CN103133273B - A kind of thin airfoil type blade of large fan - Google Patents
A kind of thin airfoil type blade of large fan Download PDFInfo
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- CN103133273B CN103133273B CN201310100221.1A CN201310100221A CN103133273B CN 103133273 B CN103133273 B CN 103133273B CN 201310100221 A CN201310100221 A CN 201310100221A CN 103133273 B CN103133273 B CN 103133273B
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The present invention relates to a kind of thin airfoil type blade of large fan, the cross section external frame of its tip segment is divided into leading edge, trailing edge, suction surface molded line and pressure side molded line, the distance of leading edge and trailing edge is chord length, the end surface thickness of described trailing edge is the 0%-5% of chord length, and the radius of described leading edge is the 3%-4% of chord length; The maximum ga(u)ge of described cross section is the 20.5%-21.5% of chord length, and the distance of maximum ga(u)ge place and leading edge is the 30%-40% of chord length; The maximum camber of described cross section is the 2.0%-3.0% of chord length, and the distance of maximum camber place and leading edge is the 40%-60% of chord length.This aerofoil profile combination property is better than traditional DU, NACA aerofoil profile of identical relative thickness, not only increases wind energy utilization efficiency, and alleviates structure weight, reduce fatigue load, has become the important technical basis of development Large Efficient low cost wind energy conversion system.
Description
Technical field
The present invention relates to wind power generation field, particularly relate to a kind of thin airfoil type blade of large fan.
Background technique
Along with the energy and environmental problem become increasingly conspicuous, rich reserves, pollution-free and reproducible wind energy are subject to people's attention gradually.The core component of Wind turbines-----blade has the aerofoil section of different-thickness and torsional angle distribution, the aeroperformance of its aerofoil profile and the operational efficiency of complete machine and reliability closely related.Early stage wind energy conversion system when blade design it is preferred that both development comparative maturity, the good aviation aerofoil profile of lifting resistance characteristic, but facts have proved that the design of this kind of aerofoil profile is not well positioned to meet fan design and usage requirement, as for Stall Type wind energy conversion system, too high peak energy and peak load can be produced in stall zone, not only damage generator, and increased the weight of the load of blade, reduce the life-span of blade, simultaneously because wind energy conversion system works for a long time in the wild, by sand and dust, the effect such as raindrop blade surface roughness increases, Airfoil Aerodynamic Performance worsens rapidly the energy loss caused can reach 20%-30%.
The research work of current domestic Special Airfoil of Wind Turbine is at the early-stage, Some Domestic blade factory can only carry out imitative production to the external fan blade produced, in default of geometry and the pneumatic performance data of aerofoil profile, directly affects the autonomous Design level of Chinese large-sized wind energy conversion system.Therefore how to found that a kind of wind energy utilization efficiency is high, the new thin airfoil fan blade of lightweight construction, the task of top priority of China's wind energy conversion system development.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of thin airfoil type blade of large fan, makes the attenuating of its weight, the raising of fan comprehensive performance, thus overcomes the deficiency that existing structure weight is heavy, wind energy utilization is low.
For solving the problems of the technologies described above, the invention provides a kind of thin airfoil type blade of large fan, the cross section external frame of its tip segment is divided into leading edge, trailing edge, suction surface molded line and pressure side molded line, the distance of leading edge and trailing edge is chord length, the end surface thickness of described trailing edge is the 0%-5% of chord length, and the radius of described leading edge is the 3%-4% of chord length; The maximum ga(u)ge of described cross section is the 20.5%-21.5% of chord length, and the distance of maximum ga(u)ge place and leading edge is the 30%-40% of chord length; The maximum camber of described cross section is the 2.0%-3.0% of chord length, and the distance of maximum camber place and leading edge is the 40%-60% of chord length.
As a modification of the present invention, the present invention also realizes by following proposal:
A kind of thin airfoil type blade of large fan, wherein, described maximum ga(u)ge is 21% of chord length, the distance of maximum ga(u)ge place and leading edge is 34% of chord length, maximum camber is 2.42% of chord length, the distance of maximum camber place and leading edge is 53% of chord length, and leading-edge radius is 3.55% of chord length, and trailing edge end surface thickness is 0.
