CN109932298A - Micro-flows visual testing device and method under a kind of coupling - Google Patents
Micro-flows visual testing device and method under a kind of coupling Download PDFInfo
- Publication number
- CN109932298A CN109932298A CN201910173766.2A CN201910173766A CN109932298A CN 109932298 A CN109932298 A CN 109932298A CN 201910173766 A CN201910173766 A CN 201910173766A CN 109932298 A CN109932298 A CN 109932298A
- Authority
- CN
- China
- Prior art keywords
- test specimen
- micro
- chip test
- pmma
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 88
- 238000010168 coupling process Methods 0.000 title claims abstract description 25
- 230000008878 coupling Effects 0.000 title claims abstract description 23
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 23
- 230000000007 visual effect Effects 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 53
- 239000012530 fluid Substances 0.000 claims abstract description 29
- 230000008859 change Effects 0.000 claims abstract description 16
- 238000010992 reflux Methods 0.000 claims abstract description 7
- 230000033228 biological regulation Effects 0.000 claims abstract description 6
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 57
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 57
- 239000003245 coal Substances 0.000 claims description 30
- 239000011521 glass Substances 0.000 claims description 29
- 238000012545 processing Methods 0.000 claims description 21
- 238000002474 experimental method Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 238000004458 analytical method Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000012512 characterization method Methods 0.000 claims description 4
- 238000002242 deionisation method Methods 0.000 claims description 4
- 238000004043 dyeing Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 12
- 230000009123 feedback regulation Effects 0.000 abstract description 7
- 230000035699 permeability Effects 0.000 abstract description 6
- 230000003321 amplification Effects 0.000 abstract description 2
- 230000008676 import Effects 0.000 abstract description 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 abstract description 2
- 230000005514 two-phase flow Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000003993 interaction Effects 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000002775 capsule Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002032 lab-on-a-chip Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010603 microCT Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 description 1
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention discloses Micro-flows visual testing device under a kind of coupling comprising external system and chip holders system.High-precision hydraulic pump is injected into the channel that chip has been portrayed by the flow velocity that flowmeter needs liquid, and the flow sensor moment monitors the pressure in fluid flow and feedback regulation pump.Obtain chip channel in static contact angle when, reflux valve ensure fluid will not occur reflux and breaking test data, in conjunction with import and export pressure count value difference can computing chip channel permeability.Chip holders, chip are placed on microscopical objective table, and three-dimensional microscope will observe object amplification, and high-speed camera captures fluid flowing overall process and constantly by data, image transmitting into data acquisition device.The present invention can observe influence of some factor for two micro flows by the variation of regulation single one physical field, can also change simultaneously the condition of multiple physical fields, guarantee that high-speed camera can accurately capture entire flow process.
Description
Technical field
The present invention relates to the microscopic heat conduction research fields during oil and gas development, more particularly to a kind of multiple physical field coupling
Cooperation lower Micro-flows visual testing device and method.
Background technique
Coal bed gas is preservation in coal seam and the high-quality clean energy resource of coal measure strata, China's coal bed gas resource rich reserves but infiltration
Permeability is extremely low.Matrix of coal plays decision to coal bed gas gas producing efficiency as gas major storage place, flow characteristics and ability
Property effect.Fluid migration efficiency and relative permeability variation are mainly mutual by coal in matrix-solution-air three phase boundary in matrix of coal
Effect and the control of water-blocking effect.And 1. existing research work focuses mostly on greatly and inquires into the interior gas absorption/solution of hole (micro-scale)
It inhales diffusion to couple with (macro-scale) seepage flow in crack, seldom considers fluid coal-solution-air three-phase interaction in coal petrography matrix
Feature.2. the solid-liquid wetting Journal of Sex Research based on coal seam flow of air mostly observes contact angle under normal pressure, this test method, which is ignored, to be assigned
Depositing pressure in geological environment, temperature, fluid ions concentration and coal rock component variation influences wettability.3. under micro-scale
Water-gas two phase flow flow characteristics is still based on numerical simulation, practical stream of the two phase flow in coal petrography minute yardstick at present in coal medium
Emotionally condition is still verified without direct experimental data at present.For the feature of coal petrography pore structure, different scale is considered
The interaction of lower liquid-gas two-phase fluid plays analysis coal bed gas flow characteristics and Accurate Prediction gas production vital
Effect.However belong to advanced subject at present there is no relevant experimental provision in multiple physical field microscopic fields.
Summary of the invention
Based on above-mentioned technical problem, the present invention provides Micro-flows visual testing device and side under a kind of coupling
Method.
