CN109572985A - A kind of micro- truss thermal protection panel containing dual channel - Google Patents
A kind of micro- truss thermal protection panel containing dual channel Download PDFInfo
- Publication number
- CN109572985A CN109572985A CN201811438814.8A CN201811438814A CN109572985A CN 109572985 A CN109572985 A CN 109572985A CN 201811438814 A CN201811438814 A CN 201811438814A CN 109572985 A CN109572985 A CN 109572985A
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- China
- Prior art keywords
- micro
- truss
- panel
- brace
- thermal protection
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C1/06—Frames; Stringers; Longerons ; Fuselage sections
- B64C1/061—Frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C1/38—Constructions adapted to reduce effects of aerodynamic or other external heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C1/40—Sound or heat insulation, e.g. using insulation blankets
Abstract
The present invention is a kind of micro- truss thermal protection panel containing dual channel, including multiple unit cells, the unit cell includes top panel and lower panel, and top panel and lower panel are arranged in parallel, micro- truss is provided between the top panel and lower panel, two upper runners are horizontally arranged between the top panel and micro- truss, two lower flow channels are horizontally arranged between the lower panel and micro- truss, and upper runner and lower flow channel lateral separation are arranged in a staggered manner, micro- truss includes first crossbar, second crossbar, first brace, second brace and eight third braces, two first crossbars are horizontally installed on the front and rear sides of upper runner respectively, two second crossbars are horizontally installed on the front and rear sides of lower flow channel respectively.The multifunction of thermal protection panel is realized in the invention, promotes thermal protective performance on the basis of guaranteeing bearing function, proposes a kind of micro- truss sandwich panel containing dual channel, which has active heat removal and carrying integrated function.
Description
Technical field
The present invention relates to it is long when the thermal protection technology field heated, specially a kind of micro- truss heat containing dual channel is anti-
Protection slab.
Background technique
Advanced aircraft structure-design technique from " performance oriented " to " towards function " changes, this makes aircraft knot
Structure will also have both the other functions such as anti-/ heat-insulated, vibration damping, stealthy in addition to bearing function.Reasonable design structural configuration, realizes it
Multifunction is the effective means of lift structure performance.Hypersonic aircraft is needed in long Shi Hanghang or during reenter
Aircraft surface installs thermal protection system additional, to guarantee that received heat does not corrode internal structure.With to hypersonic aircraft structure
The continuous improvement of efficiency requirements, thermal protection system also gradually develop to carrying with anti-heat-insulation integrative direction from anti-heat insulating function.
Covering, thermal protection and the corresponding support system of the integrated alternative conventional airframe of thermal protection system, internal structure have very
Strong shock resistance traumatic resistance energy, integral panels size is larger, and assembling is strong and easy to maintain, and flight will be all greatly improved in these
The structure efficiency of device and safety are a trend of hypersonic aircraft thermal protection system development.
Currently, typical integration thermal protection system organization plan mainly includes two types.One kind being based on ripple sandwich
The heat protection design scheme of plate, the stuffed heat insulated sandwich inside corrugated plating are cut on the basis of heat-insulated using corrugated sandwich board height
The mechanical property of face the moment of inertia promotion thermal protection panel.This kind of scheme has more apparent hot short circuit phenomenon at web, such as
Where guarantee to reduce the difficult point that hot short-circuiting effect is this conceptual design while bearing capacity.In addition, web is connected to
Inside and outside panel has very high temperature gradient, if this scheme is used for high-temperature region, the web temperature with outer panels contact position may
Its use scope can be exceeded.Second of integrated thermal protection system structure type is rigid heat insulating strip sandwich integration thermal protection knot
Structure scheme, rigid thermal insulation tile and clad are provided for good load performance.The program still remains hot short circuit phenomenon, and
And preparation process is complicated.
Above two integration thermal protection structure scheme is all to reach thermal protection by structure and its sandwich itself heat absorption
Purpose.During hypersonic aircraft reenters, when surface heat flux reaches maximum, it can guarantee by the heat absorption of sandwich
Internal panel temperature is still lower.However, continuing along with the process that reenters, internal panel temperature can constantly increase, this mistake
Journey can continue to a very long time after the process of reentering.At this point, if internal structure is stored in without corresponding cooling mechanism
Heat in sandwich structure can continue internally structure conduction and make internal structure that may use temperature beyond it.In addition, right
In the hypersonic long-range vehicle with long endurance, although its surface heat flux is so acute not as good as Spacecraft reentry process
It is strong, but since its cruise time is longer, cause total heating amount very big, it can not be merely by the heat sink of structure and its sandwich part
Achieve the purpose that thermal protection.So developing the integrated thermal protection panel with active cooling mechanism to hypersonic distance flight
Utensil is significant.
The heating process with the hypersonic long-range vehicle of overlength endurance is considered, although there is the runner below outer panels
Carry out active cooling, if but cooling effect cannot take away enough heats, backing material will be caused to heat up, and extra heat is passed
Internal structure is passed, the temperature of internal structure may then exceed its operating limit.At this point, being simutaneously arranged cooling in inner panel
Runner can take away this partial heat, most important to the safety for guaranteeing Flight Vehicle Structure.
Summary of the invention
The purpose of the present invention is to provide a kind of micro- truss thermal protection panel containing dual channel, the thermal protection panel is for tool
There are long Shi Jiare, the especially actual demand of overlength endurance hypersonic aircraft thermal protection structure, realizes thermal protection panel
Multifunction promotes thermal protective performance on the basis of guaranteeing bearing function, proposes a kind of micro- truss sandwich panel containing dual channel,
The panel has active heat removal and carrying integrated function.
To achieve the above object, the invention adopts the following technical scheme: the present invention provides a kind of micro- truss containing dual channel
Thermal protection panel, including multiple unit cells, the unit cell includes top panel and lower panel, and top panel and lower panel are arranged in parallel,
It is provided with micro- truss between the top panel and lower panel, two upstream are horizontally arranged between the top panel and micro- truss
Road is horizontally arranged with two lower flow channels between the lower panel and micro- truss, and upper runner and lower flow channel lateral separation are staggered and set
It sets.
Micro- truss includes first crossbar, second crossbar, the first brace, the second brace and eight third braces, and two
The first crossbar is horizontally installed on the front and rear sides of upper runner respectively, and two second crossbars are horizontally installed on dirty respectively
The front and rear sides in road, second crossbar setting in front side is there are two the first brace, and two the first braces intersections are described in the rear side
In first crossbar, the setting of the rear side second crossbar is there are two the second brace, and two the second braces intersections are in front side described the
On one cross bar, first brace and the second brace are disposed adjacent, and it is oblique that two second crossbars are respectively arranged with two pairs of thirds
Bar, and the intersection of each pair of third brace, in ipsilateral first crossbar, it is opposite that first brace or the second brace are located at front and back
Two pairs of third braces between.
The cross section of the upper runner and lower flow channel is triangle or arch.
It is provided with gap between the two neighboring upper runner, is provided with gap between the two neighboring lower flow channel.
The optional liquid of cooling fluid or gas in the upper runner and lower flow channel under working condition.
The material of the top panel is high temperature alloy, C/C or SiC/SiC with high radiant rate, the material of the lower panel
Matter is the heat sink higher material such as aluminium alloy, the material of the upper runner, lower flow channel and micro- truss be Ti alloy, high temperature alloy or
Zirconium oxide.
A kind of beneficial effect of micro- truss thermal protection panel containing dual channel of the present invention is:
The invention is a kind of micro- truss thermal protection panel containing dual channel, can be made into random length, and its along runner direction
Surface shape can be made curve form with actual needs, along perpendicular to runner direction also it is expansible go out a plurality of runner to cover needs
The range of thermal protection；During the arrangement of dual channel may be used on the thermal protection with overlength heating time in the present invention, than only
Lead to cooling fluid with better cooling effect in upper runner, and it is relatively easy to flow control；Realize more function of thermal protection panel
Energyization promotes thermal protective performance on the basis of guaranteeing bearing function, which has active heat removal and carrying integrated function.
