CN113237793A - Display experiment method and device for coupling bubble internal flow and bubble external mass transfer - Google Patents
Display experiment method and device for coupling bubble internal flow and bubble external mass transfer Download PDFInfo
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- 238000012546 transfer Methods 0.000 title claims abstract description 32
- 238000002474 experimental method Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000008878 coupling Effects 0.000 title claims abstract description 19
- 238000010168 coupling process Methods 0.000 title claims abstract description 19
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 19
- 239000000779 smoke Substances 0.000 claims abstract description 102
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 63
- 239000007788 liquid Substances 0.000 claims abstract description 34
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000001301 oxygen Substances 0.000 claims abstract description 31
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 31
- 238000012545 processing Methods 0.000 claims abstract description 26
- PLXBWHJQWKZRKG-UHFFFAOYSA-N Resazurin Chemical compound C1=CC(=O)C=C2OC3=CC(O)=CC=C3[N+]([O-])=C21 PLXBWHJQWKZRKG-UHFFFAOYSA-N 0.000 claims abstract description 24
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims abstract description 22
- 239000008103 glucose Substances 0.000 claims abstract description 22
- 239000000243 solution Substances 0.000 claims description 70
- 230000002572 peristaltic effect Effects 0.000 claims description 18
- 239000004509 smoke generator Substances 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 12
- 230000005587 bubbling Effects 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 8
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 7
- 239000000700 radioactive tracer Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 229910001882 dioxygen Inorganic materials 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 abstract description 4
- 239000007791 liquid phase Substances 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000011161 development Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 description 9
- 238000000926 separation method Methods 0.000 description 5
- HSSLDCABUXLXKM-UHFFFAOYSA-N resorufin Chemical compound C1=CC(=O)C=C2OC3=CC(O)=CC=C3N=C21 HSSLDCABUXLXKM-UHFFFAOYSA-N 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000012071 phase Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N2021/8405—Application to two-phase or mixed materials, e.g. gas dissolved in liquids
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Abstract
The invention relates to a display experiment method and a display experiment device for coupling bubble internal flow and bubble external mass transfer. The method comprises the steps of utilizing resazurin color development reaction and smoke as tracing particles, adding prepared resazurin solution with certain concentration, sodium hydroxide solution and glucose solution into a bubble observation chamber to reach a certain liquid level, introducing mixed gas of oxygen and smoke, and displaying the phenomenon of fluid flow inside the bubbles and liquid phase mass transfer outside the bubbles by means of a high-speed camera and an image processing system. The phenomenon of internal flowing of the trapped bubbles is obvious, and the tail trace of the outward mass transfer of the bubbles is clear.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the field of chemical separation and mass transfer, and particularly relates to a display experiment method and device for coupling bubble internal flow and bubble external mass transfer.
[ background of the invention ]
Rectification is widely applied to separation of liquid mixtures, and has the advantages of large treatment capacity, strong applicability and the like, but the separation efficiency is low due to insufficient contact of gas and liquid on a rectification column plate. For the high-purity separation of a near-boiling point mixture, an azeotropic mixture and the like, the low separation efficiency can cause the problems of serious energy consumption and the like. The main form of gas-liquid coexistence on the rectifying tower plate is bubbles, and the process of transferring volatile components in the mixture from a gas phase to a liquid phase is mainly influenced by mass transfer of an interface, a liquid side and a gas side. Research on internal flow and external mass transfer of bubbles is of great significance to the strengthening of the rectification process, but at present, great breakthrough is not made on an experimental method and an experimental device for simultaneously displaying internal flow and external mass transfer of bubbles, so that development of an experimental method and an experimental device capable of displaying the internal flow form of bubbles and simultaneously reflecting external mass transfer of bubbles is urgently needed.
[ summary of the invention ]
[ problem to be solved ]
The invention aims to solve the problem that the current research on the internal flow and the external mass transfer of bubbles lacks a proper research method and device, and simultaneously captures the internal flow phenomenon and the external mass transfer behavior of rising bubbles by means of an image capture processing technology, so that the fluid flow and mass transfer phenomenon can be further deeply analyzed, and a display experimental device for coupling the internal flow and the external mass transfer of bubbles can be further developed.
[ solution ]
The invention is realized by the following technical scheme.
