CN103592103A - Mini-channel liquid-solid two-phase flow parameter measurement device and method based on laser extinction method - Google Patents
Mini-channel liquid-solid two-phase flow parameter measurement device and method based on laser extinction method Download PDFInfo
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Abstract
The invention discloses a detection device and method for measuring the cross section concentration and the particle mean velocity of mini-channel liquid-solid two-phase flow on the basis of a laser extinction method. A beam splitter prism and a reflective mirror which are connected with each other are arranged on one side of a liquid-solid small-pipe-diameter transparent test pipe section, a first integrating sphere device and a second integrating sphere device which correspond to the beam splitter prism and the reflective mirror are arranged on the other side of the liquid-solid small-pipe-diameter transparent test pipe section, the first integrating sphere device is connected with a photovoltaic conversion circuit board through a first photocell sensor, the second integrating sphere device is connected with the photovoltaic conversion circuit board through a second photocell sensor, the photoelectric conversion circuit board, a data collection module and a microcomputer are sequentially connected with one another, and a laser device, a beam expander, a slit and the beam splitter prism are sequentially connected with one another. The mini-channel liquid-solid two-phase flow parameter measurement device and method have the advantages of being simple in structure and low in cost, conducting non-contact measurement, being high in accuracy and the like, and provide beneficial reference for research and development of the new technology of mini-channel liquid-solid two-phase flow parameter measurement.
Description
Technical field
The present invention relates to multiphase flow measurement field, relate in particular to a kind of passage aisle liquid fixed double phase flow parameter measuring apparatus and method based on laser light extinction method.
Background technology
Passage aisle liquid fixed double phase flow is extensively present in medicine, chemical industry, material and the field such as prepares, and the detection of its flow characteristics and parameter is had to important theory significance and practical value.Under conventional caliber, for the flow parameter of liquid fixed double phase flow and the detection method of characteristic, mainly contain microscopic method, sedimentation, supercritical ultrasonics technology, electro-induction method etc.But for the liquid fixed double phase flow under the parameters such as different grain sizes, Size Distribution, concentration, the research of flow characteristics and measurement method of parameters in passage aisle rarely has report in existing document.Microscopic method is the most most realistic a kind of measuring method, be often used as a kind of demarcation to other measuring methods, but owing to directly observing by human eye, personal error is larger, and Measuring Time is long; Sedimentation is based on particles settling principle, and instrument and the kind of measurement are many, but not high for the fine particle measuring accuracy of doing Brownian movement; Ultrasonic method is utilized ultrasound wave strong penetrating power, outstanding to the measuring characteristic of high concentration particle, but experiment condition influence factor is many, complicated mechanism; Electro-induction method has very high measuring speed and precision, reproducible, but the method belongs to contact measurement method, and when particle tested has wider particle diameter to distribute, measures aperture very easily blocked.Yet the method for laser non-contacting advantage quick, accurate, convenient with it and convection cell comes into one's own and develops rapidly, and applies, wherein, by transmitted light intensity, come the method for particle tested parameter to mainly contain light extinction method, light Fluctuation Method, delustring fluctuating Spectrum Method.The present invention is incorporated into laser light extinction method in passage aisle liquid fixed double phase flow parameter detecting, build the experimental provision that in a set of grade caliber liquid fixed double phase flow combining with correlation measurement technology based on laser light extinction method, fine particle flow parameter detects, can carry out experimental study to the concentration of particle and mean flow rate, so the method and device has suitable reference value for the measurement of passage aisle liquid fixed double phase flow parameter.
Summary of the invention
The object of the invention is to overcome the deficiency of liquid fixed double phase flow parameter detecting technology in existing passage aisle, a kind of passage aisle liquid fixed double phase flow parameter measuring apparatus and method based on laser light extinction method is provided.
The measuring system of measuring passage aisle liquid fixed double phase flow parameter based on laser light extinction method comprises laser instrument, beam expanding lens, slit, Amici prism, reflective mirror, the transparent test pipeline section of liquid-solid pipe with small pipe diameter, the first photoelectric cell sensor, the second photoelectric cell sensor, photoelectric switching circuit plate, data acquisition module, microcomputer, first integral ball device, second integral ball device, a side at the transparent test pipeline section of liquid-solid pipe with small pipe diameter is provided with the Amici prism being connected, reflective mirror, opposite side at the transparent test pipeline section of liquid-solid pipe with small pipe diameter is provided with and Amici prism, the first integral ball device that reflective mirror is corresponding, second integral ball device, first integral ball device is connected with photoelectric switching circuit plate by the first photoelectric cell sensor, second integral ball device is connected with photoelectric switching circuit plate by the second photoelectric cell sensor, photoelectric switching circuit plate, data acquisition module, microcomputer is connected in turn, laser instrument, beam expanding lens, slit, Amici prism is connected in turn.