Detailed description of the invention
Fig. 1 is single cell structure stereoscopic schematic diagram of the invention；
Fig. 2 is single cell structure right side view of the invention；
Fig. 3 is the overall thermal protection face board structural upright schematic diagram extended by laterally 5 and longitudinal 5 unit cells；
Fig. 4 is the overall thermal protection face board structure of the main view extended by laterally 5 and longitudinal 5 unit cells；
Fig. 5 is micro- truss schematic perspective view of the invention；
In figure: 1, top panel, 2, lower panel, 3, micro- truss, 31, first crossbar, 32, second crossbar, the 33, first brace,
34, the second brace, 35, third brace, 4, upper runner, 5, lower flow channel.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figures 1 to 5, the present invention provides a kind of micro- truss thermal protection panel containing dual channel, including multiple unit cells,
Unit cell includes top panel 1 and lower panel 2, and top panel 1 and lower panel 2 are arranged in parallel, and are arranged between top panel 1 and lower panel 2
There is micro- truss 3, two upper runners 4 are horizontally arranged between top panel 1 and micro- truss 3, between lower panel 2 and micro- truss 3 laterally
There are two lower flow channels 5 for setting, and upper runner 4 and 5 lateral separation of lower flow channel are arranged in a staggered manner.
In the present embodiment, since the position of upper runner 4 and lower flow channel 5 is arranged in a staggered manner, each unit cell includes two complete
Whole upper runner 4, a complete lower flow channel 5 and 5 two sides of lower flow channel are symmetrically arranged with half of lower flow channel 5, make in this way from
The path that top panel 1 is transmitted to lower panel 2 extends, that is, extends the transmission path of heat；2 edge of top panel 1 and lower panel
Upper runner 4 and 5 direction of lower flow channel have scalability, according to actual requirement of engineering can appropriate adjustment unit cell along runner direction length
Degree, and curve form can be made with actual needs in its surface shape；Top panel 1 and lower panel 2 are along perpendicular to upper runner 4 and flowing down
5 direction of road also has scalability, according to actual requirement of engineering can the width of appropriate adjustment runner and the gap width of each runner transverse direction,
Increase the range that thermal protection needs, the overall thermal protection face extended by laterally 5 and longitudinal 5 unit cells is used in the present invention
Plate, it is specific as shown in Figure 3 and Figure 4；The upper runner 4 and lower flow channel 5 of thermal protection panel can work independently, in the lesser area of heating amount
Domain, controllable cooling fluid only flow through upper runner 4, and in the biggish region of heating amount, it controls cooling fluid and simultaneously flows through upstream
Road 4 and lower flow channel 5.
As shown in figure 5, micro- truss 3 includes first crossbar 31, second crossbar 32, the first brace 33, the second brace 34 and eight
A third brace 35, two first crossbars 31 are horizontally installed on the front and rear sides of upper runner 4 respectively, and two second crossbars 32 are distinguished
It is horizontally installed on the front and rear sides of lower flow channel 5, the setting of front side second crossbar 32 is there are two the first brace 33, and two the first braces
33 intersections are in rear side first crossbar 31, and the setting of rear side second crossbar 32 is there are two the second brace 34, and two the second braces 34
Intersection is in front side first crossbar 31, and the first brace 33 and the second brace 34 are disposed adjacent, and two second crossbars 32 are respectively set
There are two pairs of third braces 35, and each pair of third brace 35 intersects first brace 33 or second in ipsilateral first crossbar 31
Brace 34 is located between two pairs of opposite third braces 35 of front and back.