The invention overcomes the defect that the phenomenon of internal flow and external mass transfer of bubbles cannot be captured and displayed simultaneously, and provides a display experiment method and a display experiment device for coupling the internal flow and the external mass transfer of bubbles. The invention relates to a preparation method of resazurin solution, sodium hydroxide solution and glucose solution with proper concentration, which is important for a display experiment method for coupling bubble internal flow and bubble external mass transfer. The resazurin solution, the sodium hydroxide solution and the glucose solution are used as liquid phases, pure oxygen is used as a gas phase, the resazurin dissolved in the liquid at the beginning is blue, at the moment, the excessive sodium hydroxide solution and the glucose solution are added, the resazurin is reduced into pink resorufin solution, and the resazurin is further reduced into colorless resorufin solution by the excessive glucose. After pure oxygen is introduced, the colorless perhydrogen resorufin solution is oxidized into pink resorufin solution again, and the phenomenon of out-bubble mass transfer can be well displayed and captured according to the discoloration phenomenon of the reaction. Meanwhile, the smoke tracer agent wrapped by the oxygen forms a smoke line along with the rising process of the oxygen bubbles, and can be used for capturing the flowing phenomenon of fluid in the bubbles.
A display experiment method and device for coupling bubble internal flow and bubble external mass transfer are mainly characterized by comprising the following devices: the system comprises a smoke generator (S1), an oxygen gas storage tank (S2), an excess smoke collector (S3), a rectangular mixer (S4), a laser generator (S5), a laser light guide arm (S6), a laser output cylinder (S7), a bubble observation chamber (S8), a bubbling needle (S9), a buffer chamber (S10), a high-speed camera (S11), an image processing system (S12), an air pump (P1), an oxygen peristaltic pump (P2), a smoke valve (V1), an excess smoke valve (V2), an air valve (V3) and a mixed smoke valve (V4); an air pump (P1) is sequentially connected with a bubble observation chamber (S8) through an air valve (V3), a buffer chamber (S10) and a bubbling needle (S9) to introduce air into the bubble observation chamber (S8), the bubble observation chamber (S8) is filled with resazurin solution, sodium hydroxide solution and glucose solution which are prepared at a certain liquid level height, a smoke generator (S1) is connected with a rectangular mixer (S4) through a smoke valve (V1) to introduce smoke tracer into the rectangular mixer (S4), thin pipe interfaces on four surfaces of the rectangular mixer (S4) are respectively connected with the smoke valve (V1), an oxygen peristaltic pump (P2), an excess smoke valve (V2) and a mixed smoke valve (V4), the excess smoke valve (V2) is connected with an excess smoke collector (S3) to introduce the excess smoke collector (S3) into an excess smoke mixer (S4), the oxygen peristaltic pump (P2) is connected with an oxygen storage tank (S2) to convey the mixture into the oxygen storage tank (S4), the mixed smoke valve (V4) is sequentially connected with the buffer chamber (S10), the bubbling needle (S9) and the bubble observation chamber (S8), the laser generator (S5) is sequentially connected with the laser light guide arm (S6) and the laser output cylinder (S7) so that laser irradiates the bubble observation chamber (S8) vertically downwards, and the high-speed camera (S11) is connected with the image processing system (S12) for image capture and processing.
It is preferable that: the concentration range of the prepared resazurin solution is 0.12g/L-1.2g/L, the concentration range of the sodium hydroxide solution is 0.5g/L-2.0g/L, and the concentration range of the glucose solution is 15g/L-45 g/L.
It is preferable that: the side length of the rectangular mixer (S4) is 8cm-12cm, four surfaces are connected with four thin tube interfaces, and the tube diameter of the thin tube interfaces is 5mm-8 mm.
It is preferable that: the liquid level height in the bubble injection observation chamber (S8) is 12cm-18 cm.
It is preferable that: the laser output cylinder (S7) is vertically downward 40-55 cm away from the liquid level of the solution in the bubble observing chamber (S8), and the laser forms an angle of 90 degrees with the liquid level in the bubble observing chamber (S8).
Because the liquid in the bubble observation chamber (S8) is easy to flow backwards, the invention adopts the independent air pump (P1) channel connected with the air valve (V3) to ventilate, thereby preventing the backflow phenomenon.
