CN206571627U - A kind of reverse united jet flow control device for pneumatic equipment bladess aerodynamic brake - Google Patents
A kind of reverse united jet flow control device for pneumatic equipment bladess aerodynamic brake Download PDFInfo
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- CN206571627U CN206571627U CN201720135110.8U CN201720135110U CN206571627U CN 206571627 U CN206571627 U CN 206571627U CN 201720135110 U CN201720135110 U CN 201720135110U CN 206571627 U CN206571627 U CN 206571627U
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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 kind of reverse united jet flow control device for pneumatic equipment bladess aerodynamic brake, reverse united jet flow control device is equipped with each blade, the cross-section structure of the reverse united jet flow control device of blade is divided into plenum chamber and low-pressure chamber's two parts, plenum chamber is communicated with trailing edge puff prot, and low-pressure chamber communicates with leading edge air entry；Along the plenum chamber formation high pressure draught passage of direction blade, high pressure draught passage is connected via blade propeller hub with air pump one end in cabin；Low-pressure air current passage is formed along the low-pressure chamber of direction blade, low-pressure air current passage is connected via propeller hub with the air pump other end in cabin；Trailing edge puff prot is located at away from aerofoil profile leading edge 80%c positions, and jet open height is 1.38%c, and leading edge air entry is located at away from aerofoil profile leading edge 6%c positions, and suction inlet is highly 0.65%c, and wherein c represents aerofoil profile chord length.The utility model uses reverse united jet flow, can reach the effect of aerodynamic brake.
Description
Technical field
The utility model is related to active Flow Control technical field, and in particular to one kind is used for pneumatic equipment bladess aerodynamic brake
Reverse united jet flow control device.
Background technology
The energy is the necessary material basis of human civilization progress, economic development.With continuing to develop for human society, tradition
Resource such as coal, oil, natural gas etc. are constantly consumed up to exhaustion, and the excess emissions of fossil fuel can influence global gas
Wait, destroy the ecological balance.Therefore, regenerative resource receives increasing attention in the energy strategy of countries in the world.
In numerous regenerative resources, wind energy with its cleanliness without any pollution, floor space it is relatively small, independent of extra power, without fuel
The huge superiority such as price risk, cost of electricity-generating are stable, global range is widely distributed and development potentiality and by the green grass or young crops of people
Look at, wind energy power technology is also increasingly by the concern and investment of many companies in the world.
The working environment of wind power generating set is more severe, in wind speed changeable season, and unit may need frequent shutdown,
Prevent wind wheel stall or the excessive destruction for causing wind power generating set of pneumatic torque.In addition, when overhauling unit, it is also desirable to make wind
Impeller blade is in braking state, to prevent personnel's injury and unit from destroying.Therefore, brake system is the critical component of wind energy conversion system,
It is the important step of unit safety guarantee and stable operation.Traditional wind energy conversion system is typically using two sets of brake system, i.e. blade tip
Pneumatic braking system and the mechanical brake system being arranged on main shaft, the stopping process of whole wind energy conversion system is in two systems
Carried out under coordinative role.
Wherein mechanical brake system is mostly installed on high speed shaft or slow-speed shaft, is cut both ways.When on high speed shaft,
Its brake torque is small, and brake system is easily installed, but gear-box may often overload, dynamic load to gear-box impact compared with
Greatly, gear-box destruction is easily caused.Especially winter wind speed is higher, and wind energy conversion system many times has to take emergency brake, this
In the case of easily gear-box, blade and brake system are caused it is " fatal " injury.To reduce the impact of gear-box, it is to avoid gear-box
The load that is hit is damaged, and brake can be arranged on slow-speed shaft, such skidding torque basic role is stopped on slow-speed shaft
The brake load produced during car will not be acted on gear-box.But so it is accomplished by very big brake torque, required brake
The size of lock is also larger, can be had any problem installing, while larger brake torque is proposed to the sealing of hydraulic system again
Higher requirement.In current Wind turbine, most of mechanical brake is arranged on high speed shaft, therefore key issue is blower fan system
How load impact to gear-box is reduced when dynamic.
