CN108845005A - Suitable for heating the embedded cavity measuring sensor of plate channel two-phase flow - Google Patents
Suitable for heating the embedded cavity measuring sensor of plate channel two-phase flow Download PDFInfo
- Publication number
- CN108845005A CN108845005A CN201810650361.9A CN201810650361A CN108845005A CN 108845005 A CN108845005 A CN 108845005A CN 201810650361 A CN201810650361 A CN 201810650361A CN 108845005 A CN108845005 A CN 108845005A
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- electrode plate
- measuring sensor
- cavity measuring
- embedded cavity
- measurement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
Abstract
The present invention relates to gas liquid two-phase flow measuring instrument fields in heating plate channel, disclose a kind of embedded cavity measuring sensor, including emission electrode plate, receiving electrode plate and insulating body, described matrix is embedded in fluid pipe walls inner surface, the metallic channel evenly distributed, mutually orthogonal, width is equal is equipped on the surface of described matrix, conductor material is equipped in the metallic channel, the emission electrode plate and receiving electrode plate are mutually 90 degree and are fixedly mounted on the respective wire slot of matrix.The present invention, which is realized, is improved to non-intrusion measurement by intrusive mood measurement for cavity measuring method, measurement result is original information of flow, improves accuracy, goes back modified electrode silk form, is reduced to electrode material intensity requirement, and be not easy to deform very much, use stabilization.
Description
Technical field
The present invention relates to gas liquid two-phase flow measuring instrument field more particularly to a kind of embedded skies in heating plate channel
Steep measurement sensor.
Background technique
Plate channel has application in the numerous areas such as heat exchanger production.In recent years, researcher is logical for plate
Road expands a large amount of basic research, and the research conducted heat to two-phase flow in its channel helps to solve many engineerings and machine
Rationality problem, such as the research of plate channel boiling heat transfer mechanism study, enhanced boiling heat transfer etc..Void fraction, bubble velocity etc.
Parameter is the basis of the studies above.Therefore, the parameters such as the gas phase share of biphase gas and liquid flow and bubble velocity in the type channel
Fast and accurate measurement is an important research topic.
In existing plate channel the method for measurement two-phase flow mainly include visualization measurement, optical fiber probe measurement,
Conductivity probe method, metal grill sensor measurement etc..Wherein, visualization measurement method is to utilize the equipment such as high speed camera, convection current
Field carries out measurement of taking pictures, and then is handled to obtain information of flow to obtained image；Optical fiber probe method utilizes gas phase and liquid phase
It to the difference of the refractive index of light, is analyzed by the reflective light intensity signal different to intensity, to obtain probe fluid nearby
Flow condition；Conductivity probe method is the different influences to fluid conductivity using fluid void fraction, passes through probe convection current
Field measures.
Visualization measurement is transparent visual due to needing runner measured zone, and under high pressure, for structural strength
Reason, runner are not available translucent material manufacture, and therefore, visualization measurement is unable to satisfy the measurement of two-phase flow under condition of high voltage
It needs.In addition, the use of visualization measurement method is also difficult in the case where runner surrounding is heated.
Optical fiber probe method and conductivity probe method to tube wall translucency no requirement (NR), however its measurement be both needed to probe is direct
It is put into flow field and measures.On the one hand, measurement point is only limitted to probe present position, can not carry out to entire flow field comprehensive
Measurement；On the other hand, the presence of probe will make flow field by biggish disturbance, and measurement result can not accurately reflect former flow field
Flowing information, belong to intrusive measurement.
Metal grill sensor, measuring principle is similar with conductivity probe method, that is, utilizes electricity between different void fraction fluids
The difference of conductance.Its simple circuit diagram is as shown in Figure 1, by 101 voltage of sensor emission electrode and reception electricity
The calculating for the size of current that pole 102 receives obtains the conductivity size of measurement point liquid and then is converted to measurement point
Void fraction.Therefore, void fraction sensor can carry out the whether visual no requirement (NR) of runner to high pressure lower flow channel two phase flow signals
Measurement has widely application.