The preferred laser output barrel (S7) is vertically spaced from 40cm to 55cm below the liquid level of the solution in the bubble observing chamber (S8), and the laser is at 90 degrees to the liquid level in the bubble observing chamber (S8). The method aims to realize that the part with the strongest laser beam energy is just tangent to the rising bubble, and at the moment, the proper laser energy and the bright visual field range are debugged to capture the image of the rising bubble.
The experiment realized by the display experiment method and the device for coupling the bubble internal flow and the bubble external mass transfer mainly comprises the following steps:
preparing a resazurin solution, a sodium hydroxide solution and a glucose solution with certain concentrations, starting an image processing system (S12) and a laser generator (S5), and connecting a high-speed camera (S11);
secondly, turning on an air pump (P1), and ventilating air into the bubble observation chamber (S8) through an air valve (V3);
thirdly, after a period of ventilation, slowly injecting the prepared resazurin solution, sodium hydroxide solution and glucose solution into a bubble observation chamber (S8) to a certain liquid level height;
opening a smoke generator (S1) and a smoke valve (V1) to charge smoke into the rectangular mixer (S4), closing the smoke valve (V1) and the smoke generator (S1) after certain smoke is charged, and opening an excess smoke valve (V2) to discharge excess smoke to an excess smoke collector (S3);
closing the redundant smoke valve (V2) and simultaneously opening the oxygen peristaltic pump (P2) to convey oxygen in the oxygen storage tank (S2) to the rectangular mixer (S4), opening the mixed smoke valve (V4) and simultaneously closing the air valve (V3) and the air pump (P1), and blowing bubbles with smoke into the bubble observation chamber (S8) by the bubble blowing needle (S9) through the buffer chamber (S10);
sixthly, turning on a laser generator (S5), adjusting a laser guide arm (S6) and a laser output cylinder (S7), simultaneously turning on a high-speed camera (S11) to capture images, and processing the images by an image processing system (S12);
and seventhly, when the experiment is finished, closing the laser generator (S5), the high-speed camera (S11) and the image processing system (S12), pouring out the liquid in the bubble observation chamber (S8), and closing the oxygen peristaltic pump (P2) and the mixed smoke valve (V4).
[ advantageous effects ]
Compared with the prior art, the invention mainly has the following beneficial effects:
(1) the experimental device can clearly display the mass transfer phenomenon outside the bubble and the flow phenomenon of fluid inside the bubble.
(2) The preferred rectangular mixer (S4) allows for good control of the concentration of the smoke tracer, improving its controllability and greatly increasing the clarity of the flow phenomenon inside the bubbles.
(3) The cooperation of the air valve (V3) and the mixed smoke valve (V4) enhances the continuity of rising bubbles.
(4) The irradiation position, distance and liquid level height of the laser beam are strictly controlled, and the display definition of the bubble internal flow phenomenon of the rising bubble is enhanced.
[ description of the drawings ]
FIG. 1 is a schematic diagram of a display experiment method and apparatus for coupling bubble internal flow and bubble external mass transfer according to the present invention.
In the figure: s1-smoke generator, S2-oxygen gas storage tank, S3-excess smoke collector, S4-rectangular mixer, S5-laser generator, S6-laser guide arm, S7-laser output cylinder, S8-bubble observation chamber, S9-bubble needle, S10-buffer chamber, S11-high-speed camera, S12-image processing system, P1-air pump, P2-oxygen peristaltic pump, V1-smoke valve, V2-excess smoke valve, V3-air valve and V4-mixed smoke valve.
[ detailed description ] embodiments
The invention will be further described with reference to the accompanying drawings.
The first embodiment is as follows:
the invention relates to a display experiment method and a display experiment device for coupling bubble internal flow and bubble external mass transfer, which are used for a laboratory bubble movement parameter determination experiment.
Preparing a resazurin solution with the concentration of 0.12g/L, a sodium hydroxide solution with the concentration of 0.5g/L and a glucose solution with the concentration of 15g/L, starting a power supply, starting an image processing system (S12) and a laser generator (S5), and connecting a high-speed camera (S11) to complete the connection of the PIV device.
Secondly, the air pump (P1) is started, the air valve (V3) is opened after a period of time, the valve is in a full-open state, and air is led into the bubble observation chamber (S8).
Thirdly, after the air is introduced for a period of time, slowly adding the previously prepared resazurin solution of 0.12g/L, sodium hydroxide solution of 0.5g/L and glucose solution of 15g/L into the bubble observation chamber (S8) until the liquid level is 12cm, observing the bubbling condition of the liquid and checking whether the device has the phenomenon of back flow.
