CN206071794U - A kind of wind energy conversion system ventilating duct - Google Patents
A kind of wind energy conversion system ventilating duct Download PDFInfo
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- CN206071794U CN206071794U CN201621088829.2U CN201621088829U CN206071794U CN 206071794 U CN206071794 U CN 206071794U CN 201621088829 U CN201621088829 U CN 201621088829U CN 206071794 U CN206071794 U CN 206071794U
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- ventilating duct
- energy conversion
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- wing
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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
- 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
Abstract
The utility model discloses a kind of wind energy conversion system ventilating duct, the ventilating duct is formed using the target Curve of wing Jing Space Rotatings obtained Jing after expanding corresponding multiple based on the Curve of wing of airfoil structure, which includes the import afflux section being sequentially connected, middle throat section and outlet diffuser, wherein, the import afflux section is corresponding to the larger one end of target Curve of wing meanline curvature, the outlet diffuser corresponds to the less one end of target Curve of wing meanline curvature, maximum gauge of the minimum diameter of the middle throat section less than the maximum gauge and outlet diffuser of import afflux section.This utility model can be effectively improved blade flow field while wind-force engine efficiency is improved, and reduce the influence area of Shedding Vortex, have the advantages that simple structure, applied widely.
Description
Technical field
This utility model belongs to ventilating duct field, more particularly, to a kind of wind energy conversion system ventilating duct.
Background technology
Wind energy conversion system is the core of wind-power electricity generation, is widely used in the field of regenerative resource wind collecting wind-power electricity generation
Institute, alleviates situation about sharply increasing because of the rapid growth demand for energy of demographic and economic with this, and makes up the biography such as coal, oil
The contaminative and non-renewable inferior position of the system energy.
Due to the optimization for blade wind energy conversion system is caught can efficiency raising it is limited, and pass through the additional ventilating duct of wind energy conversion system
Scheme can further improve the power coefficient of wind energy conversion system, so the scheme of additional ventilating duct starts progressively to be applied to wind energy conversion system design
In.And for the research of ventilating duct configuration design, the ventilating duct for generally adopting is simple circular arc or straightway shape, this
Not only efficiency is low for a little designs, and only effective in the wind energy conversion system of a certain determination, and the scope of application is little.To solve conventional wind machine
Wind energy extraction efficiency is low, the unstable problem in flow field, and then realizes efficient, stable work, designs a efficient and applicable
The ventilating duct of many specification wind energy conversion systems is significant and using value.
Utility model content
For the disadvantages described above or Improvement requirement of prior art, this utility model provides a kind of wind energy conversion system ventilating duct, its
The maximized objective optimization of power coefficient, the reason with preferable lift-drag ratio are realized based on the design of the conventional aerofoil profile of pneumatic equipment bladess
By, using new ventilating duct is designed based on vane airfoil profile structural parameters, carry out the exploration of novel wind motor, ensure wind
Power engine efficiency is simultaneously and the characteristics of can reach general applicability, improve wind energy conversion system catch can efficiency while and with stable wind
Power machine flow field.
For achieving the above object, the utility model proposes a kind of wind energy conversion system ventilating duct, the ventilating duct adopts airfoil structure
Curve of wing based on the target Curve of wing Jing Space Rotatings that obtain Jing after expanding corresponding multiple form, which includes phase successively
Import afflux section even, middle throat section and outlet diffuser, wherein, the import afflux section is corresponding in target Curve of wing
The larger one end of camber line curvature, the outlet diffuser correspond to the less one end of target Curve of wing meanline curvature, described
The minimum diameter of middle throat section is less than import afflux section and the maximum gauge for exporting diffuser.
As it is further preferred that the minimum diameter of the middle throat section is excellent with the ratio of import afflux section maximum gauge
Elect 1 as：1.2～4.Under the preferred ratio, in the case where inlet diameter and throat diameter maximum magnitude is ensured, again can be by the wing
Type curve radian is adjusted to the radian being more suitable for air velocity distribution, and both ensure raising wind energy conversion system catches energy efficiency, can improve gas again
The uniformity of flow field flow around stream.
As it is further preferred that the middle throat section be straightway, which is by target Curve of wing from import afflux section
Friendship is intercepted at 26%～35% position of axial direction risen backward to rear exit diffuser, this section of camber line is changed into into straight line,
And form straight line Jing Space Rotatings.
As it is further preferred that the middle throat section is straightway, its by inserting a straight line in target Curve of wing,
And form straight line Jing Space Rotatings.
As it is further preferred that the wind energy conversion system is arranged at 35%～55% position of straightway.
As it is further preferred that the ventilating duct length be preferably 0.8-3.5 times wind energy conversion system impeller diameter,
The uniformity of air velocity distribution can be ensured under the length, the demand of installing space has been taken into full account again.The thickness of ventilating duct according to
Material therefor and related processing technique preferred value are 2-25mm, and the installation blade tip clearance of the wind energy conversion system is according to required technique and peace
Dress space requirement, it is contemplated that airflow characteristic, preferred scope are 5-30mm.
As it is further preferred that the length of a straight line of the insertion is preferably 26%～40% target Curve of wing
Axial length.
After it is further preferred that the target Curve of wing first rotates to an angle around the distal point of outlet diffuser
Jing Space Rotatings again.
As it is further preferred that the angle of target Curve of wing rotation is preferably+25 °.
In general, by the contemplated above technical scheme of this utility model possess compared with prior art, mainly with
Under technological merit：
1. this utility model in ventilating duct Profile Design based on wind mill airfoil structural parameters, by adjust the wing
The chord length and thickness of type determines the basic engineering molded line of ventilating duct, then after the rotary shaft of wind turbine impeller is rotated into housing
Gained, as the molded line for import afflux section with outlet diffuser is selected and control, is more beneficial for the flowing of air-flow, and improves
Energy efficiency is caught in flow field around which, improve wind energy conversion system, and then effectively improves the low problem of existing wind-force engine efficiency.
2. in this utility model, the basic molded line of ventilating duct Profile Design refers to wind mill airfoil bulbous bow profile, due to routine
The design parameter of molded line is, it is known that so to transfer parameter easy, and by expanding different multiples, obtains appropriate design curve
Also inducer and throat's position diameter ratio are can control simultaneously, can be obtained the more excellent scheme suitable for different wind energy conversion systems, and then be solved
Existing air duct structure is single, can only one-to-one matching problem.
3. this utility model considers that the ventilating duct design parameter of wind energy conversion system is not of uniform size to the influence degree of wind-force engine efficiency,
In ventilating duct profile lines, ventilating duct import and throat opening area ratio for wind mill performance affects larger in this utility model
On the basis of propose appropriate design ventilating duct profile lines and adjust import and export area ratio parameter, the parameter designed can be direct
It is applied to the wind energy conversion system of more specifications by amplifying relative fold, so as to designing a efficient and there can be general applicability
Ventilating duct.
4. the circular arc of middle throat section is changed into straightway or is directly added into the straightway of proper proportion by this utility model
Or the angle of adjustment Curve of wing so that the molded line of design is widely applied to different types of wind energy conversion system, leading inlet
Afflux section is chosen with end outlet diffuser design curve and designs more reasonable, and the adjustable multi-scheme in middle standpipe portion position is selected,
The capture ability of wind energy conversion system is improved according to the required scheme for taking performance optimal, the influence area of Shedding Vortex is reduced, improves surrounding
Flow field, so as to may be selected to obtain an optimal case suitable for efficient wind energy conversion system need to be carried.
Description of the drawings
Fig. 1 (a) and (b) are the integrally-built front view of band ventilating duct wind energy conversion system and left view；
Fig. 2 is symmetrical aerofoil profile molded line structure schematic diagram；
Fig. 3 is asymmetric airfoil molded line structure schematic diagram；
Fig. 4 is the structural representation of the ventilating duct that embodiment 1 takes the fitting molded line acquisition of aerofoil profile camber line；
Fig. 5 is the structural representation of the ventilating duct that embodiment 2 takes the fitting molded line acquisition of aerofoil profile arc-straight section；
Fig. 6 is the structural representation of the ventilating duct that embodiment 3 takes the fitting molded line acquisition of aerofoil profile arc-straight section；
Fig. 7 is the air duct structure schematic diagram that embodiment 4 is obtained using aerofoil profile arc rotating angle；
Fig. 8 is wind energy conversion system using numerical simulation and the proving and comparisom figure of test measurement；
Fig. 9 applies the characteristic curve analysis chart in wind energy conversion system for this utility model embodiment 1；
Figure 10 applies the characteristic curve analysis chart in wind energy conversion system for this utility model embodiment 2.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.It should be appreciated that specific embodiment described herein is only to explain
This utility model, is not used to limit this utility model.Additionally, institute in this utility model disclosed below each embodiment
As long as the technical characteristic being related to does not constitute conflict each other and can just be mutually combined.
As shown in figure 1, a kind of wind energy conversion system ventilating duct that this utility model embodiment is provided, the ventilating duct is for wind energy conversion system
Air-flow is conveyed, and the target aerofoil profile which is obtained based on adopting the Curve of wing of wind mill airfoil structure Jing after expanding corresponding multiple is bent
Line Jing Space Rotatings are formed, and which includes import afflux section 1, middle throat section 2 and the outlet diffuser 3 being sequentially connected, wherein, institute
Import afflux section 1 is stated corresponding to the larger one end of target Curve of wing meanline curvature, the outlet diffuser 3 corresponds to target
The less one end of Curve of wing meanline curvature, (i.e. the port of import afflux section is corresponding for the maximum gauge of the import afflux section 1
Diameter) and outlet diffuser 3 the desirable identical value of the maximum gauge corresponding diameter in port of diffuser (export), the diameter
It is designated as R1If (value is different, remembers mouthful 1 maximum gauge of afflux section into for R1), and the minimum diameter of middle throat section 2 (which is wind-guiding
The minimum position of cylinder diameter) it is designated as R2, R1>R2, while also needing the maximum gauge for ensureing outlet diffuser to be more than R2.The ventilating duct
Throat position wind turbine impeller is installed, ventilating duct central shaft rotates overlapping of axles with wind turbine impeller, and its horizontal distribution is designated as sky
Between rectangular coordinate system X-axis, the plumb line vertical with X-axis be designated as Y-axis.
Ventilating duct import afflux section and outlet diffuser are matrix curve, and the aerofoil profile for adopting is wind energy conversion system and other such as pumps
With the airfoil structure commonly used in the fluid machinery such as blower fan, which is designed air duct structure based on airfoil structure parameter and (is for example adopted
NACA series aerofoil sections, such as NACA16, NACA18 etc. are used, which is conventional airfoil structure, and airfoil structure parameter is known), because often
Two sections of camber line compositions are with airfoil structure, selection airfoil structure is symmetrical with regard to chord positions in the xy plane, then can cut
Take in two symmetrical airfoil structure curves, output relevant parameter coordinate points (X, Y), because of aerofoil profile string in airfoil database
Long long measure is 100%, and through expanding a times of X, b times of Y (a, b are arithmetic number, can use identical value) is appropriate so as to obtain
Import afflux section (considers the composite factor of curve and diameter ratio, design value is preferably in R1/R2 with throat position diameter ratio
=1.2～4/1, under the ratio, you can ensure in the case of inlet diameter with throat diameter maximum magnitude, again can be by aerofoil profile
Curve radian is adjusted to the radian being more suitable for air velocity distribution, and both ensure raising wind energy conversion system catches energy efficiency, can improve gas again
The uniformity of flow field flow around stream), target Curve of wing is obtained, if choosing airfoil structure mal-distribution in the xy plane,
The relatively large half camber line of camber can be intercepted, same output coordinate point suitable multiple needed for expanding obtains target aerofoil profile
Curve.
Target Curve of wing is the basic engineering curve of ventilating duct, and curve is rotated around X-axis in rectangular coordinate system in space
Into housing, at its minimum diameter, be throat section, the corresponding wind turbine impeller blade inlet edge position of the minimum place's point of diameter, wind energy conversion system with
X-axis is rotary shaft, places wind turbine impeller as standard.