The adopted technical solution is that:
Micro-flows visual testing device under a kind of coupling, including sliding cover type glass box, in sliding cover type glass
Case is internally provided with PMMA chip test specimen, and the inside of the PMMA chip test specimen is formed with crack passage；
One end of PMMA chip test specimen is provided with ingate, ingate is connected by liquid input tube road and the first hydraulic pump
It connects, is provided with first flowmeter and reflux valve on liquid input tube road, be also connected with flow sensing on liquid input tube road
Device, flow sensor are connect with the first hydraulic pump；The other end of PMMA chip test specimen is provided with outlet opening, outlet opening and liquid
Output channel connection, is provided with second flowmeter on liquid output pipe road；
The first pressurizing device for pressurization, first pressurizing device are provided at two short sides of PMMA chip test specimen
Including hydraulic cavities, connect at the hydraulic piston that is internally provided with of hydraulic cavities, one end of hydraulic cavities and the short side of PMMA chip test specimen
It connects, the other end of hydraulic cavities is connect by hydraulic pipeline with the second hydraulic pump；
Two long edge positions of PMMA chip test specimen are provided with the second pressurizing device for pressurization, second pressurizing device
Including head tank, it is internally provided with air bag and rubber stopper in head tank, the rubber stopper is located at air bag and PMMA chip test specimen
Between, the air bag is connect by gas pipeline with air pump；
The side of sliding cover type glass box is provided with three-dimensional microscope, three-dimensional microscope passes through patchcord and high-speed camera
Connection, high-speed camera are connect with data processing equipment.
Preferably, in the inside of sliding cover type glass box heating wire, cooling fin are additionally provided with and for detecting sliding cover type glass
The temperature sensor of glass case internal temperature.
Preferably, the hydraulic cavities include the first chamber and second chamber being connected, and the area of section of first chamber is small
In the area of section of second chamber, second chamber is located between first chamber and PMMA chip test specimen, the hydraulic piston installation
In first chamber, the end point of first chamber is provided with sealing-plug.
Preferably, the junction of hydraulic cavities and PMMA chip test specimen is provided with semicircle base for post, semicircle base for post is put down
Face part is contacted with PMMA chip test specimen, and the planar section of semicircle base for post is set as soft formation.
Preferably, the long edge position of PMMA chip test specimen is provided with first pressure sensing chip, first pressure sensing chip and
The connection of one pressure sensor, first pressure sensor are connect with air pump；It is set at the position of hydraulic cavities connection PMMA chip test specimen
It is equipped with second pressure sensing chip, second pressure sensing chip is connect with second pressure sensor, second pressure sensor and the second liquid
Press pump connection.
A kind of Micro-flows visual testing method under coupling, using device as described above, specifically include with
Lower step:
(1) prefabricated PMMA chip test specimen is put into sliding cover type glass box, is fixed by fixture, and inputted with liquid
Pipeline, liquid output pipe road, the first pressurizing device and the second pressurizing device connect；Adjust three-dimensional microscope, and by three
Dimension microscope, high-speed camera and data processing equipment are sequentially connected；
(2) it is adjusted inside sliding cover type glass box in real time by heating wire, cooling fin and temperature sensor to suitable test
Temperature；
(3) applied by the second hydraulic pump, hydraulic pipeline, hydraulic piston and hydraulic cavities to two short sides of PMMA chip test specimen
Fluid pressure applies gas pressure to two long sides of PMMA chip test specimen by air pump, gas pipeline, air bag and rubber stopper；Gas
Body pressure and fluid pressure pass through first pressure sensing chip, first pressure sensor and air pump and second pressure induction respectively
Piece, second pressure sensor and the second hydraulic pump are adjusted；
(4) it is injected by the first hydraulic pump, liquid input tube road and ingate into the crack passage of PMMA chip test specimen
Liquid, the liquid in the crack passage of PMMA chip test specimen are discharged by outlet opening and liquid output pipe road, pass through first respectively
Flowmeter and second flowmeter carry out the fluid flow in the fluid flow and liquid output pipe road in liquid input tube road
Measurement；
(5) micro flow data are acquired by three-dimensional microscope and high-speed camera, and transfers data to data processing
Device carries out processing analysis using data processing equipment.
Preferably, answering for simulation flow channel is used in combination by the first pressurizing device and the second pressurizing device in the above method
The change in the field of force；By the chip of replacement characterization different moments coal petrography crack shape, characteristic, its flow-data is observed, by more
Group experiment linking is to simulate macrospecimen dynamic change.
Preferably, the above method observes some factor for the shadow of micro flow by the variation of regulation single one physical field
It rings；Or the condition of multiple physical fields is changed simultaneously, to observe influence of the Multiple factors change for micro flow.
