CN207703439U - A kind of high enthalpy shock tunnel of 2m magnitudes free-piston driving - Google Patents
A kind of high enthalpy shock tunnel of 2m magnitudes free-piston driving Download PDFInfo
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- CN207703439U CN207703439U CN201721864986.2U CN201721864986U CN207703439U CN 207703439 U CN207703439 U CN 207703439U CN 201721864986 U CN201721864986 U CN 201721864986U CN 207703439 U CN207703439 U CN 207703439U
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Abstract
A kind of high enthalpy shock tunnel of 2m magnitudes free-piston driving, high-pressure gas room, piston trigger mechanism, piston, compressed pipe, piston stop stop mechanism, main sandwiched film mechanism, shock tube, small sandwiched film mechanism, jet pipe, test section, track and support system.High-pressure gas room is located at the upstream of piston trigger mechanism, interior storage high pressure air.It after taskwork plug is emitted by piston trigger mechanism, will be accelerated to compressed pipe downstream direction, when piston arrives at the end of compressed pipe, most energy will be passed to helium argon mixing light gas, to generate high temperature and high pressure gas.At this point, the rupture of diaphragm of main sandwiched film mechanism, generates one of incident shock and reaches shock wave pipe end by shock tube and can reflect, the test gas to generate high temperature and pressure leads to the rupture of diaphragm of small sandwiched film mechanism.The test gas of high temperature and pressure reaches test section, obtains required free inlet flow conditions by jet pipe.
Description
Technical field
The utility model is related to a kind of high enthalpy shock tunnels of 2m magnitudes free-piston driving, can not only study superelevation sound
The pneumatic basic research such as fast high temperature real gas effect, but also scramjet engine, space reentry vehicle can be carried out
Etc. engineering Application Research.
Background technology
The physical phenomenon that hypersonic aircraft flying condition range is extensively studied with needs is unique so that single hypersonic
Testing equipment cannot be satisfied experiment demand, cause hypersonic testing equipment that diversified feature is presented.For wind tunnel test, at present
Can not be to carrying out the series of experimental research such as aerothermodynamics, Pneumatic optical, aeroacoustics in entire flight envelope, it can only be to flying
" critical path " before row experiment is assessed.In the low hypersonic region of Mach number 5-12, PERFECT GAS FLOW Mach
Number and Reynolds number (Ma-Re) simulation are practical, mainly can reduce free incoming by reducing free temperature of incoming flow reduction
The velocity of sound, to improve the Mach number of free incoming, and then realize it is hypersonic under the conditions of Ma-Re simulate.
Under Super High Speed Condition (speed is more than 3km/s), the oxygen molecule in air starts to dissociate；When speed increases again, into
Nitrogen molecular dissociation or even ionization reaction occur for one step.After flying speed is more than 4km/s, heat, chemistry, radiation, ablation process are made
At influence become important, this needs the speed of actual gas under simulated flight environment, pressure and temperature condition.Ultrahigh speed flows
The high-temperature effect brought cannot be reappeared in the hypersonic ground installation of conventional " cold " state.For simulating ultrahigh speed flowing
Two key parameters of high-temperature effect are speed of incoming flow (specific enthalpy) and double scale parameter ρ L (ρ is density, and L is characterized length), preceding
Person characterizes stagnation enthalpy, and the latter characterizes dissociation reaction scale after intense shock wave.
Utility model content
A kind of 2m magnitudes free-piston high enthalpy shock tunnel provides high enthalpy incoming for ultrahigh speed, can simulate hypervelocity flow
Two key parameters of dynamic high-temperature effect are speed of incoming flow (specific enthalpy) and double scale parameter ρ L.
The technical solution adopted in the utility model：
A kind of high enthalpy shock tunnel of 2m magnitudes free-piston driving, including：High-pressure gas room, piston trigger mechanism, work
Plug, compressed pipe, piston stop stop mechanism, main sandwiched film mechanism, shock tube, small sandwiched film mechanism, jet pipe, test section, track and support
System；
High-pressure gas indoor storage has one end of pressure-air and high-pressure gas room there are opening, and compressed pipe is from the high pressure
The opening of air storage chamber stretches into wherein, and in be built in high-pressure gas room piston trigger mechanism connection, compressed pipe it is another
End is connected by one end of main sandwiched film mechanism and shock tube, the contraction section that the other end of shock tube passes through small sandwiched film mechanism and jet pipe
Connection, test section are connected to after the expansion segment of jet pipe,
Multiple support systems are separately positioned on high-pressure gas room, piston trigger mechanism, compressed pipe, main sandwiched film mechanism, shock wave
Below pipe, jet pipe and test section, and support system installation is in orbit and is moved along track, and support system is in height and level two
Direction has fine tuning work(mechanism；
Piston is arranged in piston trigger mechanism, and after piston is launched, piston is only shut down in compression in-pipe, piston
Structure is arranged in the end of compressed pipe, for the buffer piston and deceleration emitted.
Compressed pipe is formed by multiple sectionals, and the sealing between adjacent sectional includes that three-level seals, and internal layer sealing is adopted
With metal o-ring, outer layer sealing uses O-shaped rubber ring, middle level sealing to use sealed nylon circle.
Metal o-ring uses red copper material.
The piston, which stops, is provided with gas buffer cavity configuration and silicon rubber cushion pad in stop mechanism, be used for the buffering of piston
Slow down and only stops.
Jet pipe is m magnitude jet pipes, helium, argon gas or helium the argon mixing that stuffing pressure is 5kPa~50kPa in compressed pipe
Gas.
It is provided with one or two diaphragm in main sandwiched film mechanism, a diaphragm is set in small sandwiched film mechanism.
It is vacuumized in shock tube, its pressure is made to be less than an atmospheric pressure.
The ratio between the internal diameter of compressed pipe and the internal diameter of shock tube are 2.3:1.
The pressure-bearing of high-pressure gas room is 20MPa, volume 24m3, the length 75m of compressed pipe, internal diameter 0.668m, compressed pipe
Pressure-bearing is 70MPa, and the pressure-bearing of shock tube is 100MPa, and length is 32m or 35m, internal diameter 0.29m, when Flow Field in Wind Tunnel stays room
When total temperature is more than 7000K, the length of shock tube is 32m, when the effective time of test chamber free flow is more than 40ms and is stayed
For room total temperature in 2500K~3500K, the length of shock tube is 35m；Test section volume is 230m3, vacuum degree reaches 10Pa, tries
The automatic shutter model installation skylight that section top is provided with 2.5m long is tested, multiple watch windows are provided on test section；Track exists
Height difference within the scope of 100m is less than 0.5mm.
What the utility model was brought compared with the prior art has the beneficial effect that：
(1) a kind of 2m magnitudes free-piston high enthalpy shock tunnel, test model size can be more than 2m so that model from
Right time scale and the reaction rate of nonequilibrium state are similar to free flight close.Ultrahigh speed flowing high-temperature effect can be simulated
Two key parameter speed of incoming flow (specific enthalpy) and double scale parameter ρ L.
(2) compressed pipe 4 is formed by multiple sectionals, and the sealing between adjacent sectional includes that three-level seals, sealing effect
Fruit is good, ensures the purity of helium argon gas.
(3) 4 length 75m of compressed pipe, internal diameter 0.668m, this size allow piston to tune operation, and piston is in compressed pipe
End can stop safely.
(4) two diaphragms can be set in main sandwiched film mechanism 6, can facilitate and carry out the experiment of diaphragm dynamic rupture of membranes, Neng Gouzhun
The Rupture of Membrane pressure of diaphragm is really estimated, the debugging of counterweight piston provides certain safety guarantee.
(5) 7 length 35m of shock tube, internal diameter 0.29m, this size make the wall surface that incident shock generates in the process of running
Boundary layer is less to the flow field interference of test section.
Description of the drawings
Fig. 1 is the FREE-PISTON SHOCK TUNNEL simplified schematic diagram of the utility model；
Fig. 2 a are the utility model compressed pipe connection diagrams, and Fig. 2 b are partial enlarged view；
Fig. 3 is track and compressed pipe supporting structure schematic diagram；
Fig. 4 is main sandwiched film mechanism and shock tube and compressed pipe schematic diagram；
Fig. 5 is small sandwiched film mechanism and shock tube and jet pipe schematic diagram.
Specific implementation mode
Below in conjunction with attached drawing and specific implementation, the utility model is described in more detail.
As shown in Fig. 1,4,5, the utility model proposes a kind of high enthalpy shock tunnel of 2m magnitudes free-piston driving, packets
It includes：High-pressure gas room 1, piston trigger mechanism 2, piston 3, compressed pipe 4, piston stop stop mechanism 5, main sandwiched film mechanism 6, shock tube 7,
Small sandwiched film mechanism 8, jet pipe 9, test section 10, track 11 and support system 12；
One end of pressure-air and high-pressure gas room 1 is stored in high-pressure gas room 1 there are opening, compressed pipe 4 is from described
The opening of high-pressure gas room 1 stretches into wherein, and is connected in the piston trigger mechanism 2 being built in high-pressure gas room 1, compressed pipe
4 other end is connect by main sandwiched film mechanism 6 with one end of shock tube 7, the other end of shock tube 7 by small sandwiched film mechanism 8 with
The contraction section of jet pipe 9 connects, and test section 10 is connected to after the expansion segment of jet pipe 9,
Multiple support systems 12 are separately positioned on high-pressure gas room 1, piston trigger mechanism 2, compressed pipe 4, main sandwiched film mechanism
6,10 lower section of shock tube 7, jet pipe 9 and test section, and the installation of support system 12 is moved on the rail 11 and along track, support system
12 have fine tuning work(mechanism in height and two direction of level；
Piston 3 is arranged in piston trigger mechanism 2, and after piston 3 is launched, piston 3 moves in compressed pipe 4, piston
Only stop mechanism 5 is arranged in the end of compressed pipe 4, for buffering and slowing down to the piston 3 emitted.
As shown in Fig. 2 a, 2b, compressed pipe 4 is formed by multiple sectionals, and the sealing between adjacent sectional includes three-level
Sealing, internal layer sealing use metal o-ring, outer layer sealing that O-shaped rubber ring, middle level sealing is used to use sealed nylon circle.Metal
Sealing ring uses red copper material.
The piston, which stops, is provided with gas buffer cavity configuration and silicon rubber cushion pad in stop mechanism 5, for the slow of piston 3
It eats up part of speed and only stops.
Jet pipe 9 is 2m magnitude jet pipes, and the helium, argon gas or helium argon that stuffing pressure is 5kPa~50kPa in compressed pipe 4 are mixed
Close gas.
It is provided with one or two diaphragm in main sandwiched film mechanism 6, a diaphragm is set in small sandwiched film mechanism 8.
It is vacuumized in shock tube 7, its pressure is made to be less than an atmospheric pressure.
The ratio between the internal diameter of compressed pipe 4 and the internal diameter of shock tube 7 are 2.3:1.
The pressure-bearing of high-pressure gas room 1 is 20MPa, volume 24m3, the length 75m of compressed pipe 4, internal diameter 0.668m, compressed pipe 4
Pressure-bearing be 70MPa, the pressure-bearing of shock tube 7 is 100MPa, and length is 35m or 56m, internal diameter 0.29m, when Flow Field in Wind Tunnel is stayed
When room total temperature is more than 7000K, the length of shock tube 7 is 32m, when the effective time of test chamber free flow be more than 40ms and
For total temperature in room in 2500K~3500K, the length of shock tube 7 is 56m；10 volume of test section is 230m3, vacuum degree reaches
10Pa, 10 top of test section are provided with the automatic shutter model installation skylight of 2.5m long, multiple observations are provided on test section 10
Window；Height difference of the track 11 within the scope of 100m is less than 0.5mm.
Operation principle：
The utility model proposes 2m magnitude FREE-PISTON SHOCK TUNNELs be it is a kind of with taskwork plug compressed gas obtain high temperature
The shock tunnel of high-pressure driving gas.Include mainly：High-pressure gas room 1, piston trigger mechanism 2, piston 3, compressed pipe 4, piston
Only stop mechanism 5, main sandwiched film mechanism 6, shock tube 7, small sandwiched film mechanism 8, jet pipe 9, test section 10, track 11 and support system
12。
High-pressure gas room 1, volume is big, is 24m3, high-pressure gas room inflation/deflation, energy can be fast implemented by air supply system
Enough energy is provided for piston.
Piston trigger mechanism 2 is located in high-pressure gas room 1, can open and close rapidly, when beginning, high-pressure gas room
Pressure-air can rapidly enter piston trigger mechanism, push piston operation.
The energy transmission of pressure-air is driven gas to lightweight by quality and speed, realizes that lightweight drives gas by piston 3
The high-temperature high-pressure state of body.Different jet pipes corresponds to different piston mass in room, realizes the different total temperature stagnation pressure condition of wind-tunnel.
Compressed pipe 4, overall length 75m, internal diameter Φ 0.668m, pressure resistance 70MPa.Since compressed pipe should withstand up to 70MPa's
Pressure uses three-stage combined ultrahigh-pressure self-sealing structure between each section of tube body, as shown in Figure 2 b.In this sealing structure, internal layer
The metal o-ring of special shape use red copper material, form self sealing structure after the compressive deformation of both ends, can bear be more than
The high temperature and high pressure gas of 150MPa；When the O-shaped rubber ring in outside ensure that high vacuum to external seal；The sealed nylon circle in middle level
Has the function of over current protection.
Piston stops stop mechanism 5, realizes piston soft landing and realizes tuner operation as far as possible, face is close to compress before piston at this time
Pipe end wall surface, and velocity and acceleration is zero.
Main sandwiched film mechanism 6 can be used for double film level pressure ruptures of membranes and monofilm impact rupture of membranes.Main sandwiched film mechanism places double films or list
Film meets the operation of wind-tunnel different mode.Main sandwiched film mechanism is connect by being spaced screw thread with compressed pipe and shock tube, and control is complete certainly
Interval screw thread can be locked or be opened to hydrodynamic press mechanism.When Full Automatic Liquid press mechanism make interval screw thread open after, compressed pipe 4 or
Person's shock tube 7 can be moved horizontally along rail system, after moving enough distances, according to the different operational mode of wind-tunnel, peace
Fill single-iris or double diaphragms.
Shock tube 7, overall length 35m, internal diameter Φ 290mm, pressure resistance 100MPa.Several pressure sensors are arranged on shock tube, by
Fast in shock velocity, the response frequency of pressure sensor should be higher than 50KHZ, and the frequency acquisition of collector is higher than 150KHZ.Swash
What pressure sensor can not only monitor jet pipe on wave duct stays chamber pressure, but also shock velocity can be detected, to obtain jet pipe
Total enthalpy.
The internal diameter of compressed pipe 4 and shock tube 7 has certain ratio, compression bore to be more than shock wave bore, make its satisfaction
Variable cross-section driving require, to improve jet pipe stay chamber pressure and total temperature in room.
Wind-tunnel support system 12 uses two layers of adjustable high rigidity combined track structure, as shown in Figure 3.Pass through high-precision group
It closes wedge and intense adjustment is carried out to the height of each supporting point, it is level, track and track support upper table to make track support upper surface
Height point of adjustment between face is used herein as the gasket of different-thickness and coordinates pressing plate 16, makes 100 meters of range inner surfaces of track
Difference in height is less than 0.5mm.After the completion of adjusting, track support is closely connected as one by ground bolt and ground.
Small sandwiched film mechanism 8 is threadedly coupled shock tube 7 and jet pipe 9 by interval, can by controlling Full Automatic Liquid press mechanism
Interval screw thread is opened in locking.After being spaced screw thread unlatching, shock tube is moved horizontally along rail system, when shock tube and small folder
After film mechanism meets a certain distance, diaphragm is replaced, later, starts automatic hydraulic mechanism and makes small sandwiched film mechanism and jet pipe and swash
Wave duct is locked.
Test section system 10 includes two parts of test section ontology and attack angle mechanism, test section ontology, and test section can be protected
Vibration isolation, high rigidity and the high-precision attitude variation of model of a syndrome support；Without electromagnetic interference, model installation, easy-to-connect in test section
The observation window of multi-angle, big optical observation range and instrument mounting platform；Possess automatic reset device, big top model is hung
Fill door and automatic side-door；Security requirement setting position limiting structure and position sensor are installed.
2m magnitudes jet pipe 9 is designed using characteristic line method, can improve even flow field area and quality.Jet pipe is by changing venturi
Mode change exit Mach number, exit Mach number is respectively 10 and 15.
In compressed pipe 4, the downstream of piston 3 is by compressed gas, while being also the driving gas of shock tube 7, generally
Light gas (helium, argon gas or helium argon mixture gas), pressure is very low, about 1 atmospheric pressure or less, in taskwork
The upstream of plug is high pressure reservoir 1, the interior medium high pressure gas of storage.Open piston trigger mechanism 2, release plunger 3, due to work
The huge pressure difference in 3 both sides is filled in, piston 3 will be accelerated to the direction of low-pressure gas, high pressure gas of the low-pressure gas from expansion
There obtains energy, and when 3 pressure at both sides of piston is equal, 3 accelerator of piston terminates, and 3 speed of piston is maximum at this time.Later,
Due to inertia, piston 3, which will slow down, to move ahead.When piston 3 arrives at the end of compressed pipe 4, piston 3 stops in piston and stopping at stop mechanism 5
Only.At this point, most energy will be passed to light gas, light gas will obtain very high pressure and temperature.High temperature and pressure
Gas makes first of rupture of diaphragm between compressed pipe 4 and shock tube 7, shock tube 7 be in starting state.When first
When rupture of diaphragm, one of incident shock will be generated at diaphragm, piston is still travelled forward with certain speed at this time, when shock wave reaches
7 end of shock tube and after reflecting, the rupture of diaphragm of small sandwiched film mechanism 8, jet pipe 9 will be in start-up course.
As a kind of special heating equipment, quick isentropic Compression is carried out to driving gas using piston 3, to obtain more
Height driving gas temperature, generates higher shock mach number.In order to achieve the purpose that this, driving gas must possess higher
The velocity of sound, therefore gas is driven to select light gas.
Large scale freedom piston high enthalpy shock tunnel can provide high enthalpy incoming for very high speed analog.For hypervelocity flow
Dynamic, the product ρ L of two scale parameter density and length must reappear.Experience chemical reaction, chemistry are anti-when high-enthalpy flow flows through bluff body
The characteristic time answered is determined by fluid properties.For large scale 2m magnitude free-piston high enthalpy shock tunnels, test model size
Can be very big, more than 2m so that natural time scale is similar to free flight, and the reaction rate of nonequilibrium state is close.
Embodiment：
A kind of FREE-PISTON SHOCK TUNNEL, as shown in Figure 1, including high-pressure gas room 1, piston trigger mechanism 2, piston 3, pressure
The draw 4, piston stop stop mechanism 5, main sandwiched film mechanism 6, shock tube 7, small sandwiched film mechanism 8, jet pipe 9, test section 10, track 11 and
Support system 12.
High enthalpy shock tunnel operational process is described in detail.
Before experiment, test model is installed to attack angle mechanism, according to requiring, adjusts attack angle mechanism so that model meets examination
Test requirement.
Small sandwiched film mechanism 8 is opened, the diaphragm for being suitble to operating status is installed, after installing, closes small sandwiched film mechanism 8.
Main sandwiched film mechanism 6 is opened, the diaphragm of a suitable operating status is installed, after installing, closes main sandwiched film mechanism
6。
Shock tube vacuum pump group is opened, is vacuumized to shock tube 7, when pressure reaches 6kPa, closes shock tube vacuum pump
Group.
Taskwork plug is mounted on piston trigger mechanism 2, piston trigger mechanism 2 is then shut off.Piston is stopped stop mechanism 5 to pacify
Mounted in the end of compressed pipe 4.
Main air supply system is opened, the pure dry air of high pressure is filled with to high-pressure gas room 1, is installed on high-pressure gas room 1
The pressure of pressure monitor sensor high-pressure gas room 1 close solenoid valve and pneumatic operated valve when pressure satisfaction reaches 1.08MPa,
Stop gas supply.
Compressed pipe vacuum pump group is opened, compressed pipe 4 is vacuumized, when 4 vacuum degree of compressed pipe is less than 100Pa, closes pressure
Draw vacuum pump group.Then, the mixed gas that helium/argon gas gas supply group is filled with helium and argon gas to compressed pipe 4 is opened, helium is worked as
Meet 0.7 with the quality of argon gas：0.3, when the pressure of compressed pipe is 11kPa, helium/argon gas gas supply group is closed, stops gas supply.
Piston trigger mechanism 2 is opened, the pushed at high pressure taskwork plug of high-pressure gas room 1 is run in compressed pipe 4, compressed helium
With argon gas mixed gas, and the end of compressed pipe 4 generate high temperature and pressure gas, when pressure be 7.8MPa when, main folder film machine
The rupture of diaphragm of structure 6 generates strong incident shock, and the strong incident shock of generation enters shock tube 7, heats the experiment gas of shock tube
Body can be reflected when incident shock reaches small sandwiched film mechanism 8, and reflected shock wave can heat test gas and pressurize, and generate needed for experiment
The high temperature and high pressure gas wanted.At this point, the rupture of diaphragm of small sandwiched film mechanism 8, stagnation pressure 7.6MPa, the test gas stream of high temperature and pressure
Jet pipe 9 is crossed, into test section 10, air-flow flows through model, and the sensor and its mating acquisition system on model can record air-flow
To the effect that model generates, such as aerodynamic force, Aerodynamic Heating, experiment is completed.
It this time tests, jet pipe stagnation pressure in room is 7.6MPa, total temperature 7000K.
The above is only the preferred embodiment of the present invention, is not used for limiting the scope of protection of the utility model.
For those skilled in the art, without creative efforts, the utility model can be made several
Modification and replacement, all such modifications and replacement should be covered within the scope of the utility model.
Claims (10)
1. a kind of high enthalpy shock tunnel of 2m magnitudes free-piston driving, it is characterised in that including：High-pressure gas room (1), piston
Trigger mechanism (2), piston (3), compressed pipe (4), piston stop stop mechanism (5), main sandwiched film mechanism (6), shock tube (7), small folder film
Mechanism (8), jet pipe (9), test section (10), track (11) and support system (12)；
One end of pressure-air and high-pressure gas room (1) is stored in high-pressure gas room (1) there are opening, compressed pipe (4) is from institute
The opening for stating high-pressure gas room (1) stretches into wherein, and even in the piston trigger mechanism (2) being built in high-pressure gas room (1)
It connects, the other end of compressed pipe (4) is connect by main sandwiched film mechanism (6) with one end of shock tube (7), the other end of shock tube (7)
It being connect with the contraction section of jet pipe (9) by small sandwiched film mechanism (8), test section (10) is connected to after the expansion segment of jet pipe (9),
Multiple support systems (12) are separately positioned on high-pressure gas room (1), piston trigger mechanism (2), compressed pipe (4), main folder film
Below mechanism (6), shock tube (7), jet pipe (9) and test section (10), and support system (12) is mounted on track (11) and edge
Track moves, and support system (12) has fine tuning work(mechanism in height and two direction of level；
Piston (3) is arranged in piston trigger mechanism (2), and after piston (3) is launched, piston (3) moves in compressed pipe (4)
Dynamic, piston stops stop mechanism (5) setting in the end of compressed pipe (4), for buffering and slowing down to the piston (3) emitted.
2. a kind of high enthalpy shock tunnel of 2m magnitudes free-piston driving according to claim 1, it is characterised in that：Compression
Pipe (4) is formed by multiple sectionals, and the sealing between adjacent sectional includes that three-level seals, and internal layer sealing uses metal sealing
Circle, outer layer sealing use O-shaped rubber ring, middle level sealing to use sealed nylon circle.
3. a kind of high enthalpy shock tunnel of 2m magnitudes free-piston driving according to claim 2, it is characterised in that：Metal
Sealing ring uses red copper material.
4. a kind of high enthalpy shock tunnel of 2m magnitudes free-piston driving according to claim 1, it is characterised in that：It is described
Piston, which stops, is provided with gas buffer cavity configuration and silicon rubber cushion pad in stop mechanism (5), for piston (3) buffer deceleration and
Only stop.
5. a kind of high enthalpy shock tunnel of 2m magnitudes free-piston driving according to claim 1, it is characterised in that：Jet pipe
(9) it is 2m magnitude jet pipes, the helium, argon gas or helium that compressed pipe (4) interior stuffing pressure is 5kPa~50kPa are argon-mixed.
6. a kind of high enthalpy shock tunnel of 2m magnitudes free-piston driving according to claim 1, it is characterised in that：Main folder
It is provided with one or two diaphragm in film mechanism (6), a diaphragm is set in small sandwiched film mechanism (8).
7. a kind of high enthalpy shock tunnel of 2m magnitudes free-piston driving according to claim 1, it is characterised in that：Shock wave
It is vacuumized in pipe (7), its pressure is made to be less than an atmospheric pressure.
8. a kind of high enthalpy shock tunnel of 2m magnitudes free-piston driving according to claim 1, it is characterised in that：Compression
It is 2.3 to manage the ratio between the internal diameter of (4) and the internal diameter of shock tube (7):1.
9. a kind of high enthalpy shock tunnel of 2m magnitudes free-piston driving according to claim 1, it is characterised in that：High pressure
The pressure-bearing of air storage chamber (1) is 20MPa, volume 24m3, the length 75m of compressed pipe (4), internal diameter 0.668m, the pressure-bearing of compressed pipe (4)
Pressure-bearing for 70MPa, shock tube (7) is 100MPa, and length is 32m or 35m, internal diameter 0.29m, when Flow Field in Wind Tunnel is total in room
When temperature is more than 7000K, the length of shock tube (7) is 32m, when the effective time of test chamber free flow is more than 40ms and is stayed
For room total temperature in 2500K~3500K, the length of shock tube (7) is 35m.
10. a kind of high enthalpy shock tunnel of 2m magnitudes free-piston driving according to claim 1, it is characterised in that：Examination
It is 230m to test section (10) volume3, vacuum degree reaches 10Pa, and test section (10) top is provided with the automatic shutter model peace of 2.5m long
Skylight is filled, test section is provided with multiple watch windows on (10)；Height difference of the track (11) within the scope of 100m is less than 0.5mm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976295A (en) * | 2017-12-27 | 2018-05-01 | 中国航天空气动力技术研究院 | A kind of high enthalpy shock tunnel of 2m magnitudes free-piston driving |
| CN109668712A (en) * | 2018-12-29 | 2019-04-23 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of model emitter and its application |
| CN111514820A (en) * | 2020-04-28 | 2020-08-11 | 北华航天工业学院 | Heavy type quick press |
| CN114486155A (en) * | 2021-12-27 | 2022-05-13 | 中国航天空气动力技术研究院 | High-enthalpy shock tunnel parameter diagnosis method and system |
-
2017
- 2017-12-27 CN CN201721864986.2U patent/CN207703439U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976295A (en) * | 2017-12-27 | 2018-05-01 | 中国航天空气动力技术研究院 | A kind of high enthalpy shock tunnel of 2m magnitudes free-piston driving |
| CN107976295B (en) * | 2017-12-27 | 2020-04-10 | 中国航天空气动力技术研究院 | 2 m-magnitude free piston driven high-enthalpy shock wave wind tunnel |
| CN109668712A (en) * | 2018-12-29 | 2019-04-23 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of model emitter and its application |
| CN111514820A (en) * | 2020-04-28 | 2020-08-11 | 北华航天工业学院 | Heavy type quick press |
| CN114486155A (en) * | 2021-12-27 | 2022-05-13 | 中国航天空气动力技术研究院 | High-enthalpy shock tunnel parameter diagnosis method and system |
| CN114486155B (en) * | 2021-12-27 | 2022-10-14 | 中国航天空气动力技术研究院 | High-enthalpy shock tunnel parameter diagnosis method and system |
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