CN106768098A - Droplet distribution measuring method and device in a kind of rectangular channel inner annular gas core - Google Patents
Droplet distribution measuring method and device in a kind of rectangular channel inner annular gas core Download PDFInfo
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- CN106768098A CN106768098A CN201710013148.2A CN201710013148A CN106768098A CN 106768098 A CN106768098 A CN 106768098A CN 201710013148 A CN201710013148 A CN 201710013148A CN 106768098 A CN106768098 A CN 106768098A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 77
- 238000005259 measurement Methods 0.000 claims abstract description 59
- 239000007791 liquid phase Substances 0.000 claims description 38
- 239000012071 phase Substances 0.000 claims description 34
- 229910001220 stainless steel Inorganic materials 0.000 claims description 17
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- 229910052737 gold Inorganic materials 0.000 description 2
- UPYKUZBSLRQECL-UKMVMLAPSA-N Lycopene Natural products CC(=C/C=C/C=C(C)/C=C/C=C(C)/C=C/C1C(=C)CCCC1(C)C)C=CC=C(/C)C=CC2C(=C)CCCC2(C)C UPYKUZBSLRQECL-UKMVMLAPSA-N 0.000 description 1
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- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- OAIJSZIZWZSQBC-GYZMGTAESA-N lycopene Chemical compound CC(C)=CCC\C(C)=C\C=C\C(\C)=C\C=C\C(\C)=C\C=C\C=C(/C)\C=C\C=C(/C)\C=C\C=C(/C)CCC=C(C)C OAIJSZIZWZSQBC-GYZMGTAESA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/44—Venturi tubes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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Abstract
The invention discloses a kind of method and apparatus that can measure rectangular channel annular flow gaseous core droplet distribution.The liquid film of annular flow is separated with gaseous core by setting spout hole at the rectangular channel place of being close to the exit, the drop in gaseous core is then carried out into subregion measurement, so as to obtain the distribution characteristics of drop at each section of rectangular channel annular flow gaseous core.The method simple possible, can accurately measure the droplet distribution at each section of rectangular channel annular flow gaseous core, have tangible advantage and significant progress.It is an advantage of the invention that：The distribution character of drop in rectangular channel inner annular stream vapour core can accurately be measured；Can be realized by the improvement of existing equipment, low cost；It is easy for installation, using simple.
Description
Technical field
The present invention relates to a kind of measuring method of annular flow concentration of liquid drops distribution, and in particular to a kind of rectangular channel inner annular
Droplet distribution measuring method and device in gas core.
Background technology
When gas-liquid two-phase fluid flows in adiabatic or heating pipe, because of pressure, flow, heat flow density and pipe shape
Difference various gas-liquid two-phase distribution forms, abbreviation flow pattern occur.Annular flow is a kind of very common stream of biphase gas and liquid flow
Type.In this flow pattern, liquid phase is in membranaceous flowing along tube wall, and gas phase flows in runner core, and contains quilt in the gas flow
The fine drop that gas is taken away from liquid film.In heating pipe, liquid film is gradually evaporated on streamwise, the drop in gaseous core
Also it is partially depositing on liquid film.When it is zero that the deposition summation of liquid film evaporation amount, drop on liquid film causes liquid film flow
Heating wall can not be winding is effectively cooled, and just occur that dry type burns, and the hot-fluid occurred when the dry type of heating wall burns is close
Degree is referred to as critical heat flux density.It is closely bound up that dry type burns the parameters such as critical heat flux density and thickness, the concentration of liquid drops of liquid film.
The concentration distribution of drop is not only relevant with the factor such as thickness of liquid film, liquid phase flow rate, gas phase flow velocity in ring-type stream,
And the factor such as shape, the flow direction with runner is relevant.Especially in inclination or bottom horizontal flow sheet, liquid under gravity
Drop is favoured and is distributed in runner bottom.The total concentration of drop in gaseous core is only measured in measurement annular flow at present, it is dry in order to improve
The predictive ability of the type that dries up critical heat flux density model, especially inclines the dry type critical heat flux density model with horizontal run,
It is highly desirable to measure the method for droplet distribution in annular flow gaseous core, obtains the distribution character of drop in gaseous core, develops annular flow
Droplet distribution mechanism model, so that optimizing dry type critical heat flux density calculates analysis model.
The content of the invention
The technical problems to be solved by the invention are droplet distributions in measurement annular flow gaseous core, it is therefore intended that provide a kind of square
Droplet distribution measuring method and device in shape passage inner annular gas core, solve droplet distribution in rectangular channel inner annular gas core
Measurement problem, obtain gaseous core in drop distribution character, develop annular flow droplet distribution mechanism model, so as to optimize dry type
Critical heat flux density calculates analysis model.
The present invention is achieved through the following technical solutions：
Droplet distribution measuring method and device in a kind of rectangular channel inner annular gas core, including liquid phase control device are gentle
Phase control device, liquid phase control device is by the liquid phase feeding mechanism, liquid phase flow control valve and the liquid phase flow measurement that are sequentially connected
Device is constituted, and gas phase control device is by the gas phase feeding mechanism, gas phase flow rate regulating valve, the gas phase flow rate measurement apparatus that are sequentially connected
Composition, also including the rectangularl runner being connected with the gentle phase control device of liquid phase control device, is provided with liquid film stream on rectangularl runner
Measuring device, rectangularl runner is also associated with drop and collects and measurement apparatus.Liquid phase feeding mechanism can use running water and add
Boiler provides the water of different temperatures, flow velocity.Gas phase feeding mechanism can provide not equality of temperature using air compressor machine and heater
Degree, the air of flow velocity.Liquid and gas can be adjusted by the aperture for adjusting the gentle phase flow rate regulating valve of liquid phase flow control valve
Flow.Liquid phase flow measurement device and can with gas phase flow rate measurement apparatus use Venturi meter, V cone flow meters or matter
Amount flowmeter.After the water that liquid phase feeding mechanism is produced is through liquid phase flow control valve and liquid phase flow measurement device, supplied with gas phase
The air that device is produced is mixed, subsequently into rectangularl runner.Measured by adjusting the gentle phase flow rate of liquid phase flow control valve
Device can make rectangularl runner different thickness of liquid films, the annular flow flow pattern of concentration of liquid drops distribution occur.By on rectangularl runner
Liquid film flow measurement device is set and drop is collected and measurement apparatus, different thickness of liquid films, concentration of liquid drops in measurement rectangularl runner
Distribution.
The rectangularl runner by metal rectangular runner, the spout hole being arranged on metal rectangular runner and with spout hole pair
The liquid film collection vessel composition answered, the liquid film flow measurement device and liquid film coated lycopene.Rectangularl runner is main by gold
Category rectangularl runner, spout hole and liquid film collection vessel are constituted.Metal rectangular runner can be according to plate type heat exchanger, nuclear reactor plate
The flow passage structure of formula fuel element makes the structure of different length-width ratios.When biphase gas and liquid flow flows in rectangularl runner, liquid film edge
Metal rectangular flow passage, gas entrained drip is in rectangularl runner intermediate flow.7 overflowings are devised in metal rectangular runner exit
Discharge orifice.Spout hole separates out mouth and must not be too far away, can not too nearly 5~10mm it is preferable.When spout hole is away from metal rectangular runner exit
The concentration of liquid drops distribution of outlet can be caused to change.If it is too near that spout hole separates out mouth, when thickness of liquid film is thicker, liquid film can not
All concentration of liquid drops distribution measuring results will be influenceed from spout hole discharge.Liquid film enters liquid film and collects appearance from after spout hole outflow
Device.The outlet of liquid film collection vessel is connected with liquid film flow measurement device.Liquid film flow measurement device can be entered using graduated cylinder, measuring cup
Liquid quality in row cooling water of units of measurement time obtains liquid film flow
The drop is collected and measurement apparatus are mainly made up of separation grid, stainless steel cloth and drip collector.Grid
Side both sides are drip collector, and it is independent drip collector that one separates grid side, and drop is collected and measurement apparatus master
To be made up of separation grid, stainless steel cloth and drip collector.Air water two-phase mixture after separated grid isolation passes through
After stainless steel cloth, air from mesh leave drop collect and measurement apparatus, drop product in stainless steel cloth lower surface, in gravity
In the presence of along stainless steel wire net surface influent drip collector.
A kind of method suitable for rectangular channel annular flow droplet distribution, including next coming in order are the step of carry out：
A, the spout hole set in rectangular channel are separated to the liquid film of annular flow with gaseous core；
B, the gaseous core to being isolated in step A, subregion isolation is carried out using grid is separated to gaseous core；
C, to isolating in step B after gaseous core, measure the droplet flow in each region, calculate the distribution of drop.It is logical
Overregulating the gentle phase flow rate measurement apparatus of liquid phase flow control valve can make rectangularl runner different thickness of liquid films, concentration of liquid drops occur
The annular flow flow pattern of distribution.By setting liquid film flow measurement device and drop collection and measurement apparatus on rectangularl runner, survey
Different thickness of liquid films, the distribution of concentration of liquid drops in amount rectangularl runner.
Collected using drop and measurement apparatus can separate drop from gaseous core, and do not influence the measurement result of drop.
Air water two-phase mixture after separated grid isolation is by the way that after stainless steel cloth, air leaves drop and collects and measurement from mesh
Device, drop product drips collector along stainless steel wire net surface influent under gravity in stainless steel cloth lower surface；It is logical
Measurement drip collector drop collecting amount is crossed to obtain the distribution of drop in each channel isolation.Comprehensive liquid phase flow measurement device is surveyed
Liquid phase total flow, the droplet flow result that measures of the liquid film flow that measures of liquid film flow measurement device and drip collector,
It was found that the deviation of the droplet flow summation that measures of each drip collector and the difference of liquid phase total flow depletion film flow 10% with
It is interior.
The present invention compared with prior art, has the following advantages and advantages：
1st, droplet distribution measuring method and device in a kind of rectangular channel inner annular gas core of the invention, can accurately measure
The distribution character of drop in rectangular channel inner annular stream vapour core；
2nd, droplet distribution measuring method and device in a kind of rectangular channel inner annular gas core of the invention, can be by existing
The improvement realization of equipment, low cost；
3rd, droplet distribution measuring method and device in a kind of rectangular channel inner annular gas core of the invention, easy for installation, makes
With simple.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is schematic structural view of the invention；
Fig. 2 is rectangularl runner structural representation of the present invention；
Fig. 3 is that drop of the present invention is collected and measurement apparatus schematic diagram；
Fig. 4 is that drop of the present invention is collected and measurement apparatus schematic diagram.
Mark and corresponding parts title in accompanying drawing：
1- liquid phase feeding mechanisms, 2- liquid phase flow control valves, 3- liquid phase flow measurement devices, 4- gas phase feeding mechanisms, 5-
Gas phase flow rate regulating valve, 6- gas phase flow rate measurement apparatus, 7- rectangularl runners, 8- liquid film flow measurement devices, 9- drops collect and
Measurement apparatus, 10- metal rectangular runners, 11- spout holes, 12- liquid film collection vessels, 13- separation grids, 14- stainless steel cloths,
15- drip collectors.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
It is limitation of the invention.
Embodiment
As shown in Figures 1 to 4, droplet distribution measuring method and device in a kind of rectangular channel inner annular gas core of the invention,
Liquid phase feeding mechanism 1 can provide the water of different temperatures, flow velocity using running water and heating water tank.Gas phase feeding mechanism 4 can
To provide the air of different temperatures, flow velocity using air compressor machine and heater.By adjusting liquid phase flow control valve 2 and gas phase stream
The aperture of adjustable valve 5 can adjust the flow of liquid and gas.Liquid phase flow measurement device 3 and can with gas phase flow rate measure fill
6 are put using Venturi meter, V cone flow meters or mass flowmenter.The water that liquid phase feeding mechanism 1 is produced is adjusted through liquid phase flow
After section valve 2 and liquid phase flow measurement device 3, the air produced with gas phase feeding mechanism 4 is mixed, subsequently into rectangularl runner
7.By adjust liquid phase flow control valve 2 and gas phase flow rate measurement apparatus 6 can make rectangularl runner 7 occur different thickness of liquid films,
The annular flow flow pattern of concentration of liquid drops distribution.The structure of rectangularl runner 7 is as shown in Figure 2.Rectangularl runner 7 is main by metal rectangular runner
10th, spout hole 11 and liquid film collection vessel 12 are constituted.Metal rectangular runner 10 can be board-like according to plate type heat exchanger, nuclear reactor
The flow passage structure of fuel element makes the structure of different length-width ratios.When biphase gas and liquid flow flows in rectangularl runner, liquid film is along gold
Category rectangularl runner 10 flows, and gas entrained drip is in the intermediate flow of rectangularl runner 7.7 in the exit design of metal rectangular runner 10
Overflowing discharge orifice 11.Spout hole 11 separates out mouth and must not be too far away, can not too nearly 5~10mm it is preferable.When spout hole 11 is away from metal square
Shape runner 10 is exported can cause the concentration of liquid drops distribution of outlet to change.If it is too near that spout hole 11 separates out mouth, thickness of liquid film
When thicker, liquid film all can not will influence concentration of liquid drops distribution measuring results from the discharge of spout hole 11.Liquid film is from spout hole 11
Enter liquid film collection vessel 12 after outflow.The outlet of liquid film collection vessel 12 is connected with liquid film flow measurement device 8.Liquid film flow is surveyed
The liquid quality that amount device 8 can be measured in the unit interval using graduated cylinder, measuring cup obtains liquid film flow.Drop is collected and surveyed
Amount device 9 is mainly made up of separation grid 13, stainless steel cloth 14 and drip collector.For the width side of rectangular channel 7 not
Together, two kinds are devised and separates grid 13, stainless steel cloth 14 and drip collector 15.Fig. 3 and Fig. 4 are respectively narrow and broadside drop
The drop of distribution measuring is collected and the schematic diagram of measurement apparatus 9.Fig. 3 display narrow edge direction accesses of stream separate grid 13 by rectangularl runner
Drop on 7 outlets is separated along row, and rectangular channel gaseous core is measured by measuring the drop mass flow of each separated region
Middle concentration of liquid drops along narrow side distribution.After air water two-phase mixture after the isolation of separated grid 13 passes through stainless steel cloth 14,
Air leaves drop and collects and measurement apparatus 9 from mesh, drop product in the lower surface of stainless steel cloth 14, edge under gravity
The surface of stainless steel cloth 14 flows into drip collector 15.The angle of inclination of stainless steel cloth 14 preferably between 45 degree to 70 degree,
Angle of inclination too droplet collects to be gathered into after big drop and directly fall influence measurement result, and angle of inclination is difficult greatly very much to ensure not
The planarization of rust steel wire 14, so as to influence drop toward the flowing of drip collector 15.Stainless steel cloth 14 should at least reach 100
Mesh, so can just make most drops not take drop out of by air and collect and measurement apparatus 9.By measuring drip collector
15 drop collecting amounts obtain the distribution of drop in each channel isolation.The liquid phase that comprehensive liquid phase flow measurement device 3 is measured always flows
The droplet flow result that the liquid film flow and drip collector 15 that amount, liquid film flow measurement device 8 are measured are measured, finds each drop
The deviation of droplet flow summation that collector 15 is measured and the difference of liquid phase total flow depletion film flow is within 10%.According to each
The droplet flow that drip collector 15 is measured can obtain the distribution of concentration of liquid drops in annular flow along narrow edge direction.Fig. 4 shows point
Grid out of place 13 are separated the drop on the outlet of rectangularl runner 7 along broadside, by the liquid for measuring each separated region
Drop mass flow measures the distribution of concentration of liquid drops in rectangular channel gaseous core along broadside.Under identical test Parameter Conditions, that is, enter
Oral fluid phase flow rate, temperature；Inlet air flow rate, temperature all same, rectangular channel is measured using narrow side droplet distribution measurement apparatus
In annular flow gaseous core drop along narrow side distribution, using broadside droplet distribution measurement apparatus measurement rectangular channel annular flow gaseous core in
Drop along broadside distribution, the measurement result on comprehensive width side can obtain the distribution of drop in rectangular channel annular flow gaseous core.
Change the angle of inclination of rectangularl runner 7, drop in rectangular channel annular flow gaseous core can be obtained under the conditions of differing tilt angles
Distribution.
Above-described specific embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that and the foregoing is only specific embodiment of the invention, be not intended to limit the present invention
Protection domain, all any modification, equivalent substitution and improvements within the spirit and principles in the present invention, done etc. all should include
Within protection scope of the present invention.
Claims (5)
1. a kind of gentle phase control dress of droplet distribution measurement apparatus in rectangular channel inner annular gas core, including liquid phase control device
Put, liquid phase control device is filled by liquid phase feeding mechanism (1), liquid phase flow control valve (2) and the liquid phase flow measurement being sequentially connected
(3) composition is put, gas phase control device is by the gas phase feeding mechanism (4), gas phase flow rate regulating valve (5), the gas phase flow rate that are sequentially connected
Measurement apparatus (6) are constituted, it is characterised in that the also rectangularl runner including being connected with the gentle phase control device of liquid phase control device
(7) liquid film flow measurement device (8), is provided with rectangularl runner (7), rectangularl runner (7) is also associated with drop and collects and measure
Device (9).
2. droplet distribution measurement apparatus in a kind of rectangular channel inner annular gas core according to claim 1, its feature exists
In, the rectangularl runner (7) by metal rectangular runner (10), the spout hole (11) being arranged on metal rectangular runner (10) and
Liquid film collection vessel (12) composition corresponding with spout hole (11), the liquid film flow measurement device (8) and liquid film collection vessel
(12) it is connected.
3. droplet distribution measurement apparatus in a kind of rectangular channel inner annular gas core according to claim 1, its feature exists
In the drop is collected and measurement apparatus (9) are including separating grid (13), stainless steel cloth (14) and drip collector (15).
4. a kind of method suitable for rectangular channel annular flow droplet distribution, it is characterised in that including the step that next coming in order are carried out
Suddenly：
A, the spout hole (11) set in rectangular channel are separated to the liquid film of annular flow with gaseous core；
B, the gaseous core to being isolated in step A, subregion isolation is carried out using grid (13) is separated to gaseous core；
C, to isolating in step B after gaseous core, measure the droplet flow in each region, calculate the distribution of drop.
5. a kind of method suitable for rectangular channel annular flow droplet distribution according to claim 4, it is characterised in that adopt
Collected with drop and measurement apparatus (9) can separate drop from gaseous core, and do not influence the measurement result of drop.
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| CN201710013148.2A CN106768098B (en) | 2017-01-09 | 2017-01-09 | Droplet distribution measuring method and device in a kind of rectangular channel inner annular gas core |
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| CN108534857A (en) * | 2018-03-19 | 2018-09-14 | 天津大学 | A kind of annular flow liquid film is collected and metering device |
| CN108548576A (en) * | 2018-03-19 | 2018-09-18 | 天津大学 | A kind of annular flow liquid film separation and mass metrology method |
| CN108815927B (en) * | 2018-06-12 | 2021-05-14 | 哈尔滨工程大学 | Multifunctional wide-flow-path efficient gas-liquid separation device combining gravity and centrifugal technology |
| CN113804851A (en) * | 2020-06-15 | 2021-12-17 | 中国石油化工股份有限公司 | Liquid film and liquid drop carrying capacity simulation device and method |
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| CN108534857B (en) * | 2018-03-19 | 2019-11-01 | 天津大学 | A kind of annular flow liquid film is collected and metering device |
| CN108815927B (en) * | 2018-06-12 | 2021-05-14 | 哈尔滨工程大学 | Multifunctional wide-flow-path efficient gas-liquid separation device combining gravity and centrifugal technology |
| CN113804851A (en) * | 2020-06-15 | 2021-12-17 | 中国石油化工股份有限公司 | Liquid film and liquid drop carrying capacity simulation device and method |
| CN113804851B (en) * | 2020-06-15 | 2024-05-14 | 中国石油化工股份有限公司 | Liquid film and liquid drop carrying amount simulation device and method |
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