CN208420754U - A kind of experimental provision of gas-solid two-phase shock tube flash X-ray imaging - Google Patents
A kind of experimental provision of gas-solid two-phase shock tube flash X-ray imaging Download PDFInfo
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- CN208420754U CN208420754U CN201821167143.1U CN201821167143U CN208420754U CN 208420754 U CN208420754 U CN 208420754U CN 201821167143 U CN201821167143 U CN 201821167143U CN 208420754 U CN208420754 U CN 208420754U
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Abstract
The utility model discloses a kind of experimental provisions of gas-solid two-phase shock tube flash X-ray imaging.Particle discharges collecting mechanism mounted in observation section, and flash X-ray imaging system sets the side around observation section；Particle storage room, gate valve and particle collecting cells are sequentially arranged up and down, and X-ray emitter emits flash X-ray towards observation section, are received through after observation section two sides aluminum window by X-ray detector；The solids medium gravity fall for discharging particle storage room generates particle curtain in observation section, and shock wave is got in shock tube and particle curtain interacts, dense particles field data at acquisition and recording shock wave and particle curtain interaction.The utility model realizes the capture of particle curtain dynamic shock wave structure, is penetrated using flash X-ray to observation section particle curtain, provides new effective means to the detail analyzed and observation particle curtain changes.
Description
Technical field
The utility model relates to a kind of shock tube experiment devices, glisten more particularly, to a kind of gas-solid two-phase shock tube
The experimental provision of x-ray imaging.
Background technique
The explosive dispersion of particle is present in various engineering problems, is included in non-homogeneous explosion, wherein solid
Particle is initially mixed with explosive substance.In early stage load stream, solid phase particles are in the gas-solid flow with advanced dynamic
Dense distribution in dynamic.Although making moderate progress in the past few years to the understanding of compressible dense gas-solid flow, more to particle transport
Good understanding needs the data in dense Particle Field, these Particle Fields are usually optically opaque to the method for using visible light
, this causes to obtain when analyzing and observing dense Particle Field preferable as a result, existing experimental technique is difficult to solve simultaneously
The experimental observation problem of particle shock wave structure.
Utility model content
Aiming at the problem that in the presence of above-mentioned background technique, the purpose of this utility model is to provide a kind of gas-particle two-phases
The experimental provision of shock tube flash X-ray imaging has carried out the capture of particle curtain dynamic shock wave structure, is compressible dense gas-solid two
Phase stream provides a kind of experimental provision of unique flow field characteristic measurement.
The utility model solve its technical problem the technical solution adopted is that:
Device includes that multiphase shock tube, flash X-ray imaging system and particle release collecting mechanism, multiphase shock tube include
Drive section, by drive section and observation section, particle release collecting mechanism be mounted on observation section, flash X-ray imaging system is arranged in
Observe side around section；Particle release collecting mechanism includes that the particle storage room being sequentially arranged from top to bottom, gate valve and particle are received
Collect room, particle storage room lower ending opening is connected with gate valve upper end, and gate valve lower end is communicated to the top of observation section through pipeline section, observes section
Bottom end connect particle collecting cells, particle collecting cells are located at particle storage room underface；Particle storage room is provided with particle media,
It opens gate valve particle media to fall from particle storage room, forms particle curtain in observation section in dropping process, eventually fall in particle
In collecting chamber；Flash X-ray imaging system includes X-ray emitter, X-ray detector and high-speed camera；Observe section two sides
Side is provided with through slot, is equipped with aluminum window at through slot, and X-ray emitter is arranged in the aluminum window side of observation section wherein side, X-ray
Detector and high-speed camera are arranged in the aluminum window side of the observation section other side, and X-ray emitter is connected to X-ray detector；X
Ray emitter towards observation section emit flash X-ray, through observation section two sides aluminum window after by the positive spy of X-ray detector
It surveys end to receive, high-speed camera camera lens acquires image towards the X-ray detector back side.
The drive section is mainly made of about 100 millimeters of diameter of round tube, is mainly 89 millimeters by side length by drive section
Square tube be made, by driving gas original state be room temperature, atmospheric environmental pressure in multiphase shock tube, test executable shock wave
Range of Mach numbers is 1.1-2.4.
The flash X-ray of the X-ray emitter towards observation section transmitting is directed at aluminum window center and perpendicular to aluminum window table
Face.
Initial particle curtain is located at side of the center line of flash X-ray in the shock propagation upstream in observation section, grain
Angle between the center of sub- curtain and the line at X-ray emitter transmitting probe center and the center line of flash X-ray is 1 degree.
Shock wave is generated by way of bursting diaphragm explosion in the multiphase shock tube.
Although making moderate progress in the past few years to the understanding of compressible dense gas-solid flow, particle transport is best understood from
The data in dense particles field are needed, these Particle Fields are usually optically opaque to the method for using visible light.And
The utility model can penetrate fine and close Particle Field using flash X-ray imaging, and flash X-ray source is capable of providing persistently tens of receive
The strong light beam of second is substantially flowed with measuring similar mode " freezing " with the laser diagnostics in fluid experiment, this makes
Advantage is occupied in shock tube experiment.
The X-ray emitter of the utility model is capable of providing single flash operation as flash X-ray source and continues few tens of nano-seconds
Strong light beam substantially measures similar mode " freezing " flowing, to measurement dense particles with the laser diagnostics in fluid experiment
Data in provide new means.
The advantageous effects that the utility model has are:
The utility model penetrates observation section particle curtain using flash X-ray, in conjunction with X-ray detector and high-speed photography
The variation of particle curtain is captured when instrument interacts to shock wave with dense particle curtain, realizes particle curtain dynamic shock wave structure
Capture provides new effective means to the detail analyzed and observation particle curtain changes.
Detailed description of the invention
Fig. 1 is multiphase shock tube schematic diagram.
Fig. 2 is the experimental provision structural schematic diagram of the utility model.
Fig. 3 is the top view that Fig. 2 observes Duan Zhongyu flash of light X imaging system.
Fig. 4 is the structural schematic diagram for obtaining mass attentuation coefficient in embodiment using 15 layers of sheet glass arrangement.
In figure: 1, X-ray emitter, 2, square tube flange, 3, aluminum window, 4, particle collecting cells, 5, square tube flange, 6, X-ray
Detector, 7, gate valve, 8, particle storage room, 9, high-speed motion picture camera, 10, particle curtain, 11, sheet glass.
Specific embodiment
The utility model is described further with example with reference to the accompanying drawing.
The device of specific implementation includes multiphase shock tube, flash X-ray imaging system 1,6,9 and particle release collection machine
Structure, as shown in Figure 1, multiphase shock tube includes drive section, by drive section and observation section.As shown in Fig. 2, particle discharges collecting mechanism
It is mounted on observation section, flash X-ray imaging system 1,6,9 is arranged in side around observation section.
As shown in Fig. 2, particle release collecting mechanism includes successively storing up from top to bottom along same particle arranged in a vertical direction
Room 8, gate valve 7 and particle collecting cells 4 are deposited, 8 lower ending opening of particle storage room is connected with 7 upper end of gate valve, and 7 lower end of gate valve connects through pipeline section
The bottom end connection particle collecting cells 4 of section are observed, under particle collecting cells 4 are located at particle storage room 8 just in the top for leading to observation section
Side；Particle storage room 8 is provided with particle media, opens 7 particle media of gate valve and falls from particle storage room 8, in dropping process
It observes and forms particle curtain 10 in section, eventually fall in particle collecting cells 4.
As shown in Figures 2 and 3, flash X-ray imaging system 1,6,9 includes X-ray emitter 1,6 and of X-ray detector
High-speed camera 9；Observation section two sides side is provided with through slot, aluminum window 3 is equipped at through slot, X-ray emitter 1 is arranged in observation section
Wherein 3 side of aluminum window of side, X-ray detector 6 and high-speed camera 9 are arranged in 3 side of aluminum window of the observation section other side, X
Ray emitter 1 is connected to X-ray detector 6；X-ray emitter 1 emits flash X-ray towards observation section, through observation section
It is received after the aluminum window 3 of two sides by the positive end of probe of X-ray detector 6,9 camera lens of high-speed camera is carried on the back towards X-ray detector 6
Face acquires image.
The both ends of observation section are equipped with square tube flange 2 and square tube flange 5, so that the both ends of observation section pass through square tube flange
5 connections are by drive section and outlet section.
The flash X-ray of X-ray emitter 1 towards observation section transmitting is directed at 3 center of aluminum window and perpendicular to 3 table of aluminum window
Face.
Drive section is mainly made of about 100 millimeters of diameter of round tube, the square tube for being mainly 89 millimeters by side length by drive section
It is made, by driving gas original state is room temperature, atmospheric environmental pressure in multiphase shock tube, tests executable shock mach number
Range is 1.1-2.4.In specific implementation, aluminum window 3 with a thickness of 10mm.X-ray detector 6 is big at a distance from part of detecting center
About 8cm is remote, such as IOD long in Fig. 2.X-ray emitter 1 is about 136cm remote at a distance from part of detecting center, such as SOD in Fig. 2
It is long.
Initial particle curtain 10 is located at the side of center line shock propagation upstream in being in observation section of flash X-ray,
Folder between the line at 1 transmitting probe center of streamline center and X-ray emitter and the center line of flash X-ray of particle curtain 10
Angle is 1 degree, so that particle curtain 10 is downstream recorded in communication process in the case where shock wave pushes.
In specific implementation, as shown in Fig. 2, establishing three-dimensional cartesian coordinate system, X-axis is parallel to observation section shock propagation direction, Z
Axis is parallel to the flash X-ray direction that X-ray emitter 1 is emitted, and Y direction is parallel under the particle in particle storage room 8
Fall direction.
The embodiments of the present invention and its specific implementation course of work are as follows:
The solids medium of particle storage room 8 is discharged by gate valve 7, particle media is using diameter made of calcium soda-lime glass
For 100 microns of calcium sodium ball solid, particle media generates particle curtain 10 by gravity fall in observation section, in multiphase shock tube
Shock wave is generated by way of bursting diaphragm explosion, in the present embodiment, the shock mach number used is 1.6.
It interacts with particle curtain 10, it is mutual using 1,6,9 acquisition and recording shock wave of flash X-ray imaging system and particle curtain
Make the dense particles field data of use.
In specific implementation, it is imaged in observation section using 6 pairs of incident flash X-rays of X-ray detector, X-ray inspection
It surveys device and part of detecting side wall is connected to the distance remote away from part of detecting center about 8cm.The sensor is dodged using gadolinium oxide
X-ray photon is converted visible photon by bright device, these photons are captured with high-speed photography, recycles ten million network interface card that will take the photograph at a high speed
Shadow is attached with computer, so that computer capacity controls it, transmitting capture, triggering and the setting of other running parameters
Order after high-speed photography receives capture command, starts to acquire continuous video data, and interior inside real-time storage to video camera
In depositing, after being connected to trigger command, video camera stops acquisition video data.It is connect by the RS422 interface of the address card specially designed
The synchronization observing and controlling information that TT&C system sends over is received, memory is read in by pci bus by computer, is stored afterwards through processing
Onto hard disc of computer.
1) particle media do not fall do not generate do not get shock wave in particle curtain and shock tube in the case where, by sheet glass
It is placed in observation section, the mass attentuation coefficient A during interacting from particle curtain under different gray values is obtained by calibrating,
Specifically:
It is 15 thickness are identical, every block of sheet glass with a thickness of 0.96 millimeter, length is from being short to the long glass being sequentially arranged
Piece stacks to form 15 layers of glass, is placed in observation section, particle media does not fall to not generating and not have in particle curtain and shock tube at this time
Shock wave is got, 15 sheets are arranged with length along shock propagation direction, upstream side of 15 sheets in shock propagation
Alignment extends to form length from long arrangement is short in the downstream side of shock propagation, and 15 sheets stacking directions are along flash of light X
Directions of rays emits flash X-ray towards observation section by X-ray emitter 1, and flash X-ray penetrates 15 layers of glass, and penetrates
It is received after the sheet glass of heap poststack different-thickness by X-ray detector 6 and detects 15 different grades of X-ray intensities, 15
The sheet glass of corresponding 15 kinds of different grades of X-ray intensity thickness combination not of the same race, then carries out piecewise fitting to X-ray intensity
Obtain the mass attentuation coefficient A under different gray values.
In embodiment, for piecewise fitting, the mass attentuation coefficient A of acquisition is up to 0.135 or so, and minimum 0.116,
It is similar with by the decaying of step ladder wedge.
2) shock wave and particle that Mach number size is 1.6 are got in particle media whereabouts generation particle curtain 10, shock tube
In the case where 10 interaction of curtain, X-ray emitter 1 emits flash X-ray towards observation section, through the aluminum window of observation section two sides
It is received after 3 by the positive end of probe of X-ray detector 6, is converted to flash X-ray imaging by grid inside X-ray detector 6
The Particle Field digital picture of point close-packed arrays composition is simultaneously presented to display end, and 9 camera lens of high-speed camera is towards X-ray detector 6
The display end at the back side acquires Particle Field digital picture.
3) gray value of mesh point is sought according to Particle Field digital picture, is obtained in shock propagation direction (X-direction) everywhere
Gray value, and then handle obtain particle curtain dynamic shock wave structure.
In specific implementation, the mesh point that Particle Field digital picture is evenly dividing as 20 × 1000, each mesh point according to
Display data can obtain its gray value.The gray value of each column mesh point in Particle Field digital picture is taken into arithmetic mean, as
The gray value at every place on shock propagation direction declines the quality under the different gray values of the gray value combination step 1) acquisition at every place
Subtract the dynamic shock wave structure that coefficient A processing obtains particle curtain.
In specific implementation, the density for the calcium sodium ball that particle media uses is equal to 2.52g/cm3。
Claims (5)
1. a kind of experimental provision of gas-solid two-phase shock tube flash X-ray imaging, it is characterized in that:
Collecting mechanism is discharged including multiphase shock tube, flash X-ray imaging system (1,6,9) and particle, multiphase shock tube includes
Drive section, by drive section and observation section, particle release collecting mechanism be mounted on observation section, flash X-ray imaging system (1,6,9)
It is arranged in side around observation section；It includes the particle storage room (8) being sequentially arranged from top to bottom, gate valve that particle, which discharges collecting mechanism,
(7) it is connected with particle collecting cells (4), particle storage room (8) lower ending opening with gate valve (7) upper end, gate valve (7) lower end connects through pipeline section
The top for leading to observation section, observes bottom end connection particle collecting cells (4) of section, and particle collecting cells (4) are located at particle storage room (8)
Underface；Particle storage room (8) is provided with particle media, opens gate valve (7) particle media and falls from particle storage room (8), under
Particle curtain (10) are formed in observation section during falling, are eventually fallen in particle collecting cells (4)；Flash X-ray imaging system (1,
It 6,9) include X-ray emitter (1), X-ray detector (6) and high-speed camera (9)；Observation section two sides side is provided with through slot,
It is equipped at through slot aluminum window (3), X-ray emitter (1) is arranged in aluminum window (3) side of observation section wherein side, X-ray detection
Device (6) and high-speed camera (9) are arranged in aluminum window (3) side of the observation section other side, and X-ray emitter (1) is connected to X-ray
Detector (6)；X-ray emitter (1) towards observation section emit flash X-ray, through observation section two sides aluminum window (3) after by X
The positive end of probe of ray detector (6) receives, and high-speed camera (9) camera lens is acquired towards X-ray detector (6) back side schemes
Picture.
2. a kind of experimental provision of gas-solid two-phase shock tube flash X-ray imaging according to claim 1, it is characterized in that:
The drive section is mainly made of about 100 millimeters of diameter of round tube, the square tube system for being mainly 89 millimeters by side length by drive section
At by driving gas original state being room temperature, atmospheric environmental pressure in, multiphase shock tube, executable shock mach number model is tested
It encloses for 1.1-2.4.
3. a kind of experimental provision of gas-solid two-phase shock tube flash X-ray imaging according to claim 1, it is characterized in that:
The flash X-ray of the X-ray emitter (1) towards observation section transmitting is directed at aluminum window (3) center and perpendicular to aluminum window (3) table
Face.
4. a kind of experimental provision of gas-solid two-phase shock tube flash X-ray imaging according to claim 1, it is characterized in that:
Initial particle curtain (10) is located at side of the center line of flash X-ray in the shock propagation upstream in observation section, particle curtain
(10) the angle between the line at center and X-ray emitter (1) transmitting probe center and the center line of flash X-ray is 1
Degree.
5. a kind of experimental provision of gas-solid two-phase shock tube flash X-ray imaging according to claim 1, it is characterized in that:
Shock wave is generated by way of bursting diaphragm explosion in the multiphase shock tube.
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| CN201821167143.1U CN208420754U (en) | 2018-07-23 | 2018-07-23 | A kind of experimental provision of gas-solid two-phase shock tube flash X-ray imaging |
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| CN201821167143.1U CN208420754U (en) | 2018-07-23 | 2018-07-23 | A kind of experimental provision of gas-solid two-phase shock tube flash X-ray imaging |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108896587A (en) * | 2018-07-23 | 2018-11-27 | 浙江理工大学 | The experimental provision and experimental method of gas-solid two-phase shock tube flash X-ray imaging |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108896587A (en) * | 2018-07-23 | 2018-11-27 | 浙江理工大学 | The experimental provision and experimental method of gas-solid two-phase shock tube flash X-ray imaging |
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