One end of target Curve of wing meanline curvature less (namely the change of circular arc radian is more slow) is outlet diffusion
Section, opposite side camber line curvature it is larger for import afflux section.Import afflux section is larger beneficial to collection air-flow because of curvature, so that
Being transported to air-flow at wind energy conversion system increases, and increases the complementary energy efficiency of wind energy conversion system, and import afflux section using the design of airfoil structure,
So that the maximized advantage of lift-drag ratio is applied in vane design of wind turbines theory, and because the aerofoil profile ventilating duct of reasonable molded line
Presence increased swabbing action of the impeller to air-flow, and then improve wind energy conversion system power coefficient.Outlet diffuser arc curvature of a curve
Less, the more favourable guiding function for playing air-flow in wind energy conversion system, but the kinetic energy beneficial to exit flow is converted into static energy.
In this utility model, target Curve of wing can be also improved by ventilating duct basic engineering curve, ensure import
Afflux section is constant with camber line with outlet diffuser diameter, can be in target Curve of wing axial length (i.e. along the length of ventilating duct axial direction
Degree, namely the total length of ventilating duct) 26%～35% position at (regulation with import afflux section as initiating terminal, export diffuser
For end), it is different according to selected aerofoil profile situation, preferentially take a little to intercept backward in the position range and hand over to rear exit section,
This section of camber line is changed into into straightway (particularly a point is selected at the 26%～35% of Curve of wing axial length, with this
Point is the horizontal-extending one section of straight line of starting point, until the straight line intersects at another point, the curve between 2 points with target Curve of wing
Substituted by the straight line), or will cut at throat section minimum diameter and be directly added into one section and account for master curve axial length 26%-40%
Straightway, the matched curve for obtaining, by being rotated into housing by rotary shaft of X-axis under rectangular coordinate system in space, is obtained
Designed wind-guiding barrel shape, now throat section rotated around X-axis by straightway and formed, the ventilating duct of formation need to ensure straight line throat section
Diameter and 1 maximum gauge of import afflux section ratio 1：In the range of 1.2～4.Wind energy conversion system (the leading edge of wind turbine impeller blade
Point) be placed at 35～55% right positions of throat section straightway (equally with import afflux section as initiating terminal, outlet diffuser
For end), maximum raising can be obtained import wind speed ratio is ensured, improve air velocity distribution distribution, further improve ventilating duct efficiency.
Fig. 1 is wind energy conversion system and the front view and left view of the whole machine schematic diagram of designed ventilating duct, rotary shaft X of wind energy conversion system
Axle and ventilating duct center overlapping of axles.Wind turbine impeller be arranged on arc-straight type ventilating duct throat section straightway 35%～
At 55% right position (or throat section of arc line type ventilating duct), air-flow is taken out because the presence of aerofoil profile ventilating duct increased impeller
Suction is acted on, and then improves wind energy conversion system power coefficient, can be obtained maximum raising import wind speed ratio is ensured, further be improved ventilating duct
Efficiency.
Fig. 2 is, with regard to symmetrical airfoil structure example of parameters, can to intercept one in two symmetrical airfoil structure curves, with
Based on this, design curve is designed.
Fig. 3 is asymmetrical airfoil structure example of parameters, can intercept the relatively large top half camber line of camber, be made with this
Based on design curve be designed.The relevant parameter coordinate points (X, Y) of output aerofoil profile molded line, through expanding a times of X, b times of Y, from
And appropriate import afflux section and throat's position diameter ratio are obtained, obtain target Curve of wing.
Fig. 4 and Fig. 5 are the designed two kinds of ventilating duct for obtaining on the basis of resulting target Curve of wing.Will
Curve is rotated into housing around X-axis in rectangular coordinate system in space, is throat section, you can obtain shown in Fig. 4 at its minimum diameter
Arc line type aerofoil profile ventilating duct, wind turbine impeller blade inlet edge position correspondence is positioned over the throat section diameter of designed ventilating duct most
At point, wind energy conversion system places wind turbine impeller as standard with X-axis as rotary shaft.
And target Curve of wing is ensureing that import afflux section is constant with camber line with outlet diffuser diameter, can be by the arc of curve
Line is changed to straightway (or being directly added into one section of straightway), the matched curve for obtaining, by with X-axis under rectangular coordinate system in space
Housing is rotated into for rotary shaft, you can obtain the arc-straight type aerofoil profile ventilating duct shown in Fig. 5 and Fig. 6.
And by selected Curve of wing to export diffuser distal point (i.e. low order end in Fig. 7) as the point of rotation, it is flat in XY
Target Curve of wing is obtained after rotating to an angle in face, then shelling is rotated by rotary shaft of X-axis in rectangular coordinate system in space
Body, you can obtain the aerofoil profile arc rotating type aerofoil profile ventilating duct shown in Fig. 7.Wherein, the minimum diameter of middle throat section and import
The ratio of afflux section maximum gauge is preferably 1：1.2～4, under the preferred ratio, the anglec of rotation can be different according to Curve of wing
Preferably+25 ° (specifying with clockwise as "+" in this utility model), when turning clockwise, the maximum gauge of import afflux section 1 becomes
Little, during rotate counterclockwise, the maximum gauge of import afflux section 1 becomes big.
Fig. 8 is to be analyzed gained through CFD numerical computations to contrast with the analysis of experimental test the data obtained, calculates and tries
The variation tendency that power is tested with wind speed is identical, and the error for calculating and testing is 14% or so, it is contemplated that during numerical computations wheel hub and
The structures such as blade connecting portion carry out simplifying process, so error amount is within the acceptable range.This shows that this research sets
The setting of meter adopted numerical computation method, boundary condition is all rational, and numerical result is reliable.So adding
Necessary simulation result obtained from is carried out before work and on the one hand can verify that whether designed ventilating duct more matches the wind that need to improve
Power machine, on the other hand escapable cost avoids the waste of unnecessary time and resource again.
Specific embodiment given below：
Embodiment 1
The a diameter of 1130mm of wind turbine impeller in the present embodiment, 6 leaf of the number of blade, aerofoil profile ventilating duct designing airfoil basis are adopted
With the relevant parameter of NACA16.200 coordinate points of a molded line parameter in the aerofoil profile molded line of NACA16 are recalled (to ensure aerofoil profile
The accuracy of structure, can also adopt the coordinate points more than 200 quantity), coordinate points in the xy plane are as follows：(0.00000
0.00000), (0.00620 0.18690), (0.02490 0.37240), (0.05610 0.55670), (0.09970
0.73970), (0.15570 0.92140), (0.22410 1.10180), (0.30500 1.28070), (0.39820
1.45830), (0.50380 1.63450), (0.62180 1.80910), (0.75200 1.98240), (0.89450
2.15410), (1.04930 2.32420), (1.21620 2.49270) ... (99.24800 0.30800), (99.37820
0.28390), (99.49620 0.26200), (99.60180 0.24230), (99.69500 0.22500), (99.77590
0.20990), (99.84430 0.19710), (99.90030 0.18660), (99.94390 0.17850), (99.97510
0.17270), (99.99380 0.16920), (100.00000 0.16800) are because being related in embodiment for the conventional wing of wind energy conversion system
Type, is that labor method for designing is theoretical at this, therefore coordinate points is not enumerated.
After obtaining Curve of wing, by the coordinate transform of (20X, 30Y), target Curve of wing is obtained, namely obtains wind-guiding
The basic engineering curvilinear coordinate of cylinder：(0 0), (0.124 5.607), (0.498 11.172), (1.122 16.701), (1.994
22.191), (3.114 27.642), (4.482 33.054), (6.1 38.421), (7.964 43.749), (10.076
49.035), (12.436 54.273), (15.04 59.472), (17.89 64.623), (20.986 69.726), (24.324
74.781) ... (1984.96 9.24), (1987.564 8.517), (1989.924 7.86), (1992.036 7.269),
(1993.9 6.75), (1995.518 6.297), (1996.886 5.913), (1998.006 5.598), (1998.878
5.355), (1999.502 5.181), (1999.876 5.076), (2,000 5.04).So as to obtain the basic engineering of ventilating duct
Curve, adjustment direction of a curve make which parallel with X-direction, because impeller diameter D is 1130mm, blade tip clearance are installed in the present embodiment
For 5mm, therefore should ensure that the peak of curve to the distance of X-axis isThe present embodiment by upper shifting X-axis,
Make to move 570+y (y-coordinate of the y values for curve peak) thereon and then basic engineering curve is rotated into after housing i.e. around X-axis
The arc line type aerofoil profile ventilating duct shown in Fig. 4, wind-guiding barrel thickness 2mm is obtained.Then by wind turbine impeller blade inlet edge position pair
Should be positioned at the throat section diameter smallest point of gained ventilating duct, wind energy conversion system places wind-force as standard with X-axis as rotary shaft
Machine impeller.
Fig. 9 carries out energy coefficient C is caught obtained by numerical simulation is analyzed by example 1 and without ventilating duct wind energy conversion systempWith
The variation tendency contrast of tip speed ratio λ, and the variation tendency comparison diagram of impeller speed increasing ratio ε and tip speed ratio λ.Can be seen that in figure,
Catching for the wind energy conversion system of embodiment 1 can coefficient CpAnd porch air speed value with the change incrementss of tip speed ratio λ compared with not plus
The wind energy conversion system of ventilating duct is more, embodiment 1 relative to be not added with ventilating duct F0 schemes its catch can coefficient maximum improve 13%, most
Big tip speed ratio incrementss reach 32%.Due to design aerofoil profile ventilating duct molded line and import afflux section it is reasonable with throat diameter
Control so that flow field produces negative pressure around impeller, increased swabbing action of the impeller to air-flow, so that impeller is to air-flow
Utilization rate increase, and because rational Curve Design cause tip vortex come off region reduction, improve flow field around wind energy conversion system, so
So that high efficiency can be kept in the more broad range of speeds.
Embodiment 2
The a diameter of 1100mm of wind turbine impeller in the present embodiment, 6 leaf of the number of blade, aerofoil profile ventilating duct designing airfoil basis are adopted
With the relevant parameter of NACA18,200 coordinate points of a molded line parameter in the aerofoil profile molded line of NACA18 are recalled (to ensure aerofoil profile
The accuracy of structure, can also adopt the coordinate points more than 200 quantity), after obtaining Curve of wing, by the coordinate of (25X, 25Y)
Conversion, obtains the basic engineering curvilinear coordinate point of target Curve of wing namely ventilating duct, and adjustment direction of a curve makes itself and X-direction
Parallel, because impeller diameter D is 1100mm, it is 15mm that blade tip clearance is installed in the present embodiment, therefore should ensure that the peak of curve
Distance to X-axis isThe present embodiment is by upper shifting X-axis so as to which (the y values are curve highest above to move 565+y
The y-coordinate of point), it is ensured that the distance of the peak of curve to X-axis is 565mm (i.e. the y-coordinate of peak is -565mm), so as to
To the basic engineering curve of ventilating duct, curve is cut as two sections (i.e. in curve most at ventilating duct minimum diameter throat section
At high point), length is added for the straightway of curve axial overall length 36%, it is ensured that import afflux section is with throat section diameter ratio not
Become, the curve matching of gained is rotated into housing around X-axis into after a curve, you can obtain the arc-straight type aerofoil profile shown in Fig. 5
Ventilating duct, processes wind-guiding barrel thickness 15mm, and the leading edge point of wind turbine impeller blade is placed on the 37% of throat's straightway position
Place.
Figure 10 by embodiment 2 and without ventilating duct wind energy conversion system carry out numerical simulation be analyzed obtained by catch can coefficient Cp with
The variation tendency contrast of tip speed ratio λ, and the variation tendency comparison diagram of impeller speed increasing ratio ε and tip speed ratio λ.Can be seen that and reality
Apply 1 variation tendency of example be close to, can improve wind energy conversion system for wind energy catch can coefficient, and increase wind speed, and then improve wind energy conversion system
Efficiency.
