CN109490359A - Profound hypothermia Oscillating flow heat transfer property test platform and method - Google Patents
Profound hypothermia Oscillating flow heat transfer property test platform and method Download PDFInfo
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- CN109490359A CN109490359A CN201811599201.2A CN201811599201A CN109490359A CN 109490359 A CN109490359 A CN 109490359A CN 201811599201 A CN201811599201 A CN 201811599201A CN 109490359 A CN109490359 A CN 109490359A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
Abstract
The invention discloses a kind of profound hypothermia Oscillating flow heat transfer property test platform and methods, are related to cryogenic engineering field.The test platform includes driving unit, control temperature unit, test cell and phase modulation unit.The present invention provides through temperature sensor, pressure sensor, dynamic pressure transducers, it can be under conditions of close to actual operating mode, temperature and pressure signal in real-time measurement device under test respectively, know the basis heat exchange data of device under test under different parameters, and then design and optimization for effectively instructing device under test.
Description
Technical field
The present invention relates to cryogenic engineering field, in particular to a kind of profound hypothermia Oscillating flow heat transfer property test platform and side
Method.
Background technique
The fast development of space technology and superconductive device considerably increases demand of the people to Cryo Refrigerator.Traditional
Sterlin refrigerator, G-M refrigeration machine are answered in space infrared imaging and ground cryogenic vacuum pumping system extensively respectively
With.The research direction that hot sound refrigerating machine is endeavoured with environmental-friendly speciality as scholar by it.In recent years, in order to improve
The service life and reliability of refrigeration machine, the vascular refrigerator of cold end movement-less part also have been to be concerned by more and more people.On
It states refrigeration machine and is collectively referred to as philip refrigerator.
In philip refrigerator, what working medium carried out is all Oscillating flow, each key portion such as regenerator, heat exchanger in equipment
The performance quality of part will be brought the energy conversion efficiency of equipment and be directly affected.Especially profound hypothermia environment lower member it is compact,
It efficiently, is reliably that the target that research staff lays siege to will cause refrigeration machine cooling capacity excessive loss if component design is unreasonable.
Each component capabilities test is the basis of overall design, and promotes a critical problem of complete machine energy conversion effect.
Currently, work is the reason with reference to the single steady motion of a fluid under room temperature mostly the design process of component in Oscillating flow field
By or Correlation farmula expand gained.And Paek etc. establishes the heat transfer of hot sound refrigerating machine cold end micro heat exchanger in document [1]
Performance experiment table compares experimental result with the practical heat exchange amount being installed in refrigeration machine, highest there are 36% deviation,
The kinetic characteristics and heat-transfer character for showing Oscillating flow are substantially distinguished from unidirectional Steady Flow, utilize the reason of the unidirectional steady motion of a fluid
By or empirical results be unable under the conditions of Efficient Characterization Oscillating flow the case where.In addition, by fixed research achievement under room temperature to
The mentality of designing of profound hypothermia area extension, acquired results and actual conditions also have the device insides such as larger deviation, such as regenerator
There are the temperature fields of gradient for streamwise, are not in balanced room temperature environment；And the device under test such as cool end heat exchanger
It is practically in profound hypothermia environment, the hot physical property variation of solid and gas working medium is violent.Nsofor etc. is in document [2] to thermoacoustic
Oscillating flow heat-transfer character carries out experimental study in heat exchanger in refrigeration machine complete machine, but since refrigerating capacity limits, the device is only
Suitable for the heat exchanger under room temperature and general cold warm area.Related pins are many to the report of above-mentioned warm area Oscillating flow test research device,
However the research system under profound hypothermia is also very few.
Therefore, it is necessary to establish low-temperature test platform, above-mentioned technology barrier present in the design of philip refrigerator component is solved
Hinder, under conditions of close to actual operating mode, the heat-transfer character of Oscillating flow, acquisition are reliably set inside test device under test
Meter and interpretational criteria, to further increase the refrigeration performance of refrigeration machine.
Bibliography
[1]Paek I.,Braun J.E.,Mongeau L.,2005.Characterizing heat transfer
coefficients for heat exchangers in standing wave thermoacoustic
coolers.Journal of Acoustical Society of America,118(4):2271-2280.
[2]Nsofor E.C.,Celik S.,Wang X.D.,2007.Experimental study on the heat
transfer at the heat exchanger of the thermoacoustic refrigerating
system.Applied Thermal Engineering,27(14-15):2435-2442.
Summary of the invention
The purpose of the present invention is to provide a kind of profound hypothermia Oscillating flow heat transfer property test platforms, it can simulate backheat
The actual motion condition of device under test in formula refrigeration machine flexibly controls working media in device under test out temperature and pipeline
Flow velocity is measured by experiment, obtains the basic data of profound hypothermia area Oscillating flow heat-transfer character.
Realize the technical solution of the object of the invention:
A kind of profound hypothermia Oscillating flow heat transfer property test platform, it includes: driving unit, control temperature unit, test cell
With phase modulation unit；
The driving unit includes the pressure wave generator being sequentially connected, water cooling heat exchanger, threeway and regulating valve, for mentioning
For providing alternating pressure environment for device under test；
The control temperature unit includes vacuum (-tight) housing, level-one cold source, second level cold source, level-one regenerator, level-one cooler, second level time
Hot device, secondary coolers, heating rod and cold head temperature sensor；Electric connector and evacuation valve are set on the cover board of vacuum (-tight) housing, it is interior
Portion is equipped with cold screen, and except the driving unit and phase modulation unit are located at outside vacuum (-tight) housing, remaining feature is respectively positioned in cold screen；
Level-one regenerator one end is connected by pipeline with the regulating valve of driving unit, and it is cold that the other end is sequentially connected level-one
But device, second level regenerator and secondary coolers one end；The cooling coil of level-one cooler cryogen side ducts and cold screen with
Level-one cold source is connected；Secondary coolers are connected by conduction structure with second level cold source cool end heat exchanger；Heating rod and cold head temperature
Sensor is installed in second level cold source cool end heat exchanger surface；
The test cell includes device under test, electric heating wire, inlet temperature sensor, wall surface temperature sensor, outlet
Temperature sensor, inlet pressure transducer, outlet pressure sensor and thermal buffer tube；Described device under test one end is connected to second level
The other end of cooler；Electric heating wire is laid in device under test surface；Inlet temperature sensor and inlet pressure transducer setting
In the measurement point of device under test inlet, outlet temperature sensor and outlet pressure sensor setting device under test export
In the measurement point at place, wall surface temperature sensor is arranged in the measurement point in device under test outside wall surface；Thermal buffer tube be connected to
It surveys between the device other end and phase modulation unit pipe；
The phase modulation unit includes needle-valve, air reservoir, air reservoir dynamic pressure transducer and air reservoir temperature sensor；Needle-valve and air reservoir are logical
Piping is connected in turn after thermal buffer tube；Air reservoir dynamic pressure transducer and air reservoir temperature sensor are laid between needle-valve and air reservoir
Pipeline section in.
Preferably, the cold adherent installing cooling coil of screen, cooling coil and level-one cooler use level-one cold source to carry out
Cooling, level-one cold source is cryogenic liquid.
Preferably, second level cold source is Cryo Refrigerator.
Preferably, device under test is the internal component of philip refrigerator, including heat exchanger, regenerator, vascular.
Preferably, device under test is connected by ring flange with two lateral lines；Device under test ring flange inner surface is with recessed
Slot, the corresponding position of device under test mounting surface is with the boss with matching grooves；Metal is used between device under test and ring flange
Sealing.
Further, in each junction of gas working medium access, ring flange is threadedly coupled with two lateral lines using seal nipple,
Air reservoir dynamic pressure transducer uses thread seal, and air reservoir temperature sensor is sealed using electric connector, and remaining part is solid by welding
It is fixed.
Preferably, fixed between second level cold source installing port and equipment by flange in opening on vacuum cover plate,
It uses and is welded and fixed between remaining cover board opening and component.
Preferably, the secondary coolers use coil form, coil in the heat exchange of second level cold source cool end heat exchanger
Surface.
Preferably, three channels of the threeway are connected with water cooling heat exchanger, loading line and regulating valve respectively.
Another object of the present invention is to provide a kind of profound hypothermia alternations using test platform described in any of the above-described scheme
Flowing heat transfer performance test methods, its step are as follows:
When test, the driving unit, control temperature unit, test cell and phase modulation unit are successively connected by pipeline first
It connects, is installed in place；It is taken a breath by regulating valve, the setting of inflation/deflation and average working pressure, vacuum pump is connected into vacuum the cover
Evacuation valve on plate evacuates vacuum (-tight) housing and cold screen inner space；
After the completion of evacuation, by filling Low Temperature Liquid in the cooling coil of level-one cold source Xiang Lengping and level-one cooler inside
Body；After liquid stream is stablized, cracking pressure wave producer, water cooling heat exchanger and second level cold source adjust the output of pressure wave generator
The aperture of power, output frequency and needle-valve to adjust Oscillating flow average pressure, pressure ratio and velocity amplitude, and is set automatic
The target temperature of control loop, warm area locating for device under test Oscillating flow carry out temperature control；
When device under test reaches set temperature condition, the heating source of electric heating wire is opened, is adopted with cold head temperature sensor
The data integrated utilize automatic control loop monitoring and feedback control second level cold source cool end heat exchanger temperature as controlled device；When to
Survey the wall surface temperature of device and after out temperature reaches stability criterion, acquisition inlet temperature sensor, outlet temperature sensor,
Wall surface temperature sensor, the temperature data of air reservoir temperature sensor and inlet pressure transducer, outlet pressure sensor, air reservoir
The pressure data of dynamic pressure transducer, for passing through Oscillating flow heat exchange property inside Study on Data Processing device under test.
Oscillating flow heat-transfer character test device, passes through above-mentioned temperature sensor, pressure under profound hypothermia area provided by the invention
Force snesor, dynamic pressure transducer can distinguish temperature and pressure signal in real-time measurement device under test, know under different parameters
The basis heat exchange data of device under test, and then effectively instruct the design and optimization of device under test.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Attached drawing 1 is a kind of structure for profound hypothermia Oscillating flow heat-transfer character test device that an embodiment of the present invention provides
Schematic diagram.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, right with reference to the accompanying drawings and detailed description
The present invention is described in further detail.Specific embodiment in this specification be only be to explain the present invention, and be not intended to
Limit the present invention.
As shown in fig.1, the embodiment of the invention provides a kind of profound hypothermia Oscillating flow heat transfer flow Testing Platform,
For measuring the heat-transfer character of device under test 10.The test platform includes: driving unit, control temperature unit, test cell and phase modulation
Unit.
Driving unit includes the pressure wave generator 1 being sequentially connected, water cooling heat exchanger 2, threeway 3 and regulating valve 4.The pressure
The main body of wave generator 1 is the Linearkompressor with frequency converter, and it is adjustable to provide average pressure, alternative frequency for device under test 10
Pressure environment.The water cooling heat exchanger 2 damages heat for Linearkompressor function.Pressure wave generator 1 is connected respectively by threeway 3
Logical test pipeline and loading line carry out inflation/deflation operation using regulating valve 4.
Control temperature unit for providing and maintain 10 required temperature environment of device under test, including vacuum (-tight) housing 25, level-one cold source 23,
Second level cold source 22, level-one regenerator 26, level-one cooler 27, second level regenerator 28, secondary coolers 5, heating rod 6 and cold head temperature
Spend sensor 9.
Vacuum (-tight) housing 25 reduces leakage heat loss for maintaining test macro to run under vacuum conditions as far as possible.Vacuum (-tight) housing
25 tops have one piece of dismountable cover board, are welded with electric connector 20 and evacuation valve 21 on cover board, are respectively used to electric signal biography
It passs and vacuum pumping.Cold screen 24 is set between vacuum (-tight) housing 25 and internal components, and cold screen 24 includes cover board and cylinder, and material uses
Copper or aluminium material.When needing the lower cryogenic environment of temperature, cold screen lateral wall installs cooling coil, is passed through in cooling coil
Cryogenic liquid further cools down cold screen.Cold screen can significantly reduce radiant heat flux, be conducive to shape as auxiliary screen
The low temperature environment run at low temperature pulsating heat pipe.Filling multilayer heat-insulating material between cold 24 outer wall of screen and 25 inner wall of vacuum (-tight) housing, prevents
Heat loss.In order to be further reduced heat loss through radiation, cooling coil is welded on cold 24 upper cover plate of screen, cooling working medium uses liquid nitrogen
Equal cryogenic liquids, using external liquid nitrogen storage tank to its feed flow.Cooling coil and level-one cooler 27 can connect level-one cold source 23,
It is cooled down using level-one cold source 23.Except the anchor above the driving unit, phase modulation unit and cover board is located at very
Except 25 outsides of sky cover, remaining part is respectively positioned in cold screen 24.
Level-one cold source 23, second level cold source 22 and level Four heat exchanger, i.e. level-one regenerator 26, level-one cooler 27, second level
Regenerator 28, secondary coolers 5, for cooling down device under test 10 and internal gas working medium step by step to set temperature.Level-one cold source,
Second level cold source is respectively used to realize the cooling target of different warm areas and refrigeration requirement.Level-one cold source use cryogenic liquid, as liquid nitrogen,
Liquid hydrogen etc.；Second level cold source uses Cryo Refrigerator, such as G-M refrigeration machine or the low temperature of other forms to obtain equipment.The present embodiment
Middle selection liquid nitrogen selects the G-M refrigeration machine with temperature controller as second level cold source 22, it can be achieved that general be cooled to depth as level-one cold source 23
The cold wide cooling temperature target of warm area.In level Four heat exchanger, 4 rear of regulating valve in level-one regenerator 26 and driving unit
Export pipeline is connected, and is sequentially connected later by pipeline with level-one cooler 27, second level regenerator 28 and secondary coolers 5.Two
Grade regenerator is screen type regenerator, and the heat that Oscillating flow is brought into is carried out for storing working medium under big temperature gradient environment
Amount, substantially reduces the two-stage cooler workload of its rear end, promotes cooling effect.It is cold that two-stage cooler is separately connected two-stage
Source, according to target temperature, the refrigeration duty for adjusting the opening and closing of two-stage cold source and undertaking monitors second level cold source system using temperature sensor
Cold temperature, and by control loop, the heating power of heating rod on second level cold source is adjusted, realizes device under test different operating warm area
Accurate control.Specifically, level-one cooler 27 is storage tank form, passes through welding and the cooling coil phase on cold 24 cover board of screen
Even.G-M refrigeration machine and vacuum (-tight) housing 25 as second level cold source 22 is relatively fixed, by the heat-transfer surface and coil form of cryocooler cold head
5 close installation of secondary coolers.Conducted heat using coil exchanger, both can to avoid use the fixed structures such as bolt to cold head
Structural damage can also fast implement cooling capacity transmitting in order to avoid bringing adverse effect to refrigeration performance.In order to by device under test 10
Operation temperature area controls within the set range, and heating rod 6 and cold head temperature sensor 9 are installed in 22 cool end heat exchanger table of second level cold source
Face, the cold head temperature acquired using cold head temperature sensor 9 are adjusted heating rod 6 by pid control circuit and heat function as controlled device
Rate reaches the target of the refrigerating capacity of control G-M refrigeration machine.
Test cell includes device under test 10, electric heating wire 12, inlet temperature sensor 8, outlet temperature sensor 13, wall
Face temperature sensor 11, inlet pressure transducer 7, outlet pressure sensor 14 and thermal buffer tube 15.Device under test 10 can be
The internal component of the various philip refrigerators such as heat exchanger, regenerator, vascular.10 one end of device under test is connected to the two of coiled
After grade 5 gas side pipeline of cooler, it is while meets sealing securely and dismounting convenient and fast demand, it will be to be measured by ring flange assembly
Device 10 is connected with the entrance pipeline at both ends, and device under test has corresponding boss and groove with the contact surface of ring flange, installation
When, device under test boss is placed in ring flange groove, groove is provided with indium silk and carries out metal sealing, seals finally by VCR
Connector is connected with two side ducts.12 uniform winding of electric heating wire is evenly supplied heat compensation, certainly may be used on 10 surface of device under test
According to equipment operating condition, other different compensating forms, such as heating rod and liquid jacket may be selected, then pass through electric connector
It is connected with compensation heat source.Electric heating wire 12 is connected by electric connector 20 with external heating source.Inlet temperature sensor 8, outlet
Temperature sensor 13 is laid in respectively inside the import and export pipeline of device under test 10.To reduce measurement error, the wall surface temperature
Sensor 11 uses more, uniformly distributed in 10 outer wall of device under test axially and circumferentially as required, the number specifically used and
Distribution character and measurement demand determine laying mode depending on the temperature.Inlet pressure transducer 7, outlet pressure sensor 14
It is separately positioned on inside the import and export pipeline of device under test 10.The sensor transmits telecommunications to outside by electric connector 20
Number.Thermal buffer tube 15 be connected to test cell between room temperature environment, that is, be connected to 10 other end of device under test and phase modulation list
Between first pipeline, for transmitting Oscillating flow, and block the leakage heat from room temperature to profound hypothermia.
Phase modulation unit includes needle-valve 16, air reservoir 18, air reservoir dynamic pressure transducer 17 and air reservoir temperature sensor 19.Needle-valve 16,
Air reservoir 18 passes sequentially through after pipeline is connected to thermal buffer tube 15 in turn, for adjusting between device under test pressure current and quality stream
Phase relation, and measure Oscillating flow velocity amplitude.Needle-valve 16, air reservoir 18 are placed in except vacuum (-tight) housing 25, are convenient for experimenter's tune
Phase adjustment unit, can also can also be placed in the low temperature environment inside cold screen by section according to actual needs.Air reservoir dynamic pressure sensing
Device 17 and air reservoir temperature sensor 19 are set on the pipeline section between needle-valve 16 and air reservoir 18, and air reservoir dynamic pressure transducer 17 uses screw thread
Sealing, air reservoir temperature sensor 19 transmit electric signal, the pressure oscillation and temperature data being respectively used in measurement air reservoir 18.This hair
Each sensor, valve and other electrical equipments in bright can be uniformly connected on the automatic control equipments such as PLC, and formation automatically controls back
Road, specific type of attachment are unlimited.
Profound hypothermia Oscillating flow heat transfer property test method based on test platform of the present invention, its step are as follows:
When test, it is necessary first to the installation of device under test 10 is carried out, step is to hang out upper cover plate component, cold screen 24 is dismantled,
Device under test 10 (inserting indium silk in groove) is installed, cold screen 24 is installed, vacuum (-tight) housing 25 is packed into, each unit is passed through into pipe later
Road is sequentially connected, and forms complete system.It is taken a breath by regulating valve 4, the setting of inflation/deflation and average working pressure.Vacuum pump
The evacuation valve 21 for connecting 25 upper cover plate of vacuum (-tight) housing, evacuates vacuum (-tight) housing 25 and 24 inner space of cold screen.
After the completion of evacuation, pass through 27 inside internal-filling liquid of 24 cooling coil of Xiang Lengping in level-one cold source 23 and level-one cooler.
After liquid stream is stablized, cracking pressure wave producer 1, water cooling heat exchanger 2 and second level cold source 22.Adjust the defeated of pressure wave generator 1
The aperture of power, output frequency and needle-valve 16 out to adjust Oscillating flow average pressure, pressure ratio and velocity amplitude, and is set
The target temperature of automatic control loop carries out temperature control to warm area locating for system Oscillating flow.
When device under test 10 reaches set temperature condition, the heating source of electric heating wire 15 is opened, with cold head temperature sensing
The data that device 9 acquires are controlled device, monitor 22 cool end heat exchanger temperature of second level cold source using control loop.When device under test 10
Wall surface temperature and after heat exchanger inlet and outlet temperature reaches stability criterion, acquire inlet temperature sensor 8, outlet temperature sensor
13, wall surface temperature sensor 11, the temperature data of air reservoir temperature sensor 19 and inlet pressure transducer 7, outlet pressure sensing
The pressure data of device 14, air reservoir dynamic pressure transducer 17, and then 10 inside alternating flow of device under test is obtained by data processing and is moved
Hot property related conclusions effectively instruct it to design and optimize.
According to this specification, those skilled in the art in the invention can also carry out change appropriate to above embodiment
More and modify.Therefore, the invention is not limited to the specific embodiments of the disclosure above and description, to some modifications of the invention
It should also be as being included in scope of protection of the claims of the invention with change.In addition, although having used some spies in this specification
Fixed term, these terms are merely for convenience of description, does not limit the present invention in any way.
Claims (10)
1. a kind of profound hypothermia Oscillating flow heat transfer property test platform, it is characterised in that: include: driving unit, control temperature unit, survey
Try unit and phase modulation unit；
The driving unit includes the pressure wave generator (1) being sequentially connected, water cooling heat exchanger (2), threeway (3) and regulating valve
(4), alternating pressure environment is provided for being provided as device under test (10)；
The control temperature unit includes vacuum (-tight) housing (25), level-one cold source (23), second level cold source (22), level-one regenerator (26), level-one
Cooler (27), second level regenerator (28), secondary coolers (5), heating rod (6) and cold head temperature sensor (9)；Vacuum (-tight) housing
(25) electric connector (20) and evacuation valve (21) are set on cover board, and inside is equipped with cold screen (24), except the driving unit and adjusts
Phase element is located at vacuum (-tight) housing (25) outside, remaining feature is respectively positioned in cold screen (24)；
Described level-one regenerator (26) one end is connected by pipeline with the regulating valve (4) of driving unit, and the other end is sequentially connected one
Grade cooler (27), second level regenerator (28) and secondary coolers (5) one end；Level-one cooler (27) cryogen side ducts with
The cooling coil of cold screen (24) is connected with level-one cold source (23)；Secondary coolers (5) pass through conduction structure and second level cold source
(22) cool end heat exchanger is connected；Heating rod (6) and cold head temperature sensor (9) are installed in second level cold source (22) cool end heat exchanger table
Face；
The test cell includes device under test (10), electric heating wire (12), inlet temperature sensor (8), wall surface temperature sensing
Device (11), outlet temperature sensor (13), inlet pressure transducer (7), outlet pressure sensor (14) and thermal buffer tube (15)；
Described device under test (10) one end is connected to the other end of secondary coolers (5)；Electric heating wire (12) is laid in device under test
(10) surface；The measurement point in device under test (10) inlet is arranged in inlet temperature sensor (8) and inlet pressure transducer (7)
On, outlet temperature sensor (13) and outlet pressure sensor (14) be arranged in the measurement point in device under test (10) exit,
Wall surface temperature sensor (11) is arranged in the measurement point in device under test (10) outside wall surface；Thermal buffer tube (15) is connected to be measured
Between device (10) other end and phase modulation unit pipe；
The phase modulation unit includes needle-valve (16), air reservoir (18), air reservoir dynamic pressure transducer (17) and air reservoir temperature sensor (19)；
Needle-valve (16) and air reservoir (18) are connected in turn after thermal buffer tube (15) by pipeline；Air reservoir dynamic pressure transducer (17) and air reservoir
Temperature sensor (19) is laid in the pipeline section between needle-valve (16) and air reservoir (18).
2. profound hypothermia Oscillating flow heat transfer property test platform according to claim 1, it is characterised in that: cold screen (24) patch
Wall sets cooling coil, and cooling coil and level-one cooler (27) are cooled down using level-one cold source (23), level-one cold source
It (23) is cryogenic liquid.
3. profound hypothermia Oscillating flow heat transfer property test platform according to claim 1, it is characterised in that: second level cold source
It (22) is Cryo Refrigerator.
4. profound hypothermia Oscillating flow heat transfer property test platform according to claim 1, it is characterised in that: device under test
It (10) is the internal component of philip refrigerator, including heat exchanger, regenerator, vascular.
5. profound hypothermia Oscillating flow heat transfer property test platform according to claim 1, it is characterised in that: device under test
(10) it is connected by ring flange with two lateral lines；Device under test (10) ring flange inner surface band is fluted, device under test (10) peace
The corresponding position in dress face is with the boss with matching grooves；Metal sealing is used between device under test (10) and ring flange.
6. profound hypothermia Oscillating flow heat transfer property test platform according to claim 5, it is characterised in that: gas working medium is logical
In each junction in road, ring flange is threadedly coupled with two lateral lines using seal nipple, and air reservoir dynamic pressure transducer (17) uses screw thread
Sealing, air reservoir temperature sensor (19) are sealed using electric connector, and remaining part is by being welded and fixed.
7. profound hypothermia Oscillating flow heat transfer property test platform according to claim 1, it is characterised in that: vacuum (-tight) housing (25)
In opening on cover board, second level cold source (22) is fixed between installing port and equipment by flange, remaining cover board opening with component it
Between using being welded and fixed.
8. profound hypothermia Oscillating flow heat transfer property test platform according to claim 1, it is characterised in that: the second level
Cooler (5) uses coil form, coils in the heat exchange surface of second level cold source (22) cool end heat exchanger.
9. profound hypothermia Oscillating flow heat transfer property test platform according to claim 1, it is characterised in that: the threeway
(3) three channels are connected with water cooling heat exchanger (2), loading line and regulating valve (4) respectively.
10. a kind of profound hypothermia Oscillating flow heat transfer property test method using the test platform as described in claim 1~9,
It is characterized in that, steps are as follows:
When test, the driving unit, control temperature unit, test cell and phase modulation unit are sequentially connected first by pipeline, are pacified
It is attached to position；It is taken a breath by regulating valve (4), the setting of inflation/deflation and average working pressure, vacuum pump is connected into vacuum (-tight) housing (25)
Evacuation valve (21) on cover board evacuates vacuum (-tight) housing (25) Ji Lengping (24) inner space；
After the completion of evacuation, by being filled in the cooling coil of level-one cold source (23) Xiang Lengping (24) and level-one cooler (27) inside
Cryogenic liquid；After liquid stream is stablized, cracking pressure wave producer (1), water cooling heat exchanger (2) and second level cold source (22) adjust pressure
The aperture of the output power of wave generator (1), output frequency and needle-valve (16), to adjust Oscillating flow average pressure, pressure
Than and velocity amplitude, and set the target temperature of automatic control loop, warm area locating for device under test (10) Oscillating flow into
Row temperature control；
When device under test (10) reaches set temperature condition, the heating source of electric heating wire (15) is opened, with cold head temperature sensing
The data of device (9) acquisition are controlled device, and using automatic control loop monitoring and feedback control second level cold source (22) cold end exchanges heat
Device temperature；After the wall surface temperature and out temperature of device under test (10) reach stability criterion, inlet temperature sensor is acquired
(8), the temperature data and entrance of outlet temperature sensor (13), wall surface temperature sensor (11), air reservoir temperature sensor (19)
Pressure sensor (7), outlet pressure sensor (14), air reservoir dynamic pressure transducer (17) pressure data, for by data
The internal Oscillating flow heat exchange property of reason research device under test (10).
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| CN112834254A (en) * | 2021-01-04 | 2021-05-25 | 中国矿业大学 | Heat regenerator performance testing device and testing method |
| CN113740376A (en) * | 2020-05-28 | 2021-12-03 | 应急管理部化学品登记中心 | Quantitative sample introduction device and method for converting normal-temperature gaseous substances into low-temperature liquid |
| CN114935464A (en) * | 2022-04-25 | 2022-08-23 | 厦门大学 | Radiator experimental device for deep low temperature and cross-scale |
| GB2615555A (en) * | 2022-02-11 | 2023-08-16 | Airbus Operations Ltd | Low temperature pipe system testing |
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| CN113740376A (en) * | 2020-05-28 | 2021-12-03 | 应急管理部化学品登记中心 | Quantitative sample introduction device and method for converting normal-temperature gaseous substances into low-temperature liquid |
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| GB2615555A (en) * | 2022-02-11 | 2023-08-16 | Airbus Operations Ltd | Low temperature pipe system testing |
| EP4230983A1 (en) * | 2022-02-11 | 2023-08-23 | Airbus Operations Limited | Low temperature pipe system testing |
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