CN107065383A - A kind of stealthy cape of controllable Three Dimensional Thermal based on multilayer paraffin phase change material - Google Patents
A kind of stealthy cape of controllable Three Dimensional Thermal based on multilayer paraffin phase change material Download PDFInfo
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- CN107065383A CN107065383A CN201710062112.3A CN201710062112A CN107065383A CN 107065383 A CN107065383 A CN 107065383A CN 201710062112 A CN201710062112 A CN 201710062112A CN 107065383 A CN107065383 A CN 107065383A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D3/00—Overgarments
- A41D3/08—Capes
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
Abstract
The invention provides a kind of stealthy cape of controllable Three Dimensional Thermal based on multilayer paraffin phase change material.The surface that the stealthy cape of controllable Three Dimensional Thermal is made up of paraffin composite phase change material covers shell and realized.Wherein, surface covering shell is that multiple paraffin composite phase change material circular layers are superimposed composition from bottom to top, by the mushy stage degree for controlling paraffin composite phase change material in different circular layers, the bulk thermal conductivity constants that every layer of correspondence can be made different, obtain the stealthy required three-dimensional thermal conductivity distribution of heat, and then hot-fluid is bypassed behind cape region, temperature field and thermoisopleth recover original distribution, realize hot stealthy function.Meanwhile, by the solid-liquid state of paraffin composite phase change material in each circular layer of loop control, the real-time ON/OFF performance of hot stealthy cape is realized, so as to overcome the shortcoming that hot stealthy cape is unable to cycling switch.
Description
Technical field
The present invention relates to a kind of implementation method of the stealthy cape of controllable Three Dimensional Thermal based on multilayer paraffin phase change material and
Device, can be applied to hot-fluid control field.
Background technology
, document 1 in 2006：“J.B.Pendry et al,SCIENCE,2006(312):1780 " propose using different first
The direction of propagation of light wave can be manipulated to medium, optic camouflage clothing concept is realized, the extensive concern of people is caused, as optics
The study hotspot in field.At the same time, the expansion field applied as optic camouflage clothing, i.e., manipulate heat by artificial structure
Direction is flowed, realizing that calorifics is stealthy also quick turns into a hot issue in thermodynamics field., document 2 in 2013：
“R.Schittny et al,Phys.Rev.Lett.2013(110):195901 " have made two using copper and dimethione
Tie up circular heat cape, experimental verification stealth effect., document 3 in 2013：“T.Z.Yang et al,J.Phys.D:
Appl.Phys.2013(46):305102 " derive the hot cape conversion medium thermal conductivity with conformal random cross-sectional shape
Expression formula, and simulation analysis its thermal conduction characteristics., document 4 in 2014：“F.C.Mao et al,Acta
Phys.Sin.2014(63):014401 " has carried out research and analysis to the hot cape of arbitrary cross section cylindricality, is derived two dimension non-
The thermal conductivity expression formula of the conformal hot cape of arbitrary shape.But, the design of current calorifics stealth structure is mostly based on two dimensional surface
Structural model is emulated and experiment test, and the three-dimensional stealthy cape of calorifics is then rarely reported.
In addition, the stealthy cape of current calorifics does not possess tunable function (i.e. the stealthy on/off function of heat) also, sentence is changed
The structure of the stealthy cape of calorifics is talked about once it is determined that its Stealth Fighter will be always in the presence of being unalterable later, it is main former
Can be by the natural material of active real-time monitoring because being a lack of thermal conductivity, this directly governs the further hair of calorifics stealth technology
Exhibition.Therefore a kind of simple and practical method of design is needed to be tuned the hot stealthy function of the stealthy cape of calorifics, he will be to heat
The practical application for learning stealthy cape is had very important significance, and its practicalization is promoted significantly.
Paraffin phase change material has solid-liquid two states, in the presence of ambient light, heat, electricity, magnetic or stress, paraffin
Phase-change material can change between solid-state and liquid two states, and along with the state change of paraffin phase change material, its thermal conductivity
Reversible change can also occur for rate coefficient.
The present invention provides a kind of stealthy cape of controllable heat based on multilayer paraffin phase change material.The three-dimensional controllable heat is hidden
The surface that body cape is made up of paraffin phase change material covers shell and realized.Wherein, covering shell in surface is multiple wax phase changes
Material circular layer is superimposed composition from bottom to top, by controlling the mushy stage degree of paraffin phase change material in different circular layers, can make every
The different bulk thermal conductivity constants of layer correspondence, obtain the stealthy required three-dimensional thermal conductivity distribution of heat, and then hot-fluid is bypassed cape region
Afterwards, temperature field and thermoisopleth recover original distribution, realize hot stealthy function.Meanwhile, pass through stone in each circular layer of loop control
The solid-liquid state of wax composite phase-change material, realizes the real-time ON/OFF performance of hot stealthy cape, so as to overcome hot stealthy cape
The shortcoming that can not be switched.The present invention is based on paraffin composite phase change material mushy stage reversible transformation principle, can effectively save energy
Amount, the pseudo- ETL estimated time of loading of extension；In realization, using the widely used device such as electricity, light-operated switch, hot stealthy cape is significantly reduced
Complexity and cost, practical application potentiality are big.Using the technology of the present invention, the stealthy cape of calorifics can be made in most of time
(i.e. not stealthy) is closed, other side is detected some invalid calorifics information, and it is stealthy that heat is opened when needing
Function allows other side's detection less than its thermal signals, effectively hides various important informations, benumbs enemy, us is taken action with unexpected
Property.The technology can make computer chip high efficiency and heat radiation, so as to improve computing power；Heat illusion is realized, infrared detector is confused；
In the equipment such as spacecraft return capsule, satellite there are huge applications to be worth simultaneously.
The content of the invention
The technical problems to be solved by the invention are：Overcome the stealthy cape of existing calorifics be mostly based on two-dimension plane structure,
Do not possess the shortcoming of tunability (being unable to the stealthy function of ON/OFF heat) with the hot stealthy function of the stealthy cape of calorifics, utilize stone
There is provided the new skill that one kind realizes the stealthy cape of the three-dimensional calorifics of controllable (can ON/OFF) for this common materials of wax composite phase-change material
Art so that system possesses that simple in construction, speed is fast, be easy to operation, energy consumption small, real-time and the low advantage of cost of implementation.
Technical scheme：
A kind of stealthy cape of controllable Three Dimensional Thermal based on multilayer paraffin phase change material, including substrate layer, adiabatic wall,
The surface covering circular layer of paraffin composite phase change material circular layer composition, the thin metal layer for investing paraffin composite phase change material circular layer inwall
Paster, internal supporting shell, control unit and supply unit；Surface covering circular layer is multiple paraffin composite phase change material circular layers under
And upper superposition is constituted, each equal metal clad thin layer paster of paraffin composite phase change material circular layer inner wall surface, each two paraffin is answered
There is adiabatic wall to isolate between conjunction phase-change material circular layer；Internal supporting shell is in multilayer paraffin composite phase change material circular layer
Side, for carrying multilayer paraffin composite phase change material circular layer, the target being hidden is positioned over the intracavitary of internal supporting shell；Inside branch
Support shell is contacted with thin metal layer paster, while internal supporting shell, which corresponds at each thin metal layer paster, is drilled with aperture, aperture
Aperture is that 1 μm~1cm, depth are 1 μm~10cm；Conducting wire in aperture, wire one end is connected on thin metal layer paster, separately
One end sequentially passes through control unit and supply unit ground connection, by manipulating control unit, can regulate and control supply unit to every layer of stone
The heat time of wax composite phase-change material circular layer, and then control paraffin composite phase change material in different paraffin composite phase change material circular layers
The mushy stage degree of conversion of material, the bulk thermal conductivity constants that every layer of paraffin composite phase change material circular layer correspondence can be made different, realizes heat
Stealthy required three-dimensional thermal conductivity distribution, and then hot-fluid is bypassed behind cape region, temperature field and thermoisopleth recover original point
Cloth, realizes hot stealthy function.
The shape of described paraffin composite phase change material circular layer be hemisphere, cone, cosine body, positive body with cord, cylinder,
Semiellipsoid, square, cuboid or hexahedron, each paraffin composite phase change material circular layer can independent control and work；Institute
The width for the paraffin composite phase change material circular layer stated is 1 μm~10cm, thickness, is 20nm~10cm；Described paraffin compound phase
It is that porous media is added in paraffin phase change material to become material circular layer, such as metal foam, metal beehive, graphite, metallic, carbon
Fiber, nano-particle, polystyrene, ribbing piece, encapsulated, container encapsulation or by different wax phase changes on encapsulation wall
Material is combined.
Described thin metal layer paster is Al pieces, Ag pieces, Au pieces, Cu pieces or Ni pieces, and its width is 1 μm~10cm, thickness
For 20nm~10cm.
Described adiabatic wall is calcium silicates, polyalcohol/polyisocyanates, RPUF, polyphenyl second
Alkene foamed plastics, foam glass, In2O3、SnO2Or ITO, its width is that 1nm~10cm, thickness are 1nm~10cm.
Described inside supporting shell is polyimides, plastics, BK7 optical glass, SiO2、Si3N4Or Al2O3；Described substrate
Layer is BK7 optical glass, SiO2、Si3N4Or Al2O3。
Described control unit is automatically controlled, light-operated, acoustic control or magnetic switch；Described supply unit is electric energy, heat energy, light
Energy or nuclear energy.
Described multilayer paraffin composite phase change material circular layer is realized by Material growth technique, including electron beam evaporation, gold
Belong to organic compound chemical gaseous phase deposition, vapor phase epitaxial growth and molecular beam epitaxial method.
Beneficial effects of the present invention：Solid-liquid state of the present invention based on paraffin composite phase change material in the different circular layers of control,
Energy, the pseudo- ETL estimated time of loading of extension can effectively be saved；In realization, using the widely used device such as electricity, light-operated switch, significantly drop
The low complexity and cost of hot stealthy cape, practical application potentiality are big.The technology can make computer chip high efficiency and heat radiation, so that
Improve computing power；Heat illusion is realized, infrared detector is confused；Have simultaneously in the equipment such as spacecraft return capsule, satellite
Huge applications are worth.
The present invention provides a kind of stealthy cape of controllable Three Dimensional Thermal based on multilayer paraffin composite phase change material, can pass through
The thermal conductivity distribution of outer power-up, heat, light or magnetic field to this common materials of change paraffin composite phase change material is realized there is provided one kind
The new technology of the stealthy cape of the three-dimensional calorifics of controllable (can ON/OFF) so that system possesses that simple in construction, speed is fast, be easy to operation,
Energy consumption is small, real-time and the low advantage of cost of implementation.
Brief description of the drawings
Fig. 1 (a) is based on the stealthy bucket of controllable Three Dimensional Thermal of N layers of (N >=1) paraffin phase change material for one kind that the present invention is provided
Paulin sectional drawing.
Fig. 1 (b) is based on the stealthy bucket of controllable Three Dimensional Thermal of N layers of (N >=1) paraffin phase change material for one kind that the present invention is provided
Paulin top view.
Fig. 2 (a) is internal supporting shell schematic diagram.
Fig. 2 (b) is N layers of (N >=1) paraffin phase change material paraffin composite phase change material circular layer schematic diagram.
Fig. 2 (c) is the stealthy cape schematic diagram of controllable Three Dimensional Thermal.
Fig. 3 (a) is based on the stealthy bucket of controllable Three Dimensional Thermal of N layers of (N >=1) paraffin phase change material for one kind that the present invention is provided
Paulin opens up under state the heat flux distribution situation of (i.e. paraffin composite phase change material is under different conditions) in hot stealthy function.
Fig. 3 (b) is based on the stealthy bucket of controllable Three Dimensional Thermal of N layers of (N >=1) paraffin phase change material for one kind that the present invention is provided
Paulin under hot stealthy function closed mode (i.e. paraffin composite phase change material be in different conditions under) heat flux distribution situation.
In figure：1 substrate layer；
The 2 stealthy capes of controllable Three Dimensional Thermal based on N layers of (N >=1) paraffin phase change material paraffin composite phase change material circular layer；
3 thin metal layer pasters；4 adiabatic walls；5 inside supporting shells；6 hot stealthy regions；7 apertures；
8 wires；9 control units；10 supply units；11 ground wires；12 thermoisopleths.
Embodiment
To cause the content of technical scheme to become apparent from, this is described in detail below in conjunction with technical scheme and accompanying drawing
The embodiment of invention.Material growth technology therein includes：Electron beam evaporation, metallo-organic compound chemical vapor deposition
The common technologies such as shallow lake, vapor phase epitaxial growth, and molecular beam epitaxy technique.Mask process therein includes electron beam exposure and focusing
The common technologies such as ion beam exposure.Etching technics therein includes wet etching and dry etching, and such as acid system etching, electron beam are carved
The conventional process such as erosion, focused-ion-beam lithography and reactive ion beam etching (RIBE).
Embodiment 1
First, internal supporting shell 5 is formed on substrate 1 using Material growth technique, such as shown in accompanying drawing 2 (a)；
Then, by Material growth technique and mask process, by designed paraffin composite phase change material circular layer in substrate 1
Successively it is superimposed from the bottom to top with the outer surface of internal supporting shell 5, realizes N layers of paraffin composite phase change material surface covering circular layer 2, such as
Shown in accompanying drawing 2 (b).Wherein, the design of paraffin composite phase change material surface circular layer and internal supporting shell can use finite time-domain
Calculus of finite differences, FInite Element scheduling algorithm.Thin metal layer paster 3 is formed on N layers of paraffin composite phase change material list by coating process
Between the internal ring wall of face covering circular layer 2 and the outer wall of internal supporting shell 5.
Internal supporting shell corresponds at each thin metal layer paster 3, is all drilled with aperture 7.Conducting wire 8 in aperture, wire
One end is connected on thin metal layer paster 3, and the other end passes through control unit 9 and the ground wire 11 of supply unit 10, is controlled by manipulating
Unit 9 processed, can regulate and control the action time of 10 pairs of every layer of paraffin composite phase change materials of supply unit, and then control in different circular layers
The mushy stage degree of paraffin composite phase change material, the thermal conductivity that every layer of paraffin composite phase change material circular layer correspondence can be made different
Coefficient, realizes the stealthy required three-dimensional thermal conductivity distribution of heat, and then hot-fluid is bypassed behind cape region, and temperature field and thermoisopleth are extensive
The distribution of coming is restored, hot stealthy function is realized.Finally realize that a kind of controllable based on multilayer paraffin composite phase change material is three-dimensional
The stealthy cape of heat, shown in such as accompanying drawing 2 (c).
As shown in figure 3, when the stone in a kind of stealthy cape of controllable Three Dimensional Thermal based on multilayer paraffin composite phase change material
The generating state change of wax composite phase-change material, the distribution of its bulk thermal conductivity constants can also change, and then realize direction of heat flow
Regulation and control, realize that the "ON" of hot stealthy function shields external heat and make it that institute's hidden objectses are not extraneous in internal supporting shell 10
Detected, i.e., hot-fluid passes through this by not changing its thermoisopleth (shown in such as Fig. 3 (a)) and "Off" i.e. hot-fluid after the hot stealthy cape
Its thermoisopleth changes after the stealthy cape of heat, causes the interior object of putting of internal supporting shell 10 to detect (such as Fig. 3 by the external world
(b) shown in).
Described above is the technical principle and instantiation that the present invention is applied, the equivalent change that the conception according to the present invention is done
Change, if its scheme for being used still covered without departing from specification and drawings spirit when, all should within the scope of the invention,
Illustrate hereby.
Claims (10)
1. a kind of stealthy cape of controllable Three Dimensional Thermal based on multilayer paraffin phase change material, it is characterised in that the controllable is three-dimensional
The stealthy cape of heat covers circular layer including the surface that substrate layer, adiabatic wall, paraffin composite phase change material circular layer are constituted, invests stone
The thin metal layer paster of wax composite phase-change material circular layer inwall, internal supporting shell, control unit and supply unit；Surface cover ring
Layer is superimposed composition, each paraffin composite phase change material circular layer inner wall surface from bottom to top for multiple paraffin composite phase change material circular layers
There is adiabatic wall to isolate between equal metal clad thin layer paster, each two paraffin composite phase change material circular layer；Inside support
Shell is on the inside of multilayer paraffin composite phase change material circular layer, for carrying multilayer paraffin composite phase change material circular layer, is hidden
Target is positioned over the intracavitary of internal supporting shell；Internal supporting shell is contacted with thin metal layer paster, while internal supporting shell corresponds to
It is drilled with aperture at each thin metal layer paster, small aperture is that 1 μm~1cm, depth are 1 μm~10cm；Install and lead in aperture
Line, wire one end is connected on thin metal layer paster, and the other end sequentially passes through control unit and supply unit ground connection, passes through manipulation
Control unit, regulates and controls heat time of the supply unit to every layer of paraffin composite phase change material circular layer, and then control different paraffin to answer
The mushy stage degree of conversion of paraffin composite phase change material in phase-change material circular layer is closed, every layer of paraffin composite phase change material can be made
The different bulk thermal conductivity constants of circular layer correspondence, realize the stealthy required three-dimensional thermal conductivity distribution of heat, and then hot-fluid is bypassed cape area
Behind domain, temperature field and thermoisopleth recover original distribution, realize hot stealthy function.
2. the stealthy cape of controllable Three Dimensional Thermal according to claim 1, it is characterised in that described paraffin composite phase change material
The shape for expecting circular layer is hemisphere, cone, cosine body, positive body with cord, cylinder, semiellipsoid, square, cuboid or six sides
Body, each paraffin composite phase change material circular layer independent control and work；The width of described paraffin composite phase change material circular layer
It is 20nm~10cm for 1 μm~10cm, thickness；Described paraffin composite phase change material circular layer is added in paraffin phase change material
Porous media.
3. the stealthy cape of controllable Three Dimensional Thermal according to claim 1 or 2, it is characterised in that described thin metal layer patch
Piece is Al pieces, Ag pieces, Au pieces, Cu pieces or Ni pieces, and its width is that 1 μm~10cm, thickness are 20nm~10cm.
4. the stealthy cape of controllable Three Dimensional Thermal according to claim 1 or 2, it is characterised in that described adiabatic wall
It is calcium silicates, polyalcohol/polyisocyanates, RPUF, polystyrene foam plastics, foam glass, In2O3、
SnO2Or ITO, its width is that 1nm~10cm, thickness are 1nm~10cm.
5. the stealthy cape of controllable Three Dimensional Thermal according to claim 3, it is characterised in that described adiabatic wall is silicon
Sour calcium, polyalcohol/polyisocyanates, RPUF, polystyrene foam plastics, foam glass, In2O3、SnO2
Or ITO, its width is that 1nm~10cm, thickness are 1nm~10cm.
6. the stealthy cape of controllable Three Dimensional Thermal according to claim 1,2 or 5, it is characterised in that described inside support
Shell is polyimides, plastics, BK7 optical glass, SiO2、Si3N4Or Al2O3；Described substrate layer is BK7 optical glass, SiO2、
Si3N4Or Al2O3。
7. the stealthy cape of controllable Three Dimensional Thermal according to claim 3, it is characterised in that described inside supporting shell is poly-
Imines, plastics, BK7 optical glass, SiO2、Si3N4Or Al2O3；Described substrate layer is BK7 optical glass, SiO2、Si3N4Or
Al2O3。
8. the stealthy cape of controllable Three Dimensional Thermal according to claim 4, it is characterised in that described inside supporting shell is poly-
Imines, plastics, BK7 optical glass, SiO2、Si3N4Or Al2O3；Described substrate layer is BK7 optical glass, SiO2、Si3N4Or
Al2O3。
9. the stealthy cape of controllable Three Dimensional Thermal according to claim 1,2,5,7 or 8, it is characterised in that described control
Unit is automatically controlled, light-operated, acoustic control or magnetic switch；Described supply unit is electric energy, heat energy, luminous energy or nuclear energy.
10. the stealthy cape of controllable Three Dimensional Thermal according to claim 1,2,5,7 or 8, it is characterised in that described multilayer
Paraffin composite phase change material circular layer is realized by Material growth technique, including the chemical gas of electron beam evaporation, metallo-organic compound
Phase precipitation, vapor phase epitaxial growth and molecular beam epitaxial method.
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| CN201710062112.3A CN107065383A (en) | 2017-01-31 | 2017-01-31 | A kind of stealthy cape of controllable Three Dimensional Thermal based on multilayer paraffin phase change material |
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|---|---|---|---|
| CN201710062112.3A CN107065383A (en) | 2017-01-31 | 2017-01-31 | A kind of stealthy cape of controllable Three Dimensional Thermal based on multilayer paraffin phase change material |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080024792A1 (en) * | 2006-07-25 | 2008-01-31 | John Pendry | Electromagnetic Cloaking Method |
| US20110085229A1 (en) * | 2009-10-13 | 2011-04-14 | Kent State University | Methods and Apparatus for Controlling Dispersions of Nanoparticles |
-
2017
- 2017-01-31 CN CN201710062112.3A patent/CN107065383A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080024792A1 (en) * | 2006-07-25 | 2008-01-31 | John Pendry | Electromagnetic Cloaking Method |
| US20110085229A1 (en) * | 2009-10-13 | 2011-04-14 | Kent State University | Methods and Apparatus for Controlling Dispersions of Nanoparticles |
Non-Patent Citations (4)
| Title |
|---|
| DANG MINH NGUYEN ET AL: "Active thermal cloak", 《APPLIED PHYSICS LETTERS》 * |
| RONG FENG WANG: "Switchable invisibility cloak, anticloak, transparent cloak, superscatterer, and illusion for the Laplace equation", 《PHYSICAL REVIEW B》 * |
| W. J. M. KORT-KAMP: "Tuning Plasmonic Cloaks with an External Magnetic Field", 《P H Y S I C A L R E V I E W L E T T E R S》 * |
| XUE BO YUAN ET AL: "Influence of nonlinear coordinate transformation on thermal cloaking performances of multilayered cylindrical thermal cloaks", 《AIP ADVANCES》 * |
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