Embodiment 3
The a diameter of 1130mm of wind turbine impeller in the present embodiment, 6 leaf of the number of blade, aerofoil profile ventilating duct designing airfoil basis are adopted
With the relevant parameter of NACA16.200 coordinate points of a molded line parameter in the aerofoil profile molded line of NACA16 are recalled (to ensure aerofoil profile
The accuracy of structure, can also adopt the coordinate points more than 200 quantity), after obtaining Curve of wing, by the coordinate of (30X, 40Y)
Conversion, obtains the basic engineering curvilinear coordinate point of target Curve of wing namely ventilating duct.Adjustment direction of a curve makes itself and X-direction
Parallel, because impeller diameter D is 1130mm, it is 30mm that blade tip clearance is installed in the present embodiment, therefore should ensure that the peak of curve
Distance to X-axis isThe present embodiment is by upper shifting X-axis so as to above move 595+y (the y values for curve most
The y-coordinate of high point), it is ensured that the distance of the peak of curve to X-axis is 595mm (i.e. the y-coordinate of peak is -595mm), this reality
Apply example and be changed to straightway by one section of curve, its specifically ventilating duct from the 35% of original position axial length with straightway
(straightway is parallel with X-axis) it is horizontal-extending until and curve intersection, now import afflux section compare R with throat section diameter1/R2=
1.4, then curved section and straightway be fitted to the basic engineering curve of a ventilating duct, make the basic engineering curve of ventilating duct around
X-axis is rotated into housing, you can obtain arc-straight type aerofoil profile ventilating duct as shown in Figure 6, wind-guiding barrel thickness in this example
25mm, the leading edge point of wind turbine impeller blade are placed at the 35.5% of throat section straightway position.
Embodiment 4
The a diameter of 1130mm of wind turbine impeller in the present embodiment, 6 leaf of the number of blade, aerofoil profile ventilating duct designing airfoil basis are adopted
With the relevant parameter of NACA16.200 coordinate points of a molded line parameter in the aerofoil profile molded line of NACA16 are recalled (to ensure aerofoil profile
The accuracy of structure, can also adopt the coordinate points more than 200 quantity), after obtaining Curve of wing, by the coordinate of (20X, 25Y)
Conversion, obtains the basic engineering curvilinear coordinate point of target Curve of wing namely ventilating duct.Adjustment direction of a curve makes itself and X-direction
Parallel, because impeller diameter D is 1130mm, it is 10mm that blade tip clearance is installed in the present embodiment, therefore should ensure that the throat section of curve
Distance to X-axis isThe present embodiment is by upper shifting X-axis so as to above move 575+y (the y values for curve most
The y-coordinate of high point), it is ensured that the distance of the peak of curve to X-axis is 575mm (i.e. the y-coordinate of peak is -575mm), then
By Curve of wing in the X/Y plane 25 ° of rotate counterclockwise, its point of rotation is outlet diffuser distal point, now import afflux section with
Throat section diameter compares R1/R2=1.7, curve obtained is the basic engineering curve of ventilating duct, then makes the basic engineering of ventilating duct
Curve is rotated into housing around X-axis, you can obtain the aerofoil profile ventilating duct of the aerofoil profile anglec of rotation as shown in Figure 7, wind-guiding in this example
Barrel thickness 15mm, the leading edge point of wind turbine impeller blade are placed at the minimum throat's fragment position of diameter.
To sum up, this utility model is obtained according to design based on conventional wind-driven generator blade wing section, by amplifying different times
Several chord lengths and maximum gauge obtain corresponding molded line, or increase corresponding proportion when ensureing that maximum gauge is constant in the middle part of aerofoil profile
Straightway, resulting aerofoil profile are rotated into housing and are aerofoil profile ventilating duct, and which is according to the size of corresponding wind energy conversion system with required leaf top
Gap length, the aerofoil profile ventilating duct designed is processed according to the manufacture of wind energy conversion system related process, and inspection is qualified can input
Use.The aerofoil profile ventilating duct is the larger aerofoil profile molded line of lift-drag ratio because of reasonable and the adopted benchmark of structure, so can be efficient
The Wind energy extraction ability of wind energy conversion system is improved, improves surrounding Flow Field Distribution.And because design parameter can be according to required adjustment.So with
Wind energy conversion system is more matched.