In the present embodiment, each pair of third brace 35 is arranged with second crossbar 32 in isosceles triangle, each pair of third brace 35
Crosspoint and vertex close to upper runner 4, and the bottom end of each pair of third brace 35 third brace 35 with adjacent side respectively
Bottom extremity in the upside on 6 vertex of lower flow channel；First crossbar 31 and second crossbar 32 arrange in vertical direction with runner, will be by
The heat load and power load that upper runner 4 transmits horizontally are redistributed, and the heat on micro- truss 3 is carried and continues to pass to down with power load
Runner 5 and lower panel 2；First crossbar 31 and second crossbar 32 are position difference and the identical rod piece of material, by first crossbar 31
It is made as hollow rod or I-shaped rod piece with second crossbar 32, structural-load-carrying capacity can be improved and mitigate construction weight；Micro- truss
On the first brace 33 and the second brace 34 act in first crossbar 31 and second crossbar 32, play runner and micro- truss it
Between transmit and redistribute the effect of load and kept away by the load transmission of top panel 1 and upper runner 4 to lower flow channel 5 and lower panel 2
If having exempted from longitudinally disposed first brace 33 and the phenomenon that the second brace 34 causes load to be unevenly distributed, through Mechanics Performance Testing,
The set-up mode of the brace makes micro- truss structure form have good bearing capacity, and also shows under temperature loading effect
Good flexural property out, increases heat transfer path to greatest extent, has a large amount of inner spaces, can be used for other function application
Arrangement；1 thickness of the upper surface of thermal protection panel plate, 2 thickness of lower panel, micro- truss member radius, micro- truss member length, runner
The visual concrete condition such as angle between upper face 1 and lower panel 2 is designed, and reaches best by adjusting relevant parameter
Performance.
As shown in Figure 1, the cross section of upper runner 4 and lower flow channel 5 is triangle or arch.
In the present embodiment, if top panel 1 and lower panel 2 are plate, upper runner 4 and lower flow channel 5 are designed as isoceles triangle
Shape, upper runner 4 is in inverted triangle shape at this time, and lower flow channel 5 is in positive triangle shape, to increase the contact between fluid and panel in runner
Area, enhances the effect of heat convection, and the corner angle that runner is contacted with first crossbar 31 and second crossbar 32 is designed as 45o~
75oBetween；If top panel 1 and lower panel 2 are curve form, such as aerofoil surface need to be maintained pneumatically outer when aerofoil surface is laid with
Shape need to be set as curved surface, and it is three that flow channel shape, which can be arranged, in upper runner 4 and lower flow channel 5 according to the specific bending degree of panel surface
Angular or arch.
Shown in as shown in Figure 1, Figure 3 and Figure 4, gap is provided between multiple upper runners 4, between being provided between multiple lower flow channels 5
Gap.
In the present embodiment, do not need closely to connect between two neighboring runner, it can there are one section of gaps, it is ensured that can
Under the premise of taking away panel heat in time, the quantity of runner is reduced, to achieve the purpose that loss of weight.
The optional liquid of cooling fluid or gas in upper runner 4 and lower flow channel 5 under working condition.
In the present embodiment, ambient temperature is set and runner initial temperature is 0 DEG C, panel emissivity is 0.85, is added when taking long
The heat flow density load of heat is 31000W/m3, convection transfer rate 80W/m2The convection transfer rate of/K, inner air is
20W/m2/ K, the mass flow in flow tube are 0.002kg/s, and the maximum temperature of entire panel is 228 DEG C, appear in top panel 1
Right end, by the further cooling of lower flow channel 5, the heat for being transmitted to lower panel 2 is less, maximum temperature 28.6
DEG C, it is equally present in the right end of lower face 2；Thermal protection panel working method is that active cooling needs in the operating condition
Lead to cooling fluid in runner, which, which regards concrete condition, can be selected liquid or gas, and thermal protection panel, which is used in, has overlength endurance
Hypersonic long-range vehicle heating process in when, if using liquid as cooling fluid, the oil entrained by it can be used
Liquid is recycled as coolant liquid, if using air as cooling fluid, which can be from air intake duct bleed, and is participating in
It is discharged in time after complete cooling, and the heat in structure is taken away.
The material of top panel 1 is high temperature alloy, C/C or SiC/SiC with high radiant rate, and the material of lower panel 2 is aluminium
Alloy etc. is heat sink higher material, the material of upper runner 4, lower flow channel 5 and micro- truss 3 are Ti alloy, high temperature alloy or zirconium oxide.
In the present embodiment, the heat-resisting ability of thermal protection panel can be promoted using the above material.
A kind of course of work of micro- truss active cooling thermal protection panel containing dual channel is as follows:
In the operating condition, control cooling fluid simultaneously flows through upper runner 4 and lower flow channel 5, is carried by the heat that upper runner 4 transmits
It is loaded in first crossbar 31 and second crossbar 32 and redistributes with power, and then by the first brace 33, the second brace 34 on micro- truss 3
It is carried with the heat of third brace 35 and power load continues to pass to lower flow channel 5 and lower panel 2, increase heat transmitting road to greatest extent in this way
Diameter has better cooling effect, and flowing control is relatively easy, improves thermal protection on the basis of guaranteeing bearing function
Energy.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of micro- truss thermal protection panel containing dual channel, it is characterised in that: including multiple unit cells, the unit cell includes above
Plate and lower panel, and top panel and lower panel are arranged in parallel, are provided with micro- truss between the top panel and lower panel, it is described on
It is horizontally arranged with two upper runners between panel and micro- truss, two are horizontally arranged between the lower panel and micro- truss and is flowed down
Road, and upper runner and lower flow channel lateral separation are arranged in a staggered manner.
2. a kind of micro- truss thermal protection panel containing dual channel according to claim 1, it is characterised in that: micro- truss
Including first crossbar, second crossbar, the first brace, the second brace and eight third braces, two first crossbars are horizontal respectively
To the front and rear sides that upper runner is arranged in, two second crossbars are horizontally installed on the front and rear sides of lower flow channel, front side respectively
There are two the first braces for the second crossbar setting, and two the first braces intersect the rear side institute in the rear side first crossbar
Stating second crossbar setting, there are two the second braces, and two the second braces intersect in the first crossbar of front side, and described first
Brace and the second brace are disposed adjacent, and two second crossbars are respectively arranged with two pairs of third braces, and each pair of third brace
Intersection in ipsilateral first crossbar, first brace or the second brace be located at two pairs of opposite third braces of front and back it
Between.
3. a kind of micro- truss thermal protection panel containing dual channel according to claim 1, it is characterised in that: the upper runner
Cross section with lower flow channel is triangle or arch.
4. a kind of micro- truss thermal protection panel containing dual channel according to claim 1, it is characterised in that: two neighboring institute
It states and is provided with gap between upper runner, be provided with gap between the two neighboring lower flow channel.
5. a kind of micro- truss thermal protection panel containing dual channel according to claim 1, it is characterised in that: the upper runner
With the optional liquid of cooling fluid or gas under working condition in lower flow channel.
6. a kind of micro- truss thermal protection panel containing dual channel according to claim 1, it is characterised in that: the top panel
Material be high temperature alloy, C/C or SiC/SiC with high radiant rate, the material of the lower panel be aluminium alloy etc. it is heat sink compared with
High material, the material of the upper runner, lower flow channel and micro- truss are Ti alloy, high temperature alloy or zirconium oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811438814.8A CN109572985A (en) | 2018-11-28 | 2018-11-28 | A kind of micro- truss thermal protection panel containing dual channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811438814.8A CN109572985A (en) | 2018-11-28 | 2018-11-28 | A kind of micro- truss thermal protection panel containing dual channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109572985A true CN109572985A (en) | 2019-04-05 |
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ID=65924953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811438814.8A Pending CN109572985A (en) | 2018-11-28 | 2018-11-28 | A kind of micro- truss thermal protection panel containing dual channel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112193402A (en) * | 2020-09-16 | 2021-01-08 | 北京宇航系统工程研究所 | Constant-temperature heat shield structure capable of being stored for long time |
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| CN105667837A (en) * | 2015-09-15 | 2016-06-15 | 大连理工大学 | Pyramid micro-truss laminboard type bearing and thermal protection integrated structure containing runners |
| CN106114915A (en) * | 2016-08-26 | 2016-11-16 | 西安融智航空科技有限公司 | A kind of safeguard structure of interconnected carrying heat-insulation integrative |
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| CN112193402A (en) * | 2020-09-16 | 2021-01-08 | 北京宇航系统工程研究所 | Constant-temperature heat shield structure capable of being stored for long time |
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Application publication date: 20190405 |