CN208996867U - A kind of pneumatic equipment bladess with micro-actuator - Google Patents
A kind of pneumatic equipment bladess with micro-actuator Download PDFInfo
- Publication number
- CN208996867U CN208996867U CN201821533532.1U CN201821533532U CN208996867U CN 208996867 U CN208996867 U CN 208996867U CN 201821533532 U CN201821533532 U CN 201821533532U CN 208996867 U CN208996867 U CN 208996867U
- Authority
- CN
- China
- Prior art keywords
- micro
- actuator
- blade
- shell
- pneumatic equipment
- Prior art date
- 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.)
- Active
Links
Classifications
-
- 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
Landscapes
- Wind Motors (AREA)
Abstract
A kind of pneumatic equipment bladess with micro-actuator disclosed by the utility model, blade is in aerofoil profile, blade surface is arranged at intervals with three micro-actuators along airfoil edge from front to back, each micro-actuator includes shell, bubble chamber film there are three being respectively provided on the surface of shell, is additionally provided with separation layer between shell and blade.A kind of pneumatic equipment bladess with micro-actuator of the utility model, by the way that micro-actuator is arranged on blade, effect of the micro-actuator of blade surface by ambient air pressure, the bubble being attached to above it constantly shrinks and expands, make intercoupling for micro-actuator and airfoil surface flow field, the manipulation of the vortex discrete state of realization pair, enhances the adaptability that pneumatic equipment bladess change wind speed.
Description
Technical field
The utility model belongs to fluid machines technical field, is related to a kind of pneumatic equipment bladess with micro-actuator.
Background technique
Wind energy conversion system is influenced by random wind speed, wind direction, the flow separation in the flow field around vane airfoil profile and the shape in whirlpool
It is all extremely complex at process.After wind energy conversion system runs a period of time, pneumatic efficiency can be reduced, and main cause is with the incoming flow angle of attack
Increase, the boundary layer in the flow field around the aerofoil profile of wind energy conversion system separates, and causes lift coefficient to reduce, resistance coefficient increases, mistake
Fast phenomenon occurs.And stall event generation often along with the irregular variation of relevant pressure field and velocity field, when serious even
Pressure fluctuation can be generated, and then generates vibration noise, aggravates material damage, shortens the service life of wind energy conversion system.
Blade obtains the main component of wind energy as wind energy conversion system, its aeroperformance and structural behaviour directly decides wind-force
The working efficiency and service life of machine.The blade of existing wind energy conversion system is when the incoming flow angle of attack is larger, it may occur that obvious stall
Phenomenon, " stall " make the aerodynamic characteristic of wind energy conversion system receive serious influence, output power are caused to strongly reduce.Therefore to go deep into
Flow separation phenomenon, the forming process in stall whirlpool in the flow field around wind blade aerofoil profile are studied in ground, by making impeller into one
Step is improved to improve the pneumatic efficiency of wind energy conversion system.
Utility model content
The purpose of the utility model is to provide a kind of pneumatic equipment bladess with micro-actuator, postpone the airfoil stall angle of attack, more
Effective control wind mill airfoil peripheral limit layer separation flowing.By installing the micro- cause of air bubble type in the upper surface of wind mill airfoil
The method of device is moved to change the separate condition in flow field patterns and boundary layer around aerofoil profile, postpones the separation in flow field around aerofoil profile, reaches
To the purpose for increasing the lift coefficient of wind energy conversion system, the dynamic stall performance for improving wind energy conversion system and control boundary layer separation flowing.
The utility model is the technical scheme adopted is that a kind of pneumatic equipment bladess with micro-actuator, blade are in aerofoil profile, leaf
Piece surface is arranged at intervals with three micro-actuators along airfoil edge from front to back, and each micro-actuator includes shell, shell
Bubble chamber film there are three being respectively provided on surface, is additionally provided with separation layer between shell and blade.
Other features of the utility model also reside in,
The center of three micro-actuators is sequentially located at the position of the 0.1c of blade edge, the position of 0.5c and the position of 0.7c
It sets, c is the chord length of blade.
Case surface is radially opened there are three circular venthole, the centre of each venthole face bubble chamber film, is ventilated
The diameter in hole is 0.003c, and c is leaf chord length.
Opened on blade surface there are three groove, each groove is located at the lower section of each micro-actuator, the axis of groove with outside
The axis of shell is parallel, and the groove depth of groove is 0.01t, and groove width 0.01c, groove axial length is 0.1c, axial open at one end, uses
Enter in air, other end sealing, wherein c is the chord length of blade, and t is vane thickness.
The material of shell is monocrystalline silicon, and the axial length of shell is 0.1c, and the width of shell 1 is 0.025c, and c is blade
Chord length.
Bubble chamber film is made of silicone rubber, and three bubble membrane structures are identical, and the width of each bubble chamber film is 0.02c, along
The width of airflow direction is 0.02c, and c is the chord length of blade, also, the place of bubble chamber film and cage connection, four angles are all made of
Circular arc is excessive, causes bubble chamber film to fall off to reduce stress concentration.
Separation layer uses metal foil material.
The utility model has the beneficial effects that a kind of pneumatic equipment bladess with micro-actuator, by wind mill airfoil
The method of micro balloon actuator is installed to change the separate condition in flow field patterns and boundary layer around aerofoil profile in upper surface, postpones the wing
The separation in flow field around type reaches and increases the lift coefficient of wind energy conversion system, the dynamic stall performance for improving wind energy conversion system and control boundary
The purpose of layer separation flowing.By the way that micro-actuator is arranged on blade, the micro-actuator of blade surface is by ambient air pressure
Effect, the bubble being attached to above it constantly shrinks and expands, and makes intercoupling for micro-actuator and airfoil surface flow field, real
The manipulation of vortex discrete state now pair, enhances the adaptability that pneumatic equipment bladess change wind speed.Especially in the big angle of attack
When aerofoil profile upper and lower surface pressure difference increase, the lift of aerofoil profile increases, and delays the separation of aerofoil profile peripheral limit laminar flow.Critical angle of attack
Delay also improve the dynamic stall performance of aerofoil profile, enhance wind energy conversion system traveling comfort, realize micro-actuator convection current
Dynamic active control improves the aeroperformance of wind mill airfoil.
Detailed description of the invention
Fig. 1 is the distributed architecture schematic diagram of micro-actuator in the blade profile aerofoil profile of the utility model；
Fig. 2 is the overlooking structure diagram of micro-actuator on the blade of the utility model；
Fig. 3 is the blade of the utility model and the partial enlargement structural representation of micro-actuator junction；
Fig. 4 is the operation schematic diagram of the micro-actuator actuating of the utility model.
In figure, 1. shells, 2. separation layers, 3. bubble chamber films, 4. ventholes, 5. grooves.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawings and detailed description.
A kind of pneumatic equipment bladess with micro-actuator of the utility model, as shown in Figure 1, blade is in aerofoil profile, blade surface
It is arranged at intervals with three micro-actuators from front to back along airfoil edge, each micro-actuator includes shell 1 and separation layer 2, outside
Three bubble chamber films 3 are uniformly arranged on the surface of shell 1, separation layer 2 is arranged between shell 1 and blade.
The center of three micro-actuators is sequentially located at the position of the 0.1c of blade edge, the position of 0.5c and the position of 0.7c
It sets, c is the chord length of blade.
As shown in Fig. 2, 1 surface of shell is radially opened, there are three circular venthole 4, each 4 face bubble chamber films 3 of venthole
Centre, the diameter of venthole is 0.003c, and c is leaf chord length.
As shown in figure 3, opening on blade surface, there are three grooves 5, and each groove 5 is located at the lower section of each micro-actuator, recessed
The axis of slot 5 is parallel with the axis of shell 1, and the groove depth of groove 5 is 0.01t, groove width 0.01c, and 5 axial length of groove is
0.1c, it is axial open at one end, enter for air, other end sealing, wherein c is the chord length of blade, and t is vane thickness.
The material of shell 1 is monocrystalline silicon, and the axial length of shell 1 is 0.1c, and the width of shell 1 is 0.025c, and c is blade
Chord length.
Bubble chamber film 3 is made of silicone rubber, and three 3 structures of bubble chamber film are identical, and the width of each bubble chamber film 3 is 0.02c, edge
The width of airflow direction be 0.02c, c is the chord length of blade, also, the place that bubble chamber film 3 is connect with shell 1, four angles are equal
It is excessive using circular arc, cause bubble chamber film to fall off to reduce stress concentration.
Separation layer 2 uses metal foil material.
A kind of design method of pneumatic equipment bladess with micro-actuator of the utility model is as follows:
3 micro balloon actuators are set backward along aerofoil profile leading edge in blade upper surface, defining most edge is that coordinate is former
Point, x-axis along aerofoil profile string direction, y-axis perpendicular to aerofoil profile string, the center of three micro balloon actuators respectively correspond away from
From aerofoil profile upper surface right above aerofoil profile leading edge 10%, 50%, 70% chord length pair position；
Shell 1 is made of monocrystalline silicon piece, and bubble chamber film 3 is attached on silicon wafer, is made of silicone rubber；Metal foil is as bubble
The flexibility of separation layer 2 between shell and pneumatic equipment bladess, metal foil is relatively good, using metal foil as substrate, it is easy to accomplish gas
Alveolitoid micro-actuator and curved surface it is integrated.
Three micro bubbles films 3 are set on each micro-actuator, and 3 inside of bubble chamber film is identical, its longitudinal width is set as
0.02c, the size along direction of flow are 0.02c, and wherein c is leaf chord length, in vertical direction deformation displacement in 0.01t or so, t
For vane thickness.It is spaced small distance between bubble, arc transition is used to four angles of releasing layer, to reduce stress collection
In caused by film separation, a venthole 4 is set below each bubble；The thickness of bubble chamber film is set as 120 μm, single plane meter
Very little is 0.1c × 0.025c.
A kind of course of work of pneumatic equipment bladess with micro-actuator of the utility model is: micro-actuator is in inoperative shape
There is (when unaerated body) smooth shape under state；When wind energy conversion system high speed rotation, micro balloon actuator in the operating condition, such as
Shown in Fig. 4, compressed air is entered by the side of micro balloon actuator lower grooves 5, and the other side of groove 5 is sealing,
Gas pressure acts on lower air by venthole 4, expands micro bubbles film 3, outwardly protrudes, generates deformation, is formed to have and be put down
The bubble of sliding shape flexibility wall surface, shape are in " bulge " shape.When air pressure becomes smaller, bubble is gradually reduced, until restoring to the original state.
The actuation motion generated using the bubble shrinkage within the scope of boundary-layer and expansion, the manipulation for the vortex discrete state realized pair, increasing
The adaptability that strong pneumatic equipment bladess change wind speed.
Claims (7)
1. a kind of pneumatic equipment bladess with micro-actuator, which is characterized in that the blade is in aerofoil profile, and the blade surface is along aerofoil profile
Edge is arranged at intervals with three micro-actuators from front to back, and each micro-actuator includes shell (1), the shell (1)
Surface on be respectively provided with there are three bubble chamber film (3), separation layer (2) are additionally provided between the shell (1) and the blade.
2. a kind of pneumatic equipment bladess with micro-actuator as described in claim 1, which is characterized in that three micro-actuators
Center be sequentially located at the blade edge 0.1c position, the position of 0.5c and the position of 0.7c, c is the string of the blade
It is long.
3. a kind of pneumatic equipment bladess with micro-actuator as described in claim 1, which is characterized in that shell (1) surface
There are three radially opening circular venthole (4), the centre of bubble chamber film (3) described in each venthole (4) face is described
The diameter of venthole is 0.003c, and c is the leaf chord length.
4. a kind of pneumatic equipment bladess with micro-actuator as described in claim 1, which is characterized in that opened on the blade surface
There are three groove (5), each groove (5) is located at the lower section of each micro-actuator, the axis of the groove (5) and institute
The axis for stating shell (1) is parallel, and the groove depth of the groove (5) is 0.01t, groove width 0.01c, groove (5) axial length
It is axial open at one end for 0.1c, enter for air, other end sealing, wherein c is the chord length of the blade, and t is the leaf
Piece thickness.
5. a kind of pneumatic equipment bladess with micro-actuator as described in claim 1, which is characterized in that the material of the shell (1)
Matter is monocrystalline silicon, and the axial length of the shell (1) is 0.1c, and the width of the shell (1) is 0.025c, and c is the blade
Chord length.
6. a kind of pneumatic equipment bladess with micro-actuator as described in claim 1, which is characterized in that the bubble chamber film (3) by
Silicone rubber is constituted, and three bubble chamber film (3) structures are identical, and the width of each bubble chamber film (3) is 0.02c, along gas
The length for flowing direction is 0.02c, and c is the chord length of the blade, also, the ground that the bubble chamber film (3) is connect with the shell (1)
Side, it is excessive that four angles are all made of circular arc, causes bubble chamber film to fall off to reduce stress concentration.
7. a kind of pneumatic equipment bladess with micro-actuator as described in claim 1, which is characterized in that the separation layer (2) is adopted
Use metal foil material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821533532.1U CN208996867U (en) | 2018-09-19 | 2018-09-19 | A kind of pneumatic equipment bladess with micro-actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821533532.1U CN208996867U (en) | 2018-09-19 | 2018-09-19 | A kind of pneumatic equipment bladess with micro-actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208996867U true CN208996867U (en) | 2019-06-18 |
Family
ID=66800617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821533532.1U Active CN208996867U (en) | 2018-09-19 | 2018-09-19 | A kind of pneumatic equipment bladess with micro-actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208996867U (en) |
-
2018
- 2018-09-19 CN CN201821533532.1U patent/CN208996867U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB2466478A (en) | Suction generation device | |
| CN201436385U (en) | Wind motor blade | |
| EP1687511A1 (en) | High lift rotor or stator blades with multiple adjacent airfoils cross-section | |
| Troldborg et al. | Simulation of a MW rotor equipped with vortex generators using CFD and an actuator shape model | |
| CN105840551A (en) | Pneumatic implementation method for multi-operating-point high-load compressor blades | |
| EP3168459A1 (en) | Vortex generator, wind turbine blade, and wind turbine power generating apparatus | |
| US20150300183A1 (en) | Fluid Turbine With Turbine Shroud And Ejector Shroud Coupled With High Thrust-Coefficient Rotor | |
| CN107575341A (en) | wind turbine rotor blade with vortex generator | |
| Saleem et al. | Effect of rotor axial position on the aerodynamic performance of an airborne wind turbine system in shell configuration | |
| Choudhry et al. | Effects of wake interaction on downstream wind turbines | |
| Hao et al. | Flow control for high-solidity vertical axis wind turbine based on adaptive flap | |
| CN208996867U (en) | A kind of pneumatic equipment bladess with micro-actuator | |
| CN106089567A (en) | Circular cone wind wheel circumferential edge is along the fan blade circle of the centrifugal flow four side conversion of the top of a wall that keeps out the wind | |
| TW201538392A (en) | High pitch stall resisting propeller | |
| CN106949021B (en) | A kind of pneumatic equipment bladess for improving stalling characteristics based on Fractal optimization | |
| KR101434469B1 (en) | Blades for wind turbine | |
| Maftouni et al. | Effects of implementing a Diffuser around the Wind Turbine | |
| CN106321347A (en) | Wind driven generator eddy generator | |
| JP2002213343A (en) | Wind speed-up device and wind power generator using the same | |
| Kang et al. | Numerical investigation of active control for an S809 wind turbine airfoil | |
| Mishra et al. | Numerical investigation of a finite wing section with a bleed hole allowing boundary layer suction | |
| CN105298925B (en) | Conduit opens up the blade root fluting Profile For Compressor Stator to highly tapered change | |
| Maftouni et al. | Optimization of a real scale shrouded wind turbine using 3D CFD analysis | |
| JP6034520B1 (en) | Exhaust promotion device | |
| Lehser-Pfeffermann et al. | Investigation and evaluation of aerodynamic efficiency improvement measures for vertical axis small wind turbines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |