CN107719630A - Laminate type gas sweating nose cone - Google Patents
Laminate type gas sweating nose cone Download PDFInfo
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- CN107719630A CN107719630A CN201710871383.3A CN201710871383A CN107719630A CN 107719630 A CN107719630 A CN 107719630A CN 201710871383 A CN201710871383 A CN 201710871383A CN 107719630 A CN107719630 A CN 107719630A
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- Prior art keywords
- sweating
- laminate
- nose cone
- gas
- laminated board
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- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Devices For Medical Bathing And Washing (AREA)
Abstract
The invention discloses a laminated gas sweating nose cone which comprises a laminated gas sweating nose cone structure and a gas generator, wherein the laminated gas sweating nose cone structure comprises a hollow circular base platform, the top surface of the circular base platform is provided with a laminated plate body, the gas generator is arranged in the circular base platform, the laminated plate body is formed by laminating a plurality of circular sweating laminated plates with the radiuses sequentially reduced along with the increase of the height, the centers of the plurality of sweating laminated plates are positioned on the same straight line, and the central circular holes of the plurality of sweating laminated plates are sequentially stacked to form a coolant flow channel. The coolant flow at each position of the sweating nose cone can be reasonably configured according to different cooling requirements indicated by the nose cone, so that the stability of the sweating flow on the heated surface is ensured, and the waste of the coolant is avoided; in addition, the solid medicine gas generator replaces a high-pressure gas storage tank gas supply system, so that the mass and the volume of the system are greatly reduced, and the response speed is improved.
Description
Technical field
The present invention relates to a kind of active temperature barrier cooled down for hypersonic aircraft nose cone, and in particular to
It is a kind of using laminated board type combustion gas sweating nose cone of the solid medicine combustion gas as Sweat coolling agent.
Background technology
Hypersonic aircraft can face severe Aerodynamic Heating environment at work, in points such as nose cone leading edge, noses of wing
Sharp position forms high hot-fluid, so as to destroy leading edge structure.When flying height is 25km, flying speed up to 6 Mach, radius is only 1 ~
Heat flow density is up to 4 ~ 5MW/m on 2mm leading edge nose cone2, wall surface temperature is up to 1600 ~ 1900K.In order to avoid aircraft nose
Cone burns because of too high temperature, and it is that extremely have must to take key positions such as the nose cones of aircraft effective thermal protection measure
Want.Sweat coolling thermal protection is to realize a kind of effective means of hypersonic aircraft nose cone and leading edge devices thermal protection.
Porous material Sweat coolling and veneer structure Sweat coolling can be divided into according to the difference of transpiration cooling material structure.
Two defects in the application be present in porous material Sweat coolling, and first, because the arbitrariness of porous material inner pore causes to lack
The ability of fluid control, second, the sensitiveness of hot spot, when overheated zone occurs in local uneven heating, overheated zone can not be prevented
Expand, veneer structure can be very good to overcome drawbacks described above.Veneer structure passes through Pervasion Weld Technology shape by substantial amounts of sheet metal
Integral configuration, sheet metal are carved with substantial amounts of cold as needed using advanced forming techniques such as chemistry engraving or laser engravings
But agent passage.Because flow channel can be with manual control, therefore the flow of cooling agent can accurately divide according to the distribution of hot-fluid
Match somebody with somebody, on the other hand, by artificial design, flow distribution structure is avoided the appearance of hot spot away from heat affected area.Patent application
Number pass through two kinds of floor for a kind of 201310112295.7 application for a patent for invention " laminated board type sweating and inverse spray combination cooling nose cone "
The laminate that plate is staggeredly superimposed globulate builds up body, and the distributed gap jet pipe for passing through veneer structure produces the high speed spray of multilayered state
Emanate stream, using good runner configuration possessed by laminate self structure, overcoming general porous material Sweat coolling structure can
The defects of hot-spot can occur, reach the reusable purpose of heating part, and enter at the top of nose cone using counter-flow jets
Row cooling, strengthen the cooling effect of stagnation region.But this patent provides the inverse cooling agent sprayed with sweating due to needing simultaneously,
Therefore two sets of cooling agent supply systems of configuration are needed, and the supply of a cooling agent inherently problem.
The supply of cooling agent is a key issue of Sweat coolling, in order to preferably adapt to flying for hypersonic aircraft
Row quality and size requirement, supply system should possess the characteristics of small volume, light weight.Secondly, the response speed of supply system and
Stability should meet the requirement of thermal protection system.Conventional gas supply system is typically by high pressure tank, vent valve, slow pressure
A few part compositions such as air accumulator, stabipack, magnetic valve, spout and connector, its operation principle are stored in high pressure tank
In gases at high pressure be discharged into by vent valve in slow pressure air accumulator by the decompression and voltage stabilizing of stabipack, given in control system
After going out instruction, magnetic valve is opened, and gas sprays through spout.But conventional gas supply system is stored up equipped with the larger high pressure of quality
Device of air, it is difficult to using on board the aircraft, and gas is stored in high pressure tank, it is difficult to and avoid the occurrence of gas leakage and ask
Topic.
The content of the invention
It is an object of the invention to provide a kind of laminated board type combustion gas sweating Nose structure of solid medicine combustion gas sweating, using solid
Cooling agent of the body medicine combustion gas as sweating, the reasonable distribution of coolant flow is realized, avoids the waste of cooling agent, while solve gas
The problem of body supply system weight is big, space-consuming is big.
In order to solve the above technical problems, the technical solution adopted in the present invention is：A kind of laminated board type combustion gas sweating nose cone, bag
Laminated board type Nose structure and gas generator are included, the laminated board type Nose structure includes hollow circular base frame, the circular base
Countertop builds up body provided with laminate, and the gas generator is installed in circular base frame, it is characterised in that the laminate builds up body
The annular sweating laminate being sequentially reduced by polylith with height increase radius is formed by stacking, the centre bit of the polylith sweating laminate
In on same straight line, the center hole of the polylith sweating laminate stacks gradually composition coolant flow passage；Every piece of hair
Sweat lamina surface is carved with N bars along the radially-arranged runner of sweating laminate, the N bars uniform flow passage distribution；Per M block sweating laminates
Form a laminate and stack the cycle, the angle to stagger between the adjacent channels of latter block of sweating laminate and previous block of sweating laminate is；
Wherein, N, M are positive integer.
One laminate stacks the cycle and refers to that sweating laminate block-by-block rotates towards a direction, and corresponding runner returns to original position institute
The sweating laminate block number needed.
Preferably, the internal diameter of the sweating laminate reduces with the reduction away from vertex distance, such coolant channel
Diameter is gradually reduced from the inside to the outside.
Further, the gas generator includes match with circular base frame and the shell and igniter of a side opening, this
Open side is provided with outlet end cap, and the hole connected with coolant flow passage is offered on outlet end cap；Be provided with the shell with
Shell is separated into pressure buffer chamber and combustion chamber by the parallel gas treatment layer of sweating laminate, the gas treatment layer, in combustion chamber
Filled with gas-forming agent, the igniter stretches to top of combustion chamber at outer casing end axle center.
The gas treatment layer is made up of 2 ~ 3 layers of microporous filter screen, and the aperture of the microporous filter screen is 50 ~ 300 μm.It is excellent
Selection of land, aperture are 50 ~ 150 μm.
Further, the gas-forming agent is made up of gas generating agent, binding agent, cooling agent and properties modifier, gas production
Gas agent answers that comprehensive selection ignition temperature is low, and flameholding, burn rate is controllable, the few solid medicine of residue.
Further, the gas-forming agent is formulated based on double base propellant NC/NG and extender plasticizer FZ, then
Add appropriate reduction of speed cooling agent, wherein NC/NG/FZ accountings about 65%, reduction of speed cooling agent accounting about 35%.
Further, the sweating laminate is provided with 8 runners, and the angle of adjacent channels is 45 °.
Further, every 4 blocks of sweating laminates form a laminate and stack the cycle, between the adjacent channels of adjacent sweating laminate
Angle be 11.25 °.
Further, the width of the runner gradually increases from inside to outside.
In general Mechanical microwells and porous material are when the situation of hot-spot occurs in heating surface, because local skeleton is heated
Expansion, sweating working medium here flow resistance increase, local sweating flow will reduce, occur hot-spot area expansion and
Deteriorate.But use this structure due to runner be in interior narrow outer width flaring type runner, therefore flow resistance be concentrated mainly in
The narrow flow passage area in portion, when surface hot-spot, local resistance is caused to increase, but because increased resistance is relative to stream
The overall resistance proportion very little in road, therefore the change of flow will not be caused, so as to avoid the appearance of hot spot.
Further, the depth of the runner is 0.4 ~ 0.5mm, and the bottom of body, the depth of runner are built up closer to laminate
（That is recessed depth of the runner in sweating lamina surface）It is smaller.
Further, the thickness of described circular sweating laminate is 0.5 ~ 1mm, it is preferable that builds up body closer to laminate
Top, the thickness of sweating laminate are thinner..
Further, the laminate builds up the top of body and is provided with arc-shaped main header casing, and the center of the main header casing offers circle
Shape sweating hole.
The ratio that runner exit area accounts for sweating laminate exterior surface area increases with the reduction away from vertex distance, to ensure
Bigger coolant flow can be being provided by subapical high heat flux regions.
During work, igniter lights gas-forming agent, and gas-forming agent burns rapidly, and caused combustion gas passes through gas treatment
The processing of layer, the residue of burning is on the one hand filtered out, physics cooling on the other hand is carried out to combustion gas, obtains the combustion gas of no residue.
Combustion gas enters laminate by gas generator outlet and builds up the hollow structure in internal portion, finally by the runner inside laminate from nose
Poppet surface flows out, and realizes the thermal protection function to nose cone.
Laminate sweating techniques and gas generator solid medicine gas supply technology are combined together by the present invention, are proposed a kind of
New laminated board type combustion gas sweating nose cone, high pressure tank different from the past supply, but will be fired caused by the burning of solid medicine
Source of the gas of the gas as sweating, the high speed jet-stream wind of multilayered state is produced by the distributed gap jet pipe of veneer structure, realized
The protection of nose cone heating surface.
Compared with prior art, the present invention has the advantages that：
（1）Using sweating veneer structure inner flow passage can flexible design the advantages of, accurately control the runner structures of different sweating laminates
Type so that the resistance of runner changes with the difference of sweating laminate position, so as to control the flow of different laminates, meets
The cooling requirement of nose cone surface diverse location, ensure the strong stabilization of generating surface sweating stream.It can both be overcome using veneer structure more
There is the defects of hot-spot in Porous materials Sweat coolling, can realize the reasonable distribution of coolant flow again, avoid cooling agent
Waste.
（2）High pressure tank air supply system is substituted with solid medicine gas generator, greatly reduces the quality of air supply system；Gas
Body generator is joined directly together with veneer structure, saves the space that system takes；And system response time is fast, no disclosure risk.
Brief description of the drawings
Fig. 1 is a kind of stereogram of laminated board type combustion gas sweating nose cone of the present invention.
Fig. 2 is a kind of cross-sectional view of laminated board type combustion gas sweating nose cone of the present invention.
Fig. 3 is a kind of laminated board type Nose structure stereogram of the present invention.
Fig. 4 is a kind of schematic diagram of sweating veneer structure of the present invention.
Fig. 5 is a kind of stacked system schematic diagram of sweating laminate of the present invention.
Embodiment
Fig. 1 to Fig. 5 shows a kind of dependency structure of laminated board type combustion gas sweating nose cone of the present invention, specifically, the sweating
Nose cone includes laminated board type Nose structure 1 and gas generator 2, and the laminated board type Nose structure 1 includes hollow circular base frame 11,
The top surface of circular base frame 11 builds up body 12 provided with laminate, and the gas generator 2 is installed in circular base frame 11, the laminate
Build up the coaxial rotating of annular sweating laminate 15 that body 12 is sequentially reduced by polylith with height increase radius to be staggeredly formed by stacking, institute
The center hole for stating polylith sweating laminate 15 stacks gradually composition coolant flow passage 17；The surface engraving of sweating laminate 15
There are 8 to be uniformly distributed along the radially-arranged runner 16 of sweating laminate, center of 8 runners 16 along sweating laminate 15；Every 4 pieces
Sweating laminate 15 forms a laminate and stacks the cycle, and the angle between the adjacent channels 16 of adjacent two blocks of sweating laminates is
11.25°。
Wherein, the gas generator 2 includes matching with circular base frame 11 and the shell of a side opening 23 and igniter 21,
The open side is provided with outlet end cap 27, and the hole connected with coolant flow passage 17 is offered on outlet end cap 27；The shell
The gas treatment layer 25 parallel with sweating laminate 15 is provided with 23, shell 23 is separated into pressure buffer chamber by the gas treatment layer 25
26 and combustion chamber 24, gas-forming agent is filled with combustion chamber 24, and the igniter 21 goes out to stretch to from the end axle center of shell 23
The top of combustion chamber 24.Preferably, outlet end cap is integrated with barrel shrond design, outlet end cap 27 and barrel shrond 22
Connected by the way of welding.Preferably, igniter 21 uses general electric igniter, is connected using bolt 22 from barrel shrond
Top of combustion chamber igniting is inserted at the axle center of end, to cause the gas-forming agent in combustion chamber to do aspect combustion vertically as far as possible
Burn.
The gas treatment layer 25 is made up of 3 layers of microporous filter screen, and the aperture of the microporous filter screen is 100 μm.
Pyrotechnic gas-forming agent, the propellant of the preferred low burning rate low burn temperature of gas-forming agent are loaded in combustion chamber 24.Institute
State gas-forming agent to be formulated based on double base propellant NC/NG and extender plasticizer FZ, add appropriate reduction of speed cooling
Agent, wherein NC/NG/FZ accountings about 65%, reduction of speed cooling agent accounting about 35%.
The angle of adjacent channels 16 is 45 ° on the sweating laminate 15；The width of the runner 16 gradually increases from inside to outside
Greatly.The internal diameter of sweating laminate 15 reduces with external diameter with the reduction away from vertex distance.
The depth of the runner 16 is 0.4 ~ 0.5mm；The thickness of described circular sweating laminate 15 is 0.5 ~ 1mm.
The top that the laminate builds up body 12 is provided with arc-shaped main header casing 13, and the center of the main header casing 13 offers circular hair
Pore 14.
Claims (10)
1. a kind of laminated board type combustion gas sweating nose cone, including laminated board type Nose structure（1）And gas generator（2）, the laminated board type
Nose structure（1）Including hollow circular base frame（11）, the circular base frame（11）Top surface builds up body provided with laminate（12）, it is described
Gas generator（2）It is installed in circular base frame（11）It is interior, it is characterised in that the laminate builds up body（12）Increased by polylith with height
Add the annular sweating laminate that radius is sequentially reduced（15）It is formed by stacking, the polylith sweating laminate（15）It is centrally located at same
On straight line, the polylith sweating laminate（15）Center hole stack gradually composition coolant flow passage（17）；Described in every piece
Sweating laminate（15）Surface engraving has N bars along the radially-arranged runner of sweating laminate（16）, the N bars runner（16）Uniformly divide
Cloth；Per M block sweating laminates（15）Form a laminate and stack the cycle, latter block of sweating laminate is adjacent with previous block of sweating laminate
Runner（16）Between the angle that staggers be；
Wherein, N, M are positive integer.
2. laminated board type combustion gas sweating nose cone according to claim 1, it is characterised in that the gas generator（2）Including
With circular base frame（11）Matching and the shell of a side opening（23）And igniter（21）, the open side is provided with outlet end cap（27）,
Outlet end cap（27）On offer and coolant flow passage（17）The hole of connection；The shell（23）It is interior to be provided with and sweating laminate
（15）Parallel gas treatment layer（25）, the gas treatment layer（25）By shell（23）It is separated into pressure buffer chamber（26）And burning
Room（24）, combustion chamber（24）It is interior to be filled with gas-forming agent, the igniter（21）From shell（23）End stretches at axle center
Combustion chamber（24）Top.
3. laminated board type combustion gas sweating nose cone according to claim 2, it is characterised in that the gas treatment layer（25）By 2 ~
3 layers of microporous filter screen composition, the aperture of the microporous filter screen is 50 ~ 300 μm.
4. laminated board type combustion gas sweating nose cone according to claim 2, it is characterised in that the gas-forming agent is pushed away with biradical
Enter based on agent NC/NG and extender plasticizer FZ and be formulated, add appropriate reduction of speed cooling agent, wherein NC/NG/FZ accountings about
65%, reduction of speed cooling agent accounting about 35%.
5. laminated board type combustion gas sweating nose cone according to claim 1, it is characterised in that the sweating laminate（15）It is provided with
8 runners（16）, adjacent channels（16）Angle be 45 °.
6. laminated board type combustion gas sweating nose cone according to claim 5, it is characterised in that every 4 blocks of sweating laminates（15）Form
One laminate stacks the cycle, and the angle between the adjacent channels of adjacent sweating laminate is 11.25 °.
7. laminated board type combustion gas sweating nose cone according to claim 1, it is characterised in that the runner（16）Width by interior
Outwards gradually increase.
8. the laminated board type combustion gas sweating nose cone according to any one of claim 1 ~ 7, it is characterised in that the runner（16）'s
Depth is 0.4 ~ 0.5mm.
9. the laminated board type combustion gas sweating nose cone according to any one of claim 1 ~ 7, it is characterised in that described circular sweating
Laminate（15）Thickness be 0.5 ~ 1mm.
10. the laminated board type combustion gas sweating nose cone according to any one of claim 1 ~ 7, it is characterised in that the laminate is built up
Body（12）Top be provided with arc-shaped main header casing（13）, the main header casing（13）Center offer circular sweating hole（14）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710871383.3A CN107719630B (en) | 2017-09-25 | 2017-09-25 | Laminate type gas sweating nose cone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710871383.3A CN107719630B (en) | 2017-09-25 | 2017-09-25 | Laminate type gas sweating nose cone |
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| Publication Number | Publication Date |
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| CN107719630A true CN107719630A (en) | 2018-02-23 |
| CN107719630B CN107719630B (en) | 2019-08-16 |
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| CN201710871383.3A Active CN107719630B (en) | 2017-09-25 | 2017-09-25 | Laminate type gas sweating nose cone |
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Cited By (3)
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| CN109812352A (en) * | 2019-03-06 | 2019-05-28 | 中南大学 | Rocket ejector and its thermal protection structure and thermal protection method |
| CN112765913A (en) * | 2021-04-08 | 2021-05-07 | 中国空气动力研究与发展中心计算空气动力研究所 | Layered gradient porous material sweating cooling structure and aircraft |
| WO2022051912A1 (en) * | 2020-09-08 | 2022-03-17 | 西门子股份公司 | Laval nozzle and manufacturing method therefor |
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|---|---|---|---|---|
| CN109812352A (en) * | 2019-03-06 | 2019-05-28 | 中南大学 | Rocket ejector and its thermal protection structure and thermal protection method |
| WO2022051912A1 (en) * | 2020-09-08 | 2022-03-17 | 西门子股份公司 | Laval nozzle and manufacturing method therefor |
| CN112765913A (en) * | 2021-04-08 | 2021-05-07 | 中国空气动力研究与发展中心计算空气动力研究所 | Layered gradient porous material sweating cooling structure and aircraft |
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| Publication number | Publication date |
|---|---|
| CN107719630B (en) | 2019-08-16 |
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