As it will be easily appreciated by one skilled in the art that preferred embodiment of the present utility model is the foregoing is only, not
To limit this utility model, all any modifications made within spirit of the present utility model and principle, equivalent and change
Enter, should be included within protection domain of the present utility model.
Claims (9)
1. a kind of wind energy conversion system ventilating duct, it is characterised in that the ventilating duct is expanded using Jing based on the Curve of wing of airfoil structure
The target Curve of wing Jing Space Rotatings obtained after corresponding multiple are formed, and which includes import afflux section (1), the centre being sequentially connected
Throat section (2) and outlet diffuser (3), wherein, the import afflux section (1) corresponding to target Curve of wing meanline curvature compared with
Big one end, the outlet diffuser (3) is corresponding to the less one end of target Curve of wing meanline curvature, the middle throat
The maximum gauge of maximum gauge and outlet diffuser (3) of the minimum diameter of section (2) less than import afflux section (1).
2. wind energy conversion system ventilating duct as claimed in claim 1, it is characterised in that the minimum diameter of the middle throat section (2) with
The ratio of import afflux section (1) maximum gauge is preferably 1：1.2～4.
3. wind energy conversion system ventilating duct as claimed in claim 1 or 2, it is characterised in that the middle throat section (2) is straightway,
Which intercepts friendship to rear backward and goes out at 26%～35% position of axial direction by target Curve of wing from import afflux section (1)
At mouth diffuser, this section of camber line is changed into into straight line, and forms straight line Jing Space Rotatings.
4. wind energy conversion system ventilating duct as claimed in claim 3, it is characterised in that the middle throat section (2) is straightway, its by
A straight line is inserted in target Curve of wing, and forms straight line Jing Space Rotatings.
5. wind energy conversion system ventilating duct as claimed in claim 4, it is characterised in that the wind energy conversion system installation site is in straightway
At 35%～55% position.
6. wind energy conversion system ventilating duct as claimed in claim 5, it is characterised in that the length of the ventilating duct is preferably 0.8～3.5
The impeller diameter of wind energy conversion system again, thickness are preferably 2～25mm, and the installation blade tip clearance of the wind energy conversion system is preferably 5～30mm.
7. wind energy conversion system ventilating duct as claimed in claim 6, it is characterised in that the length of a straight line of the insertion is preferably
The axial length of 26%～40% target Curve of wing.
8. wind energy conversion system ventilating duct as claimed in claim 1, it is characterised in that the target Curve of wing is first around outlet diffuser
(3) distal point rotate to an angle after Jing Space Rotatings again.
9. wind energy conversion system ventilating duct as claimed in claim 8, it is characterised in that the angle of the target Curve of wing rotation is preferred
For ± 25 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621088829.2U CN206071794U (en) | 2016-09-28 | 2016-09-28 | A kind of wind energy conversion system ventilating duct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621088829.2U CN206071794U (en) | 2016-09-28 | 2016-09-28 | A kind of wind energy conversion system ventilating duct |
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| Publication Number | Publication Date |
|---|---|
| CN206071794U true CN206071794U (en) | 2017-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621088829.2U Active CN206071794U (en) | 2016-09-28 | 2016-09-28 | A kind of wind energy conversion system ventilating duct |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246459A (en) * | 2016-09-28 | 2016-12-21 | 华中科技大学 | A kind of wind energy conversion system ventilating duct |
| CN115738520A (en) * | 2022-11-09 | 2023-03-07 | 珠海格力电器股份有限公司 | Filter screen cleaning mechanism and clothes treatment device with same |
-
2016
- 2016-09-28 CN CN201621088829.2U patent/CN206071794U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106246459A (en) * | 2016-09-28 | 2016-12-21 | 华中科技大学 | A kind of wind energy conversion system ventilating duct |
| CN106246459B (en) * | 2016-09-28 | 2019-11-05 | 华中科技大学 | A kind of wind energy conversion system ventilating duct |
| CN115738520A (en) * | 2022-11-09 | 2023-03-07 | 珠海格力电器股份有限公司 | Filter screen cleaning mechanism and clothes treatment device with same |
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