CN109653944A - A kind of jet-propelled vertical axis windmill of leaf tail - Google Patents
A kind of jet-propelled vertical axis windmill of leaf tail Download PDFInfo
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- CN109653944A CN109653944A CN201811553249.XA CN201811553249A CN109653944A CN 109653944 A CN109653944 A CN 109653944A CN 201811553249 A CN201811553249 A CN 201811553249A CN 109653944 A CN109653944 A CN 109653944A
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- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
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Classifications
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- 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
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/06—Rotors
- F03D3/061—Rotors characterised by their aerodynamic shape, e.g. aerofoil profiles
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- 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
- F03D15/00—Transmission of mechanical power
- F03D15/05—Transmission of mechanical power using hollow exhausting 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
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/005—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor the axis being vertical
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- 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
- F03D3/00—Wind motors with rotation axis substantially perpendicular to the air flow entering the rotor
- F03D3/06—Rotors
- F03D3/062—Rotors characterised by their construction elements
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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
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Abstract
The present invention relates to wind power industry, especially a kind of jet-propelled vertical axis windmill of leaf tail.Including vertical axis, blade support bar and blade, the air jet pipe communicated is offered in the vertical axis and blade support bar, the blade is vertically equipped with several fumaroles to equipped with air flue, horizontal direction in parallel, the fumarole is set on the symmetrical central axes of blade, and lead to blade trailing edge, homogeneous intercommunicated, the formation flow channel of the air jet pipe, air flue, fumarole, air pump is equipped with outside the wind energy conversion system, the air jet pipe of the air outlet connection vertical axis of air pump, the fumarole through blade sprays high pressure draught from the bottom to top, forms jet-stream wind.The jet-propelled vertical axis windmill of leaf tail of the invention, jet-stream wind is generated by active control blade afterbody, form deboost, it does work to wind energy conversion system forward direction, wind energy conversion system lift resistance ratio is improved in wind energy conversion system range of operation, the power coefficient of wind energy conversion system is improved, and maintains generating efficiency in stable level.
Description
Technical field
The present invention relates to wind power industry, especially a kind of jet-propelled vertical axis windmill of leaf tail.
Background technique
Wind energy can improve China for a long time based on fire coal as a kind of abundant, environmental-friendly renewable and clean energy resource
Want the single energy resource structure of energy resource supply.According to the statistical report of Global Wind Energy Association (GWEC), 2016, due to the benefit of wind energy
With global CO2 discharge amount reduces 6,300,000,000 tons, and the accumulative wind energy installed capacity in the whole world in the past 20 years and the whole world increase blower dress newly every year
Machine capacity all obtains swift and violent growth.As modern Wind turbines are towards the trend development of larger capacity, Wind turbines are in big
Type development trend.
Wind-driven generator includes horizontal-shaft wind turbine and vertical axis windmill, the rotary shaft and the surface water of horizontal-shaft wind turbine
It is flat, usually have to wind apparatus, rotary shaft energy box haul changes and rotates.The rotary shaft of vertical axis windmill perpendicular to ground or
The direction of person's air-flow, without for horizontal-shaft wind turbine, not only making structure design letter to wind when change of the wind
Change, and decreases gyro power of the wind wheel to wind when.However, the hub height and root diameter of vertical axis windmill are limited to
The constraint of the various aspects such as wind machine structure, aerodynamic loading, control cabinet size, transport installation and blade material, no more than one
Fixed size.Therefore promoting wind energy conversion system torque and wind energy utilization to improve wind energy conversion system single machine efficiency is still large capacity modernism
The hot spot of the design of power machine and research.
Currently, can be mainly divided into active control and passive control for the flow control technique of wind energy conversion system separation and stall
Two major classes.Active control technology mainly has boundary layer blowing suction, plasma excitation, vibrating diaphragm etc., passive control technology
Mainly there are trailing edge, leading edge small column etc. before eddy generator, wing flap, surface crater, zigzag.These control methods all there is also
Some problems, not can solve in engineering that wind energy conversion system is under the atmospheric effect of different time and space scale, larger operating condition model
The flow separation and stall problem for enclosing generation, also need further to further investigate.
Application No. is 200910010823.1 patent of invention, discloses and a kind of improve the passive of vertical shaft wind mill performance
Jet method and device, the device include inlet duct and exhaust apparatus, when natural wind enter always windward, lower wind direction installation
Inlet duct, be then passed through hollow support rod, and from the propelling nozzle in exhaust apparatus or blade loaded on its outer end with
The opposite direction of wind energy conversion system rotation sprays, and generates the additional torque for pushing wind energy conversion system rotation, consumes extra power entirely without palpus.It should
Device belongs to passive control, and the torque of generation depends entirely on natural situation and weather conditions, can not be by the power train of wind energy conversion system
Number control not can guarantee continual and steady electric power output in stable level.