Existing metal grill sensor, common Sensor section structural schematic diagram are as shown in Figures 2 and 3.Metal
Grid sensor consists of two parts, and emission electrode part 204 and receiving electrode part 203, two-part structure is identical, but pacifies
When dress, the two is answered mutually orthogonal, so that emission electrode and receiving electrode form the crosspoint of marshalling, each crosspoint is to survey
Amount point.When measuring fluid void fraction, although emission electrode and to receive electrode itself wire electrode diameter 201 smaller, but still meeting
Original flow field structure is destroyed, belongs to intrusive measurement, it is the non-native information of flow of measurement result, not accurate enough.Metal grill passes
The fixation of each electrode cable of sensor is strained and fixed by corresponding bracket, this electrode fixed form to wire electrode itself
Intensity requirement is higher, to limit the minimum diameter of wire electrode.If furthermore wire electrode self-strength is inadequate, in use process
In, stretcher strain easily occurs for wire electrode, will be no longer parallel to each other between conducting wire, to make measurement point arrangement change, in turn
Cause measurement result that relatively large deviation occurs.And since wire electrode surrounding is surrounded by fluid, own vol is too small, and temperature can recognize
To be identical as fluid temperature (F.T.), also that is, wire electrode temperature easily changes with the variation of fluid temperature (F.T.), it is based on measuring principle, this will make
Measurement result is obtained to deviate, is unstable.
Therefore, those skilled in the art is dedicated to developing a kind of novel void fraction sensor, by measurement method by
Intrusive mood measurement is improved to non-intrusion measurement, existing metal grill sensor intrusive mood measurement, wire electrode is overcome to be easily deformed,
The disadvantage that factors cause measurement result accuracy not high such as influenced by fluid temperature (F.T.).
Summary of the invention
In view of the above drawbacks of the prior art, technical problem to be solved by the invention is to provide a kind of embedded vacuoles
The emission electrode of sensor probe, receiving electrode are embedded in measurement inner surface of tube wall, are surveyed with non-intrusion type by measurement sensor
Amount mode measures measurement two-phase flow in flat rectangular plate channel, improves the accuracy of measurement result.
To achieve the above object, it the present invention provides a kind of embedded cavity measuring sensor, including emission electrode plate, connects
It receives electrode plate and insulating body, described matrix is embedded in fluid pipe walls inner surface, be equipped with uniformly row on the surface of described matrix
Column, metallic channel mutually orthogonal, width is equal are equipped with conductor material, the emission electrode plate and reception in the metallic channel
Electrode plate is mutually 90 degree of sealings and is fixedly mounted on the respective wire slot of matrix.
Further, the measurement inner surface of tube wall is conductor material, and described matrix is laid in measurement inner surface of tube wall.
Further, described matrix with a thickness of 0.1-5mm.
Further, described matrix is high thermal conductivity materials.
Further, the measurement inner surface of tube wall is insulating materials, and described matrix is to measure the part of inner surface of tube wall
Region is laid in measurement inner surface of tube wall.
Further, the width of the metallic channel is less than or equal to 0.1mm.
Further, the emission electrode plate and receiving electrode plate are fixedly mounted on the respective wire slot of matrix by pedestal
On, the pedestal and fluid pipe walls are tightly connected.
It further, further include cover board, the cover board is installed on the outside of the emission electrode plate and/or receiving electrode plate.
Further, the metallic channel is formed by photoetching, etching or grooving method.
Further, the conductor material is installed in metallic channel by sputtering method or other methods.
It is of the invention compared with existing void fraction sensor, there is following technical advantage：
1, measurement method is improved to non-intrusion measurement by intrusive mood measurement, measurement result be original information of flow,
Improve accuracy；
2, modified electrode silk form is reduced to electrode material intensity requirement, and stable structure, is not easy to deform very much,
It not will cause measurement result and relatively large deviation occur；
3, usable high thermal conductivity materials of the invention increase electrode sinking path, improve sensor measurement stability.
It is described further below with reference to technical effect of the attached drawing to design of the invention, specific structure and generation, with
It is fully understood from the purpose of the present invention, feature and effect.
Detailed description of the invention
Fig. 1 is a kind of void fraction sensor circuit schematic diagram in the prior art；
Fig. 2 is a kind of metal mesh structure schematic diagram (vertical view) of void fraction sensor in the prior art；
Fig. 3 is a kind of metal mesh structure schematic diagram (partial side) of void fraction sensor in the prior art；
Fig. 4 is the embedded electrode structural schematic diagram (section view) of a preferred embodiment of the invention；
Fig. 5 is the experimental section and measuring section overall schematic of a preferred embodiment of the invention；
Fig. 6 is the measuring section structural schematic diagram of a preferred embodiment of the invention；
Fig. 7 is the base structure schematic diagram of a preferred embodiment of the invention；
Fig. 8 is the covering plate structure schematic diagram of a preferred embodiment of the invention；
Fig. 9 is the electrode plate structure schematic diagram of a preferred embodiment of the invention；
Wherein, 101- emission electrode, 102- receiving electrode, 103- pipeline, the supply of 104- voltage, 105- operational amplifier,
106- samples/possesses circuit, 107- data/address bus；The latticed wire electrode in 201-64 × 64 and wire electrode diameter=0.25mm,
202- wire electrode spacing=3.5mm, 203- receiving electrode part, 204- emission electrode part；301- sensor spacing=40mm,
302- applies interlamellar spacing, the 2nd WMS of 303- the first WMS, 304-；401- electrode, the insulating matrix material 402-, 403- runner tube wall；
601- pedestal, 602- emission electrode plate, 603- receiving electrode plate, 604- cover board；701- pipeline section interconnecting piece, 702- emission electrode plate
Fixation detent, the fixation detent of 703- receiving electrode plate；901- metallic channel.
Specific embodiment
Multiple preferred embodiments of the invention are introduced below with reference to Figure of description, keep its technology contents more clear and just
In understanding.The present invention can be emerged from by many various forms of embodiments, and protection scope of the present invention not only limits
The embodiment that Yu Wenzhong is mentioned.
In the accompanying drawings, the identical component of structure is indicated with same numbers label, everywhere the similar component of structure or function with
Like numeral label indicates.The size and thickness of each component shown in the drawings are to be arbitrarily shown, and there is no limit by the present invention
The size and thickness of each component.Apparent in order to make to illustrate, some places suitably exaggerate the thickness of component in attached drawing.
Embodiment 1
Emission electrode, the receiving electrode of embedded cavity measuring sensor of the invention are embedded in measurement inner surface of tube wall
In.If runner tube wall 403 is that metallic conductor can surveyed to avoid influence of the tube wall to electrode current by PVD process first
Buret wall forms thickness in the ceramic insulating layer matrix 402 of the fine and close high thermal conductivity of millimeter magnitude, then by etching or swashing
Photoetching technique processes that evenly distributed, mutually orthogonal, width is equal in matrix surface and width is less than or equal to the conducting wire of 0.1mm
Slot.Hereafter, it recycles sputtering method to be filled up matrix surface metallic channel with conductor material (such as copper), and surface is polished,
Structure as shown in Figure 4 is obtained, electrode material 401 is filled by metallic channel to realize the formation of sensor electrode silk, fix electricity
Polar filament position determines wire electrode size, can also radiate to wire electrode.
If runner tube wall is insulator, such as quartz glass, it can be first laid with matrix, grooving can be also carried out directly on tube wall
Metallic channel is formed, then surface metallic channel is filled up with conductor material also with splashing the method for crossing, finally surface is polished i.e.
It can.
Embodiment 2
For being measured in high-pressure flat plate rectangular channel.In rectangular channel measures, for convenient for sensor production and
Meet channel high pressure sealing requirement, first separate measuring section and experiment pipeline section, the two passes through flanged joint, uses between flange close
Seal sealing, experimental section and measuring section overall schematic are as shown in Figure 5.
Measuring section is made of five components, respectively pedestal 601, emission electrode plate 602, receiving electrode plate 603 and two
A cover board 604, measuring section structural schematic diagram are as shown in Figure 6.Pedestal 601 is mainly that two electrodes (transmitting/reception) plate provides fixation
Detent (702/703), and connect and test pipeline section up and down, structural schematic diagram is as shown in Figure 7.Two electrode plate structures are identical, installation
When be mutually 90 degree and be installed on 601 corresponding position of pedestal, pass through sealing ring between electrode plate and pedestal 601 and seal.Two cover boards 604
It is respectively placed on the outside of two electrode plates, improves electrode plate structure intensity, guard electrode plate, structural schematic diagram is as shown in Figure 8.Pass through
Cover board 604, electrode plate are fixed on pedestal 601 by bolt.
The structural schematic diagram of electrode plate is measuring tube wall shape by PVD process first as shown in figure 9, on the inside of electrode plate
At thickness in the ceramic insulating layer matrix of the fine and close high thermal conductivity of millimeter magnitude, then processed by etching technique on surface
Evenly distributed width be 0.1mm metallic channel 901, between slot and slot spacing view measure spatial resolution depending on requiring,
For example, then spacing is 3mm between metallic channel if it is desired to which measuring spatial resolution is 3mm*3mm.Hereafter, sputter is recycled
Method is filled up surface metallic channel with conductor material (such as copper), and is polished to surface, and then makes electrode plate inner surface shape
At structure shown in Fig. 1.Except measured zone, need to metallic channel reasonable Arrangement be avoided bolt hole position, conducting wire is drawn
Measurement pipeline is connected with voltage generating module or current acquisition module.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that the ordinary skill of this field is without wound
The property made labour, which according to the present invention can conceive, makes many modifications and variations.Therefore, all technician in the art
Pass through the available technology of logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Scheme, all should be within the scope of protection determined by the claims.
Claims (10)
1. a kind of embedded cavity measuring sensor, is characterized in that, including emission electrode plate, receiving electrode plate and insulating body,
Described matrix is embedded in fluid pipe walls inner surface, on the surface of described matrix equipped with evenly distributed, mutually orthogonal, width is equal
Metallic channel, conductor material is equipped in the metallic channel, the emission electrode plate and receiving electrode plate are mutually 90 degree of fixed peaces
On the respective wire slot of matrix.
2. embedded cavity measuring sensor as described in claim 1, which is characterized in that the fluid pipe walls inner surface is to lead
Body material, described matrix are laid in measurement inner surface of tube wall.
3. embedded cavity measuring sensor as claimed in claim 2, which is characterized in that described matrix with a thickness of 0.1-
5mm。
4. embedded cavity measuring sensor as claimed in claim 2, which is characterized in that described matrix is high thermal conductivity material
Material.
5. embedded cavity measuring sensor as described in claim 1, which is characterized in that the fluid pipe walls inner surface is exhausted
Edge material, described matrix are to measure the partial region of inner surface of tube wall or be laid in measurement inner surface of tube wall.
6. embedded cavity measuring sensor a method as claimed in any one of claims 1 to 5, which is characterized in that the width of the metallic channel
Less than or equal to 0.1mm.
7. embedded cavity measuring sensor a method as claimed in any one of claims 1 to 5, the emission electrode plate and receiving electrode plate
It is fixedly mounted on the respective wire slot of matrix by pedestal, the pedestal and fluid pipe walls are tightly connected.
8. embedded cavity measuring sensor a method as claimed in any one of claims 1 to 5, which is characterized in that it further include cover board, it is described
Cover board is installed on the outside of the emission electrode plate and/or receiving electrode plate.
9. embedded cavity measuring sensor a method as claimed in any one of claims 1 to 5, which is characterized in that the metallic channel is to pass through
Photoetching, etching or grooving method are formed.
10. embedded cavity measuring sensor a method as claimed in any one of claims 1 to 5, which is characterized in that the conductor material is
It is installed in metallic channel by sputtering method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810650361.9A CN108845005A (en) | 2018-06-22 | 2018-06-22 | Suitable for heating the embedded cavity measuring sensor of plate channel two-phase flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810650361.9A CN108845005A (en) | 2018-06-22 | 2018-06-22 | Suitable for heating the embedded cavity measuring sensor of plate channel two-phase flow |
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| Publication Number | Publication Date |
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| CN108845005A true CN108845005A (en) | 2018-11-20 |
Family
ID=64201983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201810650361.9A Pending CN108845005A (en) | 2018-06-22 | 2018-06-22 | Suitable for heating the embedded cavity measuring sensor of plate channel two-phase flow |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109920560A (en) * | 2019-03-06 | 2019-06-21 | 上海交通大学 | The grid spacer optimization method and device of fuel assembly |
| CN111912880A (en) * | 2020-07-15 | 2020-11-10 | 中国核动力研究设计院 | Narrow rectangular channel full-field transient cavitation share measurement system and method |
| CN111982462A (en) * | 2020-08-06 | 2020-11-24 | 中国石油大学(北京) | Plate-shell type heat exchanger experimental device |
| CN113125524A (en) * | 2021-04-19 | 2021-07-16 | 上海交通大学 | Single-layer net type silk screen sensor |
| CN113610727A (en) * | 2021-08-05 | 2021-11-05 | 上海交通大学 | Boundary reconstruction sharpening method for two-phase volume fraction image |
| CN113984839A (en) * | 2021-11-02 | 2022-01-28 | 上海交通大学 | Novel capacitive silk screen sensor for high-conductivity fluid measurement |
| CN114527177A (en) * | 2022-02-21 | 2022-05-24 | 上海交通大学 | Liquid metal gas-liquid two-phase flow cross section instantaneous vacuole share distribution imaging system |
| WO2022268762A1 (en) * | 2021-06-25 | 2022-12-29 | Helmholtz-Zentrum Dresden - Rossendorf E.V. | Grid sensor, grid sensor system, evaluation device and computer program product for correcting an interfering influence of one or more fluids |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109920560A (en) * | 2019-03-06 | 2019-06-21 | 上海交通大学 | The grid spacer optimization method and device of fuel assembly |
| CN111912880A (en) * | 2020-07-15 | 2020-11-10 | 中国核动力研究设计院 | Narrow rectangular channel full-field transient cavitation share measurement system and method |
| CN111912880B (en) * | 2020-07-15 | 2022-04-15 | 中国核动力研究设计院 | Narrow rectangular channel full-field transient cavitation share measurement system and method |
| CN111982462A (en) * | 2020-08-06 | 2020-11-24 | 中国石油大学(北京) | Plate-shell type heat exchanger experimental device |
| CN113125524A (en) * | 2021-04-19 | 2021-07-16 | 上海交通大学 | Single-layer net type silk screen sensor |
| WO2022268762A1 (en) * | 2021-06-25 | 2022-12-29 | Helmholtz-Zentrum Dresden - Rossendorf E.V. | Grid sensor, grid sensor system, evaluation device and computer program product for correcting an interfering influence of one or more fluids |
| CN113610727A (en) * | 2021-08-05 | 2021-11-05 | 上海交通大学 | Boundary reconstruction sharpening method for two-phase volume fraction image |
| CN113610727B (en) * | 2021-08-05 | 2022-06-21 | 上海交通大学 | Boundary reconstruction sharpening method for two-phase volume fraction image |
| CN113984839A (en) * | 2021-11-02 | 2022-01-28 | 上海交通大学 | Novel capacitive silk screen sensor for high-conductivity fluid measurement |
| CN114527177A (en) * | 2022-02-21 | 2022-05-24 | 上海交通大学 | Liquid metal gas-liquid two-phase flow cross section instantaneous vacuole share distribution imaging system |
| CN114527177B (en) * | 2022-02-21 | 2022-10-21 | 上海交通大学 | Liquid metal gas-liquid two-phase flow cross section instantaneous void fraction distribution imaging system |
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