A thin airfoil type blade for large fan, wherein, described pressure side molded line and suction surface molded line are Bezier curve.
After adopting such design, the present invention at least has the following advantages:
1, the vane airfoil profile combination property that this programme provides is better than traditional DU, NACA aerofoil profile of identical relative thickness, and wherein relative thickness is that the aerofoil profile (called after UP21) of 21% is than traditional NACA63421 combination property improve 4.75%.
2, new aerofoil not only increases wind energy utilization efficiency, and alleviates structure weight, reduces fatigue load, has become the important technical basis of development Large Efficient low cost wind energy conversion system.
Accompanying drawing explanation
Above-mentioned is only the general introduction of technical solution of the present invention, and in order to better understand technological means of the present invention, below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Fig. 1 is the leaf tip cross-sectional structure schematic diagram of the thin airfoil type blade of a kind of large fan of the present invention.
Fig. 2 is the partial enlarged drawing of trailing edge in Fig. 1.
Fig. 3 is the cross section external frame plotted curve of the thin airfoil type blade of a kind of large fan of the present invention.
Fig. 4 is the thin airfoil type blade of a kind of large fan of the present invention and the lift coefficient comparison diagram of NACA63421.
Fig. 5 is the thin airfoil type blade of a kind of large fan of the present invention and the ratio of lift coefficient to drag coefficient comparison diagram of NACA63421.
Embodiment
With reference to Fig. 1, Fig. 2, the invention provides the vane airfoil profile (called after UP21) that relative thickness is 21%, the leaf tip cross section of the thin airfoil type blade of large fan provided by the present invention is made up of leading edge 1, trailing edge 2, suction surface molded line 3 and pressure side molded line 4, wherein leading edge 1 is circular arc, leading edge 1 is connected with suction surface molded line 3, pressure side molded line 4 respectively, the continual curvature at tie point place, suction surface molded line 3 end 11 and pressure side molded line 4 end 13 are connected to form trailing edge 2.
First, the title of each several part in Fig. 1 is defined as follows:
1, mean camber line 10: the incircle doing a series of suction surface molded line 3 and pressure side molded line 4 in aerofoil profile, the line of these incenters is called the mean camber line 10 of aerofoil profile.
2, chord length: the line of mean camber line 10 rear and front end point is called wing chord, the length of wing chord is called for short chord length.
3, camber C: the maximum normal distance between mean camber line 10 and wing chord is called the maximum camber of aerofoil profile, be called for short camber, it is called relative maximum camber with the ratio of chord length.
4, leading-edge radius: be called leading-edge radius by the apothem of the leading edge 1 of aerofoil profile, it is called relative leading-edge radius with the ratio of chord length.
5, maximum ga(u)ge D: inscribe diameter of a circle maximum in aerofoil profile incircle is called the maximum ga(u)ge of aerofoil profile, and it is called relative maximum ga(u)ge with the ratio of chord length.
6, maximum ga(u)ge position: be called maximum ga(u)ge position by leading edge point to the distance of maximum ga(u)ge along wing chord, itself and the ratio of chord length are called relative maximum ga(u)ge position.
7, maximum camber position: be called maximum camber position by leading edge point to the distance of maximum camber chordwise, it and the ratio of chord length are called relative maximum camber position.
8, trailing edge end face 12: the line segment that the end 11 of suction surface molded line 3 and end 13 line of pressure side molded line 4 are formed is trailing edge end face 12, and its thickness and the ratio of chord length become relative trailing edge end surface thickness.
With reference to shown in Fig. 3, what pressure side molded line 4 of the present invention and suction surface molded line 3 adopted is Bezier(shellfish is hereby) curve, the relative thickness of this programme design is that the geometric data of the aerofoil profile (UP21) of 21% is as follows:
The scope of UP21 each several part parameter value:
Through experimental verification repeatedly, most preferred embodiment data of the present invention are as follows:
The Design of Aerodynamic Configuration of large scale wind power machine blade can be carried out according to the geometry of above-mentioned aerofoil profile and pneumatic performance data.
The aerodynamic data comparison diagram of UP21 and NACA63421 aerofoil profile is shown in that the aeroperformance of UP21 is obviously better than traditional NACA aerofoil profile of stack pile as seen from the figure with reference to Fig. 4, Fig. 5.Large scale wind power machine thin airfoil type blade primary placements of the present invention is in close blade tip position, this position is the position that blade is mainly exerted oneself, the aerofoil profile of this position of large scale wind power machine blade needs high coefficient of lift combined, high lift-drag ratio, mild stalling characteristics, low roughness receptance, high reynolds number stability, this programme is by the performance to the mode comprehensive assessment aerofoil profile of above-mentioned index parameter weighting, obtain traditional DU, NACA aerofoil profile that combination property is better than identical relative thickness, the reynolds number range that aerofoil profile provided by the invention is run is at 3*10
6to 6*10
6.
The above; it is only preferred embodiment of the present invention; not do any pro forma restriction to the present invention, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in protection scope of the present invention.
Claims (2)
1. a thin airfoil type blade for large fan, the cross section external frame of its tip segment is divided into leading edge, trailing edge, suction surface molded line and pressure side molded line, and the distance of leading edge and trailing edge is chord length, it is characterized in that:
The end surface thickness of described trailing edge is 0, and the radius of described leading edge is 3.55% of chord length;
The maximum ga(u)ge of described cross section is 21% of chord length, and the distance of maximum ga(u)ge place and leading edge is 34% of chord length;
The maximum camber of described cross section is 2.42% of chord length, and the distance of maximum camber place and leading edge is 53% of chord length.
2. the thin airfoil type blade of a kind of large fan according to claim 1, is characterized in that:
Described pressure side molded line and suction surface molded line are Bezier curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310100221.1A CN103133273B (en) | 2013-03-26 | 2013-03-26 | A kind of thin airfoil type blade of large fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310100221.1A CN103133273B (en) | 2013-03-26 | 2013-03-26 | A kind of thin airfoil type blade of large fan |
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| Publication Number | Publication Date |
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| CN103133273A CN103133273A (en) | 2013-06-05 |
| CN103133273B true CN103133273B (en) | 2015-12-02 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401866B (en) * | 2016-08-22 | 2023-06-16 | 内蒙古工业大学 | Blade type wind turbine blade |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2876367Y (en) * | 2005-11-09 | 2007-03-07 | 申振华 | Large deflection wind force machine wing shape |
| NZ543574A (en) * | 2003-04-28 | 2009-02-28 | Aloys Wobben | Rotor blade of a wind energy facility |
| CN102400847A (en) * | 2011-11-29 | 2012-04-04 | 吉林大学 | Wind-driven generator blade wing section |
| CN203175770U (en) * | 2013-03-26 | 2013-09-04 | 国电联合动力技术有限公司 | Thin wing type blade of large-scale fan |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3935804B2 (en) * | 2002-08-26 | 2007-06-27 | 三菱重工業株式会社 | Wing and wind power generator provided with the same |
| KR101051575B1 (en) * | 2009-07-30 | 2011-07-22 | 주식회사 효성 | Tip airfoil on blade for 2 megawatt wind generator |
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2013
- 2013-03-26 CN CN201310100221.1A patent/CN103133273B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NZ543574A (en) * | 2003-04-28 | 2009-02-28 | Aloys Wobben | Rotor blade of a wind energy facility |
| CN2876367Y (en) * | 2005-11-09 | 2007-03-07 | 申振华 | Large deflection wind force machine wing shape |
| CN102400847A (en) * | 2011-11-29 | 2012-04-04 | 吉林大学 | Wind-driven generator blade wing section |
| CN203175770U (en) * | 2013-03-26 | 2013-09-04 | 国电联合动力技术有限公司 | Thin wing type blade of large-scale fan |
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| CN103133273A (en) | 2013-06-05 |
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Inventor after: Zhou Wenming Inventor after: Dai Haitao Inventor after: Liu Dan Inventor after: Li Meizhi Inventor before: Zhou Wenming Inventor before: Dai Haitao Inventor before: Liu Dan |
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