Tsing-Hua University Cao Shu good equal (mechanical engineering journal, 2011, Vol.47, No.10,113-118) is to ideal wind energy conversion system power
Coefficient is derived from, and ideal wind energy conversion system power coefficient is only related with wind energy conversion system maximum lift-drag ratio and tip speed ratio.When wind energy conversion system leaf
When tip-speed ratio and lift resistance ratio all tend to infinity, ideal wind energy conversion system power coefficient levels off to the Bates limit.Tip speed ratio is limited
In blade aerodynamic and inertial load and blade profile etc., cannot infinitely increase.Under the tip-speed ratio of given range, power coefficient
Increase with the lift resistance ratio of aerofoil profile and improves.
Summary of the invention
Against the above deficiency, the present invention provides a kind of jet-propelled vertical axis windmill of leaf tail, belong to active control type,
Propulsive thrust is generated to improve wind energy conversion system lift resistance ratio and torque by leaf tail jet, improves wind turbine power generation efficiency, and imitate power generation
Rate maintains in stable level.
The technical solution of the present invention is as follows:
A kind of jet-propelled vertical axis windmill of leaf tail, including vertical axis, blade support bar and blade, the vertical axis and leaf
The air jet pipe communicated is offered in piece support rod, the blade is vertically equipped with several jets to equipped with air flue, horizontal direction in parallel
Hole, the fumarole is set on the symmetrical central axes of blade, and leads to blade trailing edge, and the air jet pipe, air flue, fumarole are homogeneous
Intercommunicated, formation flow channel, the wind energy conversion system are equipped with air pump, the air jet pipe of the air outlet connection vertical axis of air pump, high pressure gas outside
The fumarole through blade sprays stream from the bottom to top, forms jet-stream wind.
The ratio of the momentum of impinging jet coefficient of the jet-stream wind, i.e. momentum of impinging jet and the free incoming flow mean momentum for flowing through aerofoil profile
Value is 0.005-0.06.
The exhibition of the jet-stream wind, along the height for arriving lowest level fumarole lower edge that is, on top layer's fumarole, is accounted for height h
The 80%-100% of blade whole height.
Add jet-stream wind in the whole service period of blade rotation.
The air flue and fumarole can be set on one or more blades.
Fumarole is arranged by setting air jet pipe and air flue inside vertical axis windmill, in blade afterbody in the present invention, in wind
Power machine external connection air pump, the gas of pressurization spray from bottom to top, from blade afterbody, form high speed jet-stream wind backward.Spray
Stream of emanating generates contrary thrust to blade, this thrust direction is directed toward leaf head, i.e., identical as the blade direction of motion, should
Thrust offsets with resistance portion suffered by blade, to reduce resistance suffered by blade, improves the lift resistance ratio of aerofoil profile.Due to injection
Hole is set on the symmetrical central axes of blade, therefore rotation half of the jet-stream wind direction also along the extended line direction of central axes, with blade
Diameter is perpendicular, this thrust forms torque in the rotary course of blade, does work to wind energy conversion system forward direction.Secondly as the height of tail portion
Fast jet-stream wind, so that air-flow and ideal are consistent without grain direction is separated at blade afterbody, extra band carrys out Coanda effect, carries leaf
Air-flow at tail increases " circular rector ", has certain inhibiting effect to the separation flowing of blade afterbody, reinforces flowing control effect,
To improve wind turbine power generation efficiency.
Detailed description of the invention
Fig. 1 is the jet-propelled vertical axis windmill perspective view of leaf tail of the present invention；
Fig. 2 is the jet-propelled vertical axis windmill top view of leaf tail of the present invention；
Fig. 3 is the jet-propelled vertical axis windmill elevational cross-sectional view of leaf tail of the present invention；
Fig. 4 is blade perspective view of the present invention；
Fig. 5 is leaf tail jet-stream wind enlarged drawing of the present invention；
Fig. 6 is that the effect that blade of the present invention is subject to is tried hard to；
Fig. 7 is the power coefficient of existing vertical axis windmill and the jet-propelled vertical axis windmill of leaf tail of the present invention with tip-speed ratio
Change comparison diagram；
Fig. 8 is the power coefficient and momentum of impinging jet Relationship of Coefficients curve graph of the jet-propelled vertical axis windmill of leaf tail of the present invention.
Specific embodiment
It is described further below with reference to technical effect of the attached drawing to design of the invention, specific structure and generation, with
It is fully understood from the purpose of the present invention, feature and effect.
With reference to Fig. 1-Fig. 5, the jet-propelled vertical axis windmill of leaf tail of the invention, including vertical axis 10, blade support bar 20
With blade 30, offer the air jet pipe 11 communicated in vertical axis 10 and blade support bar 20, blade 30 vertically to be equipped with air flue 31,
Horizontal direction is equipped with several fumaroles 32 in parallel, and fumarole 32 is set on the symmetrical central axes of blade 30, and leads to 30 tail of blade
Edge, homogeneous intercommunicated, the formation flow channel of air jet pipe 11, air flue 31, fumarole 32.It is equipped with air pump 40 outside wind energy conversion system, air pump 40
Air outlet connect vertical axis 10 air jet pipe 11, air pump 40 generate high pressure draught from the bottom to top the air flue 31 through blade 30, from
Fumarole 32 sprays, and forms jet-stream wind 33.Air flue 31 and fumarole 32 can be set on one or more blades 30, in this implementation
In example, three blades 30 are equipped with air flue 31 and fumarole 32.
Left arrow is wind-force direction W, and horizontally to the right, wind energy conversion system direction of rotation R is counterclockwise.Since high speed is sprayed
33 bring Coanda effect of air-flow, the exhibition of jet-stream wind 33 is to height h, i.e., lowest level fumarole is arrived on edge on top layer's fumarole 32
The height of 32 lower edges should consider the structure of practical air flue 31 and fumarole 32 as close possible to the integral blade height of wind energy conversion system,
Open up the 80%-100% that 30 whole height of blade is accounted for height h.According to the blade 30 of vertical axis windmill at each phase angle
Flow field situation adds jet-stream wind 33 in the whole service period that blade 30 rotates, can also according to the actual situation, to blade 30 one
Add jet-stream wind 33 in phase bit angular region, to reach optimal control effect.
As shown in fig. 6, at the focus point O of blade 30, wind-force is formed by resistance D, and rotation before applying jet-stream wind 33
The resultant force for turning lift L is F, and the direction of motion of direction and blade 30 is on the contrary, torque suffered by blade 30 is at the phase angle
It is negative, do negative work.After applying jet-stream wind 33, due to the thrust F for the opposite direction that jet-stream wind 33 generatesj, F and FjResultant force be F ',
The power is identical as 30 direction of motion of blade, and torque suffered by blade 30 is made to become just, doing positive work.
With reference to Fig. 7, in order to verify effect of the invention, inventor to not plus jet-propelled existing vertical axis windmill and this
The jet-propelled vertical axis windmill of the leaf tail of invention has carried out numerical simulation, vertical axis windmill parameter for simulating such as 1 institute of table
Show:
Table 1:
Tip speed ratio is the ratio between pneumatic equipment bladess tip linear velocity and wind speed, is the important ginseng for stating wind mill performance
Number.As shown in fig. 7, passing through the wind energy conversion system power coefficient that contrast number is simulated, it can be seen that wind energy conversion system after adding jet-stream wind with
Not plus the wind energy conversion system of jet-stream wind is compared, and when tip speed ratio is 1.44, power coefficient increases 75%, in optimum tip-speed ratio
When 2.64, power coefficient increases 22%.
To guarantee that jet-stream wind 33 can produce enough thrust, while avoiding spraying gas during from air pump 40 to fumarole 32
The loss of stream 33 is excessive, and the ratio of momentum of impinging jet coefficient, i.e. momentum of impinging jet and the free incoming flow mean momentum for flowing through aerofoil profile is
0.005-0.06.The calculation formula of momentum of impinging jet coefficient is as follows:
WhereinFor jet quality flow, VjFor effluxvelocity, ρ∞And V∞Freely to come current density and speed, S is wind energy conversion system
Area of passage.
Momentum of impinging jet coefficient needs value range appropriate, and momentum coefficient is too small, and jet-stream wind 33 is to wind energy conversion system and wind
The effect of power machine flow field is too small, fails to offset resistance brought by wind-force, enough positive effects cannot not be brought to wind energy conversion system, and not
Add the wind energy conversion system power coefficient gap of jet stream too small.And momentum of impinging jet coefficient is too big, jet stream energy consumption is excessive, with effluxvelocity
It further increases, jet stream stream field and the increase for being less than jet stream energy consumption to the positive acting of wind energy conversion system thrust, so that large stream is dynamic
Coefficient of discharge apparatus for lower wind machine power coefficient declines instead.
Fig. 8 is when tip speed ratio is 2.64, and the power coefficient of the jet-propelled vertical axis windmill of leaf tail of the invention is with penetrating
Amount of flow index variation profiles figure, the specific value of key point are as shown in table 2.It can be seen that when momentum of impinging jet coefficient is in 0-
When in 0.005 interval range, for momentum of impinging jet coefficient less than 0.441, power coefficient numerical value increase is smaller.When momentum of impinging jet coefficient exists
When in 0.005-0.06 interval range, power coefficient increases with the increase of momentum of impinging jet coefficient, and is in higher level.When
When momentum of impinging jet coefficient is more than 0.06, power coefficient is declined instead by increased influence of consuming energy.Therefore, momentum of impinging jet coefficient
It maintains in 0.005-0.06 interval range, the power coefficient that can reach more satisfactory is horizontal.
Table 2:
| Momentum of impinging jet coefficient | 0.002 | 0.003 | 0.005 | 0.01 | 0.03 | 0.05 | 0.06 | 0.08 |
| Power coefficient | 0.42 | 0.435 | 0.441 | 0.46 | 0.488 | 0.498 | 0.505 | 0.5 |
As it can be seen that the jet-propelled vertical axis windmill of leaf tail of the invention, generates jet-stream wind by active control blade afterbody,
Deboost is formed, is done work to wind energy conversion system forward direction, wind energy conversion system lift resistance ratio is improved in wind energy conversion system range of operation, improves wind energy conversion system
Power coefficient, and maintain generating efficiency in stable level.
Disclosed above is only the embodiment of the present invention, and still, the present invention is not limited to this, the technology of any this field
What personnel can think variation should all fall into protection scope of the present invention.
Claims (5)
1. a kind of jet-propelled vertical axis windmill of leaf tail, including vertical axis (10), blade support bar (20) and blade (30), special
Sign is, the air jet pipe (11) communicated is offered in the vertical axis (10) and blade support bar (20), and the blade (30) is hung down
It is directly equipped with several fumaroles (32) in parallel to equipped with air flue (31), horizontal direction, the fumarole (32) is set to blade (30)
On symmetrical central axes, and lead to blade (30) trailing edge, the air jet pipe (11), air flue (31), fumarole (32) it is homogeneous it is intercommunicated,
Flow channel is formed, is equipped with air pump (40) outside the wind energy conversion system, the air jet pipe of air outlet connection vertical axis (10) of air pump (40)
(11), fumarole (32) of the high pressure draught from the bottom to top through blade (30) sprays, and is formed jet-stream wind (33).
2. vertical axis windmill according to claim 1, which is characterized in that the momentum of impinging jet system of the jet-stream wind (33)
The ratio of number, i.e. momentum of impinging jet and the free incoming flow mean momentum for flowing through aerofoil profile is 0.005-0.06.
3. vertical axis windmill according to claim 1, which is characterized in that the exhibition of the jet-stream wind (33) to height h,
Along the height for arriving lowest level fumarole (32) lower edge i.e. on top layer's fumarole (32), the 80%- of blade (30) whole height is accounted for
100%.
4. vertical axis windmill according to claim 1, which is characterized in that in the whole service period of blade (30) rotation
Add jet-stream wind (33).
5. vertical axis windmill according to claim 1, which is characterized in that the air flue (31) and fumarole (32) can be set
In on one or more blades (30).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318944A (en) * | 2019-08-01 | 2019-10-11 | 沈阳航空航天大学 | A kind of jet-propelled blade of vertical axis wind turbine of synthesizing jet-flow |
| CN111852754A (en) * | 2020-07-24 | 2020-10-30 | 四川大学 | Air-compression jet type self-starting vertical axis wind turbine and detection method thereof |
| CN114504787A (en) * | 2022-03-03 | 2022-05-17 | 西北民族大学 | Football exercise device is used in sports teaching that can simulate football orbit |
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| CN110318944A (en) * | 2019-08-01 | 2019-10-11 | 沈阳航空航天大学 | A kind of jet-propelled blade of vertical axis wind turbine of synthesizing jet-flow |
| CN111852754A (en) * | 2020-07-24 | 2020-10-30 | 四川大学 | Air-compression jet type self-starting vertical axis wind turbine and detection method thereof |
| CN114504787A (en) * | 2022-03-03 | 2022-05-17 | 西北民族大学 | Football exercise device is used in sports teaching that can simulate football orbit |
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Application publication date: 20190419 |