CN206129493U - Wind energy conversion system vortex generator - Google Patents
Wind energy conversion system vortex generator Download PDFInfo
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- CN206129493U CN206129493U CN201621227715.1U CN201621227715U CN206129493U CN 206129493 U CN206129493 U CN 206129493U CN 201621227715 U CN201621227715 U CN 201621227715U CN 206129493 U CN206129493 U CN 206129493U
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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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Abstract
The utility model discloses a wind energy conversion system vortex generator sets up vortex generator, characterized by on the suction surface of blade: setting up the fin that constitutes vortex generator and being the rectangle, per two rectangle fins use vortex generator's span -wise location line to constitute the vortex unit that is " eight " word as the axial symmetry, the rectangle fin is on the suction surface upright, forms independent bond line between each rectangle fin and the suction surface, makes each vortex unit from blade root portion to leaf top along tangential location line interval and evenly distributed on the suction surface. The utility model discloses an arrange form of rectangle fin on the blade is optimized to the rectangle fin to produce the powerful vortex, obtain better pneumatic performance.
Description
Technical field
This utility model is related to a kind of vortex generator for pneumatic equipment bladess.
Background technology
Wind energy conversion system is to realize to contain the engine that kinetic energy is changed into blade rotating mechanical energy and then is changed into electric energy in wind
Tool.Pneumatic equipment bladess are the core components of wind energy conversion system, and its aeroperformance is to weigh the good and bad important indicator of blade.
With the development of Wind Power Generation Industry and going deep into for progressive and research, wind-powered electricity generation single-machine capacity constantly increases, wind energy conversion system size
It is continuously increased, the blade profile of wind energy conversion system also becomes increasingly complex, flowing the angle of attack than in the case of larger, or in the shadow of fluctuating wind
Ring, the upper surface of pneumatic equipment bladess will occur to separate so that the aerodynamic characteristic severe exacerbation of blade.To the high aeroperformance of wind energy conversion system
Pursuit, have stimulated pre-bending, become the generation of the blade new technique such as torsions, sweepback, flexibility and self adaptation and develop.
Nearby flow field is sufficiently complex for wind energy conversion system, and asymmetric the becoming a mandarin that wind shear, windage yaw boat cause cause with the factor such as turbulent flow
Unsteady become a mandarin etc. blade surface can be made flow separation occur, increase flow control apparatus and be for example vortexed in blade surface and send out
Raw device becomes trend of the times.
Vortex generator (Vortex Generator, VG) is produced on aerofoil or fuselage for preventing air-flow from separating
The fin of raw micro cyclone.Vortex generator is that the Bmynes and Tyalr of American Association Aircraft Company are proposed earliest, is initially used for boat
Empty aircraft wing, extends to pneumatic equipment bladess afterwards.
In disclosed pertinent literature, vortex generator generally adopt triangular flap, but its in aeroperformance still
Have to be hoisted.
Utility model content
This utility model is to avoid the deficiency existing for above-mentioned prior art, there is provided a kind of wind for pneumatic equipment bladess
Power machine vortex generator, to producing larger vortex, lifts the aeroperformance of blade.
This utility model is adopted the following technical scheme that to solve technical problem：
In this utility model wind energy conversion system vortex generator, wind energy conversion system is upwind horizontal-shaft wind turbine, blade and wheel hub phase
Even, wheel hub is connected with cabin by rotating shaft, and cabin is fixed in tower；The blade has at the top of blade root, leaf, before blade
Edge, blade trailing edge, arrange vortex generator on the suction surface of blade；
This utility model wind energy conversion system vortex generator is structurally characterized in that：The fin for constituting vortex generator is set in square
Shape, is constituted cyclone unit in " eight " word as axial symmetry to position line with the exhibition of vortex generator per two panels rectangular tab；By wind
The each section airfoil suction side surface of power machine blade is defined as vortex generator from the line that blade inlet edge 0.1c to 0.2c places are linked to be
Tangential position line, at the tangential position line position, each rectangular tab is in suction for the fin front end of each rectangular tab
In upright on face, and it is bonded on suction surface with fin bottom surface, between each rectangular tab and suction surface, forms independent viscous
Close layer, make each cyclone unit on suction surface from blade root to leaf at the top of along tangential position line be spaced and be uniformly distributed；C for exhibition to
Aerofoil profile chord length at position line position on blade profile.
The construction featuress of this utility model wind energy conversion system vortex generator lie also in：In the rectangular tab, positioned at fin
The lead and trail edge of top margin, is respectively set to chamfering.
The construction featuress of this utility model wind energy conversion system vortex generator lie also in：The blade be variable cross-section twisted blade, leaf
Leaf length is not less than 10m.
The construction featuress of this utility model wind energy conversion system vortex generator lie also in：For Stall Type wind energy conversion system, each vortex is single
Unit is evenly arranged on whole blade, and the whole blade refers to the whole leaf position at the top of from blade root to leaf；For change
Paddle type wind energy conversion system, each cyclone unit leisure blade maximum chord length position at the top of leaf between be evenly arranged.
The construction featuress of this utility model wind energy conversion system vortex generator lie also in：Definition：The height of rectangular tab be H, square
The length of shape fin is L, the sideline of fin bottom surface and to open up to the angle between position line be α, in a cyclone unit, two
Span distance of the rectangular tab at fin front position is a；In two adjacent cyclone units, interjacent two wings
Exhibition at the fin front position of piece is at intervals of b.
Arrange：L/c=0.02-0.03, H/c=0.005-0.0075, α=15 ° -25 °, a=10mm-20mm, b=2a.
The construction featuress of this utility model wind energy conversion system vortex generator lie also in：At the top of from blade root towards leaf, each rectangle
The size of fin is tapered into, and the two panels rectangular tab in same cyclone unit is equivalently-sized.
Compared with the prior art, this utility model has the beneficial effect that：
1st, this utility model adopts rectangular tab, optimizes arrangement form of the rectangular tab on blade, powerful so as to produce
Vortex, obtain more preferable aeroperformance；Separate adhesive between its each rectangular tab and suction surface, sound construction reliability, it is easy to
Change, and can guarantee that the mobility of blade suction surface.
2nd, this utility model arranges chamfering in the lead and trail edge of fin top margin, on the one hand improves using safety.
3rd, this utility model from blade root towards leaf at the top of, the size of each rectangular tab is tapered into, can be further
Improve the effect of flowing control.
4th, this utility model determines the arrangement of vortex generator according to wind energy conversion system type, with strong points.
Description of the drawings
Fig. 1 be this utility model in be provided with vortex generator pneumatic equipment bladess floor map；
Fig. 2 be this utility model in be provided with vortex generator pneumatic equipment bladess dimensional structure diagram；
Fig. 3 be this utility model in be provided with vortex generator pneumatic equipment bladess view profile；
Fig. 4 is vortex generator distribution schematic diagram in this utility model；
Fig. 5 is the geometric model schematic diagram of numerical simulation in this utility model；
Fig. 6 is wind energy conversion system schematic diagram in this utility model；
Fig. 7 is S809 wing-type vortex generators lift result of calculation figures；
Fig. 8 is S809 wing-type vortex generators drag evaluation result figures；
Fig. 9 is certain 1.5MW wind mill airfoil vortex generator lift result of calculation figure；
Figure 10 is certain 1.5MW wind mill airfoil vortex generator drag evaluation result figure；
Label in figure：1 wind energy conversion system, 2 blades, 3 wheel hubs, 4 cabins, 5 towers, 6 blade roots, at the top of 7 leaves, 8 blade inlet edges, 9
Blade trailing edge, 10 cyclone units, 11 rectangular tabs, 12 tangential position lines, 13 open up to position line, 14 fin top margins, 15 fin bottoms
Face, 16 fin front ends, 17 fin rear ends, 18 adhesive layers, 19 section aerofoil profiles, 20 suction surfaces, 21 pressure faces, 22 aerofoil profile chord lengths, 23
Fin height, 24 finned lengths, 25 angles, 26 span distances, 27 open up to interval, 28 three-dimensional straight blade sections.