Preferably, in the experiment of water drive gas, injection liquid is handled by deionization and dyeing, in order to observe the two
Preceding forward line, contact angle, flowing velocity and bubble deformation.
Advantageous effects of the invention are as follows:
1, placement, clamping of the sliding cover type glass box convenient for chip, the characteristic of light transmission can guarantee will not be visual to other
The operation for changing equipment has an impact, and seal feature assists to maintain the stabilization in temperature field.Temperature sensor detects in seal box
Temperature adjusts heating wire, cooling fin to control temperature field.
2, the fluid velocity in flow sensor constantly detection chip inlet pipeline, feedback regulation high-precision hydraulic pump are utilized
With high precision flow (μm/min grades), strict control injects the flow of fluid, to control its seepage field.Fluid injection speed maintains
Near 1 μm/min, guarantee that high-speed camera can accurately capture entire flow process.
3, the feedback regulation of hydraulic pump and pressure sensor can pass through hydraulic piston by the uninterrupted fluid injection of hydraulic cavities
Same axial pressure is applied to chip short side, hydraulic cavities leading portion diameter (piston diameter) is less than back segment diameter, convenient for accurate control
Intracavitary pressure.
4, short side stress piston and chip contact position use semicolumn base contact face, stress can rotate by a small margin, with
The planar section quality of chip contact is softer, can discontinuity caused by automatic compensating short side plane out-of-flatness.
5, rubber piston is packed into the balloon contacts in head tank and with inside, using air pump and looped system to gas
Capsule gas injection, air bag expansion lead to rubber stopper stress extrusion die piece long side.Has pressure sensor piece in hydraulic cavities and chip side wall.
The change of the stress field of analog flow channel is used in combination in two sets of stressing devices.
6, the present invention can observe influence of some factor for two micro flows by the variation of regulation single one physical field,
The condition of multiple physical fields, apparatus of the present invention at most stackable three physical fields can also be changed simultaneously.
Detailed description of the invention
The invention will be further described with specific embodiment with reference to the accompanying drawing:
Fig. 1 is the structural schematic diagram of sliding cover type glass box part of the present invention；
Fig. 2 is overall structure diagram of the invention.
In figure: 1-PMMA chip test specimen；The ingate 2-；3- outlet opening；4- crack passage；5- sealing-plug；6- hydraulic piston；
7- hydraulic cavities；8- first pressure sensing chip；9- head tank；10- air bag；11- rubber stopper；12- sealing-plug；13- first pressure passes
Sensor；14- air pump；15- second pressure sensing chip；16- second pressure sensor；The second hydraulic pump of 17-；18- temperature sensor；
19- heating wire；20- cooling fin；21- sealing-plug；22- chip fixture；23- sliding cover type glass box；The first hydraulic pump of 24-； 25-
First flowmeter；26- flow sensor；27- reflux valve；28- data processing equipment；29- three-dimensional microscope；30-F turns C switching
Bayonet；31- high-speed camera；32- second flowmeter；33- semicircle base for post.
Specific embodiment
To solve structure evolution, the seepage flow, stress phase that microstructure, crustal stress and the exploitation of above-mentioned coal and rock complexity cause
The physical mechanics process or mechanism of interaction etc. " invisible " change the "black box" experimental method that previous macroscopic view solves the problems, such as, this
Invention proposes Micro-flows visual testing device and method under a kind of coupling.Based on newest lab-on-a-chip technology
Two-phase flow regime changes in the mutual displacement process of solution-air under visual research minute yardstick, and system device is adjusted in design multiple physical field
And experimental method, microstructure, flowing change procedure under temperature field, seepage field and stress field coupling can be tested, it is full
The acquisition function of more physical parameters during the multiple dimensioned microcosmic two-phase flow of foot.It can to understand that coal petrography Micro-flows feature provides
The experimental data leaned on simultaneously establishes coal-solution-air interaction phenomenological relation.The device will be prediction and macrospecimen is instructed to test
And coal bed gas well draining-gas producing technology provides theoretical and model foundation under field scale different condition.
In conjunction with attached drawing, Micro-flows visual testing device under a kind of coupling, including sliding cover type glass box 23,
Sliding cover type glass box is internally provided with PMMA chip test specimen 1, and the inside of the PMMA chip test specimen 1 is formed with crack passage 4.
One end of PMMA chip test specimen 1 is provided with ingate 2, ingate is connect by liquid input tube road with the first hydraulic pump 24,
It is provided with first flowmeter 25 and reflux valve 27 on liquid input tube road, is also connected with flow sensing on liquid input tube road
Device 26, flow sensor are connect with the first hydraulic pump 24.The other end of PMMA chip test specimen is provided with outlet opening 3, outlet opening
3 connect with liquid output pipe road, and second flowmeter 32 is provided on liquid output pipe road.
The first pressurizing device for pressurization, first pressurizing device are provided at two short sides of PMMA chip test specimen
Including hydraulic cavities 7, hydraulic piston 6 is internally provided in hydraulic cavities, at one end of hydraulic cavities and the short side of PMMA chip test specimen
The other end of connection, hydraulic cavities is connect by hydraulic pipeline with the second hydraulic pump 17.It is set in two long edge positions of PMMA chip test specimen
It is equipped with the second pressurizing device for pressurization, second pressurizing device includes head tank 9, is internally provided with gas in head tank
Capsule 10 and rubber stopper 11, the rubber stopper are located between air bag and PMMA chip test specimen, the air bag 10 by gas pipeline with
Air pump 14 connects.
The side of sliding cover type glass box 23 is provided with three-dimensional microscope 29, three-dimensional microscope 29 turns C switching bayonet by F
30 connect with high-speed camera 31, and high-speed camera 31 is connect with data processing equipment 28.
Above-mentioned sliding cover type glass box 23 is made of transparent glass material, including cabinet and slide cover board.
As to further design of the invention, heating wire 19, cooling fin are additionally provided in the inside of sliding cover type glass box
20 and the temperature sensor 18 for detecting sliding cover type glass box internal temperature.
Further, the hydraulic cavities 7 include the first chamber and second chamber being connected, the section face of first chamber
Product is less than the area of section of second chamber, and second chamber is located between first chamber and PMMA chip test specimen, the hydraulic piston 6
It is installed in first chamber, the end point of first chamber is provided with sealing-plug 5.
Further, the junction of hydraulic cavities and PMMA chip test specimen is provided with semicircle base for post 33, semicircle base for post
33 planar section is contacted with PMMA chip test specimen, and the planar section of semicircle base for post is set as soft formation.
Further, the long edge position of PMMA chip test specimen is provided with first pressure sensing chip 8, first pressure sensing chip
8 connect with first pressure sensor 13, and first pressure sensor 13 is connect with air pump 14.PMMA chip test specimen is connected in hydraulic cavities
Position at be provided with second pressure sensing chip 15, second pressure sensing chip 15 is connect with second pressure sensor 16, second pressure
Force snesor 16 is connect with the second hydraulic pump 17.
A kind of Micro-flows visual testing method under coupling, using device as described above, specifically include with
Lower step:
(1) prefabricated PMMA chip test specimen is put into sliding cover type glass box, is fixed by fixture, and inputted with liquid
Pipeline, liquid output pipe road, the first pressurizing device and the second pressurizing device connect；Adjust three-dimensional microscope, and by three
Dimension microscope, high-speed camera and data processing equipment are sequentially connected；
(2) it is adjusted inside sliding cover type glass box in real time by heating wire, cooling fin and temperature sensor to suitable test
Temperature；
(3) applied by the second hydraulic pump, hydraulic pipeline, hydraulic piston and hydraulic cavities to two short sides of PMMA chip test specimen
Fluid pressure applies gas pressure to two long sides of PMMA chip test specimen by air pump, gas pipeline, air bag and rubber stopper；Gas
Body pressure and fluid pressure pass through first pressure sensing chip, first pressure sensor and air pump and second pressure induction respectively
Piece, second pressure sensor and the second hydraulic pump are adjusted；
(4) it is injected by the first hydraulic pump, liquid input tube road and ingate into the crack passage of PMMA chip test specimen
Liquid, the liquid in the crack passage of PMMA chip test specimen are discharged by outlet opening and liquid output pipe road, pass through first respectively
Flowmeter and second flowmeter carry out the fluid flow in the fluid flow and liquid output pipe road in liquid input tube road
Measurement；
(5) micro flow data are acquired by three-dimensional microscope and high-speed camera, and transfers data to data processing
Device carries out processing analysis using data processing equipment.
In the above method, the stress field of simulation flow channel is used in combination by the first pressurizing device and the second pressurizing device
Change；By the chip of replacement characterization different moments coal petrography crack shape, characteristic, its flow-data is observed, passes through multiple groups reality
Linking is tested to simulate macrospecimen dynamic change.
In the above method, influence of some factor for micro flow is observed by the variation of regulation single one physical field；Or
The condition of multiple physical fields is changed simultaneously, to observe influence of the Multiple factors change for micro flow.
In the above method, in the experiment of water drive gas, injection liquid is handled by deionization and dyeing, in order to observe
The preceding forward line, contact angle, flowing velocity and bubble deformation of the two.
