CN103883483B - A kind of 100W blade of wind-driven generator - Google Patents
A kind of 100W blade of wind-driven generator Download PDFInfo
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- CN103883483B CN103883483B CN201410153388.9A CN201410153388A CN103883483B CN 103883483 B CN103883483 B CN 103883483B CN 201410153388 A CN201410153388 A CN 201410153388A CN 103883483 B CN103883483 B CN 103883483B
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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
- 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
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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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a kind of 100W blade of wind-driven generator, blade of the present invention adopts sea-gull aerofoil profile, take from gull wings semispan, distance wing root 50% place, the maximum ga(u)ge (t) of sea-gull aerofoil profile is positioned at 20.63% of chord length (c), the maximum camber (f) of sea-gull aerofoil profile is positioned at 45.06% of chord length (c), when chord length (c) is for unit length 1, the maximum ga(u)ge (t) of sea-gull aerofoil profile is 0.1079, and the maximum camber (f) of sea-gull aerofoil profile is 0.1094.The imitative sea-gull airfoil fan of the present invention, is obtained according to design and installation angle structure by sea-gull aerofoil profile.The upper and lower surface velocity difference of sea-gull aerofoil profile is large, and pressure reduction is large, thus has greater lift.When reynolds' number is 100000, when the angle of attack is 0 ~ 20 °, the lift coefficient of sea-gull aerofoil profile and ratio of lift coefficient to drag coefficient are all higher than standard aerofoil profile, and maximum lift coefficient improves 1.196 times, and maximum lift-drag ratio improves 34.10%.Test shows, when wind speed is 0 ~ 10.7m/s, imitative sea-gull airfoil fan is compared with rule blade, and efficiency significantly improves, and average increase rate reaches 25.77%.
Description
Technical field
The present invention relates to a kind of 100W blade of wind-driven generator.
Technical background
Wind-power electricity generation is the emphasis of world new energy development, and small wind turbine market potential is huge.
At present, the operational efficiency of wind-driven generator, generally about 35%, compared with the limiting efficiency 59.3% of the ideally wind wheel calculated according to aerodynamic principle in nineteen twenty-six with Bates, also has very large room for promotion.Blade of wind-driven generator is the core component catching wind energy, directly decides the transformation efficiency of wind energy.And form the aerofoil profile of blade aeromechanical profile, directly decide the performance of blade, is the key improving blade efficiency.Therefore, the aerofoil profile obtaining excellent performance improves the key of wind power generator efficiency.
Be subject to the inspiration of numerous bionical product in recent years, the biological nature can using for reference occurring in nature is improved wind energy conversion system, consider that Bird Flight is the most similar to the operating mode that wind energy conversion system runs, the gull wings aerofoil profile that invention adopts reverse-engineering to obtain, blade of wind-driven generator is optimized, through contrasting with standard 100W blade of wind-driven generator, learn that blade of the present invention can effectively improve wind energy conversion system efficiency.
Summary of the invention
The object of this invention is to provide a kind of 100W blade of wind-driven generator, the present invention is directed to the phenomenon that existing small wind engine efficiency has much room for improvement, by adopting the mode of sea-gull aerofoil profile to improve blade of wind-driven generator, improving the wind energy utilization of wind-driven generator.
Blade of the present invention adopts sea-gull aerofoil profile, take from gull wings semispan, distance wing root 50% place, the maximum ga(u)ge (t) of sea-gull aerofoil profile is positioned at 20.63% of chord length (c), the maximum camber (f) of sea-gull aerofoil profile is positioned at 45.06% of chord length (c), when chord length (c) is for unit length 1, the maximum ga(u)ge (t) of sea-gull aerofoil profile is 0.1079, and the maximum camber (f) of sea-gull aerofoil profile is 0.1094.
Described sea-gull aerofoil profile is obtained by reverse-engineering, and the established angle structure that described blade is required according to table 2 by sea-gull aerofoil profile obtains.
Beneficial effect of the present invention:
The present invention is with standard 100W blade of wind-driven generator object as a comparison.The upper and lower surface velocity difference of described sea-gull aerofoil profile is large, and pressure reduction is large, thus has greater lift.When reynolds' number is 100000, when the angle of attack is 0 ~ 20 °, the lift coefficient of sea-gull aerofoil profile and ratio of lift coefficient to drag coefficient are all higher than standard aerofoil profile, and maximum lift coefficient improves 1.196 times, and maximum lift-drag ratio improves 34.10%.Test shows, when wind speed is 0 ~ 10.7m/s, imitative sea-gull airfoil fan is compared with rule blade, and efficiency significantly improves, and average increase rate reaches 25.77%.The present invention is by improving aerofoil profile, and improve Blade Properties, do not change traditional blades processing technology, applicability is wide.Wind tunnel test shows, imitative sea-gull aerofoil profile blade efficiency is apparently higher than rule blade.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of sea-gull aerofoil profile.
Fig. 2 is plan view of the present invention.
Fig. 3 is left view of the present invention.
Fig. 4 is plan view of the present invention.
Fig. 5 is structural representation of the present invention.
Fig. 6 is the A-A sectional drawing in Fig. 5.
Fig. 7 is that sea-gull aerofoil profile and standard aerofoil profile are 100000 at reynolds' number, the lift coefficient correlation curve figure when angle of attack is 0 ~ 20 °.
Fig. 8 is that sea-gull aerofoil profile and standard aerofoil profile are 100000 at reynolds' number, the ratio of lift coefficient to drag coefficient correlation curve figure when angle of attack is 0 ~ 20 °.
Fig. 9 be the imitative sea-gull airfoil fan of the present invention with rule blade when wind speed is 0 ~ 10.7m/s, power contrast's plotted curve that test obtains.
In figure: 1-sea-gull aerofoil profile, 2-imitates sea-gull airfoil fan, 3-blade root, 4-improvement part, t-maximum ga(u)ge, f-maximum camber, c-chord length, d-maximum camber line, E-top airfoil, F-lower aerofoil, the abscissa value of xt-maximum ga(u)ge position in aerofoil profile, the abscissa value of xf-maximum camber position in aerofoil profile.
Embodiment
Refer to shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, blade of the present invention adopts sea-gull aerofoil profile 1, take from gull wings semispan, distance wing root 50% place, the maximum ga(u)ge (t) of sea-gull aerofoil profile 1 is positioned at 20.63% of chord length (c), the maximum camber (f) of sea-gull aerofoil profile 1 is positioned at 45.06% of chord length (c), when chord length (c) is for unit length 1, the maximum ga(u)ge (t) of sea-gull aerofoil profile 1 is 0.1079, and the maximum camber (f) of sea-gull aerofoil profile 1 is 0.1094.The root of imitative sea-gull airfoil fan 2 has blade root 3, and imitative sea-gull airfoil fan 2 has improvement part 4.Sea-gull aerofoil profile 1 increases the current difference of aerofoil profile upper and lower surface, and pressure reduction is increased, and lift increases.Described sea-gull aerofoil profile 1 is obtained by reverse-engineering, described imitative sea-gull airfoil fan 2, and the parameter structure required according to table 2 by sea-gull aerofoil profile 1 obtains.In table 2, the angle between the plane of rotation (xy face) of the chord length (c) that established angle (θ) is sea-gull aerofoil profile 1 and imitative sea-gull airfoil fan 2.
Coordinate value corresponding to the upper and lower aerofoil of sea-gull aerofoil profile meets table 1:
Table 1
When being applied to 100W wind-driven generator, the chord length (c) that sea-gull aerofoil profile 1 is opened up to position in imitative sea-gull airfoil fan 2 difference meets table 2 with established angle (θ):
Table 2
Exhibition is to position (mm) | Chord length c(mm) | Established angle θ (°) |
0-50 | Blade root | 0 3 --> |
50 | 44 | 17.20 |
100 | 100 | 18.20 |
150 | 100 | 17.45 |
200 | 77 | 12.9157 |
250 | 56 | 9.9242 |
300 | 49 | 7.8272 |
350 | 45 | 6.2843 |
400 | 41 | 5.1049 |
450 | 37 | 4.1759 |
500 | 33 | 3.4259 |
550 | 29 | 2.8082 |
Figure 7 shows that sea-gull aerofoil profile 1 and standard aerofoil profile are 100000 at reynolds' number, the lift coefficient correlation curve figure when angle of attack is 0 ~ 20 °.As seen from the figure, under this kind of operating mode, sea-gull aerofoil profile 1 lift coefficient is higher than standard aerofoil profile, and maximum lift coefficient improves 1.196 times.