And fourthly, opening the smoke generator (S1) to charge smoke into the rectangular mixer (S4), closing the smoke valve (V1) after dense smoke is filled, opening the redundant smoke valve (V2) to discharge redundant smoke, and controlling the smoke concentration of the rectangular mixer (S4).
Closing the redundant smoke valve (V2), simultaneously opening the oxygen peristaltic pump (P2) and setting the power of the oxygen peristaltic pump, conveying pure oxygen in the oxygen storage tank (S2) into a rectangular mixer (S4) with the side length of 8cm, wherein the pipe diameter of a thin pipe interface is 5mm, opening the mixed smoke valve (V4) and simultaneously closing an air valve (V3), slowly opening the mixed smoke valve (V4), opening the valve until smoke rises in a buffer chamber (S10), and blowing tracer bubbles with smoke with certain concentration into the bubble observation chamber (S8) through a bubble blowing needle (S9) by smoke in the buffer chamber (S10) to enable the rising bubbles to generate continuous smoke lines.
Sixthly, turning on a laser generator (S5), adjusting proper laser energy until the laser is 90 degrees to the liquid level in the bubble observation chamber (S8), enabling the laser output cylinder (S7) to be 40cm away from the liquid level of the solution in the bubble observation chamber (S8), simultaneously turning on a high-speed camera (S11) to capture images, and processing and analyzing the obtained images by an image processing system.
Seventhly, after the test is finished, firstly closing the mixed smoke valve (V4), pouring 0.12g/L of resazurin solution, 0.5g/L of sodium hydroxide solution and 15g/L of glucose solution from the bubble observation chamber (S8), then closing the oxygen peristaltic pump (P2) and the mixed smoke valve (V4), closing the laser generator (S5), closing the high-speed camera (S11) and finally closing the power supply.
Example two:
the invention relates to a display experiment method and a display experiment device for coupling bubble internal flow and bubble external mass transfer, which are used for simulating the movement of bubbles in a bubble tower.
Preparing a resazurin solution with the concentration of 0.8g/L, a sodium hydroxide solution with the concentration of 1.2g/L and a glucose solution with the concentration of 25g/L, starting a power supply, starting an image processing system (S12) and a laser generator (S5), and connecting a high-speed camera (S11) to complete the connection of the PIV device.
Secondly, the air pump (P1) is started, the air valve (V3) is opened after a period of time, the valve is in a full-open state, and air is led into the bubble observation chamber (S8).
Thirdly, after the air is introduced for a period of time, slowly adding the previously prepared resazurin solution with the concentration of 0.8g/L, 1.2g/L sodium hydroxide solution and 25g/L glucose solution into a bubble observation chamber (S8) until the liquid level is 15cm, observing the bubbling condition of the liquid and checking whether the device has the phenomenon of back flow.
And fourthly, opening the smoke generator (S1) to charge smoke into the rectangular mixer (S4), closing the smoke valve (V1) after dense smoke is filled, opening the redundant smoke valve (V2) to discharge redundant smoke, and controlling the smoke concentration of the rectangular mixer (S4).
And (6) closing the redundant smoke valve (V2), simultaneously opening the oxygen peristaltic pump (P2) and setting the power of the oxygen peristaltic pump, conveying pure oxygen in the oxygen storage tank (S2) to a cubic rectangular mixer (S4) with the side length of 10cm, wherein the pipe diameter of a thin pipe interface is 6mm, opening the mixed smoke valve (V4) and simultaneously closing an air valve (V3), slowly opening the mixed smoke valve (V4), opening the valve until smoke rises in the buffer chamber (S10), and blowing tracer bubbles with smoke with a certain concentration into the bubble observation chamber (S8) through a bubble blowing needle (S9) by smoke in the buffer chamber (S10) to enable the rising bubbles to generate continuous smoke lines.
Sixthly, turning on a laser generator (S5), adjusting proper laser energy until the laser is 90 degrees to the liquid level in the bubble observation chamber (S8), enabling the laser output cylinder (S7) to be 48cm away from the liquid level of the solution in the bubble observation chamber (S8), simultaneously turning on a high-speed camera (S11) to capture images, and processing and analyzing the obtained images by an image processing system.
