CN105840415A - Wind turbine blade and vortex generator mounting bars used in the wind turbine blade - Google Patents
Wind turbine blade and vortex generator mounting bars used in the wind turbine blade Download PDFInfo
- Publication number
- CN105840415A CN105840415A CN201610403607.3A CN201610403607A CN105840415A CN 105840415 A CN105840415 A CN 105840415A CN 201610403607 A CN201610403607 A CN 201610403607A CN 105840415 A CN105840415 A CN 105840415A
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- China
- Prior art keywords
- vortex generator
- vortex
- wind speed
- mounting bar
- flow separation
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000926 separation method Methods 0.000 claims abstract description 28
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 30
- 238000004026 adhesive bonding Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000010354 integration Effects 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 description 11
- 238000009434 installation Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/0608—Rotors characterised by their aerodynamic shape
- F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
-
- 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
Abstract
The invention relates to a wind turbine blade and vortex generator mounting bars used in the wind turbine blade. The blade comprises a blade body, and is characterized in that a plurality of vortex generator mounting bars are disposed on the blade body along a flow separation start line on the low wind speed suction surface by end-to-end connection; each vortex generator mounting bar comprises a base and n pairs of vortex generators disposed on the base, n is a positive integer; each pair of vortex generators includes two triangle shaped vortex generator sheet bodies; the rear edge of each vortex generator mounting bar is fit to the flow separation line under a low wind speed; and all the vortex generator mounting bars are positioned in the area between the flow separation start line on the low wind speed suction surface and the flow separation start line on the high wind speed suction surface. The blade and the mounting bars disclosed by the invention can improve the generation power of a stall wind turbine under low wind speed; while under high wind speed, the vortex generators do not work to prevent the stall wind turbine from generation overload, i.e., prevent the generation power from exceeding the rated power of the generator to cause the unit to shut down.
Description
Technical field
The present invention relates to a kind of pneumatic equipment blades and the vortex generator mounting bar for pneumatic equipment blades, belong to pneumatic equipment blades pneumatics field.
Background technology
Pneumatic equipment blades is the core work parts of wind energy conversion system, and wind energy conversion system output electric energy is exactly based on pneumatic equipment blades and obtains from ventilating air, i.e. wind energy-mechanical energy-electric energy.Thus pneumatic equipment blades captures the size of wind energy from air and exported by the energy being directly connected to self, embodiment the most intuitively is exactly the Cp value of wind energy conversion system, i.e. power coefficient.The aerodynamic characteristic of pneumatic equipment blades directly affects the Cp value of blade.
During wind energy conversion system runs, root or major part leaf exhibition scope at blade are likely to flow separation, affect the capture rate of wind energy conversion system.Vortex generator (Vortex Generators, VGs) is a kind of effective ways controlling flow separation.For aerodynamic principle, after blade installs VGs additional, the high energy fluid of the low-yield fluid in blades flows boundary region with outer layer is blended, be equivalent in boundary region, be filled with new eddy current energy, keep the full of boundary layer velocity type, thus reach increase whirlpool induced lift and delay, stop the purpose separated, enable blade to keep preferable lift efficiency, increase the power output of wind wheel.
At present to installing the patent of invention of vortex generator raising change paddle type wind energy conversion system Cp value additional much, but actually rare for the improved design project of early stage Stall Type blower fan in domestic wind field.But China's wind field still has substantial amounts of early stage Stall Type blower fan to be currently running, for these Stall Type blower fans, improve maximum Cp value effect the most little.It is in full hair-like state when Stall Type blower fan is under the wind speed reaching maximum Cp value correspondence, then has improved Cp value and can not improve the output of wind energy conversion system, be easily caused motor overload on the contrary and shut down, thus reduce the economy of blower fan.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art; a kind of pneumatic equipment blades and the vortex generator mounting bar for pneumatic equipment blades are provided; improve Stall Type blower fan generated output at low wind speeds; and vortex generator is inoperative under big wind speed; to prevent Stall Type blower fan from issuing electricity overload at big wind speed; exceed motor rated power, cause compressor emergency shutdown.
The technical scheme provided according to the present invention, described pneumatic equipment blades, including blade body, it is characterized in that: arranging vortex generator mounting bar along low wind speed suction surface flow separation start line in described blade body, described vortex generator mounting bar is a plurality of end to end；Every vortex generator mounting bar includes pedestal with the n being arranged on pedestal to vortex generator, and n is positive integer.
Further, the every pair of vortex generator includes the vortex generator lamellar body of two lamellars triangular in shape.
Further, the height of described vortex generator lamellar body be H, H=δ, δ be the boundary-layer height on blade body surface；The a length of 3.6H of described vortex generator lamellar body；The angle of attack of two vortex generator lamellar bodies of every pair of vortex generator is 15～16 °；The distance that two vortex generator lamellar bodies of every pair of vortex generator are most advanced and sophisticated is 2H, and the distance that adjacent two vortex generator lamellar bodies of adjacent two pairs of vortex generators are most advanced and sophisticated is 5H.
Further, the thickness of described pedestal is 0.04 δ, and the total length of pedestal is 5 × 7H, and width is 5H.
Further, the flow separation line under the trailing edge line low wind speed of laminating of described vortex generator mounting bar.
Further, whole swirler mounting bar is in the region between low wind speed suction surface flow separation start line and big wind speed suction surface flow separation start line.
Further, described pedestal and vortex generator use integration to manufacture.
Further, described vortex generator mounting bar uses gluing being connected in blade body.
Described vortex generator mounting bar, is characterized in that: including pedestal with the n being arranged on pedestal to vortex generator, n is positive integer；Every pair of vortex generator includes the vortex generator lamellar body of two lamellars triangular in shape.
Further, the height of described vortex generator lamellar body be H, H=δ, δ be the boundary-layer height on blade body surface；The a length of 3.6H of described vortex generator lamellar body；The angle of attack of two vortex generator lamellar bodies of every pair of vortex generator is 15～16 °；The distance that two vortex generator lamellar bodies of every pair of vortex generator are most advanced and sophisticated is 2H, and the distance that adjacent two vortex generator lamellar bodies of adjacent two pairs of vortex generators are most advanced and sophisticated is 5H；The thickness of described pedestal is 0.04 δ, and the total length of pedestal is 5 × 7H, and width is 5H.
The invention have the advantages that (1) present invention can reduce the Stall Type blower fan flow separation regions at low wind speed, improve Stall Type blower fan at low wind speed at the generated energy run；(2) present invention uses vortex generator, postpones the flow separation of suction surface of wind turbine blade, reduces separating area, increases the torque of blade, thus improves the generated energy of wind energy conversion system；(3) structurally use gluing mode to be installed on blade, blade construction itself is not required, such that it is able to the wind energy conversion system of old wind field is reequiped, increase economic efficiency；(4) for the Wind turbine installed and generated electricity at present, the vortex generator design that the present invention proposes can carry out installing vortex generator additional, gluing mode is used to be installed on blade, blade construction itself is not required, such that it is able to the wind energy conversion system of old wind field is reequiped, improve the output of wind energy conversion system, bring more preferable economic benefit.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the flow separation start line under two kinds of wind speed of leaf model suction surface.
Fig. 2 is the schematic diagram of the pneumatic equipment blades in true application.
Fig. 3 is the partial enlarged drawing of Fig. 2.
Fig. 4 is the schematic diagram of vortex generator mounting bar.
Detailed description of the invention
Below in conjunction with concrete accompanying drawing, the invention will be further described.
First set up 3D model, then grid division according to actual wind field turbines vane, in conjunction with wind field mean wind speed and blower fan rated wind speed, carry out CFD analog simulation, simulation result is processed, draw the mobility status of blade suction surface.
Mobility status according to suction surface, mark off flow separation regions and non-current separated region, it is the start line of flow separation at its intersection, as shown in Figure 1, lines 1 are blower fan wind wheel blade suction surface flow separation start line, wind wheel blade suction surface flow separation start line when lines 2 operate at low wind speeds for blower fan when operating under big wind speed.The start line of flow separation is not straight line as shown in Figure 1 under normal circumstances, is intended merely to Practical Project situation, is reduced to straight line, it is simple to install in blade surface line.
Simultaneously, simulation result can draw, at the height δ separating intersection blade surface boundary-layer, typically it is distributed by the speed shape of some blade surfaces near checking, substantially can draw the magnitude of boundary-layer height, thus determine the height of vortex generator, because the mechanism of action of vortex generator is to be blended into the high-energy fluid outside boundary region the low energy region of inside boundary, be equivalent to inject new eddy current energy to inside boundary, thus inhibit flow separation.
Boundary-layer height δ according to computation and measurement, determines that the height H of vortex generator, incorporation engineering practical situation and manufacturing situation are accepted or rejected, and both height values are in same order magnitude range, it is proposed that the height H ≈ δ of vortex generator.
Calculate according to substantial amounts of numerical simulation and optimize, set a length of 3.6H of vortex generator, (angle of attack is self direction of vortex generator sheet and the angle carrying out flow path direction for angle of attack β=15 of vortex generator～16 °, as shown in Figure 4), and two is a pair, positive and negative 15～16 ° of angles of attack, spacing be 2H, with vortex generator head cusp measure.And with 7H distance as periodic arrangement, the five pairs of vortex generators install band as one, compare the installation of independent a pair vortex generator, workload when installing on fan blade can be alleviated in the way of band forms installing.
Preferably grinding process is carried out in the blade surface area installed during installation, the unit installed after all is the unit having been put into running, and the roughness of blade surface, attachment all can affect the installation of vortex generator bar, use 3M glue adhesive means during installation, basic 24h is the most curable, firmly.
Even if blade surface occurs the situation such as setup error or loss when installing vortex generator bar, use the mounting bar of integral forming can also replace polishing the most easily, can also conveniently replace including the maintenance with rear fan unit or dismantle.
For wind field with annual mean wind speed 7.5m/s, Stall Type blower fan unit installs vortex generator additional compared with the unit not installing vortex generator, and peak power output can improve about 2% to 3%.
Specifically, as shown in Figure 2 and Figure 3, pneumatic equipment blades of the present invention, including blade body 10, blade body 10 arranges vortex generator mounting bar 20 along low wind speed suction surface flow separation start line, to delay the flow separation of blade surface, the flow separation line under the trailing edge line low wind speed of laminating of vortex generator mounting bar 20, and guarantee the region that whole swirler mounting bar 20 is between low wind speed suction surface flow separation start line and big wind speed suction surface flow separation start line；Described vortex generator mounting bar 20 is a plurality of end to end, and as shown in Figure 4, every vortex generator mounting bar 20 includes pedestal 21 with the n being arranged on pedestal 21 to vortex generator 22, and n is positive integer (in Fig. 4, n is 5)；Described pedestal 21 and vortex generator 22 use integration manufacture, and material is engineering plastics or metal, it is simple to manufactures and installs.As shown in Figure 4, every pair of vortex generator 22 includes the vortex generator lamellar body of two lamellars triangular in shape, and the height 3 of vortex generator lamellar body is the boundary-layer height δ on H, H=blade body 10 surface, and the length 4 of vortex generator lamellar body is 3.6H；The angle of attack 5 of two vortex generator lamellar bodies of every pair of vortex generator 22 is 15～16 ° (preferably 16 °)；Distance 8=2H at two vortex generator lamellar bodies tips of every pair of vortex generator 22, distance 9=5H at adjacent two vortex generator lamellar bodies tip of adjacent two pairs of vortex generators 22.The thickness of described pedestal 21 is 0.04 δ, and the total length 6 of pedestal 21 is 5 × 7H, and width 7 is 5H.
Claims (10)
1. a pneumatic equipment blades, including blade body (10), it is characterized in that: arranging vortex generator mounting bar (20) along low wind speed suction surface flow separation start line in described blade body (10), described vortex generator mounting bar (20) is a plurality of end to end；Every vortex generator mounting bar (20) include pedestal (21) and the n that is arranged on pedestal (21) to vortex generator (22), n is positive integer.
2. pneumatic equipment blades as claimed in claim 1, is characterized in that: every pair of vortex generator (22) includes the vortex generator lamellar body of two lamellars triangular in shape.
3. pneumatic equipment blades as claimed in claim 2, is characterized in that: the height of described vortex generator lamellar body be H, H=δ, δ be the boundary-layer height on blade body (10) surface；The a length of 3.6H of described vortex generator lamellar body；The angle of attack of two vortex generator lamellar bodies of every pair of vortex generator (22) is 15～16 °；The distance that two vortex generator lamellar bodies of every pair of vortex generator (22) are most advanced and sophisticated is 2H, and the distance that adjacent two vortex generator lamellar bodies of adjacent two pairs of vortex generators (22) are most advanced and sophisticated is 5H.
4. pneumatic equipment blades as claimed in claim 3, is characterized in that: the thickness of described pedestal (21) is 0.04 δ, and the total length of pedestal (21) is 5 × 7H, and width is 5H.
5. pneumatic equipment blades as claimed in claim 1, is characterized in that: the flow separation line under the trailing edge line low wind speed of laminating of described vortex generator mounting bar (20).
6. pneumatic equipment blades as claimed in claim 1, is characterized in that: whole swirler mounting bar (20) is in the region between low wind speed suction surface flow separation start line and big wind speed suction surface flow separation start line.
7. pneumatic equipment blades as claimed in claim 1, is characterized in that: described pedestal (21) and vortex generator (22) use integration to manufacture.
8. pneumatic equipment blades as claimed in claim 1, is characterized in that: described vortex generator mounting bar (20) uses gluing being connected in blade body (10).
9. a vortex generator mounting bar, is characterized in that: include pedestal (21) and the n that is arranged on pedestal (21) to vortex generator (22), n is positive integer；Every pair of vortex generator (22) includes the vortex generator lamellar body of two lamellars triangular in shape.
10. vortex generator mounting bar as claimed in claim 9, is characterized in that: the height of described vortex generator lamellar body be H, H=δ, δ be the boundary-layer height on blade body (10) surface；The a length of 3.6H of described vortex generator lamellar body；The angle of attack of two vortex generator lamellar bodies of every pair of vortex generator (22) is 15～16 °；The distance that two vortex generator lamellar bodies of every pair of vortex generator (22) are most advanced and sophisticated is 2H, and the distance that adjacent two vortex generator lamellar bodies of adjacent two pairs of vortex generators (22) are most advanced and sophisticated is 5H；The thickness of described pedestal (21) is 0.04 δ, and the total length of pedestal (21) is 5 × 7H, and width is 5H.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610403607.3A CN105840415A (en) | 2016-06-08 | 2016-06-08 | Wind turbine blade and vortex generator mounting bars used in the wind turbine blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610403607.3A CN105840415A (en) | 2016-06-08 | 2016-06-08 | Wind turbine blade and vortex generator mounting bars used in the wind turbine blade |
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| Publication Number | Publication Date |
|---|---|
| CN105840415A true CN105840415A (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610403607.3A Pending CN105840415A (en) | 2016-06-08 | 2016-06-08 | Wind turbine blade and vortex generator mounting bars used in the wind turbine blade |
Country Status (1)
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|---|---|
| CN (1) | CN105840415A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108131240A (en) * | 2018-01-30 | 2018-06-08 | 华润新能源（临武）风能有限公司 | A kind of fan blade remodeling method |
| CN108626069A (en) * | 2017-03-24 | 2018-10-09 | 株洲时代新材料科技股份有限公司 | A kind of wind electricity blade |
| CN110285013A (en) * | 2019-06-24 | 2019-09-27 | 沈阳航空航天大学 | A method of it utilizes and is vortexed axis wind energy conversion system wind energy utilization efficiency of improving the standard |
| CN112253391A (en) * | 2020-10-30 | 2021-01-22 | 上海电气风电集团股份有限公司 | Air flow control device, fan blade comprising same and wind generating set |
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|---|---|---|---|---|
| US20110250076A1 (en) * | 2008-12-12 | 2011-10-13 | Lm Glasfiber A/S | Wind turbine blade having a spoiler with effective separation of airflow |
| CN103987622A (en) * | 2011-07-22 | 2014-08-13 | Lmwp专利控股有限公司 | Wind turbine blade comprising vortex generators |
| CN205744282U (en) * | 2016-06-08 | 2016-11-30 | 无锡风电设计研究院有限公司 | Pneumatic equipment blades and the vortex generator mounting bar for pneumatic equipment blades |
-
2016
- 2016-06-08 CN CN201610403607.3A patent/CN105840415A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110250076A1 (en) * | 2008-12-12 | 2011-10-13 | Lm Glasfiber A/S | Wind turbine blade having a spoiler with effective separation of airflow |
| CN103987622A (en) * | 2011-07-22 | 2014-08-13 | Lmwp专利控股有限公司 | Wind turbine blade comprising vortex generators |
| CN205744282U (en) * | 2016-06-08 | 2016-11-30 | 无锡风电设计研究院有限公司 | Pneumatic equipment blades and the vortex generator mounting bar for pneumatic equipment blades |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108626069A (en) * | 2017-03-24 | 2018-10-09 | 株洲时代新材料科技股份有限公司 | A kind of wind electricity blade |
| CN108626069B (en) * | 2017-03-24 | 2020-12-29 | 株洲时代新材料科技股份有限公司 | Wind power blade |
| CN108131240A (en) * | 2018-01-30 | 2018-06-08 | 华润新能源（临武）风能有限公司 | A kind of fan blade remodeling method |
| CN110285013A (en) * | 2019-06-24 | 2019-09-27 | 沈阳航空航天大学 | A method of it utilizes and is vortexed axis wind energy conversion system wind energy utilization efficiency of improving the standard |
| CN110285013B (en) * | 2019-06-24 | 2020-10-23 | 沈阳航空航天大学 | Method for improving wind energy utilization efficiency of horizontal axis wind turbine by using eddy current |
| CN112253391A (en) * | 2020-10-30 | 2021-01-22 | 上海电气风电集团股份有限公司 | Air flow control device, fan blade comprising same and wind generating set |
| CN112253391B (en) * | 2020-10-30 | 2022-02-01 | 上海电气风电集团股份有限公司 | Air flow control device, fan blade comprising same and wind generating set |
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Application publication date: 20160810 |
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