Figure 8 shows that sea-gull aerofoil profile 1 and standard aerofoil profile are 100000 at reynolds' number, the ratio of lift coefficient to drag coefficient correlation curve figure when angle of attack is 0 ~ 20 °.As seen from the figure, under this kind of operating mode, the ratio of lift coefficient to drag coefficient of sea-gull aerofoil profile 1 is higher than standard aerofoil profile, and maximum lift-drag ratio improves 34.10%.
Figure 9 shows that the imitative sea-gull airfoil fan 2 of the present invention with rule blade when wind speed is 0 ~ 10.7m/s, power contrast's plotted curve that test obtains.As seen from the figure, under this kind of operating mode, imitative sea-gull airfoil fan 2 is compared with rule blade, and efficiency significantly improves, and average increase rate reaches 25.77%.
In sum, when reynolds' number is 100000, when the angle of attack is 0 ~ 20 °, the lift coefficient of sea-gull aerofoil profile 1 and ratio of lift coefficient to drag coefficient are all higher than standard aerofoil profile, and compared with rule blade, imitative sea-gull airfoil fan 2 efficiency of the present invention significantly improves, more abundant to the utilization of wind energy.
Claims (1)
1. a 100W blade of wind-driven generator, it is characterized in that: its blade adopts sea-gull aerofoil profile (1), take from gull wings semispan, distance wing root 50% place, the maximum ga(u)ge (t) of sea-gull aerofoil profile (1) is positioned at 20.63% of chord length (c), the maximum camber (f) of sea-gull aerofoil profile (1) is positioned at 45.06% of chord length (c), when chord length (c) is for unit length 1, the maximum ga(u)ge (t) of sea-gull aerofoil profile (1) is 0.1079, the maximum camber (f) of sea-gull aerofoil profile (1) is 0.1094, sea-gull aerofoil profile (1) meets following table in the exhibition of imitative sea-gull airfoil fan (2) difference to the chord length (c) on position and established angle (θ):
。
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CN103883483B true CN103883483B (en) | 2016-04-06 |
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CN104214054B (en) * | 2014-08-28 | 2016-08-17 | 吉林大学 | A kind of small-sized wind power generator blade |
CN104354850B (en) * | 2014-10-30 | 2016-03-09 | 中国人民解放军空军航空大学 | A kind of HAE fixed wing aircraft Airfoil |
CN104405596B (en) * | 2014-12-12 | 2017-02-22 | 华北电力大学 | Wind turbine generator system low-wind-speed airfoil section family |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN2876367Y (en) * | 2005-11-09 | 2007-03-07 | 申振华 | Large deflection wind force machine wing shape |
CN101813070A (en) * | 2010-04-13 | 2010-08-25 | 南京航空航天大学 | Vane airfoil profile of low power wind driven generator |
CN102400847A (en) * | 2011-11-29 | 2012-04-04 | 吉林大学 | Wind-driven generator blade wing section |
CN203770019U (en) * | 2014-04-17 | 2014-08-13 | 吉林大学 | 100-W wind turbine blade |
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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 |
DE102008052858B9 (en) * | 2008-10-23 | 2014-06-12 | Senvion Se | Profile of a rotor blade and rotor blade of a wind turbine |
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Patent 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 |
CN101813070A (en) * | 2010-04-13 | 2010-08-25 | 南京航空航天大学 | Vane airfoil profile of low power wind driven generator |
CN102400847A (en) * | 2011-11-29 | 2012-04-04 | 吉林大学 | Wind-driven generator blade wing section |
CN203770019U (en) * | 2014-04-17 | 2014-08-13 | 吉林大学 | 100-W wind turbine blade |
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