Seventhly, after the test is finished, firstly closing a mixed smoke valve (V4), pouring the resazurin solution with the concentration of 0.8g/L, the sodium hydroxide solution with the concentration of 1.2g/L and the glucose solution with the concentration of 25g/L from the bubble observation chamber (S8), then closing the power equipment, closing the laser generator (S5), closing the high-speed camera (S11) and finally closing the power supply.
Example three:
the invention relates to a display experiment method and a display experiment device for coupling bubble internal flow and bubble external mass transfer, which are used for simulating the movement of bubbles on a large-diameter rectifying tower plate.
Preparing a resazurin solution with the concentration of 1.2g/L, a sodium hydroxide solution with the concentration of 2.0g/L and a glucose solution with the concentration of 45g/L, starting a power supply, starting an image processing system (S12) and a laser generator (S5), and connecting a high-speed camera (S11) to complete the connection of the PIV device.
Secondly, the air pump (P1) is started, the air valve (V3) is opened after a period of time, the valve is in a full-open state at the beginning, and air is led into the bubble observation chamber (S8).
Thirdly, after the air is introduced for a period of time, slowly adding the previously prepared resazurin solution with the concentration of 1.2g/L, 2.0g/L sodium hydroxide solution and 45g/L glucose solution into the bubble observation chamber (S8) until the liquid level height is 18cm, closing the valve opening of the air valve (V3), observing the bubbling condition of the liquid and checking whether the device has the backflow phenomenon.
And fourthly, opening the smoke generator (S1) to charge smoke into the rectangular mixer (S4), closing the smoke valve (V1) after dense smoke is filled, opening the redundant smoke valve (V2) to discharge redundant smoke, and controlling the smoke concentration of the rectangular mixer (S4).
And (6) closing the redundant smoke valve (V2), simultaneously opening the oxygen peristaltic pump (P2) and setting the power of the oxygen peristaltic pump, conveying pure oxygen in the oxygen storage tank (S2) to a rectangular mixer (S4) with the side length of 12cm, wherein the pipe diameter of a thin pipe interface is 8mm, opening the mixed smoke valve (V4) and simultaneously closing an air valve (V3), instantly opening the mixed smoke valve (V4), generating tracer large bubbles with smoke with certain concentration in a bubble observation chamber (S8), generating continuous smoke lines in the rising bubbles, and observing the smoke lines generated in the large bubbles.
Sixthly, turning on a laser generator (S5), adjusting proper laser energy until the laser is 90 degrees to the liquid level in the bubble observation chamber (S8), enabling the laser output cylinder (S7) to be 55cm away from the liquid level of the solution in the bubble observation chamber (S8), simultaneously turning on a high-speed camera (S11) to capture images, and processing and analyzing the obtained images by an image processing system.
Seventhly, after the test is finished, firstly closing a mixed smoke valve (V4), pouring the resazurin solution with the concentration of 1.2g/L, the sodium hydroxide solution with the concentration of 2.0g/L and the glucose solution with the concentration of 45g/L from the bubble observation chamber (S8), then closing the power equipment, closing the laser generator (S5), closing the high-speed camera (S11) and finally closing the power supply.
Claims (6)
1. A display experiment method and device for coupling bubble internal flow and bubble external mass transfer are mainly characterized by comprising the following devices: the system comprises a smoke generator (S1), an oxygen gas storage tank (S2), an excess smoke collector (S3), a rectangular mixer (S4), a laser generator (S5), a laser light guide arm (S6), a laser output cylinder (S7), a bubble observation chamber (S8), a bubbling needle (S9), a buffer chamber (S10), a high-speed camera (S11), an image processing system (S12), an air pump (P1), an oxygen peristaltic pump (P2), a smoke valve (V1), an excess smoke valve (V2), an air valve (V3) and a mixed smoke valve (V4); an air pump (P1) is sequentially connected with a bubble observation chamber (S8) through an air valve (V3), a buffer chamber (S10) and a bubbling needle (S9) to introduce air into the bubble observation chamber (S8), the bubble observation chamber (S8) is filled with resazurin solution, sodium hydroxide solution and glucose solution which are prepared at a certain liquid level height, a smoke generator (S1) is connected with a rectangular mixer (S4) through a smoke valve (V1) to introduce smoke tracer into the rectangular mixer (S4), thin pipe interfaces on four surfaces of the rectangular mixer (S4) are respectively connected with the smoke valve (V1), an oxygen peristaltic pump (P2), an excess smoke valve (V2) and a mixed smoke valve (V4), the excess smoke valve (V2) is connected with an excess smoke collector (S3) to introduce the excess smoke collector (S3) into an excess smoke mixer (S4), the oxygen peristaltic pump (P2) is connected with an oxygen storage tank (S2) to convey the mixture into the oxygen storage tank (S4), the mixed smoke valve (V4) is sequentially connected with the buffer chamber (S10), the bubbling needle (S9) and the bubble observation chamber (S8), the laser generator (S5) is sequentially connected with the laser light guide arm (S6) and the laser output cylinder (S7) so that laser irradiates the bubble observation chamber (S8) vertically downwards, and the high-speed camera (S11) is connected with the image processing system (S12) for image capture and processing.
2. The method and apparatus for displaying experiments coupling bubble internal flow and bubble external mass transfer as claimed in claim 1, wherein: the concentration range of the prepared resazurin solution is 0.12g/L-1.2g/L, the concentration range of the sodium hydroxide solution is 0.5g/L-2.0g/L, and the concentration range of the glucose solution is 15g/L-45 g/L.
3. The method and apparatus for displaying experiments coupling bubble internal flow and bubble external mass transfer as claimed in claim 1, wherein: the side length of the rectangular mixer (S4) is 8cm-12cm, four surfaces are connected with four thin tube interfaces, and the tube diameter of the thin tube interfaces is 5mm-8 mm.
4. The method and apparatus for displaying experiments coupling bubble internal flow and bubble external mass transfer as claimed in claim 1, wherein: the liquid level height in the bubble injection observation chamber (S8) is 12cm-18 cm.
5. The method and apparatus for displaying experiments coupling bubble internal flow and bubble external mass transfer as claimed in claim 1, wherein: the laser output cylinder (S7) is vertically downward 40-55 cm away from the liquid level of the solution in the bubble observing chamber (S8), and the laser forms an angle of 90 degrees with the liquid level in the bubble observing chamber (S8).
6. A method for conducting experiments using the display experiment method and apparatus for coupling bubble internal flow with bubble external mass transfer as claimed in claim 1, comprising the steps of:
preparing a resazurin solution, a sodium hydroxide solution and a glucose solution with certain concentrations, starting an image processing system (S12) and a laser generator (S5), and connecting a high-speed camera (S11);
secondly, turning on an air pump (P1), and ventilating air into the bubble observation chamber (S8) through an air valve (V3);
thirdly, after a period of ventilation, slowly injecting the prepared resazurin solution, sodium hydroxide solution and glucose solution into a bubble observation chamber (S8) to a certain liquid level height;
opening a smoke generator (S1) and a smoke valve (V1) to charge smoke into the rectangular mixer (S4), closing the smoke valve (V1) and the smoke generator (S1) after certain smoke is charged, and opening an excess smoke valve (V2) to discharge excess smoke to an excess smoke collector (S3);
closing the redundant smoke valve (V2), simultaneously opening the oxygen peristaltic pump (P2) to convey oxygen in the oxygen storage tank (S2) to the rectangular mixer (S4), opening the mixed smoke valve (V4) and simultaneously closing the air valve (V3) and the air pump (P1), and blowing bubbles with smoke into the bubble observation chamber (S8) by the bubble blowing needle (S9) through the buffer chamber (S10);
sixthly, turning on a laser generator (S5), adjusting a laser guide arm (S6) and a laser output cylinder (S7), simultaneously turning on a high-speed camera (S11) for image capturing, and performing image processing by an image processing system (S12);
and seventhly, when the experiment is finished, closing the laser generator (S5), the high-speed camera (S11) and the image processing system (S12), pouring out the liquid in the bubble observation chamber (S8), and closing the oxygen peristaltic pump (P2) and the mixed smoke valve (V4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110498469.2A CN113237793B (en) | 2021-05-08 | 2021-05-08 | Display experiment method and device for coupling bubble internal flow and bubble external mass transfer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110498469.2A CN113237793B (en) | 2021-05-08 | 2021-05-08 | Display experiment method and device for coupling bubble internal flow and bubble external mass transfer |
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| CN115290645A (en) * | 2022-08-01 | 2022-11-04 | 中国矿业大学(北京) | Device and method for simulating influence of side wall on fire burning behavior of storage tank oil pool |
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