trailing edge)
300 : 코드
400 : 윗면
500 : 아랫면
t : 최대두께
c : 코드길이1000: Blade airfoil for wind turbine (of the present invention)
100: Leading edge
200: trailing edge
300: Code
400: Top surface
500: underside
t: maximum thickness
c: Code length

Claims (3)

풍력발전기용 블레이드 익형에 있어서,
상기 블레이드의 끝단(tip) 부근에 사용되는 익형(1000)이며, 상기 익형(1000)은 윗면(400)에서 아랫면(500)까지의 최대두께(t)와 앞전(100)과 뒷전(200)을 잇는 직선인 코드(300)의 코드길이(c)의 비율인 최대 두께비(t/c)가 21%이고,
상기 윗면(400)과 아랫면(500)의 프로파일(profile)은,
상기 코드(300)를 따라 상기 앞전(100)에서 뒷전(200)으로의 거리에 해당하는 수평좌표값(x/c)과, 상기 코드(300)에서 윗면(400) 또는 아랫면(500)의 거리에 해당하는 수직좌표값(y/c)을 각각 갖으며, 상기 수평좌표값(x/c) 및 수직좌표 값(y/c)은 아래의 표 2에 해당하고,
상기 익형(1000)은 운전되는 레이놀즈수(Re# = 공기밀도*풍속*코드길이 / 공기점성계수)가 2,000,000 내지 3,000,000인,
것을 특징으로 하는 풍력발전기용 블레이드 익형.
윗면 아랫면 x/c y/c x/c y/c 0.00000 -0.00140 0.00000 -0.00140 0.00002 0.00089 0.00012 -0.00386 0.00017 0.00304 0.00035 -0.00638 0.00041 0.00519 0.00069 -0.00893 0.00078 0.00738 0.00116 -0.01151 0.00127 0.00960 0.00181 -0.01411 0.00188 0.01182 0.00261 -0.01671 0.00260 0.01407 0.00358 -0.01929 0.00343 0.01635 0.00471 -0.02186 0.00438 0.01864 0.00600 -0.02439 0.00545 0.02096 0.00743 -0.02690 0.00664 0.02331 0.00903 -0.02935 0.00796 0.02567 0.01078 -0.03179 0.00942 0.02806 0.01267 -0.03418 0.01100 0.03048 0.01471 -0.03656 0.01273 0.03292 0.01688 -0.03892 0.01460 0.03540 0.01921 -0.04126 0.01663 0.03791 0.02170 -0.04358 0.01881 0.04045 0.02434 -0.04590 0.02115 0.04304 0.02716 -0.04821 0.02368 0.04567 0.03016 -0.05051 0.02639 0.04835 0.03335 -0.05280 0.02930 0.05107 0.03675 -0.05507 0.03241 0.05385 0.04038 -0.05735 0.03576 0.05669 0.04425 -0.05963 0.03935 0.05958 0.04838 -0.06191 0.04320 0.06253 0.05280 -0.06419 0.04733 0.06555 0.05754 -0.06649 0.05177 0.06862 0.06261 -0.06879 0.05653 0.07176 0.06807 -0.07113 0.06164 0.07495 0.07393 -0.07350 0.06712 0.07820 0.08024 -0.07589 0.07301 0.08151 0.08704 -0.07833 0.07933 0.08486 0.09437 -0.08078 0.08611 0.08825 0.10226 -0.08325 0.09337 0.09166 0.11075 -0.08574 0.10113 0.09510 0.11987 -0.08822 0.10940 0.09855 0.12962 -0.09069 0.11820 0.10200 0.14001 -0.09312 0.12752 0.10542 0.15102 -0.09549 0.13734 0.10881 0.16262 -0.09777 0.14764 0.11213 0.17476 -0.09994 0.15839 0.11535 0.18739 -0.10195 0.16954 0.11846 0.20046 -0.10381 0.18106 0.12142 0.21388 -0.10547 0.19289 0.12421 0.22762 -0.10692 0.20499 0.12681 0.24161 -0.10817 0.21732 0.12920 0.25581 -0.10917 0.22982 0.13136 0.27018 -0.10995 0.24249 0.13328 0.28468 -0.11047 0.25530 0.13497 0.29930 -0.11075 0.26822 0.13640 0.31401 -0.11077 0.28122 0.13758 0.32879 -0.11056 0.29432 0.13846 0.34364 -0.11007 0.30754 0.13907 0.35854 -0.10936 0.32086 0.13940 0.37349 -0.10841 0.33430 0.13945 0.38846 -0.10722 0.34789 0.13921 0.40346 -0.10579 0.36162 0.13871 0.41846 -0.10414 0.37552 0.13793 0.43348 -0.10225 0.38961 0.13690 0.44852 -0.10012 0.40389 0.13561 0.46359 -0.09777 0.41838 0.13409 0.47868 -0.09518 0.43304 0.13235 0.49381 -0.09236 0.44790 0.13038 0.50902 -0.08931 0.46294 0.12822 0.52430 -0.08604 0.47812 0.12587 0.53964 -0.08257 0.49346 0.12331 0.55506 -0.07889 0.50897 0.12058 0.57057 -0.07499 0.52462 0.11768 0.58622 -0.07088 0.54041 0.11463 0.60200 -0.06659 0.55632 0.11143 0.61791 -0.06214 0.57233 0.10809 0.63394 -0.05753 0.58844 0.10463 0.65009 -0.05280 0.60465 0.10105 0.66631 -0.04802 0.62094 0.09736 0.68249 -0.04323 0.63732 0.09357 0.69851 -0.03850 0.65378 0.08968 0.71430 -0.03390 0.67031 0.08573 0.72980 -0.02949 0.68690 0.08170 0.74502 -0.02530 0.70354 0.07761 0.75994 -0.02137 0.72023 0.07347 0.77459 -0.01770 0.73696 0.06930 0.78898 -0.01434 0.75369 0.06511 0.80312 -0.01128 0.77040 0.06091 0.81707 -0.00855 0.78710 0.05668 0.83084 -0.00614 0.80378 0.05245 0.84446 -0.00404 0.82041 0.04824 0.85793 -0.00226 0.83697 0.04403 0.87126 -0.00080 0.85343 0.03986 0.88446 0.00034 0.86970 0.03575 0.89751 0.00117 0.88572 0.03171 0.91040 0.00169 0.90141 0.02777 0.92313 0.00191 0.91663 0.02394 0.93564 0.00186 0.93131 0.02025 0.94791 0.00157 0.94535 0.01672 0.95984 0.00103 0.95864 0.01337 0.97141 0.00029 0.97110 0.01022 0.98255 -0.00064 0.98267 0.00725 0.99320 -0.00170 0.99335 0.00447 1.00000 -0.00246 1.00000 0.00264

In a blade airfoil for a wind power generator,
The airfoil 1000 has a maximum thickness t from the top surface 400 to the bottom surface 500 and a maximum thickness t between the leading edge 100 and the trailing edge 200. [ The maximum thickness ratio t / c, which is the ratio of the cord length c of the cord 300 which is a straight line, is 21%
The profiles of the top surface 400 and the bottom surface 500 are,
A horizontal coordinate value x / c corresponding to a distance from the front edge 100 to the rear edge 200 along the code 300 and a horizontal coordinate value x / c corresponding to a distance between the top surface 400 and the bottom surface 500 (X / c) and the vertical coordinate value (y / c) correspond to Table 2 below, and the vertical coordinate value (y /
The airfoil 1000 has a Reynolds number (Re # = air density * wind speed * cord length / air viscosity coefficient) of 2,000,000 to 3,000,000,
Wherein the blade airfoil for a wind power generator is an airfoil.
Top Bottom x / c y / c x / c y / c 0.00000 -0.00140 0.00000 -0.00140 0.00002 0.00089 0.00012 -0.00386 0.00017 0.00304 0.00035 -0.00638 0.00041 0.00519 0.00069 -0.00893 0.00078 0.00738 0.00116 -0.01151 0.00127 0.00960 0.00181 -0.01411 0.00188 0.01182 0.00261 -0.01671 0.00260 0.01407 0.00358 -0.01929 0.00343 0.01635 0.00471 -0.02186 0.00438 0.01864 0.00600 -0.02439 0.00545 0.02096 0.00743 -0.02690 0.00664 0.02331 0.00903 -0.02935 0.00796 0.02567 0.01078 -0.03179 0.00942 0.02806 0.01267 -0.03418 0.01100 0.03048 0.01471 -0.03656 0.01273 0.03292 0.01688 -0.03892 0.01460 0.03540 0.01921 -0.04126 0.01663 0.03791 0.02170 -0.04358 0.01881 0.04045 0.02434 -0.04590 0.02115 0.04304 0.02716 -0.04821 0.02368 0.04567 0.03016 -0.05051 0.02639 0.04835 0.03335 -0.05280 0.02930 0.05107 0.03675 -0.05507 0.03241 0.05385 0.04038 -0.05735 0.03576 0.05669 0.04425 -0.05963 0.03935 0.05958 0.04838 -0.06191 0.04320 0.06253 0.05280 -0.06419 0.04733 0.06555 0.05754 -0.06649 0.05177 0.06862 0.06261 -0.06879 0.05653 0.07176 0.06807 -0.07113 0.06164 0.07495 0.07393 -0.07350 0.06712 0.07820 0.08024 -0.07589 0.07301 0.08151 0.08704 -0.07833 0.07933 0.08486 0.09437 -0.08078 0.08611 0.08825 0.10226 -0.08325 0.09337 0.09166 0.11075 -0.08574 0.10113 0.09510 0.11987 -0.08822 0.10940 0.09855 0.12962 -0.09069 0.11820 0.10200 0.14001 -0.09312 0.12752 0.10542 0.15102 -0.09549 0.13734 0.10881 0.16262 -0.09777 0.14764 0.11213 0.17476 -0.09994 0.15839 0.11535 0.18739 -0.10195 0.16954 0.11846 0.20046 -0.10381 0.18106 0.12142 0.21388 -0.10547 0.19289 0.12421 0.22762 -0.10692 0.20499 0.12681 0.24161 -0.10817 0.21732 0.12920 0.25581 -0.10917 0.22982 0.13136 0.27018 -0.10995 0.24249 0.13328 0.28468 -0.11047 0.25530 0.13497 0.29930 -0.11075 0.26822 0.13640 0.31401 -0.11077 0.28122 0.13758 0.32879 -0.11056 0.29432 0.13846 0.34364 -0.11007 0.30754 0.13907 0.35854 -0.10936 0.32086 0.13940 0.37349 -0.10841 0.33430 0.13945 0.38846 -0.10722 0.34789 0.13921 0.40346 -0.10579 0.36162 0.13871 0.41846 -0.10414 0.37552 0.13793 0.43348 -0.10225 0.38961 0.13690 0.44852 -0.10012 0.40389 0.13561 0.46359 -0.09777 0.41838 0.13409 0.47868 -0.09518 0.43304 0.13235 0.49381 -0.09236 0.44790 0.13038 0.50902 -0.08931 0.46294 0.12822 0.52430 -0.08604 0.47812 0.12587 0.53964 -0.08257 0.49346 0.12331 0.55506 -0.07889 0.50897 0.12058 0.57057 -0.07499 0.52462 0.11768 0.58622 -0.07088 0.54041 0.11463 0.60200 -0.06659 0.55632 0.11143 0.61791 -0.06214 0.57233 0.10809 0.63394 -0.05753 0.58844 0.10463 0.65009 -0.05280 0.60465 0.10105 0.66631 -0.04802 0.62094 0.09736 0.68249 -0.04323 0.63732 0.09357 0.69851 -0.03850 0.65378 0.08968 0.71430 -0.03390 0.67031 0.08573 0.72980 -0.02949 0.68690 0.08170 0.74502 -0.02530 0.70354 0.07761 0.75994 -0.02137 0.72023 0.07347 0.77459 -0.01770 0.73696 0.06930 0.78898 -0.01434 0.75369 0.06511 0.80312 -0.01128 0.77040 0.06091 0.81707 -0.00855 0.78710 0.05668 0.83084 -0.00614 0.80378 0.05245 0.84446 -0.00404 0.82041 0.04824 0.85793 -0.00226 0.83697 0.04403 0.87126 -0.00080 0.85343 0.03986 0.88446 0.00034 0.86970 0.03575 0.89751 0.00117 0.88572 0.03171 0.91040 0.00169 0.90141 0.02777 0.92313 0.00191 0.91663 0.02394 0.93564 0.00186 0.93131 0.02025 0.94791 0.00157 0.94535 0.01672 0.95984 0.00103 0.95864 0.01337 0.97141 0.00029 0.97110 0.01022 0.98255 -0.00064 0.98267 0.00725 0.99320 -0.00170 0.99335 0.00447 1.00000 -0.00246 1.00000 0.00264

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110012445A (en) * 2009-07-30 2011-02-09 주식회사 효성 Tip-irfoil of blade for wind power generator
KR20110092609A (en) * 2010-02-09 2011-08-18 서울대학교산학협력단 Low-noise tip airfoil geometry for urban small wind turbines in low wind speed condition
KR101216252B1 (en) 2012-04-13 2012-12-28 군산대학교산학협력단 Aerogenerator blade of tip airfoil

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110012445A (en) * 2009-07-30 2011-02-09 주식회사 효성 Tip-irfoil of blade for wind power generator
KR20110092609A (en) * 2010-02-09 2011-08-18 서울대학교산학협력단 Low-noise tip airfoil geometry for urban small wind turbines in low wind speed condition
KR101216252B1 (en) 2012-04-13 2012-12-28 군산대학교산학협력단 Aerogenerator blade of tip airfoil

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