Micro-flows visual testing device can visualize under multiple physical field coupling under coupling of the present invention
Vapor-liquid two phases flow process in minute yardstick crack, analyze gas-liquid fluidised form Characteristics of Evolution and mechanism, approximately as:
1,31 system acquisition micro flow data of three-dimensional microscope 29 and high-speed camera are utilized.Utilize data processing equipment
ImageJ software and Phantom processing analysis gained physical parameter in 28.
2, coal petrography microchannel is portrayed using PMMA material chip, the material chip stress is convenient for control.Coal petrography is micro-
It sees channel to obtain using the scanning of high-resolution Micro-CT technology, and channel wettability is handled, keep it closer former
Beginning coal sample wettability.
3, placement, clamping of the sliding cover type glass box 23 convenient for chip, the characteristic of light transmission can guarantee will not can to other
Operation depending on changing equipment has an impact, and seal feature assists to maintain the stabilization in temperature field.Temperature sensor 18 detects seal box
Interior temperature adjusts heating wire 19, cooling fin 20 to control temperature field.
4, the fluid velocity in flow sensor 26 constantly detection chip inlet pipeline, the first hydraulic pump of feedback regulation are utilized
24 and first flowmeter (μm/min grades) 25, strict control injects the flow of fluid, to control its seepage field.Fluid injection speed maintains
Near 1 μm/min, guarantee that high-speed camera can accurately capture entire flow process.
5, the feedback regulation of the second hydraulic pump 17 and second pressure sensor 16 can by the uninterrupted fluid injection of hydraulic cavities,
Same axial pressure is applied to chip short side by hydraulic piston, hydraulic cavities leading portion diameter (piston diameter) is less than back segment diameter,
Convenient for the pressure in accurate control chamber.
6, short side stress piston and chip contact position use 33 contact surface of semicircle base for post, stress can rotate by a small margin,
The planar section quality contacted with chip is softer, can discontinuity caused by automatic compensating short side plane out-of-flatness.
7, rubber piston 11 is packed into head tank 9 and is contacted with internal air bag 10, utilize air pump and feedback regulation system
System leads to rubber stopper stress extrusion die piece long side to 10 gas injection of air bag, air bag expansion.With pressure in hydraulic cavities and chip side wall
Power sensing chip.The change of the stress field of analog flow channel is used in combination in two sets of stressing devices.
8, influence of some factor for two micro flows can be observed by the variation of regulation single one physical field, it can also be same
When change the conditions of multiple physical fields, apparatus of the present invention at most stackable three physical fields.
9, in the experiment of water drive gas, liquid is convenient for the preceding forward line of both observation, contact by deionization and dyeing processing
Angle, flowing velocity and bubble deformation etc..
10, by the chip of replacement characterization different moments coal petrography crack shape, characteristic, its flow-data is observed, by more
Group experiment linking is to simulate macrospecimen dynamic change.
To sum up, the present invention provides Micro-flows visual testing device and method under a kind of coupling comprising outer
Portion's system and chip holders system.High-precision hydraulic pump is injected into chip by the flow velocity that flowmeter needs liquid and portrays
In good channel, the flow sensor moment monitors the pressure in fluid flow and feedback regulation pump.It is quiet in chip channel obtaining
When state contact angle, reflux valve ensures that fluid will not occur to flow back and breaking test data, can in conjunction with import and export pressure count value difference
The permeability in computing chip channel.Chip holders, chip are placed on microscopical objective table, and three-dimensional microscope will observation pair
As amplification, high-speed camera captures fluid flowing overall process and constantly by data, image transmitting into data acquisition device.Chip
Using traditional rectangular parallelepiped structure, PMMA material, the direction for being easy to different to channel applies different stress fields.Long side contact surface
Product is big, is easy to apply stress to long side using devices such as head tank, air bag, rubber stoppers and error is small.Short side forced area is small, is
The appearance of stress concentration phenomenon is prevented, is pressurizeed using hydraulic control system to short side, a pair of of the semicircle base for post in contact position
Further alleviate stress to concentrate.Slip lid glass box is convenient for the pick-and-place of chip, maintains the constant of temperature field, and enter convenient for light
And Image Acquisition, case stature matter are that PDMS material is conducive to keep the temperature.The stress of pressure sensor piece and pressure sensor memorization COMS clip
Deformation.Heating wire and temperature sensor maintain the temperature field of chip to remain unchanged.Using the poster processing soft ImageJ and
Phantom analyzes static, dynamic image pro cess.All junctions are sealed processing using sealing ring, stringent to ensure
The stabilization of each physical field.
Key innovations of the invention are substantially embodied in the following aspects:
1) theory innovation: existing experimental provision is not available for stress deformation condition for the dynamic of two-phase flow in crack
It influences, the present apparatus can control the constant condition such as temperature, air pressure, and quantization stress first seeps two-phase at single crack
Then the influence of stream integrates the influence of each factor by the method for control variable and weight, to obtain based on test result
New micro flow theoretical constitutive model.Apparatus of the present invention visualized experiment process, accurate data collection and analysis are different from
Traditional "black box" operating operation test system.
2) method innovation: it there is no experimental provision that can describe minute yardstick vapor-liquid two phases in coal petrography matrix at present and flow more objects
Manage field coupling process.The test of coal relative permeability is often based upon laboratory standard sample and is tested, by test coal sample
The variation of total water content carrys out inverting permeability saturation curve, only describes air-liquid flow process in coal from macro-scale.
3) equipment is innovated: the present invention designs the systems such as closed temperature-adjustable field, stress field, seepage field, considers test specimen
Restricting relation between the factors such as wettability, surface tension, surface roughness.Meanwhile 1. the present invention passes through custom chip and simulates coal
The intrinsic hydrophobic character of rock overcomes wettability test result under condition of normal pressure and is easy to be influenced by evaporation process, not know
The larger disadvantage of property；2. changing chip crack passage stress by adjustable stress chip chucking device, and then influence
Two-phase flow feature.Stress field and the big disadvantage of practical flowing environment difference can not be applied by overcoming traditional microcosmos experiment.3. can
The simulated conditions of proof stress field, temperature field and seepage field respectively, multiple physical field couplings can not be carried out by changing existing equipment
The phenomenon that conjunction.
It takes or uses for reference prior art and can be realized in the part that do not addressed in aforesaid way.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (9)
1. Micro-flows visual testing device under a kind of coupling, it is characterised in that: including sliding cover type glass box, in cunning
Lid formula glass box is internally provided with PMMA chip test specimen, and the inside of the PMMA chip test specimen is formed with crack passage；
One end of PMMA chip test specimen is provided with ingate, ingate is connect by liquid input tube road with the first hydraulic pump,
It is provided with first flowmeter and reflux valve on liquid input tube road, is also connected with flow sensor on liquid input tube road,
Flow sensor is connect with the first hydraulic pump；The other end of PMMA chip test specimen is provided with outlet opening, outlet opening is defeated with liquid
Pipeline connects out, is provided with second flowmeter on liquid output pipe road；
The first pressurizing device for pressurization is provided at two short sides of PMMA chip test specimen, first pressurizing device includes
Hydraulic cavities are connect, liquid at the hydraulic piston that is internally provided with of hydraulic cavities, one end of hydraulic cavities and the short side of PMMA chip test specimen
The other end of pressure chamber is connect by hydraulic pipeline with the second hydraulic pump；
Two long edge positions of PMMA chip test specimen are provided with the second pressurizing device for pressurization, second pressurizing device includes
Head tank is internally provided with air bag and rubber stopper in head tank, and the rubber stopper is located between air bag and PMMA chip test specimen,
The air bag is connect by gas pipeline with air pump；
The side of sliding cover type glass box is provided with three-dimensional microscope, three-dimensional microscope is connected by patchcord and high-speed camera
It connects, high-speed camera is connect with data processing equipment.
2. Micro-flows visual testing device under a kind of coupling according to claim 1, it is characterised in that:
The inside of sliding cover type glass box is additionally provided with heating wire, cooling fin and the temperature for detecting sliding cover type glass box internal temperature
Sensor.
3. Micro-flows visual testing device under a kind of coupling according to claim 1, it is characterised in that: institute
Stating hydraulic cavities includes the first chamber and second chamber being connected, and the area of section of first chamber is less than the section face of second chamber
Product, second chamber are located between first chamber and PMMA chip test specimen, and the hydraulic piston is installed in first chamber, first
The end point of chamber is provided with sealing-plug.
4. Micro-flows visual testing device under a kind of coupling according to claim 1, it is characterised in that:
The junction of hydraulic cavities and PMMA chip test specimen is provided with semicircle base for post, and the planar section and PMMA chip of semicircle base for post try
Part contact, and the planar section of semicircle base for post is set as soft formation.
5. Micro-flows visual testing device under a kind of coupling according to claim 1, it is characterised in that:
The long edge position of PMMA chip test specimen is provided with first pressure sensing chip, and first pressure sensing chip is connect with first pressure sensor,
First pressure sensor is connect with air pump；Second pressure induction is provided at the position of hydraulic cavities connection PMMA chip test specimen
Piece, second pressure sensing chip are connect with second pressure sensor, and second pressure sensor is connect with the second hydraulic pump.
