CN215770540U - Rod bundle channel gas-liquid two-phase flow refinement measurement experiment body device - Google Patents
Rod bundle channel gas-liquid two-phase flow refinement measurement experiment body device Download PDFInfo
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- CN215770540U CN215770540U CN202022871277.5U CN202022871277U CN215770540U CN 215770540 U CN215770540 U CN 215770540U CN 202022871277 U CN202022871277 U CN 202022871277U CN 215770540 U CN215770540 U CN 215770540U
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- 238000005259 measurement Methods 0.000 title claims abstract description 34
- 239000007788 liquid Substances 0.000 title claims abstract description 31
- 230000005514 two-phase flow Effects 0.000 title claims abstract description 27
- 238000002474 experimental method Methods 0.000 title claims description 16
- 239000000523 sample Substances 0.000 claims abstract description 37
- 230000000007 visual effect Effects 0.000 claims abstract description 26
- 238000002156 mixing Methods 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000446 fuel Substances 0.000 claims abstract description 18
- 239000000919 ceramic Substances 0.000 claims abstract description 15
- 239000012982 microporous membrane Substances 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 3
- 238000012800 visualization Methods 0.000 abstract description 20
- 125000006850 spacer group Chemical group 0.000 abstract description 8
- 238000003756 stirring Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 2
- 239000012071 phase Substances 0.000 description 11
- 239000012528 membrane Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000012805 post-processing Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 238000000691 measurement method Methods 0.000 description 3
- 238000000917 particle-image velocimetry Methods 0.000 description 3
- 230000005501 phase interface Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
Abstract
本实用新型提供一种棒束通道气液两相流精细化测量实验本体装置，包括可视化筒体和进气入口，可视化筒体顶端表面为横向可视化拍摄，侧面表面为纵向可视化拍摄面；可视化筒体包括排气孔、可视化上封头、窄矩形探针测量端口、可视化下封头、带搅混翼定位格架和模拟棒束燃料元件，带搅混翼定位格架设置在可视化筒体内部，模拟棒束燃料元件经带搅混翼定位格架通过固定孔板固定；所述进气入口包括主进水管、辅助进水通道、进气通道、陶瓷微孔模管和气液混合室，主进水管与可视化筒体下端连接，主进水管的侧端和进气通道分别与气液混合室左右两端连接，进气通道上套有陶瓷微孔模管。本实用新型结构紧凑、安装方便、测量灵活且精确度高、应用范围广泛。
The utility model provides an experimental body device for the fine measurement of gas-liquid two-phase flow in a rod bundle channel, which comprises a visualization cylinder and an air inlet. The body includes a vent hole, a visualization upper head, a narrow rectangular probe measurement port, a visualization lower head, a spacer with stirring wings, and a simulated bundle of fuel elements. The spacer with stirring wings is set inside the visualization cylinder to simulate The rod bundle fuel element is fixed by the fixed orifice plate through the spacer with stirring wings; the air inlet includes a main water inlet pipe, an auxiliary water inlet channel, an air inlet channel, a ceramic microporous mold tube and a gas-liquid mixing chamber. The lower end of the visual cylinder is connected, the side end of the main water inlet pipe and the air inlet channel are respectively connected with the left and right ends of the gas-liquid mixing chamber, and the air inlet channel is covered with a ceramic microporous mold tube. The utility model has the advantages of compact structure, convenient installation, flexible measurement, high precision and wide application range.
Description
Technical Field
The utility model relates to the technical field of nuclear reactor thermal hydraulic technology, in particular to a rod beam channel gas-liquid two-phase flow fine measurement experiment body device.
Background
The performance and safety of the fuel are determined by the supercooling boiling of the advanced fuel in normal operation of the reactor and the thermal hydraulic characteristics of the two-phase flow under the accident condition. The development of rod bundle channel gas-liquid two-phase flow parameter fine measurement including phase interface concentration, void fraction, bubble size, flow field speed, turbulence intensity and the like and the study of the transport characteristics of the rod bundle channel gas-liquid two-phase flow parameter fine measurement are important foundations of a two-phase flow heat exchange mechanism and the study of interphase resistance, are key contents of the design of an advanced fuel assembly, and have important significance for improving the safety of a reactor and reducing accident risks. The traditional research method still cannot realize full-channel and synchronous fine measurement of gas-liquid two-phase flow parameters due to the defects of the design of an experimental body and the measurement method. For example, the conductance probe method can only realize the measurement of gas phase parameters in a certain linear sub-channel, and even if only the gas phase parameters are aimed at, the conductance probe method cannot be practically applied to the fine measurement of the whole channel. The wire electrode measurement method measures two-phase flow bubble parameter information of a certain cross section through a multilayer wire electrode orthogonal locus, but because the rod bundle channel gap is narrow and the visual body is relatively fragile, when gas phase parameter measurement of the variable-height cross section is carried out, a plurality of array holes need to be formed in adjacent positions around the experiment body, the firmness and reliability of the experiment body are reduced, and meanwhile, the processing and installation are very inconvenient. Therefore, in order to develop a wider, more comprehensive and more accurate mechanism research on the parameter transportation of the gas-liquid two-phase flow in the rod bundle channel, it is necessary to design an experiment body capable of performing real-time, dynamic and continuous synchronous fine measurement on the gas-liquid two-phase flow parameters of the rod bundle channel.
Disclosure of Invention
The utility model aims to provide a rod bundle channel gas-liquid two-phase flow fine measurement experiment body device which can realize the independent measurement and synchronous measurement of each phase parameter of the gas-liquid two-phase flow under the conditions of multiple working conditions and different gas flow rates in a narrow space of a rod bundle channel.
The purpose of the utility model is realized as follows:
a rod bundle channel gas-liquid two-phase flow refined measurement experiment body device comprises a visualization cylinder 14 and an air inlet, wherein the top end surface of the visualization cylinder 14 is a transverse visualization shooting surface 2, the side surface of the visualization cylinder is a longitudinal visualization shooting surface 5, a guide rail 21 capable of moving in two dimensions is arranged on the transverse visualization shooting surface 2, and four probe conductance probes 20 arranged in a square shape are arranged on the guide rail 21 capable of moving in two dimensions; the visualization cylinder 14 comprises an exhaust hole 1, a visualization upper end enclosure 3, a narrow rectangular probe measurement port 6, a visualization lower end enclosure 7, a positioning grid 12 with mixing wings and a simulation rod bundle fuel element 13, wherein the positioning grid 12 with mixing wings is arranged inside the visualization cylinder 14, the simulation rod bundle fuel element 13 is fixed through the positioning grid 12 with mixing wings by a fixed orifice plate 19, the upper end and the lower end of the simulation rod bundle fuel element 13 are respectively connected with the visualization upper end enclosure 3 and the visualization lower end enclosure 7, and the narrow rectangular probe measurement port 6 is arranged on the longitudinal visualization shooting surface 5; the inlet port includes main inlet tube 8, supplementary inlet channel 9, inlet channel 10, pottery micropore mould pipe 11 and gas-liquid mixing chamber 15, and main inlet tube 8 is connected with visual barrel 14 lower extreme, and main inlet tube 8's side and inlet channel 10 are connected with both ends about gas-liquid mixing chamber 15 respectively, and supplementary inlet channel 9 sets up at 15 lower extremes of gas-liquid mixing chamber, and the cover has pottery micropore mould pipe 11 on the inlet channel 10.
The utility model also includes such structural features:
1. the auxiliary water inlet channel 9 is vertical to the air inlet channel 10, and the auxiliary water inlet channel 9 is positioned on the left side of the ceramic microporous die tube 11.
2. The aperture of the ceramic microporous membrane tube 11 is 10um, and the rightmost end of the ceramic microporous membrane tube 11 is closed and is a solid end face.
3. The visual cylinder 14 is a square channel with a smooth inner wall.
4. The fastening screws 16 and the fixing screws 18 are fixed to the top and bottom ends of the dummy rod bundle fuel elements 13, respectively.
5. The simulated bundle fuel elements 13 are arranged in a 5 x 5 array.
6. The four-probe conductance probe 20 in the square arrangement is a retractable conductance probe.
Compared with the prior art, the utility model has the beneficial effects that:
1. the ceramic microporous membrane tube with a specific aperture and an advanced manufacturing process is used as a bubble generating device, and the size of generated bubbles can be controlled by controlling the air inlet flow;
2. the pipe diameter, the layout and the function positioning of the main water inlet pipeline, the auxiliary water inlet pipeline and the outlet of the gas-liquid mixing chamber are more reasonable, and different gas-containing rate flow patterns under different working conditions can be obtained;
3. the narrow rectangular probe measuring port is only arranged on one surface of the cylinder, so that the full-field fine measurement task of the two-dimensional miniature conductance probe on gas phase parameters can be met, the reliability of the experiment body is not influenced, and the interference degree on a flow field is small;
4. the design positions of the narrow rectangular measurement ports are respectively positioned at the upper stream and the lower stream of the positioning grid, so that the task requirements of measuring the two-phase flow of the sub-channel and the full channel under the conditions of whether the positioning grid is provided with the mixing wings, different sizes of the mixing wings, different bending angles, different arrangement schemes and the like can be met;
5. the telescopic square four-probe conductance probe has high effective bubble ratio and higher measurement precision;
6. the refractive index matching technology and the polishing and filtering technology adopted by the two-phase particle image velocimetry technology can filter out wave light information of a bubble phase interface, weaken the influence of bubbles on light and realize multi-surface visual measurement of a liquid phase flow field;
7. the device can realize the independent measurement and synchronous measurement of gas phase and liquid phase in gas-liquid two-phase flow, has wide experimental application range, and has high fidelity characteristic of measured data.
Drawings
FIG. 1 is an overall schematic view of the present invention;
FIG. 2 is a schematic view of an inlet structure capable of controlling the size and type of bubbles according to the present invention;
FIG. 3 is a right side view of a test section of the present invention;
FIG. 4 is a simplified diagram of a four-probe conductance probe measurement technique and its cross-sectional measurable sites in accordance with the present invention;
FIG. 5 is a schematic diagram of a two-phase particle image velocimetry technique in accordance with the present invention;
Detailed Description
The utility model will now be described in further detail by way of example with reference to the accompanying drawings in which:
as shown in fig. 1, in the experiment process, the air inlet pipe 10 is first closed, the auxiliary water inlet pipe 9 and the main water inlet pipe 8 jointly deliver the water supply flow, and the air in the experiment body is discharged through the air outlet 1. After water filling and air exhausting, the filtered and compressed gas is led to a ceramic microporous membrane tube 11 through an air inlet pipeline 10, the gas can undergo cutting and splitting processes in the membrane tube, micropores in the membrane are gradually opened along with the rise of the gas pressure, the gas finally escapes to the outer surface of the membrane tube and is separated from the membrane tube under the action of auxiliary water supply shearing force, and bubbles are generated. The change of the water supply flow in the main water inlet pipeline 8 can obtain flow patterns with different working conditions and different gas contents, and the flow patterns are suddenly contracted and suddenly expanded pipes, so that the uniform distribution of bubbles after the working medium flows out of the suddenly expanded pipes and enters the visual lower end socket 7 is facilitated. The distance between the main water inlet pipeline 8 and the first fixed orifice plate is longer, so that a fully developed section of two-phase flow is formed, and the uniform distribution of bubbles among all sub-channels at the test section after passing through the orifice plate is ensured. After passing through the spacer grid 12 with the mixing wings, the flow field and the bubble distribution change, so as to carry out the distribution characteristic research of the flow pattern parameters after mixing and disturbance through the spacer grid with the mixing wings. Finally, the working medium flows out from the two-phase flow outlet 4 of the visual upper end enclosure 3 after flowing through the body. The two-phase flow field information in the rod beam channel can be obtained through the visualization cylinder 14 at any height of the longitudinal section and any sub-channel through a two-phase particle image velocimetry technology, and the visualization cylinder 14 is a square channel with a smooth inner wall. Through the horizontal visual shooting surface 2, any cross section flow field information can be obtained, and single-channel, multi-channel and full-field liquid phase parameter measurement can be realized by adjusting the focal length of the camera.
As shown in fig. 2, the auxiliary water inlet pipe 9 is perpendicular to the air inlet pipe 10 and is located on the left side of the ceramic microporous membrane tube 11, so that the auxiliary water is ensured to impact the inner wall of the mixing chamber first, the stirring and shearing forces are enhanced, and the bubble generation rate is increased. The control of the size of the generated bubbles is achieved by controlling the pumping flow of compressed air in the inlet duct 10. The gas-liquid mixing chamber 15 is made of a fully transparent organic glass material and is in a hollow square shape, the bottom of the gas-liquid mixing chamber is provided with a detachable fixed orifice plate matched with the bottom of the gas-liquid mixing chamber, the aperture of the ceramic microporous membrane tube 11 is 10 mu m, and the rightmost end of the ceramic microporous membrane tube 11 is closed and is a solid end face. The membrane tube is advanced in manufacturing process and low in price, bubbles with required sizes can be obtained by controlling the air inflow, the size of generated bubbles is 1-3mm, the membrane tube is convenient to replace and integrally install, the size of generated bubbles can be conveniently observed, and the membrane tube has the advantages of being light in weight, low in cost, convenient to install and disassemble and the like. By controlling the water supply flow in the main water inlet pipeline 8, flow pattern structures with different working conditions and different gas contents can be obtained.
As shown in fig. 3, the simulated fuel element 13 is fixed by the fixing orifice plate 19 and the spacer grid 12 with the blending wings and then positioned inside the cylinder 14, and is connected with the visual upper head 3 and the visual lower head 7 by the fastening screw 16 and the fixing screw 18, respectively, and the rods are kept horizontal and straightened, so as to ensure that the simulated fuel element 13 is not vibrated or damaged under the action of the flow field. The two narrow rectangular probe measurement ports 6 are respectively positioned at the upper and lower reaches of the spacer grid 12 with the stirring wings, so that whether the spacer grid is provided with the stirring wings or not can be measured, and the gas phase parameters of two-phase flow in the rod bundle channel can be measured under the conditions of different sizes of the stirring wings, different bending angles, different arrangement schemes and the like.
As shown in fig. 4, the system comprises a simulation bundle fuel element 13, a visualization cylinder 14, a square arrangement of four-probe conductance probes 20, a two-dimensionally movable guide rail 21, an information acquisition and post-processing module, a cross-sectional flow field 22, and a probe measurable site 23. The simulated rod bundle fuel elements 13 are arranged in a 5 multiplied by 5 array, a guide rail 21 capable of moving in two dimensions is arranged on the transverse visual shooting surface 2, a four-probe conductance probe 20 arranged in a square shape is arranged on the guide rail 21 capable of moving in two dimensions, and a four-probe conductance probe arranged in a square shape is arranged on the guide rail 21 in a four-probe conductance modeThe probe 20 is a telescopic conductive probe, the minimum tip size of the probe is 50um, and the cross-sectional area of the probe is 0.04mm2The conductance probe 20 can accurately position measurable sites in the rod bundle channel under the fine adjustment of the guide rail 21, the measurable sites are distributed in a flow field area, the fine measurement of gas phase parameters of any sub-channel can be realized, and measured data are collected and then sent to a post-processing module for analysis and calculation.
As shown in fig. 5, includes fluorescent tracer particles 24, bubbles 25, Nd-YAG laser 26, 585nm filter 27, high-speed camera 28, and image post-processing tiles. After the fluorescent tracing particles 24 are scattered in a flow field, the fluorescent tracing particles are excited under the irradiation of Nd-YAG laser 26, fluorescence with the wavelength of 585nm is emitted, 532nm wave light information at a bubble phase interface is filtered by a 585nm optical filter 27, the fluorescent particle information is finally collected through a high-speed camera 28, and the information is post-processed by an image post-processing plate, so that high-fidelity continuous liquid phase velocity field information is obtained.
Claims (6)
1. A rod bundle channel gas-liquid two-phase flow fine measurement experiment body device is characterized in that: the device comprises a visual barrel (14) and an air inlet, wherein the top surface of the visual barrel (14) is a transverse visual shooting surface (2), the side surface of the visual barrel is a longitudinal visual shooting surface (5), a guide rail (21) capable of moving in two dimensions is arranged on the transverse visual shooting surface (2), and four-probe conductance probes (20) arranged in a square shape are arranged on the guide rail (21) capable of moving in two dimensions; the visual barrel (14) comprises an exhaust hole (1), a visual upper end enclosure (3), a narrow rectangular probe measuring port (6), a visual lower end enclosure (7), a positioning grid frame (12) with mixing wings and a simulated rod bundle fuel element (13), wherein the positioning grid frame (12) with mixing wings is arranged inside the visual barrel (14), the simulated rod bundle fuel element (13) is fixed through the positioning grid frame (12) with mixing wings by a fixed orifice plate (19), the upper end and the lower end of the simulated rod bundle fuel element (13) are respectively connected with the visual upper end enclosure (3) and the visual lower end enclosure (7), and the narrow rectangular probe measuring port (6) is arranged on the longitudinal visual shooting surface (5); the inlet includes main inlet tube (8), supplementary inlet channel (9), inlet channel (10), ceramic microporous membrane pipe (11) and gas-liquid mixing chamber (15), and main inlet tube (8) are connected with visual barrel (14) lower extreme, and both ends are connected about side and inlet channel (10) of main inlet tube (8) respectively with gas-liquid mixing chamber (15), and supplementary inlet channel (9) set up at gas-liquid mixing chamber (15) lower extreme, and the cover has ceramic microporous membrane pipe (11) on inlet channel (10).
2. The rod bundle channel gas-liquid two-phase flow fine measurement experiment body device according to claim 1, which is characterized in that: the auxiliary water inlet channel (9) is vertical to the air inlet channel (10), and the auxiliary water inlet channel (9) is positioned on the left side of the ceramic microporous membrane tube (11).
3. The device of the experimental body for the fine measurement of the gas-liquid two-phase flow of the rod beam channel according to claim 1 or 2, wherein: the aperture of the ceramic microporous membrane tube (11) is 10um, and the rightmost end of the ceramic microporous membrane tube (11) is closed and is a solid end face.
4. The rod bundle channel gas-liquid two-phase flow fine measurement experiment body device according to claim 1, which is characterized in that: the visual cylinder (14) is a square channel with a smooth inner wall.
5. The rod bundle channel gas-liquid two-phase flow fine measurement experiment body device according to claim 1, which is characterized in that: the simulated bundle fuel elements (13) are arranged in a 5 x 5 array.
6. The rod bundle channel gas-liquid two-phase flow fine measurement experiment body device according to claim 1, which is characterized in that: the four-probe conductance probe (20) arranged in a square shape is a telescopic conductance probe.
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| CN202022871277.5U CN215770540U (en) | 2020-12-02 | 2020-12-02 | Rod bundle channel gas-liquid two-phase flow refinement measurement experiment body device |
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| CN202022871277.5U CN215770540U (en) | 2020-12-02 | 2020-12-02 | Rod bundle channel gas-liquid two-phase flow refinement measurement experiment body device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115078222A (en) * | 2022-07-07 | 2022-09-20 | 西安石油大学 | An imbibition physical simulation experiment device and method considering seam end pressure difference |
| CN115910401A (en) * | 2022-11-07 | 2023-04-04 | 中国核动力研究设计院 | Visualization device, system and method for simulating downstream two-phase flow field mixing effect |
-
2020
- 2020-12-02 CN CN202022871277.5U patent/CN215770540U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115078222A (en) * | 2022-07-07 | 2022-09-20 | 西安石油大学 | An imbibition physical simulation experiment device and method considering seam end pressure difference |
| CN115078222B (en) * | 2022-07-07 | 2023-10-27 | 西安石油大学 | An imbibition physical simulation experimental device and method considering seam end pressure difference |
| CN115910401A (en) * | 2022-11-07 | 2023-04-04 | 中国核动力研究设计院 | Visualization device, system and method for simulating downstream two-phase flow field mixing effect |
| CN115910401B (en) * | 2022-11-07 | 2023-09-05 | 中国核动力研究设计院 | Visualization device, system and method for simulating downstream two-phase flow field mixing effect |
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