CN114166467A - Particle sedimentation flow field measurement and control device and use method thereof - Google Patents
Particle sedimentation flow field measurement and control device and use method thereof Download PDFInfo
- Publication number
- CN114166467A CN114166467A CN202111490071.0A CN202111490071A CN114166467A CN 114166467 A CN114166467 A CN 114166467A CN 202111490071 A CN202111490071 A CN 202111490071A CN 114166467 A CN114166467 A CN 114166467A
- Authority
- CN
- China
- Prior art keywords
- particle
- particles
- power
- sedimentation
- flow field
- 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.)
- Pending
Links
- 239000002245 particle Substances 0.000 title claims abstract description 172
- 238000004062 sedimentation Methods 0.000 title claims abstract description 59
- 238000005259 measurement Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000008569 process Effects 0.000 claims abstract description 11
- 239000012530 fluid Substances 0.000 claims abstract description 9
- 238000000917 particle-image velocimetry Methods 0.000 claims description 18
- 230000000007 visual effect Effects 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 claims description 5
- 238000012805 post-processing Methods 0.000 claims description 4
- 230000001960 triggered effect Effects 0.000 claims description 4
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000002474 experimental method Methods 0.000 abstract description 8
- 238000011160 research Methods 0.000 abstract description 2
- 239000011521 glass Substances 0.000 description 6
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229920005439 Perspex® Polymers 0.000 description 1
- 229920005372 Plexiglas® Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
Abstract
The invention provides a particle sedimentation flow field measurement control device and a use method thereof. The particle sedimentation control system comprises a sedimentation barrel, and a particle release frame and a power-off electromagnet are arranged at the upper part of the sedimentation barrel; the particle motion tracking system mainly comprises an electric sliding rail, a programmable control console and an L-shaped load plate arranged on the sliding rail, wherein the L-shaped load plate can realize controllable motion on the electric sliding rail; the PIV flow field measurement system mainly comprises a laser and a high-speed camera, wherein the laser obtains the motion condition of the tracing particles by illuminating the surface to be measured. The invention is applied to the research of multi-particle sedimentation experiments, can ensure the consistent initial motion state of particles, can greatly reduce the errors caused by the large particle sedimentation velocity/surrounding fluid flow velocity ratio and the splicing of a flow field, and can finally complete the capture of the surrounding fine flow field in the particle motion process.
Description
Technical Field
The application relates to the technical field of hydrodynamics and flow visualization, in particular to a particle sedimentation flow field measurement control device and a using method thereof.
Background
Experimental study of particle settling the initial conditions were very tightly controlled. The success or failure of the experiment is directly determined by the control precision of initial conditions such as the multi-particle release time, the initial particle speed, the initial particle motion state and the like. The current methods for controlling the initial conditions of particle sedimentation are: (1) releasing the particles by utilizing the inclined plate and the vertical baffle, drawing the vertical baffle upwards, moving the particles along the inclined plate under the action of gravity, and finally releasing the particles at the bottom of the inclined plate; (2) the two flat plates with slotted holes are utilized to release multiple particles, the lower flat plate is horizontally dragged, and when the slotted holes of the upper flat plate and the lower flat plate penetrate through, the particles can be released; (3) sucking the particles by a pasteur pipette, and releasing the particles by increasing air pressure into the pipette; (4) fixing the particles by using an L-shaped mechanical device and a vertical baffle, and realizing synchronous release of the particles by horizontally moving the L-shaped mechanical device; the methods have the problems that the multi-particle release time, the release initial speed, whether the rotation is completely the same and the like, and have great influence on experimental results.
The flow measurement of fluid around particles mostly adopts a particle image velocimetry technology at present, and the poly focus is in the whole falling process of the particles, so that the experimental research of close-range small-scale multi-particle sedimentation flow field tracking measurement is lacked. The high-speed camera is far away from the camera position, small in particle, low in imaging resolution and low in experimental data precision; the high-speed camera is placed close, the difference between the movement speed of particles and fluid in a particle size range and the movement speed of peripheral fluid is large, the dynamic range of flow rate is large, in addition, the visual field range of the camera is small, data splicing is needed, and the accuracy of the obtained flow rate data is still low.