Specific embodiment
Referring to Fig. 6, in the present embodiment, wind energy conversion system is upwind horizontal-shaft wind turbine 1, and blade 2 is connected with wheel hub 3, wheel hub 3
It is connected with cabin 4 by rotating shaft, cabin 4 is fixed in tower 5.
Referring to Fig. 1, blade 2 has 7, blade inlet edge 8, blade trailing edge 9, section aerofoil profile 19, suction at the top of blade root 6, leaf
Face 20 and pressure face 21, arrange vortex generator on the suction surface 20 of blade.
Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the fin for arranging composition vortex generator is rectangular, per two panels rectangular tab 11
Cyclone unit 10 in " eight " word is constituted as axial symmetry to position line 13 with the exhibition of vortex generator；By pneumatic equipment bladess each section
The surface of the suction surface 20 of aerofoil profile 19, the line being linked to be for 0.1c to 0.2c places with a distance from blade inlet edge 8 are defined as vortex to be occurred
The tangential position line 12 of device, the fin front end 16 of each rectangular tab 11 are at 12 position of tangential position line, each RECTANGULAR WINGS
Piece 11 in upright, and is bonded on suction surface 20 with fin bottom surface 15 on suction surface 20, each rectangular tab 11 and suction
Independent adhesive layer 18 is formed between face 20, make each cyclone unit 10 on suction surface 20 from blade root 6 to leaf at the top of 7 along tangential
Position line 12 is spaced and is uniformly distributed；C is exhibition to the aerofoil profile chord length 22 on blade profile at 13 position of position line.
In being embodied as, corresponding structure setting also includes：
In rectangular tab 11, chamfering is respectively set to positioned at the lead and trail edge of fin top margin 14, i.e., office is in fin
Chamfering is set on the angle position of front end 16 and fin rear end 17 and fin top margin 14；Blade 2 be variable cross-section twisted blade, blade
Length is not less than 10m.
For Stall Type wind energy conversion system, each cyclone unit 10 are evenly arranged on whole blade, whole blade is referred to from blade root
Whole leaf position at the top of portion to leaf；For paddle type wind energy conversion system is become, which is generally large scale wind power machine, blade root, the wing at middle part
Adopting thick wing type, this aerofoil profile to increased the area of cross section and bending the moment of inertia, sacrificing maximum lift coefficient type more
While with good stalling characteristics and stability, therefore arranged using vortex generator partial blade, i.e. cyclone unit 10
Comfortable blade maximum chord length position at the top of leaf between be evenly arranged.
Definition：The fin height 23 of rectangular tab 11 is H, and the finned length 24 of rectangular tab 11 is L, fin bottom surface 15
Sideline and open up to the angle 25 between position line 13 be α, in a cyclone unit 10, two rectangular tabs are in fin front end 16
Span distance 26 at position is a；In two adjacent cyclone units, the fin front end of interjacent two fins 16
The exhibition for putting place is b to interval 27；Arrange：L/c=0.02-0.03, H/c=0.005-0.0075, α=15 ° -25 °, a=10mm-
20mm, b=2a.
In the present embodiment, pneumatic equipment bladess are variable cross-section twisted blade, and blade difference opens up the chord length meeting of the section aerofoil profile to position
Change, it is contemplated that optimum flowing control effect, from blade root towards leaf at the top of, the size of each rectangular tab 11 gradually becomes
It is little, and the two panels rectangular tab in same cyclone unit 10 is equivalently-sized.
In the present embodiment, the method for numerical simulation of wind energy conversion system vortex generator is：
Definition：The height of rectangular tab 11 is H, and the length of rectangular tab 11 is L, the sideline of fin bottom surface 15 and Zhan Xiangding
Angle between bit line 13 is α, in a cyclone unit 10, exhibition of two rectangular tabs at 16 position of fin front end to away from
From for a；In two adjacent cyclone units, the exhibition at 16 position of fin front end of interjacent two fins at intervals of
b；The numerical simulation of wind energy conversion system vortex generator is realized as follows：
The dimensional airfoil of blade 2 is extended along the direction perpendicular to aerofoil section, three-dimensional straight blade sections 28 are obtained；Counting
In value simulation, the line that pneumatic equipment bladess each section airfoil suction side surface is linked to be away from leading edge 0.2c is defined as into vortex generator
Tangential position line 12；Arrange：A=15mm, b=30mm, α=20 °, L/H=4, L/c=0.025, c=1000mm complete number
The Geometric Modeling of value simulation obtains geometric model；Using mesh modeling software for geometric model carries out full structured grid modeling
Obtain grid model；Computational fluid dynamics software is recycled for grid model carries out the Numerical-Mode of wind energy conversion system vortex generator
Intend.
In being embodied as, the quantity of vortex generator determines as follows：
For Stall Type wind energy conversion system, wind eddies flow-generator is uniformly distributed in length l of whole blade, for becoming paddle type wind
Power machine, wind eddies flow-generator at the top of the blade maximum chord length position to leaf between be evenly arranged.
Initial setting span distance 26 is a0, it is b to open up to interval 270, and a0=10mm-20mm, b0=2a0。
Calculate quantity n is set at the beginning of vortex generator0For：n0=l/ (a0+b0)), by n0Round as n1, further preferably set vortex and send out
Raw device quantity n is 5n1, determine that actual span distance 26 is a by such as following formula (1) and formula (2), and to open up to interval 27 be b：
L/n=a+b (1)
B=2a (2)
In being embodied as, in vortex generator, the size of rectangular tab determines as follows：
The height 23 of the rectangular tab of initial setting vortex generator is H0, length 24 is L0, unit is millimeter, then has：
L0=x1c (3)
H0=x2c (4)
And have：x1=0.02-0.03, x2=0.005-0.0075.
In view of the produce reality of actual vortex generator, for L0And H0Rounded respectively and obtained vortex generator
Rectangular tab physical length L and height H.
According to the foline momentum theory in wind energy conversion system aerodynamic, blade is extended to being divided into multiple folines, each foline phase
To independence, it is independent of each other, can be considered dimensional airfoil.
By method Computational Fluid Dynamics, the CFD of computational fluid dynamicses, checking vortex occurs
The flowing control effect of device.CFD approach is by iterative numerical means, the governing equation in stream field, such as continuity equation, momentum
Conservation equation or energy conservation equation carry out direct solution process, finally give aerodynamic parameter.
From the foline momentum theory in wind energy conversion system aerodynamic, can be acted on each section of foline by calculating
Aerodynamic loading so as to obtaining acting on the aerodynamic loading on whole blade.Therefore the numerical simulation of blade be able to can be passed through
The simulation of aerofoil profile is reflected.
S809 aerofoil profile and certain 1.5MW wind energy conversion system 30% relative thickness of the present embodiment for Stall Type Phase VI wind energy conversion systems
The dimensional airfoil in section carries out numerical simulation, and result of calculation is as shown in Fig. 7, Fig. 8 Fig. 9 and Figure 10.
Due to vortex generator along blade open up to translation cycle, the present embodiment by dimensional airfoil along perpendicular to aerofoil profile cut
Face extends certain length, obtains a three-dimensional prismatic blade section, then arranges rectangular vortex generator in leaf model, obtains mould
The geometric model of plan.Then structured grid is built to which, finally numerical computations is carried out with CFD software.
Fig. 7 gives the lift coefficient of 809 aerofoil profile of the D S (VGs) for being provided with vortex generator, and be not provided with whirlpool
The result of calculation (NO_VG) of the aerofoil profile of flow-generator is contrasted.9.22 ° are less than () under Low Angle Of Attack, airfoil surface is substantially not
Generation is separated, and vortex generator slightly increases the lift of aerofoil profile to aerofoil profile.With the increase of the angle of attack, airfoil surface gradually occurs
Separate, vortex generator gradually improves the lift of aerofoil profile, while delaying stall angle, maximum lift coefficient is carried by 1.121
1.34 are raised to, lifting amplitude reaches 11.6%.
Fig. 8 gives the lift coefficient of 809 aerofoil profile of the D S (VGs) for arranging vortex generator, and sends out with vortex is not provided with
The result of calculation (NO_VG) of the aerofoil profile of raw device is contrasted.Low Angle Of Attack operating mode (being less than 9.22 °), vortex generator is due to certainly
The form drag of body, can make profile drag have slight increase.As the angle of attack increases, in 9.22 °～16.22 ° range of angles of attack,
As vortex generator has delayed the separation of boundary region, so as to reduce profile drag.As the angle of attack persistently increases, aerofoil profile upper table
Face Disengagement zone gradually increases, and burble point gradually moves forward, and when the angle of attack is increased to after 17.21 °, burble point is advanced to leading edge 20%c
Within, at this moment fluid had occurred and that separation before vortex generator is flowed through, and vortex generator does not play the effect of drag reduction, because
And profile drag increase.
Fig. 9 give arrange vortex generator certain 1.5MW wind mill airfoil (VGs) lift coefficient, and be not provided with
The result of calculation (NO_VG) and experiment value (EXP) of the aerofoil profile of vortex generator is contrasted.Low Angle Of Attack operating mode (being less than 10 °),
Vortex generator affects less (slightly to increase) on profile lift, and after 12 ° of angles of attack, airfoil surface occurs to separate, and is now vortexed
Generator serves the effect for delaying flow separation and increasing profile lift, and this is similar to the result of calculation of S809 aerofoil profiles.It is different
, as the wind mill airfoil is big thickness aerofoil with blunt tail edge, with good stalling characteristics, i.e., in big range of angles of attack,
Higher level is stablized and be in lift coefficient, is presented as that burble point is no the wing is promptly advanced to as thin airfoil in flowing
Type leading edge, therefore, after addition vortex generator, profile lift persistently rises with the increase of the angle of attack, does not occur mistake
Fast phenomenon, under 20 ° of angles of attack, vortex generator can also play good lift-rising effect.
Figure 10 give arrange vortex generator FD82B wind mill airfoils (VGs) resistance coefficient, and be not provided with whirlpool
The result of calculation (NO_VG) and experiment value (EXP) of the aerofoil profile of flow-generator is contrasted.In Low Angle Of Attack operating mode (being less than 10 °), whirlpool
Flow-generator can slightly lift profile drag due to the form drag of its own, and after 12 ° of angles of attack, vortex generator is due to prolonging
Slow flow separation reduces profile drag.Within not being advanced to aerofoil profile leading edge 20%c due to flow separation point, vortex occurs
Device still has drag-reduction effect under 20 ° of angles of attack.
Result above can see big angle of attack operating mode, and airfoil surface engenders flow separation, now vortex generator energy
The effect of lift-rising drag reduction is played, from foline momentum theory, aerofoil profile aerodynamic characteristic can reflect blade aerodynamic characteristic, i.e., big
Arrives stream wind speed operating mode, vortex generator have the effect of good suppression flow separation.
The vortex generator that numerical simulation result demonstrates utility model is equal in Stall Type wind energy conversion system and change paddle type wind energy conversion system
There is preferably flowing control effect.
Claims (6)
1. a kind of wind energy conversion system vortex generator, the wind energy conversion system are upwind horizontal-shaft wind turbine (1), blade (2) and wheel hub (3)
It is connected, wheel hub (3) is connected with cabin (4) by rotating shaft, and cabin (4) is fixed in tower (5)；The blade (2) is with blade root
(7), blade inlet edge (8), blade trailing edge (9) at the top of portion (6), leaf, arrange vortex generator on the suction surface (20) of blade, its
It is characterized in that：The fin for arranging composition vortex generator is rectangular, per two panels rectangular tab (11) with the Zhan Xiangding of vortex generator
Bit line (13) constitutes the cyclone unit (10) in " eight " word for axial symmetry；By pneumatic equipment bladess each section airfoil suction side surface from
The line that blade inlet edge 0.1c to 0.2c places are linked to be is defined as the tangential position line (12) of vortex generator, each rectangular tab (11)
At tangential position line (12) position, each rectangular tab (11) is on suction surface (20) in straight for fin front end (16)
It is vertical, and be bonded on suction surface (20) with fin bottom surface (15), formed between each rectangular tab (11) and suction surface (20)
Independent adhesive layer (18), make each cyclone unit (10) on suction surface (20) from blade root (6) to leaf (7) along tangential fixed
Bit line (12) is spaced and is uniformly distributed；C is exhibition to the aerofoil profile chord length on blade profile at position line (13) position.
2. wind energy conversion system vortex generator according to claim 1, is characterized in that：In the rectangular tab (11), it is located at
The lead and trail edge of fin top margin (14), is respectively set to chamfering.
3. wind energy conversion system vortex generator according to claim 1, is characterized in that：The blade (2) is variable cross-section twisted blade,
Length of blade is not less than 10m.
4. wind energy conversion system vortex generator according to claim 1, is characterized in that：For Stall Type wind energy conversion system, each vortex is single
First (10) are evenly arranged on whole blade, and the whole blade refers to the whole leaf position at the top of from blade root to leaf；It is right
In becoming paddle type wind energy conversion system, each cyclone unit (10) leisure blade maximum chord length position at the top of leaf between be evenly arranged.
5. wind energy conversion system vortex generator according to claim 1, is characterized in that：Definition：The height of rectangular tab (11) is
H, the length of rectangular tab (11) is L, the sideline of fin bottom surface (15) with to open up to the angle between position line (13) be α, one
In individual cyclone unit (10), span distance of two rectangular tabs at fin front end (16) position is a；In two adjacent whirlpools
In stream unit, the exhibition at fin front end (16) position of interjacent two fins is at intervals of b；
Arrange：L/c=0.02-0.03, H/c=0.005-0.0075, α=15 ° -25 °, a=10mm-20mm, b=2a.
6. wind energy conversion system vortex generator according to claim 1, is characterized in that：At the top of from blade root towards leaf, each rectangle
The size of fin (11) is tapered into, and the two panels rectangular tab in same cyclone unit (10) is equivalently-sized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621227715.1U CN206129493U (en) | 2016-11-11 | 2016-11-11 | Wind energy conversion system vortex generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621227715.1U CN206129493U (en) | 2016-11-11 | 2016-11-11 | Wind energy conversion system vortex generator |
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| CN206129493U true CN206129493U (en) | 2017-04-26 |
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ID=58562989
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321347A (en) * | 2016-11-11 | 2017-01-11 | 安徽新力电业科技咨询有限责任公司 | Wind driven generator eddy generator |
-
2016
- 2016-11-11 CN CN201621227715.1U patent/CN206129493U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321347A (en) * | 2016-11-11 | 2017-01-11 | 安徽新力电业科技咨询有限责任公司 | Wind driven generator eddy generator |
| CN106321347B (en) * | 2016-11-11 | 2021-12-10 | 安徽新力电业科技咨询有限责任公司 | Wind turbine vortex generator |
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