The air force brake of blade tip flow spoiler form, is generally used in current fixed pitch wind power generating set design
A kind of brake form.When wind power generating set is in running status, blade tip flow spoiler plays absorption as a part for blade
Hydraulic system in the effect of wind energy, wind power generating set can make it keep this state.The hydraulic oil that hydraulic system is provided leads to
Cross swivel joint and enter the hydraulic cylinder for being arranged on propeller shank, promote the spring in piston rod, compression blade tip flow spoiler mechanism, make
Blade tip flow spoiler is joined together with blade main body.When wind-driven generator needs to shut down, hydraulic system release hydraulic oil, blade tip is disturbed
Flow device under the action of the centrifugal force, turn over 90 ° by the track of design, as damping sheet, braking action is played under air drag.Become oar
Air force brake away from wind-driven generator is realized by the change of the blade angle of attack.But when the pressure of hydraulic system increases
When, the sealing property requirement of whole hydraulic system is just high, and the possibility of oil leak can also increase.
With the increase of wind-driven generator pool-size, the torque on main shaft is increased exponentially, and in wind energy conversion system brake process
In, transmission system subjects very big moment of torsion, and influence of the mechanical brake torque to gear-box is maximum.According to statistics, occur most frequently
Failure is electrical malfunction, and main downtime is caused by gearbox fault, and wind energy conversion system size is bigger, and failure-frequency is got over
It is high.The gear-box of wind energy conversion system often works under rugged environment, and its spoilage is very high, changes gear-box workload very
Greatly, therefore and the loss that causes also can not look down upon, many wind-powered electricity generation producers begin one's study how to reduce because gearbox fault and
The shutdown caused.
In view of the hydraulic system required for traditional blade tip flow spoiler adds wind power generating set complexity and general biography
There are the problems such as the leakage of high pressure liquid force feed, gear-box are impacted, brake block heating abrasion is big in system hydraulic machinery brake, at present,
Have some optimizing design schemes for being directed to wind turbine brake system, such as flexible brake technique, electromagnetic eddy current brake technology etc.,
Although being improved to some extent than traditional, pneumatic brake and mechanical brake method, there are still inefficient or effect is limited not
Foot.Therefore, further the wind energy conversion system brake method of research high efficient and reliable has critically important meaning for lifting wind-power electricity generation level
Justice.
Utility model content
To solve the above problems, the utility model is penetrated there is provided a kind of for reversely combining for pneumatic equipment bladess aerodynamic brake
Flow control device, using reverse united jet flow, to reduce blade lift, increase blade drag, so as to reach the effect of aerodynamic brake
Really.
To achieve the above object, the technical scheme that the utility model is taken is：
It is equipped with a kind of reverse united jet flow control device for pneumatic equipment bladess aerodynamic brake, each blade reversely
United jet flow control device, the cross-section structure of the reverse united jet flow control device of blade is divided into plenum chamber and low-pressure chamber
Two parts, plenum chamber is communicated with trailing edge puff prot, and low-pressure chamber communicates with leading edge air entry；Along the high pressure gas of direction blade
Room forms high pressure draught passage, and high pressure draught passage is connected via blade propeller hub with air pump one end in cabin；Along blade
The low-pressure chamber in direction forms low-pressure air current passage, and low-pressure air current passage is connected via propeller hub with the air pump other end in cabin
It is logical；Under reverse united jet flow mode of operation, air pump work produces pressure difference, gases at high pressure are via high pressure draught passage at two ends
The trailing edge plenum chamber in blade is transported to, is then sprayed by trailing edge spout；Air-flow near blade inlet edge is then in leading edge
In the presence of low-pressure chamber and air entry, low-pressure chamber is flowed into by leading edge suction inlet, then it is defeated via propeller hub by low-pressure air current passage
It is sent to the low-pressure end of air pump；Trailing edge puff prot is located at away from aerofoil profile leading edge 80%c positions, and jet open height is 1.38%c, leading edge
Air entry is located at away from aerofoil profile leading edge 6%c positions, and suction inlet is highly 0.65%c, and wherein c represents aerofoil profile chord length.
Wherein, the reverse united jet flow control device is opened up to continuous or discrete distribution along blade.
The utility model has the advantages that：
Reverse united jet flow flow control method is more efficient used in the utility model.In tradition machinery brake system
On the basis of, it can at least reach following three points effect by increasing reverse united jet flow flow control technique：(1) needing to shut down
When, suitable momentum of impinging jet coefficient can be matched according to extraneous different wind field environment and carries out aerodynamic brake, then cooperative mechanical
Brake, so as to reach the purpose of fast braking, substantially increases braking efficiency；(2) because reverse united jet flow control technology has
Liter increasing that subtracts for having highly significant hinders effect and promotes separating capacity, and traditional mechanical braking force is effectively replaced using aerodynamic drag,
The problems such as the mechanical oscillation brought by mechanical brake torque, gear-box overload, brake block heating abrasion can be reduced, from
And effectively extend the whole service life of wind energy conversion system；(3) due to effectively instead of most of mechanical brake effect, so as to reduce
The noise pollution that is brought by mechanical friction, body vibration etc..Therefore, the utility model has in wind turbine brake system
Extraordinary application prospect.
The numerical simulation result of pneumatic equipment bladess S809 aerofoil profiles shows that there is the utility model good aerodynamic brake to imitate
Really.In Mach number Ma=0.076, reynolds number Re=1 × 106, in the case of AOA=2.05 ° of the angle of attack, original aerofoil profile (i.e. S809)
Lift coefficient CL=0.165, resistance coefficient CD=0.013；It is provided with aerofoil profile (the i.e. S809- of reverse united jet flow device
RCFJ, wherein RCFJ represent Reverse Co-Flow Jet abbreviated form) in the case where other parameters are constant, jet is moved
Coefficient of discharge CμLift coefficient C when=0.02L=-0.441, resistance coefficient CD=0.065.It can be seen that, united jet flow Reverse Turning Control is
So that lift coefficient is reduced to negative value, and resistance coefficient increases to original 5 times, serves and significantly increases the effect that resistance subtracts liter, can
Quickly to carry out aerodynamic brake to blade.
Brief description of the drawings
Fig. 1 is the original aerofoil profile figures of wind mill airfoil S809.
Fig. 2 is the wind mill airfoil S809-RCFJ aerofoil profile concept maps after the reverse united jet flow of application.
Fig. 3 is the pneumatic equipment bladess outline drawing after the reverse united jet flow device of application.
Fig. 4 is the sectional view at A-A using the blade after reverse united jet flow device.
Fig. 5 is the flow field figure of S809 original aerofoil profiles when the angle of attack is 2.05 °.
Fig. 6 is the flow field figure of S809-RCFJ aerofoil profiles when the angle of attack is 2.05 °.
In figure：1- puff prots；2- air entries；3- plenum chambers；4- low-pressure chamber.
Embodiment
In order that the purpose of this utility model and advantage are more clearly understood, the utility model is entered with reference to embodiments
Row is further described.It should be appreciated that specific embodiment described herein is only to explain the utility model, and without
In restriction the utility model.
As shown in figs 2-4, the utility model embodiment provides a kind of for the reverse of pneumatic equipment bladess aerodynamic brake
Reverse united jet flow control device, the reverse united jet flow control of blade are equipped with united jet flow control device, each blade
The cross-section structure of device processed is divided into plenum chamber and low-pressure chamber's two parts, and plenum chamber is communicated with trailing edge puff prot, low pressure gas
Room is communicated with leading edge air entry；Along the plenum chamber formation high pressure draught passage of direction blade, high pressure draught passage is via leaf
Piece propeller hub is connected with air pump one end in cabin；Low-pressure air current passage, low pressure gas are formed along the low-pressure chamber of direction blade
Circulation road is connected via propeller hub with the air pump other end in cabin；Under reverse united jet flow mode of operation, air pump work,
Two ends produce pressure difference, and gases at high pressure are transported to the trailing edge plenum chamber in blade via high pressure draught passage, then by rear
Edge spout sprays；Air-flow near blade inlet edge then in the presence of leading edge low-pressure chamber and air entry, is flowed into by leading edge suction inlet
Low-pressure chamber, then the low-pressure end of air pump is transported to by low-pressure air current passage via propeller hub；Before trailing edge puff prot is located at away from aerofoil profile
At edge 80%c positions, jet open height is 1.38%c, and leading edge air entry is located at away from aerofoil profile leading edge 6%c positions, suction inlet height
Aerofoil profile chord length is represented for 0.65%c, wherein c.
Under natural wind field environment, when the excessive unsuitable wind turbine power generation of wind-force, or situations such as unit maintenance is carried out
Under when needing to shut down, especially for wind speed is excessive and situation higher than scope of design, unit should send brake instruction immediately, prevent
Only wind wheel torque is excessive and cause the destruction of wind power generating set.
Before unit sends instruction, wind energy conversion system is in running order, that is, has opened or be not turned on positive united jet flow
Control, but this will not all influence ensuing reverse united jet flow control.When wind energy conversion system unit assigns brake instruction, in cabin
The air pump in portion is switched to the plenum chamber that backward jet mode of operation, i.e. high pressure draught are delivered to blade trailing edge, low-pressure air current
The low-pressure end of air pump is flow to by the low-pressure chamber of blade.The angle of attack that air pressure sensing device on pneumatic equipment bladess is measured to flow
And speed, according to come the angle of attack and speed that flow, unit sets an initial jets momentum coefficient automatically, according to initial jets momentum
Coefficient adjusts air pump pressure size.Because air pump pressurizes to plenum chamber so that the high pressure gas room pressure of trailing edge is big
In external atmosphere pressure, then gases at high pressure are from spout ejection, in trailing edge formation air blowing.Meanwhile, the air pressure of leading edge low-pressure chamber is low
In leading edge outflow air pressure so that at leading edge suction inlet formed air-breathing, suck low-pressure chamber gas again by gas pipeline via
Propeller hub is back to air pump, recycles.
Wind energy conversion system is acted in stopping process by aerodynamic brake and mechanical brake, and the speed of blade is to be gradually reduced
, so, it is necessary to by the measurement apparatus on blade with nozzle after working as given one initial setting momentum coefficient
Air pressure and speed around detection blade with nozzle, and the new momentum of impinging jet coefficient of real-time matching in real time, by penetrating for newly matching
Amount of flow coefficient feedback adjusts the watt level of pulsometer to pulsometer.Detection and feedback regulation process more than repeating, until anti-
Untill making wind energy conversion system dead halt to the brake of united jet flow aerodynamic brake cooperative mechanical.
Comprise the following steps that：
Step 1, when wind energy conversion system unit assigns brake instruction, the air pump of engine room inside is switched to backward jet Working mould
Formula, i.e. high pressure draught will be transported to the plenum chamber of blade trailing edge, and low-pressure air current will flow to gas by the low-pressure chamber of blade
The low-pressure end of pump；
Step 2, the angle of attack and speed flowed by the air pressure sensing device detection on pneumatic equipment bladess；
Step 3, according to matching corresponding initial jets momentum coefficient the angle of attack that flows and speed, and according to initial jets
Momentum coefficient adjusts air pump watt level, in the presence of air pump, and trailing edge spout sprays jet, while leading edge air entry is carried out
Air-breathing；
Step 4, in the presence of reverse united jet flow, blade produces opposing torque, and blade velocity constantly reduces, and passes through peace
On blade and nozzle measurement apparatus detect in real time around blade and nozzle air pressure and speed, according to what is detected
Data match real-time momentum of impinging jet coefficient；
Step 5, the momentum of impinging jet coefficient feedback for obtaining real-time matching are to air pump, the watt level of corresponding regulation air pump；
Step 6, repeat step 4 and step 5 constantly carry out feedback regulation to update momentum of impinging jet coefficient, until blade turns
When prompt drop is zero, starting mechanical brake makes wind energy conversion system dead halt；
Step 7, the reverse united jet flow control device of closing.