In order to solve the problem of inconsistent initial motion states such as multi-particle release time, initial release speed and rotation, and to obtain accurate short-distance small-scale multi-particle sedimentation overall process flow field measurement data, it is necessary to develop a set of control device and method suitable for accurately obtaining short-distance small-scale multi-particle sedimentation overall process flow field accurate measurement.
Disclosure of Invention
In view of the above, it is desirable to provide a particle sedimentation flow field measurement and control apparatus and a method for using the same to solve at least one of the above problems.
The embodiment of the application provides a particle sedimentation flow field measurement control device, which comprises a particle sedimentation control system, a particle motion tracking system and a PIV flow field measurement system,
the particle sedimentation control system comprises a sedimentation barrel, a particle release frame and a power-off electromagnet, wherein the particle release frame is installed on the upper part of the sedimentation barrel, the power-off electromagnet is slidably installed on the particle release frame, and the power-off electromagnet magnetically adsorbs particles when power is off and releases the particles when power is on;
the particle motion tracking system comprises an electric sliding rail and a programmable control platform, wherein an L-shaped load plate capable of moving up and down along the electric sliding rail is mounted on the electric sliding rail, and the programmable control platform can control the L-shaped load plate to move;
the PIV flow field measuring system comprises a laser and a high-speed camera; the laser is used for irradiating settled particles, the high-speed camera is installed on the L-shaped load plate, and the programmable control console controls the L-shaped load plate to drive the high-speed camera to move along with the particles.
Furthermore, a sliding groove is formed in the middle of the particle release frame, and the upper part of the power-losing type electromagnet is slidably arranged on the sliding groove through a screw; the power-off electromagnet comprises a conductive coil, a soft magnetic iron core and a cylindrical permanent magnet; the soft magnetic iron core is sleeved on the cylindrical permanent magnet, the conductive coil is wound outside the soft magnetic iron core, and the magnetic pole generated by electrifying the conductive coil is opposite to the magnetic pole of the cylindrical permanent magnet.
Furthermore, the power-off electromagnet is connected with a programmable console through a lead, the programmable console provides a direct current power supply to drive the power-off electromagnet, and a rectifier diode and a variable resistor are further arranged in a circuit; the variable resistor is used for adjusting voltage and current and adjusting the size of the de-energized electromagnetic iron, and the rectifier diode is a passage when the power supply is switched on.
Furthermore, the height of the electric slide rail is greater than that of the top end of the sedimentation barrel, and the upper end and the lower end of the electric slide rail are respectively provided with a limiter.
Furthermore, a travel switch is mounted on the electric slide rail and used for controlling the on-off of the power-off type electromagnet circuit, and the L-shaped load plate moves downwards to contact and press the rotating arm of the travel switch to rotate, so that the circuit is switched on, and particles are released.
Furthermore, the two lasers are surface light sources, and the surface lasers emitted by the two lasers are coplanar and are on the plane where the particles move.
The embodiment of the invention also provides a use method of the particle sedimentation flow field measurement control device, which comprises the following steps:
the method comprises the following steps: the positions of the power-off electromagnets are adjusted through the sliding grooves in the particle release frame, and particles are respectively adsorbed on the power-off electromagnets;
step two: fixing a high-speed camera to enable the visual field of the high-speed camera to be a part of a sedimentation barrel, manually controlling particle sedimentation, obtaining the sedimentation speed of particles by analyzing particle tracks, and inputting speed information into a programmable control console;
step three: adjusting the position of the travel switch on the electric slide rail to enable particles to be positioned in the center of the visual field of the high-speed camera when the travel switch is triggered by the L-shaped load plate;
step four: the programmable control console controls the motor to start, the L-shaped load plate moves to trigger the travel switch, the direct-current power supply energizes the power-off type electromagnet, so that the particles are released, the high-speed camera and the particles fall synchronously, and the particles are always in the center of the field of view of the high-speed camera;
step five: and (3) superposing the motion velocity vector of the camera and the motion vector field of the fluid around the particles in the whole process of particle sedimentation through the post-processing of the particle image velocimetry technology.