6. a kind of Micro-flows visual testing method under coupling, using the device as described in claim 1-5, tool
Body the following steps are included:
(1) prefabricated PMMA chip test specimen is put into sliding cover type glass box, is fixed by fixture, and and liquid input tube
Road, liquid output pipe road, the first pressurizing device and the second pressurizing device connect；Three-dimensional microscope is adjusted, and will be three-dimensional
Microscope, high-speed camera and data processing equipment are sequentially connected；
(2) it is adjusted inside sliding cover type glass box in real time by heating wire, cooling fin and temperature sensor to suitable test temperature；
(3) apply liquid to two short sides of PMMA chip test specimen by the second hydraulic pump, hydraulic pipeline, hydraulic piston and hydraulic cavities
Pressure applies gas pressure to two long sides of PMMA chip test specimen by air pump, gas pipeline, air bag and rubber stopper；Gas pressure
Power and fluid pressure pass through first pressure sensing chip, first pressure sensor and air pump and second pressure sensing chip, respectively
Two pressure sensors and the second hydraulic pump are adjusted；
(4) liquid is injected into the crack passage of PMMA chip test specimen by the first hydraulic pump, liquid input tube road and ingate,
Liquid in the crack passage of PMMA chip test specimen is discharged by outlet opening and liquid output pipe road, passes through first flowmeter respectively
The fluid flow in the fluid flow and liquid output pipe road in liquid input tube road is measured with second flowmeter；
(5) micro flow data are acquired by three-dimensional microscope and high-speed camera, and transfer data to data processing equipment,
Processing analysis is carried out using data processing equipment.
7. Micro-flows visual testing method under a kind of coupling according to claim 6, it is characterised in that: logical
It crosses the first pressurizing device and the change for simulating the stress field of flow channel is used in combination in the second pressurizing device；Not by replacement characterization
The chip of coal petrography crack shape, characteristic in the same time observes its flow-data, and it is dynamic to simulate macrospecimen to test linking by multiple groups
State variation.
8. Micro-flows visual testing method under a kind of coupling according to claim 6, it is characterised in that: logical
It crosses the variation of regulation single one physical field and observes influence of some factor for micro flow；Or change simultaneously the item of multiple physical fields
Part, to observe influence of the Multiple factors change for micro flow.
9. Micro-flows visual testing method under a kind of coupling according to claim 6, it is characterised in that: water
In purging experiment, injection liquid is handled by deionization and dyeing, in order to both observe preceding forward line, contact angle,
Flowing velocity and bubble deformation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910173766.2A CN109932298B (en) | 2019-03-08 | 2019-03-08 | Micro-scale flow visualization testing device and method under coupling effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910173766.2A CN109932298B (en) | 2019-03-08 | 2019-03-08 | Micro-scale flow visualization testing device and method under coupling effect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109932298A true CN109932298A (en) | 2019-06-25 |
| CN109932298B CN109932298B (en) | 2024-07-23 |
Family
ID=66986673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910173766.2A Active CN109932298B (en) | 2019-03-08 | 2019-03-08 | Micro-scale flow visualization testing device and method under coupling effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109932298B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220835A (en) * | 2019-07-17 | 2019-09-10 | 中国科学院武汉岩土力学研究所 | Porous Media visualization device and calculation method of parameters under a kind of in-situ stress |
| CN110296928A (en) * | 2019-07-19 | 2019-10-01 | 三峡大学 | The device and method of visualization fracture seepage is simulated using magnetic fluid |
| CN110441217A (en) * | 2019-08-30 | 2019-11-12 | 舟山市博远科技开发有限公司 | A kind of permeation unit of concrete test block and analyzer with the permeation unit |
| CN110793901A (en) * | 2019-12-13 | 2020-02-14 | 西南石油大学 | High-temperature high-pressure gas reservoir permeability flow rate sensitivity test method considering bound water |
| CN112444472A (en) * | 2020-11-23 | 2021-03-05 | 中国地质科学院水文地质环境地质研究所 | Experimental method for simulating gas phase blockage in groundwater recharge process |
| CN112881259A (en) * | 2021-01-18 | 2021-06-01 | 山东科技大学 | Visualization device and method for measuring gas-water relative permeability of joint network based on steady state method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106959263A (en) * | 2017-02-28 | 2017-07-18 | 河南工程学院 | One kind carrying cleat in coal observation and gas porous flow visual experimental apparatus |
| CN209727715U (en) * | 2019-03-08 | 2019-12-03 | 山东科技大学 | Micro-flows visual testing device under a kind of coupling |
-
2019
- 2019-03-08 CN CN201910173766.2A patent/CN109932298B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106959263A (en) * | 2017-02-28 | 2017-07-18 | 河南工程学院 | One kind carrying cleat in coal observation and gas porous flow visual experimental apparatus |
| CN209727715U (en) * | 2019-03-08 | 2019-12-03 | 山东科技大学 | Micro-flows visual testing device under a kind of coupling |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220835A (en) * | 2019-07-17 | 2019-09-10 | 中国科学院武汉岩土力学研究所 | Porous Media visualization device and calculation method of parameters under a kind of in-situ stress |
| CN110220835B (en) * | 2019-07-17 | 2024-03-08 | 中国科学院武汉岩土力学研究所 | Porous medium seepage visualization device under in-situ stress and parameter calculation method |
| CN110296928A (en) * | 2019-07-19 | 2019-10-01 | 三峡大学 | The device and method of visualization fracture seepage is simulated using magnetic fluid |
| CN110441217A (en) * | 2019-08-30 | 2019-11-12 | 舟山市博远科技开发有限公司 | A kind of permeation unit of concrete test block and analyzer with the permeation unit |
| CN110441217B (en) * | 2019-08-30 | 2023-06-06 | 舟山市博远科技开发有限公司 | Penetration unit of concrete test block and tester with penetration unit |
| CN110793901A (en) * | 2019-12-13 | 2020-02-14 | 西南石油大学 | High-temperature high-pressure gas reservoir permeability flow rate sensitivity test method considering bound water |
| CN110793901B (en) * | 2019-12-13 | 2022-02-11 | 西南石油大学 | High-temperature high-pressure gas reservoir permeability flow rate sensitivity test method considering bound water |
| CN112444472A (en) * | 2020-11-23 | 2021-03-05 | 中国地质科学院水文地质环境地质研究所 | Experimental method for simulating gas phase blockage in groundwater recharge process |
| CN112881259A (en) * | 2021-01-18 | 2021-06-01 | 山东科技大学 | Visualization device and method for measuring gas-water relative permeability of joint network based on steady state method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109932298B (en) | 2024-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109932298A (en) | Micro-flows visual testing device and method under a kind of coupling | |
| CN106645158B (en) | Device and test method for rock mass fracture three-phase flow displacement dispersion capture research | |
| CN207215709U (en) | Device for rock cranny three-phase flow displacement disperse capture research | |
| CN209727715U (en) | Micro-flows visual testing device under a kind of coupling | |
| CN106501155A (en) | Rock core gas liquid two purpose permeability test device and reservoir damage evaluation method | |
| CN207231901U (en) | A kind of core holding unit component | |
| CN106017823A (en) | Sealing detection device | |
| CN104807508A (en) | Digital display flow meter for experiment teaching based on piezometer tube display and measuring method thereof | |
| CN104568287A (en) | Device for directly measuring pressure inside micro-channel by the aid of deformation of PDMS (polydimethylsiloxane) film | |
| CN112881259A (en) | Visualization device and method for measuring gas-water relative permeability of joint network based on steady state method | |
| CN114659935A (en) | Method and device for measuring viscosity of trace liquid and flow resistance of micro-channel | |
| CN105628666A (en) | Method for determining average flow speed and shearing force of uniform and flat micro channel based on concentration of dynamic fluorescent powder | |
| CN115855358A (en) | Measurement of shale oil reservoir CO 2 Device and method for minimum miscible pressure of miscible flooding | |
| CN107389502B (en) | A kind of method and system measuring liquid viscosity | |
| CN108169071A (en) | Oil viscosity detection device under a kind of ultra-high voltage environment | |
| CN109187277A (en) | Gas liquid film moving distance acquisition methods in a kind of micron capillary tube passage | |
| CN115814867B (en) | Method for rapidly determining dew point bubble point by utilizing microfluidic chip | |
| CN104089754A (en) | Method and device for capturing bubble polymerization process | |
| CN106768843B (en) | Pinhole jet type two-phase flow dynamic observation device | |
| CN206387687U (en) | Portable viscosity detecting device | |
| CN105242029A (en) | Fluid phase state analysis device and analysis method thereof | |
| CN215727576U (en) | Visual porous medium seepage flow measurement experimental device | |
| CN106124705B (en) | A kind of biphase gas and liquid flow simulator | |
| CN109100485B (en) | A kind of micron capillary column gas-liquid dynamic phase interface test macro | |
| CN208125557U (en) | Oil viscosity detection device under a kind of ultra-high voltage environment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |