CN107719630B - Laminate type gas sweating nose cone - Google Patents
Laminate type gas sweating nose cone Download PDFInfo
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- CN107719630B CN107719630B CN201710871383.3A CN201710871383A CN107719630B CN 107719630 B CN107719630 B CN 107719630B CN 201710871383 A CN201710871383 A CN 201710871383A CN 107719630 B CN107719630 B CN 107719630B
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- sweating
- laminate
- gas
- nose cone
- 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
Cooling active temperature barrier is carried out for hypersonic aircraft nose cone the present invention relates to a kind of, and in particular to
A kind of laminated board type combustion gas sweating nose cone using the combustion gas of solid medicine as Sweat coolling agent.
Background technique
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, 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 the leading edge nose cone of 2mm2, wall surface temperature is up to 1600 ~ 1900K.In order to avoid aircraft nose
Cone is burnt because of excessively high temperature, and taking effective thermal protection measure to key positions such as the nose cones of aircraft is that extremely have must
It wants.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.
There are two defects in the application in porous material Sweat coolling, and first, since the arbitrariness of porous material inner pore causes to lack
The ability of fluid control, second, the sensibility of hot spot can not prevent overheated zone when overheated zone occurs in local uneven heating
Expand, veneer structure can be very good to overcome drawbacks described above.Veneer structure passes through Pervasion Weld Technology shape by a large amount of sheet metal
Integral configuration, sheet metal are carved with a large amount of cold as needed using advanced forming techniques such as chemistry engraving or laser engravings
But agent channel.Since flow channel can accurately can divide taking human as control, the flow of coolant according to the distribution of hot-fluid
Match, on the other hand, by artificial design, makes flow distribution structure far from heat affected area, avoid the appearance of hot spot.Patent application
Number pass through two kinds of floor for a kind of 201310112295.7 application for a patent for invention " cooling nose cone is combined in laminated board type sweating and inverse spray "
Plate is staggeredly superimposed as spherical laminate and builds up body, and the distributed gap jet pipe for passing through veneer structure generates the high speed spray of multilayered state
It emanates stream, using good runner configuration possessed by laminate self structure, overcoming general porous material Sweat coolling structure can
The defect of hot-spot can occur, reach the reusable purpose of heating part, and at the top of nose cone using counter-flow jets into
Row cooling, strengthens the cooling effect of stagnation region.But this patent due to needs while providing the coolant of inverse spray and sweating,
Therefore two sets of coolant supply systems are needed to configure, and itself is a problems for the supply of coolant.
The supply of coolant is a critical issue of Sweat coolling, in order to preferably adapt to flying for hypersonic aircraft
Row quality and size requirement, supply system should have the characteristics of small in size, light weight.Secondly, the response speed of supply system and
Stability should meet the requirement of thermal protection system.Conventional gas supply system is generally by high pressure tank, vent valve, slow pressure
A few part compositions such as air accumulator, stabipack, solenoid valve, spout and connector, its working principle is that being stored in high pressure tank
In high pressure gas be discharged into decompression and pressure stabilizing in slow pressure air accumulator by stabipack by vent valve, given in control system
After instructing out, solenoid valve is opened, and gas is sprayed through spout.But conventional gas supply system is stored up equipped with the biggish high pressure of quality
Device of air is difficult to apply on board the aircraft, and gas is stored in high pressure tank, it is difficult to avoid the occurrence of gas leakage and ask
Topic.
Summary of the invention
The purpose of the present invention is to provide a kind of laminated board type combustion gas sweating Nose structures of solid medicine combustion gas sweating, using solid
Coolant of the body medicine combustion gas as sweating, realizes the reasonable distribution of coolant flow, avoids the waste of coolant, while solving gas
The problem that body supply system weight is big, occupied space is big.
In order to solve the above technical problems, the technical scheme adopted by the invention is that: a kind of laminated board type combustion gas sweating nose cone, packet
Laminated board type Nose structure and gas generator are included, the laminated board type Nose structure includes hollow round bottom stage, the circular base
Countertop is equipped with laminate and builds up body, and the gas generator is installed in round bottom stage, which is characterized in that the laminate builds up body
Increase the circular ring shape sweating laminate that radius is sequentially reduced with height by muti-piece to be formed by stacking, the centre bit of the muti-piece sweating laminate
In on same straight line, the center hole of the muti-piece sweating laminate stacks gradually composition coolant flow passage；Every piece of hair
Sweat lamina surface is carved with N item along the radially-arranged runner of sweating laminate, the N uniform flow passage distribution；Every M block sweating laminate
It constitutes a laminate and stacks the period, the angle being staggered between latter block of sweating laminate and the adjacent channels of previous block of sweating laminate is；
Wherein, N, M are positive integer.
One laminate stacks the period and refers to that sweating laminate block-by-block is rotated towards a direction, and corresponding runner returns to initial 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 round bottom stage and the shell and igniter of a side opening, this
Open side is equipped with outlet end cap, offers the hole being connected to coolant flow passage on outlet end cap；Be equipped in 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 from outer casing end axle center.
The gas treatment layer is made 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 of gas generating agent, binder, cooling agent and properties modifier, and gas produces
Gas agent answers comprehensive selection ignition temperature 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
Suitable reduction of speed cooling agent is added, wherein NC/NG/FZ accounting about 65%, reduction of speed cooling agent accounting about 35%.
Further, the sweating laminate is equipped with 8 runners, and the angle of adjacent channels is 45 °.
Further, every 4 blocks of sweating laminates constitute a laminate and stack the period, between the adjacent channels of adjacent sweating laminate
Angle be 11.25 °.
Further, the width of the runner is gradually increased from inside to outside.
General Mechanical microwells and porous material are when the case where hot-spot occurs in heating surface, since local skeleton is heated
Expansion, sweating working medium flow resistance here increase, and local sweating flow will be reduced, occur the expansion in hot-spot area and
Deteriorate.But using this structure due to the flaring type runner that runner is in interior narrow outer width, the resistance of flowing is concentrated mainly on interior
The narrow flow passage area in portion causes local resistance to increase when surface hot-spot, but since increased resistance is relative to stream
The overall resistance specific gravity very little in road, therefore not will lead to the variation of flow, 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
(i.e. recessed depth of the runner in sweating lamina surface) is smaller.
Further, the round sweating laminate with a thickness of 0.5 ~ 1mm, it is preferable that build up body closer to laminate
The thickness at top, sweating laminate is thinner.
Further, the top that the laminate builds up body is equipped 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 guarantee
Bigger coolant flow can be being provided by subapical high heat flux regions.
When work, igniter lights gas-forming agent, and gas-forming agent burns rapidly, and the combustion gas of generation passes through gas treatment
The processing of layer, on the one hand filters out the residue of burning, on the other hand carries out physics cooling to combustion gas, obtains the combustion gas of no residue.
Combustion gas enters the hollow structure that laminate builds up internal portion by gas generator outlet, finally by the runner inside laminate from nose
Poppet surface outflow, 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, propose one kind
Novel laminated board type combustion gas sweating nose cone, high pressure tank gas supply different from the past, but the combustion that the burning of solid medicine is generated
Gas source of the gas as sweating generates the high speed jet-stream wind of multilayered state by the distributed gap jet pipe of veneer structure, realizes
The protection of nose cone heating surface.
Compared with prior art, the invention has the following beneficial effects:
(1) using sweating veneer structure inner flow passage can flexible design the advantages of, accurately control the stream of different sweating laminates
Road configuration, so that the resistance of runner changes with the difference of sweating laminate position, so that the flow of different laminates is controlled,
Meet the cooling requirement of nose cone surface different location, ensures the strong stabilization of generating surface sweating stream.Using veneer structure both can gram
It takes porous material Sweat coolling and the defect of hot-spot occurs, and can realize the reasonable distribution of coolant flow, avoid cooling
The waste of agent.
(2) high pressure tank air supply system is replaced with solid medicine gas generator, greatly reduces the quality of air supply system；Gas
Body generator is connected directly with veneer structure, saves system the space occupied；And system response time is fast, no disclosure risk.
Detailed description of the invention
Fig. 1 is a kind of perspective view of laminated board type combustion gas sweating nose cone of the invention.
Fig. 2 is a kind of the schematic diagram of the section structure of laminated board type combustion gas sweating nose cone of the invention.
Fig. 3 is a kind of laminated board type Nose structure perspective view of the invention.
Fig. 4 is a kind of schematic diagram of sweating veneer structure of the invention.
Fig. 5 is a kind of stacked system schematic diagram of sweating laminate of the invention.
Specific embodiment
Fig. 1 to Fig. 5 shows a kind of dependency structure of laminated board type combustion gas sweating nose cone of the 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 round bottom stage 11,
Circle 11 top surface of bottom stage is equipped with laminate and builds up body 12, and the gas generator 2 is installed in round bottom stage 11, the laminate
It builds up body 12 and is staggeredly formed by stacking by muti-piece with 15 coaxial rotating of circular ring shape sweating laminate that height increase radius is sequentially reduced, institute
The center hole for stating muti-piece sweating laminate 15, which stacks gradually, constitutes coolant flow passage 17；15 surface engraving of sweating laminate
There are 8 along the radially-arranged runner 16 of sweating laminate, 8 runners 16 are uniformly distributed along the center of sweating laminate 15；Every 4 pieces
Sweating laminate 15 constitutes a laminate and stacks the period, 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 round bottom stage 11 and the shell 23 and igniter 21 of a side opening,
The open side is equipped with outlet end cap 27, offers the hole being connected to coolant flow passage 17 on outlet end cap 27；The shell
The gas treatment layer 25 parallel with sweating laminate 15 is equipped in 23, which is separated into pressure buffer chamber for shell 23
26 and combustion chamber 24, gas-forming agent is filled in combustion chamber 24, and the igniter 21 goes out to stretch to from 23 end axle center of shell
24 top of combustion chamber.Preferably, outlet end cap is integrated with cylindrical shell design, outlet end cap 27 and cylindrical shell 22
It is connected by the way of welding.Preferably, igniter 21 uses general electric igniter, is connected using bolt 22 from cylindrical shell
Top of combustion chamber igniting is inserted at the axle center of end, so that the indoor gas-forming agent that burns does level combustion along axial direction as far as possible
It burns.
The gas treatment layer 25 is made 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
It states gas-forming agent to be formulated based on double base propellant NC/NG and extender plasticizer FZ, adds suitable reduction of speed cooling
Agent, wherein NC/NG/FZ accounting 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 the reduction away from vertex distance with outer diameter.
The depth of the runner 16 is 0.4 ~ 0.5mm；The round sweating laminate 15 with a thickness of 0.5 ~ 1mm.
The top that the laminate builds up body 12 is equipped with arc-shaped main header casing 13, and the center of the main header casing 13 offers round hair
Pore 14.
Claims (9)
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) includes hollow round bottom stage (11), and circle bottom stage (11) top surface is equipped with laminate and builds up body (12), described
Gas generator (2) is installed in round bottom stage (11), which is characterized in that the laminate builds up body (12) and increased by muti-piece with height
The circular ring shape sweating laminate (15) for adding radius to be sequentially reduced is formed by stacking, and the center of the muti-piece sweating laminate (15) is located at same
On straight line, the center hole of the muti-piece sweating laminate (15), which stacks gradually, constitutes coolant flow passage (17)；Described in every piece
Sweating laminate (15) surface engraving has N item along the radially-arranged runner of sweating laminate (16), and the N runner (16) is uniformly divided
The width of cloth, the runner (16) is gradually increased from inside to outside；Every M block sweating laminate (15) constitutes a laminate and stacks the period,
The angle being staggered between latter block of sweating laminate and the adjacent channels (16) of previous block of sweating laminate be 360 °/(NM)；
Wherein, N, M are positive integer.
2. laminated board type combustion gas sweating nose cone according to claim 1, which is characterized in that the gas generator (2) includes
It is matched with round bottom stage (11) and the shell of a side opening (23) and igniter (21), the open side is equipped with outlet end cap (27),
The hole being connected to coolant flow passage (17) is offered on outlet end cap (27)；It is equipped with and sweating laminate in the shell (23)
(15) shell (23) is separated into pressure buffer chamber (26) and burning by parallel gas treatment layer (25), the gas treatment layer (25)
Room (24), is filled with gas-forming agent in combustion chamber (24), the igniter (21) stretches to from shell (23) end axle center
At the top of combustion chamber (24).
3. laminated board type combustion gas sweating nose cone according to claim 2, which is characterized in that the gas treatment layer (25) by 2 ~
3 layers of microporous filter screen composition, the aperture of the microporous filter screen are 50 ~ 300 μm.
4. laminated board type combustion gas sweating nose cone according to claim 2, which is characterized in that the gas-forming agent is pushed away with biradical
It is formulated based on into agent NC/NG and extender plasticizer FZ, adds suitable reduction of speed cooling agent, wherein NC/NG/FZ accounting is about
65%, reduction of speed cooling agent accounting about 35%.
5. laminated board type combustion gas sweating nose cone according to claim 1, which is characterized in that the sweating laminate (15) is equipped with
8 runners (16), the angle of adjacent channels (16) are 45 °.
6. laminated board type combustion gas sweating nose cone according to claim 5, which is characterized in that every 4 blocks of sweating laminates (15) are constituted
One laminate stacks the period, and the angle between the adjacent channels of adjacent sweating laminate is 11.25 °.
7. described in any item laminated board type combustion gas sweating nose cones according to claim 1 ~ 6, which is characterized in that the runner (16)
Depth is 0.4 ~ 0.5mm.
8. described in any item laminated board type combustion gas sweating nose cones according to claim 1 ~ 6, which is characterized in that the round sweating
Laminate (15) with a thickness of 0.5 ~ 1mm.
9. described in any item laminated board type combustion gas sweating nose cones according to claim 1 ~ 6, which is characterized in that the laminate builds up body
(12) top is equipped with arc-shaped main header casing (13), and the center of the main header casing (13) offers round 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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| CN107719630A CN107719630A (en) | 2018-02-23 |
| CN107719630B true CN107719630B (en) | 2019-08-16 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109812352A (en) * | 2019-03-06 | 2019-05-28 | 中南大学 | Rocket ejector and its thermal protection structure and thermal protection method |
| CN115989325A (en) * | 2020-09-08 | 2023-04-18 | 西门子股份公司 | Laval nozzle and manufacturing method thereof |
| CN112765913B (en) * | 2021-04-08 | 2021-06-29 | 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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