Has the advantages that: compared with the prior art, the device adsorbs the example through the power-off type electromagnet, and achieves simultaneous release through electrification, so that the particles are ensured to be synchronously released without initial speed, the initial motion state of the particles is the same, and the initial spacing of the particle release can be adjusted by moving the power-off type electromagnet.
The high-speed camera is driven to move through the L-shaped load plate to track a shooting example; compared with the traditional PIV measuring means, the device can effectively eliminate the influence of particle projection on the laser surface, synchronously tracks and measures the motion vector field of fluid around particles in the whole process of particle sedimentation, solves the problems of insufficient imaging resolution caused by too far high-speed camera position, small visual field range caused by too close high-speed camera position and experimental error caused by splicing of flow fields near the particles, and acquires accurate near-distance small-scale multi-particle sedimentation whole-process flow field measurement data.
Drawings
FIG. 1 is a top view of a particle settling flow field measurement and control apparatus in an embodiment of the present invention;
FIG. 2 is a left side view of a particle settling flow field measurement control apparatus in an embodiment of the present invention;
FIG. 3 is a right side view of a particle settling flow field measurement control apparatus in an embodiment of the present invention;
FIG. 4 is a left side view of a particle settling trigger mechanism of the particle settling flow field measurement control device;
FIG. 5 is a cross-sectional view of the plexiglas settling tank of the particle settling flow field measurement and control device of FIG. 1 taken along line A-A;
FIG. 6 is a schematic diagram of a power-off type electromagnet structure of the particle sedimentation flow field measurement control device;
FIG. 7 is a particle release control circuit diagram;
FIG. 8 is a flow chart of particle simultaneous release and motion tracking;
fig. 9 is a graph of the effect of double particle settling with beating.
Description of the main element symbols:
1: an organic glass settling barrel; 2: a particle release stand; 3: a chute; 4: a power-off electromagnet; 5: a side laser; 6: a bottom laser; 7: a laboratory bench; 8: a wire; 9: an electric slide rail; 10: a high-speed camera; 11: a shockproof platform; 12: a rubber base; 13: a programmable console; 14: a travel switch; 15: a spherical holder; 16: PIV laser plane; 17: a rectifier diode; 18: a variable resistor; 91: an upper end limiter; 92: a lower end limiter; 93: an L-shaped load plate; 94: a guide rail; 95: a motor; 141: a travel switch base; 142: a rotating arm; 101: a conductive coil; 102: a soft magnetic core; 103: a cylindrical permanent magnet.
Detailed Description
The embodiments of the present application will be described in conjunction with the drawings in the embodiments of the present application, and it is to be understood that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "rear," and the like as used herein are for illustrative purposes only.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The embodiment of the invention provides a particle settlement flow field measurement control device, which comprises a particle settlement control system, a particle motion tracking system and a PIV flow field measurement system:
the particle sedimentation control system comprises a sedimentation barrel, a particle release frame and a power-off electromagnet, wherein the particle release frame is installed on the upper part of the sedimentation barrel, the power-off electromagnet is slidably installed on the particle release frame, and the power-off electromagnet magnetically adsorbs particles when power is off and releases the particles when power is on;
the particle motion tracking system comprises an electric sliding rail and a programmable control platform, wherein an L-shaped load plate capable of moving up and down along the electric sliding rail is mounted on the electric sliding rail, and the programmable control platform can control the L-shaped load plate to move;
the PIV flow field measuring system comprises a laser and a high-speed camera; the laser is used for irradiating settled particles, the high-speed camera is installed on the L-shaped load plate, and the programmable control console controls the L-shaped load plate to drive the high-speed camera to move along with the particles.
The control device suitable for the close-range small-scale multi-particle sedimentation overall process flow field accurate measurement in the embodiment is shown in fig. 1, fig. 2, fig. 3 and fig. 4, and mainly comprises a particle sedimentation control system, a particle motion tracking system and a PIV flow field measurement system. The particle sedimentation control system comprises a non-cover organic glass sedimentation barrel 1 and a lower support frame, wherein a particle release frame 2 is arranged at the upper part of the organic glass sedimentation barrel 1, and a power-off electromagnet 4 is arranged on the particle release frame 2 and can move along a sliding chute 3 on the particle release frame 2, so that the initial particle release distance is adjusted; the electric slide rail 9, the motor 95 and the programmable control console 13 are arranged on a shockproof platform 11, the shockproof platform 11 is supported on the ground through a rubber base 12, and the electric slide rail 9 is provided with a travel switch 14, an L-shaped load plate 93, an upper end limiter 91 and a lower end limiter 92; a side laser 5 is arranged on the side face of an organic glass settling barrel 1, the side laser 5 is arranged on an experiment table 7, a bottom laser 6 is arranged at the bottom of the settling barrel, a high-speed camera 10 is installed on an L-shaped load plate 93 through a spherical holder 15, and the visual field is right opposite to a PIV laser plane 16.
It will be appreciated that in other embodiments, the perspex settling cask 1 may be of other materials, so long as it is or is partially a transparent portion for viewing.
It is understood that the number of the power-off type electromagnets 4 may be set to one or more as required.
It is understood that the anti-vibration table 11 may be omitted in other embodiments.
It will be appreciated that the position of the side lasers 5, the bottom laser 6 can be adjusted as required.
As shown in fig. 1, a chute 3 is arranged in the middle of the granule releasing frame 2; the two power-off electromagnets 4 are fixed on the sliding chute 3 through tail screws and can move horizontally to adjust the initial distance; as shown in fig. 6, the particle release frame 2 is hooked on the top of the organic glass settling barrel 1 through two ends, and can move back and forth on the top of the organic glass settling barrel, so that the plane where the center line of the power-off electromagnet 4 is located is ensured to be coincident with the PIV laser plane 16.
As shown in fig. 6, the power-off type electromagnet 4 includes a conductive coil 101, a soft magnetic core 102, and a cylindrical permanent magnet 103; the conductive coil 101 is wound around the permanent magnet core 102, and the magnetic poles generated by electrifying the conductive coil 101 are opposite to the magnetic poles 103 of the cylindrical permanent magnet core. When the travel switch 14 is switched off, the power-off type electromagnet 4 is magnetic, particles are adsorbed on the power-off type electromagnet 4 at the moment, and when the travel switch 14 is switched on, the power-off type electromagnet 4 loses magnetism, and the particles are released.
As shown in fig. 7, the power-off type electromagnet control circuit comprises a power-off type electromagnet 4, a programmable console 13, a travel switch 14, a rectifier diode 17 and a variable resistor 18; the programmable control console 13 can control the operation of the electric slide rail 9 and is used as a power supply of the power-off electromagnet 4; the variable resistor 18 can adjust the voltage and the current thereof, and the existence of the parallel circuit can possibly generate the electrified self-induction current, so that when the power supply is switched on, the rectifier diode 17 can avoid the generation of the electrified self-induction current by the characteristic of unidirectional current passing, and the two de-energized electromagnets 4 can be ensured to be demagnetized simultaneously when being electrified, thereby ensuring that the particles are released simultaneously.
As shown in fig. 2, 3 and 5, the programmable console 13 can control the movement speed and the displacement interval of the L-shaped load plate 93 on the electric slide rail 9, the L-shaped load plate 93 moves along the guide rail 94 on the electric slide rail 9, and the maximum displacement interval is limited by the upper end stopper 91 and the lower end stopper 92; since the L-shaped load plate 93 gradually accelerates in a short time when it starts to move, the height of the electric slide rail 9 needs to be greater than that of the sedimentation barrel 1 to ensure that the high-speed camera 10 reaches a constant speed when moving downwards to the sedimentation barrel 1;
as shown in fig. 5, the travel switch 14 is fixedly installed on the side surface of the electric slide rail 9, the travel switch 14 includes a travel switch base 141 and a rotating arm 142, and the on/off of the circuit is controlled by the rotation of the rotating arm 142; the rotating arm is over against the L-shaped load plate 93, and the travel switch 14 and the L-shaped load plate 93 form a particle release trigger mechanism: the L-shaped load plate 93 moves downward to contact and press the travel switch rotating arm 142, the rotating arm 142 rotates, the circuit is completed, and the particles are released.
A bottom laser 6 is arranged at the bottom of the sedimentation barrel 1, a side laser 5 is arranged on a side experiment table, the two lasers are surface light sources, the directions of the two lasers can be adjusted, the two laser planes are adjusted to be coplanar, proper brightness is adjusted, and a PIV laser plane 16 is formed jointly.
Another embodiment of the present invention provides a method for using a particle sedimentation flow field measurement and control device, including the steps of:
the method comprises the following steps: the positions of the power-off electromagnets are adjusted through the sliding grooves in the particle release frame, and particles are respectively adsorbed on the power-off electromagnets;
step two: fixing a high-speed camera to enable the visual field of the high-speed camera to be a part of a sedimentation barrel, manually controlling particle sedimentation, obtaining the sedimentation speed of particles by analyzing particle tracks, and inputting speed information into a programmable control console;
step three: adjusting the position of the travel switch on the electric slide rail to enable particles to be positioned in the center of the visual field of the high-speed camera when the travel switch is triggered by the L-shaped load plate;
step four: the programmable control console controls the motor to start, the L-shaped load plate moves to trigger the travel switch, the direct-current power supply energizes the power-off type electromagnet, so that the particles are released, the high-speed camera and the particles fall synchronously, and the particles are always in the center of the field of view of the high-speed camera;
step five: and (3) superposing the motion velocity vector of the camera and the motion vector field of the fluid around the particles in the whole process of particle sedimentation through the post-processing of the particle image velocimetry technology.
The flow chart of the particle synchronous release and motion tracking is shown in fig. 8, and the specific method is as follows:
preparing before experiment, adjusting the distance between the power-off electromagnets 4 through the sliding grooves 3 on the particle release frame 2, and adsorbing particles on the power-off electromagnets 4; the laser surfaces 16 of the two lasers are well adjusted, the particle release frame 2 is adjusted, so that the center connecting line of the power-off type electromagnet 4 and the laser surfaces enable the high-speed camera 10 to be installed on the L-shaped load plate 93 through the spherical cradle head 15, and the visual field is opposite to the PIV laser surface 16;
the high speed camera 10 is fixed in a position such that its field of view is the lower half of the settling tank (where particles typically reach a steady settling velocity). Manually pressing a travel switch 14 to control the sedimentation of particles, analyzing by an image method to obtain the sedimentation speed information of the particles, inputting the speed information into a programmable console 13 to be used as the movement speed of an L-shaped load plate 93, and controlling a high-speed camera 10 to move to a position of a stopper 91 at the upper end of an electric slide rail 9;
adjusting the position of the travel switch 14 on the electric slide rail 9, performing repeated experiments to determine the height of the travel switch 14 on the electric slide rail 9, so that particles are just in the right center of the visual field of the high-speed camera 10 when the travel switch 14 is triggered, and then controlling the high-speed camera 10 to move to the highest position of the electric slide rail 9 again;
a formal experiment is carried out, the programmable control console 13 controls the motor 95 to start, the L-shaped load plate 93 moves to a certain position to trigger the travel switch 14, particles start to be released, the speed of the high-speed camera 10 at the position reaches a constant speed and falls synchronously with the particles, and the particles are always in the center of the visual field of the high-speed camera 10;
and (3) superposing the motion velocity vector of the high-speed camera 10 and the motion vector field of the fluid around the particles in the whole process of particle sedimentation through the post-processing of the particle image velocimetry technology.
To examine the effect of the present invention, an indoor particle settling experiment was performed. The size of the sedimentation barrel is 40 multiplied by 80cm, the high-speed camera frame rate is set to 1000, and the sedimentation particles are stainless steel cubes with the edge length of 20mm, so as to check whether the particle release synchronism and the high-speed camera follow-up are good. As shown in fig. 9, the stainless steel cube tracks are symmetrical, fall in sync, and are located in the center of the camera view.
As can be seen from the above inspection and analysis, the device of the present invention can ensure the synchronous release of particles, and the high-speed camera can move synchronously along with the particles, so that the movement of the whole process of particle sedimentation can be accurately presented.
In addition, those skilled in the art should realize that the above embodiments are illustrative only and not limiting to the present application, and that suitable changes and modifications to the above embodiments are within the scope of the disclosure of the present application as long as they are within the true spirit and scope of the present application.
Claims (7)
1. Particle settlement flow field measurement control device, including particle settlement control system, particle motion tracker and PIV flow field measurement system, its characterized in that:
the particle sedimentation control system comprises a sedimentation barrel, a particle release frame and a power-off electromagnet, wherein the particle release frame is installed on the upper part of the sedimentation barrel, the power-off electromagnet is slidably installed on the particle release frame, and the power-off electromagnet magnetically adsorbs particles when power is off and releases the particles when power is on;
the particle motion tracking system comprises an electric sliding rail and a programmable control platform, wherein an L-shaped load plate capable of moving up and down along the electric sliding rail is mounted on the electric sliding rail, and the programmable control platform can control the L-shaped load plate to move;
the PIV flow field measuring system comprises a laser and a high-speed camera; the laser is used for irradiating settled particles, the high-speed camera is installed on the L-shaped load plate, and the programmable control console controls the L-shaped load plate to drive the high-speed camera to move along with the particles.
2. The particle settling flow field measurement and control device of claim 1, wherein: the middle of the particle release frame is provided with a sliding groove, and the upper part of the power-losing type electromagnet is slidably arranged on the sliding groove through a screw; the power-off electromagnet comprises a conductive coil, a soft magnetic iron core and a cylindrical permanent magnet; the soft magnetic iron core is sleeved on the cylindrical permanent magnet, the conductive coil is wound outside the soft magnetic iron core, and the magnetic pole generated by electrifying the conductive coil is opposite to the magnetic pole of the cylindrical permanent magnet.
3. The particle settling flow field measurement and control device of claim 2, wherein: the power-losing type electromagnet is connected with a programmable console through a lead, the programmable console provides a direct current power supply to drive the power-losing type electromagnet, and a rectifier diode and a variable resistor are further arranged in a circuit; the variable resistor is used for adjusting voltage and current and adjusting the size of the de-energized electromagnetic iron, and the rectifier diode is a passage when the power supply is switched on.
4. The particle settling flow field measurement and control device of claim 1, wherein: the height of the electric slide rail is greater than that of the top end of the sedimentation barrel, and the upper end and the lower end of the electric slide rail are respectively provided with a limiter.
5. The particle settling flow field measurement and control device of claim 1, wherein: the electric sliding rail is provided with a travel switch, the travel switch is used for controlling the on-off of the power-off type electromagnet circuit, the L-shaped load plate moves downwards to contact and press the rotating arm of the travel switch to rotate, so that the circuit is switched on, and particles are released.
6. The particle settling flow field measurement and control device of claim 1, wherein: the two lasers are surface light sources, and surface lasers emitted by the two lasers are coplanar and are on the plane where the particles move.
7. Use of a particle sedimentation flow field measurement and control apparatus according to any one of claims 1 to 6, characterised by the steps of:
the method comprises the following steps: the positions of the power-off electromagnets are adjusted through the sliding grooves in the particle release frame, and particles are respectively adsorbed on the power-off electromagnets;
step two: fixing a high-speed camera to enable the visual field of the high-speed camera to be a part of a sedimentation barrel, manually controlling particle sedimentation, obtaining the sedimentation speed of particles by analyzing particle tracks, and inputting speed information into a programmable control console;
step three: adjusting the position of the travel switch on the electric slide rail to enable particles to be positioned in the center of the visual field of the high-speed camera when the travel switch is triggered by the L-shaped load plate;
step four: the programmable control console controls the motor to start, the L-shaped load plate moves to trigger the travel switch, the direct-current power supply energizes the power-off type electromagnet, so that the particles are released, the high-speed camera and the particles fall synchronously, and the particles are always in the center of the field of view of the high-speed camera;
step five: and (3) superposing the motion velocity vector of the camera and the motion vector field of the fluid around the particles in the whole process of particle sedimentation through the post-processing of the particle image velocimetry technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111490071.0A CN114166467A (en) | 2021-12-08 | 2021-12-08 | Particle sedimentation flow field measurement and control device and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111490071.0A CN114166467A (en) | 2021-12-08 | 2021-12-08 | Particle sedimentation flow field measurement and control device and use method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114166467A true CN114166467A (en) | 2022-03-11 |
Family
ID=80484248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111490071.0A Pending CN114166467A (en) | 2021-12-08 | 2021-12-08 | Particle sedimentation flow field measurement and control device and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114166467A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494869A (en) * | 2011-12-27 | 2012-06-13 | 东南大学 | Measuring device of dense two-phase flow particle speed and concentration spatial distribution |
| CN108007669A (en) * | 2017-11-10 | 2018-05-08 | 哈尔滨工程大学 | A kind of device of real-time tracing ascending gas bubbles dynamic characteristic and Field Characteristics |
| CN208653979U (en) * | 2018-11-06 | 2019-03-26 | 河海大学 | The device of particle synchronous release in a kind of particle sedimentation experiment |
| CN109612682A (en) * | 2018-12-24 | 2019-04-12 | 上海理工大学 | A kind of jet stream movement measuring device in scaled model based on PIV |
-
2021
- 2021-12-08 CN CN202111490071.0A patent/CN114166467A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494869A (en) * | 2011-12-27 | 2012-06-13 | 东南大学 | Measuring device of dense two-phase flow particle speed and concentration spatial distribution |
| CN108007669A (en) * | 2017-11-10 | 2018-05-08 | 哈尔滨工程大学 | A kind of device of real-time tracing ascending gas bubbles dynamic characteristic and Field Characteristics |
| CN208653979U (en) * | 2018-11-06 | 2019-03-26 | 河海大学 | The device of particle synchronous release in a kind of particle sedimentation experiment |
| CN109612682A (en) * | 2018-12-24 | 2019-04-12 | 上海理工大学 | A kind of jet stream movement measuring device in scaled model based on PIV |
Non-Patent Citations (1)
| Title |
|---|
| 王波兰等: "PIV技术在复杂二相流场中的应用", 《实验流体力学》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110232853A (en) | A kind of magnetic fluid drop deformation and segregation phenomenon observation experiment system and test method | |
| CN207456985U (en) | Steel ball pinpoints falling machine | |
| JPWO2017104662A1 (en) | Particle analyzer and particle analysis method | |
| CN104966440A (en) | Physical experiment device for demonstrating two-dimensional motion | |
| CN114166467A (en) | Particle sedimentation flow field measurement and control device and use method thereof | |
| CN103698197A (en) | Single-ion-beam irradiation operating device for optical tweezers | |
| CN107543830B (en) | Detection device and detection method for surface defects of spherical optical element | |
| Li et al. | A homemade atomic force microscope based on a quartz tuning fork for undergraduate instruction | |
| CN108593254B (en) | Device for tracking and measuring particle track and eddy current strength based on PIV technology | |
| CN201522265U (en) | VCM magnetic steel vision detecting system | |
| CN204988178U (en) | Image measuring apparatus | |
| CN105783795A (en) | Measuring device for flatness of polishing plastic disc of large ring polishing machine, and measuring method thereof | |
| CN112556676B (en) | Device for adjusting motion parameters of atomic fountain | |
| CN208383085U (en) | A kind of light source diverging angle automatic detecting device | |
| CN107543824B (en) | Device and method for detecting surface defects of planar optical element | |
| CN103606322B (en) | Two dimension magnetic suspension dynamics experiment instrument | |
| CN205140924U (en) | Quick positioner of scanning electron microscope sample microdomain | |
| CN202471629U (en) | Sample rack | |
| CN113406071A (en) | Magnetic drive liquid drop motion testing device and testing method thereof | |
| CN112068302A (en) | Pathological section microscopic detection device capable of reducing pollution | |
| CN208270485U (en) | A kind of local magnetized device | |
| CN203631018U (en) | Two-dimensional magnetic suspension dynamics experiment instrument | |
| CN208012539U (en) | A kind of precision rotating body diameter of part automatic measuring instrument | |
| CN115354389B (en) | Pre-centering device for crucible driving shaft of crystal growth furnace and control method thereof | |
| CN104821120A (en) | Gravitational acceleration measuring method and device thereof |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220311 |