Plenum chamber corresponds to low-pressure chamber during positive united jet flow control in fact, and low-pressure chamber of the present utility model is then right
Answer plenum chamber during positive united jet flow control.
The utility model content is illustrated and vane airfoil profile used in schematic diagram is S809 aerofoil profiles, but can be directed in practical application
Arbitrary wind-power airfoil type.
Because trailing edge spout is narrower, when high pressure gas room pressure is larger, gas by the speed of spout can than larger, from
And form high-speed jet.The power of jet can represent with momentum of impinging jet coefficient, the bigger expression jet intensity of value of the coefficient
It is bigger.Momentum of impinging jet coefficient is a nondimensional parameter, similar to the ascending aorta banding of aerofoil profile, directly reflects that jet is strong and weak,
It is the important parameter for determining jet characteristics and influence Airfoil Aerodynamic Performance, is defined as follows：
Wherein, m is mass flowrate, VjFor the effluxvelocity of nozzle, ρ∞For from origin current density, V∞For from origin flow velocity
Degree, S is blade reference area.
Reverse united jet flow control technology can make wind energy conversion system open backward jet device when needing to shut down, from trailing edge spray
The high velocity air that mouth is ejected forms inhibition to carrying out stream so that flowing shifts to an earlier date stall, very big in the formation of trailing edge nozzle
Disengagement zone, while carrying out air-breathing in leading edge suction inlet, reduces the flowed energy of suction inlet rear top airfoil near wall region, promotes in aerofoil profile
Airflow on surface is separated in advance.According to aerodynamic principle, the separation flowing a wide range of in advance of top airfoil significantly reduces aerofoil profile
Lift, and resistance is increased, or even under the jet action of some strength, lift is reduced to zero or negative value, therefore can reach
To the purpose of fast braking blade.
Traditional positive united jet flow active Flow Control technology is to trailing edge in aerofoil profile upper surface close to edge opening
Blown, air-breathing is being carried out close to opening at trailing edge, while keeping inspiratory capacity and air-blowing quantity equal, so as to realize gas
Recycle.The reverse united jet flow control technology contrast that the utility model is proposed, it is leaned in aerofoil profile upper surface
Opening is blown at nearly trailing edge, is being carried out air-breathing close to edge opening, while keeping inspiratory capacity and air-blowing quantity equal, is being realized
Gas is recycled.The utility model is a technological innovation of united jet flow method, and principal character is embodied in：(1)
United jet flow device is opened in wind energy conversion system normal work and carries out forward flow control, with lift-rising drag reduction, reduction incision wind is reached
Speed, the purpose for improving generated output；(2) then reverse united jet flow control is enabled according to the utility model when wind energy conversion system needs and shut down
Device processed, reduces lift, increases resistance, to reach the purpose of aerodynamic brake；(3) reversely united jet flow and positive united jet flow it
Between switching only by by jet reversely i.e. can be achieved, easy to operate, braking effect is notable.
The main cause that reverse united jet flow control technology of the present utility model can effectively carry out aerodynamic brake has：First,
Trailing edge is blown the injection jet opposite with direction of flow into flow field, and inhibition is played to carrying out stream, in trailing edges formation office
Portion higher-pressure region, produces adverse pressure gradient, so as to cause flow separation；2nd, leading edge air entry has been siphoned away in suction inlet rear border layer
Portion of energy, so as to reduce the flowed energy of aerofoil profile upper surface near wall region, prevents it to occur from overcoming trailing edge adverse pressure gradient
Separate in advance；(3) under trailing edge air blowing, the double action of leading edge air-breathing, a wide range of flow separation occurs above aerofoil profile, aerofoil profile
Equivalent camber is substantially reduced or even is changed into negative value, so lift is remarkably decreased or even be changed into negative value, resistance is dramatically increased, so as to
Fast and effeciently to carry out aerodynamic brake to blade.
Fig. 5 is flow field figure of the original aerofoil profiles of S809 when the angle of attack is 2.05 °, and now aerofoil profile upper surface is essentially attachment stream
Dynamic, front and rear edge is not all separated.Fig. 6 is flow field figure of the S809-RCFJ aerofoil profiles when the angle of attack is 2.05 °, now in aerofoil profile
There are flow separation phenomenon, particularly rear to occur in that a wide range of Disengagement zone before and after the trailing edge jet of upper surface.As a result of anti-
To united jet flow flow control technique, the flow velocity of aerofoil profile upper surface is obviously reduced, and then circular rector is substantially reduced, and lift coefficient is significantly
Reduce；Meanwhile, air flow resistance that united jet flow trailing edge sprays flows, and leading edge suction inlet siphoned away part energy out of boundary layer again
Amount, so as to be greatly promoted flow separation of the aerofoil profile under this angle of attack so that resistance coefficient is dramatically increased, therefore is served non-
Normal significant aerodynamic brake effect.
Therefore, reverse united jet flow control technology is can be seen that from theory analysis and numerical simulation result to rise reduction
Force coefficient, increase resistance coefficient, to promote to flow the effect separated in advance all fairly obvious, thus indicate the utility model for
Pneumatic equipment bladess aerodynamic brake is very effective.The reverse united jet flow control dress of pneumatic equipment bladess that the utility model is proposed
Putting can make braking efficiency of the pneumatic equipment bladess under different operating modes all have significant improvement than conventional brake mode.And
And, reverse united jet flow realizes that gas circulation is utilized by air pump reflux, and energy expenditure is low, high using controllability, can be with
Under different operating modes, by adjusting air pump watt level, pneumatic equipment bladess are made to reach the effect of fast braking.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as protection domain of the present utility model.
Claims (2)
1. a kind of reverse united jet flow control device for pneumatic equipment bladess aerodynamic brake, it is characterised in that on each blade
Reverse united jet flow control device is equipped with, the cross-section structure of the reverse united jet flow control device of blade is divided into plenum chamber
With low-pressure chamber's two parts, plenum chamber is communicated with trailing edge puff prot, and low-pressure chamber communicates with leading edge air entry；Along blade side
To plenum chamber formation high pressure draught passage, high pressure draught passage is connected via blade propeller hub with air pump one end in cabin
It is logical；Low-pressure air current passage is formed along the low-pressure chamber of direction blade, low-pressure air current passage is via the air pump in propeller hub and cabin
The other end is connected；Trailing edge puff prot is located at away from aerofoil profile leading edge 80%c positions, and jet open height is 1.38%c, leading edge air-breathing
Mouth is located at away from aerofoil profile leading edge 6%c positions, and suction inlet is highly 0.65%c, and wherein c represents aerofoil profile chord length.
2. a kind of reverse united jet flow control device for pneumatic equipment bladess aerodynamic brake as claimed in claim 1, it is special
Levy and be, the reverse united jet flow control device is opened up to continuous or discrete distribution along blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720135110.8U CN206571627U (en) | 2017-02-15 | 2017-02-15 | A kind of reverse united jet flow control device for pneumatic equipment bladess aerodynamic brake |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720135110.8U CN206571627U (en) | 2017-02-15 | 2017-02-15 | A kind of reverse united jet flow control device for pneumatic equipment bladess aerodynamic brake |
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| Publication Number | Publication Date |
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| CN206571627U true CN206571627U (en) | 2017-10-20 |
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ID=60058259
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| CN201720135110.8U Expired - Fee Related CN206571627U (en) | 2017-02-15 | 2017-02-15 | A kind of reverse united jet flow control device for pneumatic equipment bladess aerodynamic brake |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110094293A (en) * | 2019-05-06 | 2019-08-06 | 上海理工大学 | A kind of suction of joint leading edge and the jet-propelled vertical axis windmill of leaf tail |
-
2017
- 2017-02-15 CN CN201720135110.8U patent/CN206571627U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110094293A (en) * | 2019-05-06 | 2019-08-06 | 上海理工大学 | A kind of suction of joint leading edge and the jet-propelled vertical axis windmill of leaf tail |
| CN110094293B (en) * | 2019-05-06 | 2020-07-31 | 上海理工大学 | Vertical axis wind turbine combining front edge suction and blade tail jet |
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