The measuring method of measuring passage aisle liquid fixed double phase flow parameter based on laser light extinction method comprises the measuring method of rolling particles section concentration and the measuring method of rolling particles mean flow rate:
1) measuring method of rolling particles section concentration is:
The laser that laser instrument sends passes through beam expanding lens, slit, Amici prism, it is by force the parallel laser light beam of I0 that reflective mirror obtains two-beam, by first integral ball device, second integral ball device is collected the outgoing beam of two bundle parallel laser light beams after testing conduit decay, make emergent light be evenly distributed on respectively first integral ball device, on second integral ball device, by the first photoelectric cell sensor, the second photoelectric cell sensor detects respectively first integral ball device, the light intensity at second integral ball device exit portal place, can obtain the light intensity I of two bundle parallel laser light beams light beam after testing conduit decay, the caliber of testing conduit is grade, detect first integral ball device, the diameter of second integral ball device is 1 centimetre,
The section concentration of the liquid fixed double phase flow mixing particle in passage aisle
2) measuring method of rolling particles mean flow rate is:
The laser that laser instrument sends passes through beam expanding lens, slit, Amici prism, it is by force the parallel laser light beam of I0 that reflective mirror obtains two-beam, by first integral ball device, second integral ball device is collected the outgoing beam of two bundle parallel laser light beams after testing conduit decay, make emergent light be evenly distributed on respectively first integral ball device, on second integral ball device, by the first photoelectric cell sensor, the second photoelectric cell sensor detects respectively first integral ball device, the light intensity at second integral ball device exit portal place, the light intensity time t that can obtain two bundle parallel laser light beams light beam after testing conduit decay changes separate signal x (t1) and y (t2), this signal is carried out to cross-correlation calculation
obtain in liquid fixed double phase flow grain flow through the time of upstream and downstream sensor τ
0, last because the distance between upstream and downstream light beam (d) is fixed, be calculated as follows out the mean flow rate of particle in liquid fixed double phase flow
The present invention is directed to the present situation that passage aisle liquid fixed double phase flow parameter detecting means lack, utilize laser light extinction method, and cross-correlation technique carries out data processing, proposed a kind of passage aisle liquid fixed double phase flow parameter measuring apparatus and method based on laser light extinction method.Simple in structure, the advantage such as cost is low, non-cpntact measurement, measurement sensitivity height that related device has, for the research and development of passage aisle liquid-solid two-phase flow parameter measurement new technology provides helpful reference.
Accompanying drawing explanation
Fig. 1 is the passage aisle liquid fixed double phase flow parameter measuring apparatus structural representation based on laser light extinction method;
Fig. 2 is the passage aisle liquid-solid two-phase flow parameter measurement method schematic diagram based on laser light extinction method;
Fig. 3 is the relation curve between granule density N and light intensity I;
In figure: laser instrument 1, beam expanding lens 2, slit 3, Amici prism 4, reflective mirror 5, the transparent test pipeline section 6 of liquid-solid pipe with small pipe diameter, separate upstream and downstream photoelectric cell sensor 7, photoelectric switching circuit plate 8, data acquisition module 9, microcomputer 10, integrating sphere device 11.
Embodiment
As shown in Figure 1, the measuring system based on laser light extinction method measurement passage aisle liquid fixed double phase flow parameter comprises laser instrument 1, beam expanding lens 2, slit 3, Amici prism 4, reflective mirror 5, the transparent test pipeline section 6 of liquid-solid pipe with small pipe diameter, the first photoelectric cell sensor 7.1, the second photoelectric cell sensor 7.2, photoelectric switching circuit plate 8, data acquisition module 9, microcomputer 10, first integral ball device 11.1, second integral ball device 11.2, a side at the transparent test pipeline section 6 of liquid-solid pipe with small pipe diameter is provided with the Amici prism 4 being connected, reflective mirror 5, opposite side at the transparent test pipeline section 6 of liquid-solid pipe with small pipe diameter is provided with and Amici prism 4, the first integral ball device 11.1 that reflective mirror 5 is corresponding, second integral ball device 11.2, first integral ball device 11.1 is connected with photoelectric switching circuit plate 8 by the first photoelectric cell sensor 7.1, second integral ball device 11.2 is connected with photoelectric switching circuit plate 8 by the second photoelectric cell sensor 7.2, photoelectric switching circuit plate 8, data acquisition module 9, microcomputer 10 is connected in turn, laser instrument 1, beam expanding lens 2, slit 3, Amici prism 4 is connected in turn.
As shown in Figure 2, the measuring method based on laser light extinction method measurement passage aisle liquid fixed double phase flow parameter comprises the measuring method of rolling particles section concentration and the measuring method of rolling particles mean flow rate:
1) measuring method of rolling particles section concentration is:
It is by force I that the laser that laser instrument 1 sends obtains two-beam by beam expanding lens 2, slit 3, Amici prism 4, reflective mirror 5
0parallel laser light beam, by first integral ball device 11.1, second integral ball device 11.2 is collected the outgoing beam of two bundle parallel laser light beams after testing conduit 6 decay, make emergent light be evenly distributed on respectively first integral ball device 11.1, on second integral ball device 11.2, by the first photoelectric cell sensor 7.1, the second photoelectric cell sensor 7.2 detects respectively first integral ball device 11.1, the light intensity at second integral ball device 11.2 exit portal places, can obtain the light intensity I of two bundle parallel laser light beams light beam after testing conduit 6 decay, the caliber of testing conduit 6 is grade, detect first integral ball device 11.1, the diameter of second integral ball device 11.2 is 1 centimetre.
The section concentration of the liquid fixed double phase flow mixing particle in passage aisle
K is that extinction coefficient can be expressed as K (λ, m, D), wherein λ is optical maser wavelength, m is the complex index of particle, and the diameter that D is particle, first the in the situation that of known N, according to above formula, record relation curve between granule density N and light intensity I as shown in Figure 3, the actual conditions that can record according to experiment come inverting to obtain extinction coefficient K; After recording extinction coefficient K, the particle of every kind of particle diameter is made into respectively to the mixed liquor of variable concentrations,
Record by experiment the light intensity I of the rear light beam of decay, can calculate the section concentration (N) of particle;
Fine particle section concentration measuring principle:
From Lambert-Beer light transmission law, output intensity in the pass of incident intensity is
I＝I
0exp(-σL)
In formula, σ is turbidity, the thickness that L is granule medium.The simplest but in disperse system, if medium is N the spheric grain that particle diameter is D, total turbidity is
σ＝NKε(π/4)D
2KN
The side to light that in formula, ε is particle is long-pending, and K is extinction coefficient.Press Mie theoretical, its expression formula is
α in formula=(π/λ) D is zero dimension dimensional parameters, a
n, b
nfor Mie coefficient, can be expressed as K (λ, m, D), wherein λ is optical maser wavelength, the complex index that m is particle, D is grain diameter.If the monodisperse system of known particle diameter, while using Same Wavelength laser beam irradiation particle, extinction coefficient K (λ, m, D) is constant.Therefore only to count N relevant with spheric grain for turbidity σ.
Because incident intensity and output intensity can measure by integrating sphere pick-up unit, so fine particle section concentration can be expressed as relational expression:
N＝f(λ,m,D,L,I)
When in formula, λ and m are under same measuring condition, for known constant, L is granule medium thickness, and the granule medium thickness of the liquid fixed double phase flow mixing in passage aisle is pipe diameter size, therefore can set up the relational expression of concentration and grain diameter (D) and caliber (L):
N＝f(D,L,I)
Fine particle section concentration measuring process is as follows:
1) integrating sphere is detected to the outer wall placement of being close to testing conduit, guarantee that outgoing luminous energy all enters in integrating sphere.After device has all placed, open laser instrument, allow its preheating 40 minutes.
2) after laser instrument has been stablized, the laser intensity I while first measuring blank pipe
0
3) open liquid fixed double phase flow drive unit, when two-phase flow fluid stable flows through testing conduit, measure the emergent light intensity I of Ear Mucosa Treated by He Ne Laser Irradiation two-phase flow
4) determining optical maser wavelength, particle refractive index, particle diameter, medium first in the situation that of known N after pipe diameter size, according to above formula, record relation curve between granule density N and light intensity I as shown in Figure 3, the actual conditions that can record according to experiment come inverting to obtain extinction coefficient K; After recording extinction coefficient K, the particle of every kind of particle diameter is made into respectively to the mixed liquor of variable concentrations, record by experiment the light intensity I of the rear light beam of decay, can basis
2) measuring method of rolling particles mean flow rate is:
The laser that laser instrument 1 sends is by beam expanding lens 2, slit 3, Amici prism 4, it is by force the parallel laser light beam of I0 that reflective mirror 5 obtains two-beam, by first integral ball device 11.1, second integral ball device 11.2 is collected the outgoing beam of two bundle parallel laser light beams after testing conduit 6 decay, make emergent light be evenly distributed on respectively first integral ball device 11.1, on second integral ball device 11.2, by the first photoelectric cell sensor 7.1, the second photoelectric cell sensor 7.2 detects respectively first integral ball device 11.1, the light intensity at second integral ball device 11.2 exit portal places, the light intensity time t that can obtain two bundle parallel laser light beams light beam after testing conduit 6 decay changes separate signal x (t
1) and y (t
2), this signal is carried out to cross-correlation calculation
Fine particle liquid fixed double phase flow mixed liquor is evenly mixed by micron particles and pure water, therefore particle has subsiding movement in diphasic flow process, so impact causing in order to reduce settlement action as far as possible, the distance that two bundle parallel laser light beams need to be rationally set, general zone of reasonableness is 10mm-18mm.
Fine particle section concentration measuring process is as follows:
1) integrating sphere is detected to the outer wall placement of being close to testing conduit, guarantee that outgoing luminous energy all enters in integrating sphere.After device has all placed, open laser instrument, allow its preheating 40 minutes;
2) after laser instrument has been stablized, the laser intensity while first measuring blank pipe;
3) open liquid fixed double phase flow drive unit, the emergent light intensity of measuring Ear Mucosa Treated by He Ne Laser Irradiation two-phase flow when two-phase flow fluid stable flows through testing conduit in time t changes separate signal x (t1) and y (t2);
4) signal x (t1) and y (t2) are sent in microcomputer (10), this signal is carried out to cross-correlation calculation
Dt obtains time τ
0;
4) be calculated as follows out the mean flow rate of particle in liquid fixed double phase flow
wherein d is the distance of two bundle parallel laser light beams.
Claims (2)
1. based on laser light extinction method, measure a measuring system for passage aisle liquid fixed double phase flow parameter, it is characterized in that comprising laser instrument (1), beam expanding lens (2), slit (3), Amici prism (4), reflective mirror (5), the transparent test pipeline section of liquid-solid pipe with small pipe diameter (6), the first photoelectric cell sensor (7.1), the second photoelectric cell sensor (7.2), photoelectric switching circuit plate (8), data acquisition module (9), microcomputer (10), first integral ball device (11.1), second integral ball device (11.2), a side at the transparent test pipeline section of liquid-solid pipe with small pipe diameter (6) is provided with the Amici prism (4) being connected, reflective mirror (5), opposite side at the transparent test pipeline section of liquid-solid pipe with small pipe diameter (6) is provided with and Amici prism (4), the first integral ball device (11.1) that reflective mirror (5) is corresponding, second integral ball device (11.2), first integral ball device (11.1) is connected with photoelectric switching circuit plate (8) by the first photoelectric cell sensor (7.1), second integral ball device (11.2) is connected with photoelectric switching circuit plate (8) by the second photoelectric cell sensor (7.2), photoelectric switching circuit plate (8), data acquisition module (9), microcomputer (10) is connected in turn, laser instrument (1), beam expanding lens (2), slit (3), Amici prism (4) is connected in turn.
2. right to use requires the measuring method based on laser light extinction method measurement passage aisle liquid fixed double phase flow parameter of system described in 1, it is characterized in that comprising the measuring method of rolling particles section concentration and the measuring method of rolling particles mean flow rate:
1) measuring method of rolling particles section concentration is:
It is by force I that the laser that laser instrument (1) sends obtains two-beam by beam expanding lens (2), slit (3), Amici prism (4), reflective mirror (5)
0parallel laser light beam, by first integral ball device (11.1), second integral ball device (11.2) is collected the outgoing beam of two bundle parallel laser light beams after testing conduit (6) decay, make emergent light be evenly distributed on respectively first integral ball device (11.1, on second integral ball device (11.2), by the first photoelectric cell sensor (7.1), the second photoelectric cell sensor (7.2) detects respectively first integral ball device (11.1), the light intensity at second integral ball device (11.2) exit portal place, can obtain the light intensity I of two bundle parallel laser light beams light beam after testing conduit (6) decay, the caliber of testing conduit (6) is grade, detect first integral ball device (11.1), the diameter of second integral ball device (11.2) is 1 centimetre.
The section concentration of the liquid fixed double phase flow mixing particle in passage aisle
the thickness that wherein L is media particle is pipe diameter size, K is that extinction coefficient can be expressed as K (λ, m, D), wherein λ is optical maser wavelength, the complex index that m is particle, D is the diameter of particle, first the in the situation that of known N, according to above formula, record the relation curve between granule density N and light intensity I, the actual conditions that can record according to experiment come inverting to obtain extinction coefficient K; After recording extinction coefficient K, the particle of every kind of particle diameter is made into respectively to the mixed liquor of variable concentrations, record by experiment the light intensity I of the rear light beam of decay, can calculate the section concentration (N) of particle;
2) measuring method of rolling particles mean flow rate is:
The laser that laser instrument (1) sends is by beam expanding lens (2), slit (3), Amici prism (4), it is by force the parallel laser light beam of I0 that reflective mirror (5) obtains two-beam, by first integral ball device (11.1), second integral ball device (11.2) is collected the outgoing beam of two bundle parallel laser light beams after testing conduit (6) decay, make emergent light be evenly distributed on respectively first integral ball device (11.1), on second integral ball device (11.2), by the first photoelectric cell sensor (7.1), the second photoelectric cell sensor (7.2) detects respectively first integral ball device (11.1), the light intensity at second integral ball device (11.2) exit portal place, the light intensity time t that can obtain two bundle parallel laser light beams light beam after testing conduit (6) decay changes separate signal x (t
1) and y (t
2), this signal is carried out to cross-correlation calculation
obtain in liquid fixed double phase flow grain flow through the time of upstream and downstream sensor τ
0, last because the distance between upstream and downstream light beam (d) is fixed, be calculated as follows out the mean flow rate of particle in liquid fixed double phase flow
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Cited By (8)
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| CN104777326A (en) * | 2014-09-26 | 2015-07-15 | 北京瑞德先飞科技有限公司 | Particle counting instrument with flow speed automatic monitoring and real-time calibration functions |
| CN105527226A (en) * | 2016-01-20 | 2016-04-27 | 浙江大学 | Photoelectric diode array sensor-based ductule gas-liquid two-phase parameter measurement device and method |
| CN105891070A (en) * | 2014-12-12 | 2016-08-24 | 安荣信科技(北京)有限公司 | Automatic calibration device of online continuous monitoring instrument for concentration of particulate matters |
| CN109357982A (en) * | 2018-11-13 | 2019-02-19 | 重庆川仪分析仪器有限公司 | Dust instrument self-checking device |
| CN111307809A (en) * | 2020-02-24 | 2020-06-19 | 浙江大学 | Small pipeline gas-liquid two-phase flow phase distribution optical detection system and method |
| CN113340779A (en) * | 2021-06-03 | 2021-09-03 | 中国人民解放军陆军防化学院 | Explosion simulation experiment substance diffusion calculation method and device and storage medium |
| RU2768214C1 (en) * | 2021-05-17 | 2022-03-23 | Акционерное общество "Государственный научный центр Российской Федерации - Физико-энергетический институт имени А.И. Лейпунского" | Method for hydraulic optimization of flow part of bundle of parallel elements with variable length configuration and device for implementation thereof |
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| CN104777326A (en) * | 2014-09-26 | 2015-07-15 | 北京瑞德先飞科技有限公司 | Particle counting instrument with flow speed automatic monitoring and real-time calibration functions |
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| CN105891070A (en) * | 2014-12-12 | 2016-08-24 | 安荣信科技(北京)有限公司 | Automatic calibration device of online continuous monitoring instrument for concentration of particulate matters |
| CN105527226A (en) * | 2016-01-20 | 2016-04-27 | 浙江大学 | Photoelectric diode array sensor-based ductule gas-liquid two-phase parameter measurement device and method |
| CN106645279B (en) * | 2016-12-06 | 2023-09-01 | 天津商业大学 | Liquid-solid two-phase pulsating flow heat exchange characteristic experimental device |
| CN109357982A (en) * | 2018-11-13 | 2019-02-19 | 重庆川仪分析仪器有限公司 | Dust instrument self-checking device |
| CN109357982B (en) * | 2018-11-13 | 2024-02-09 | 重庆川仪分析仪器有限公司 | Automatic calibrating device for dust meter |
| CN111307809A (en) * | 2020-02-24 | 2020-06-19 | 浙江大学 | Small pipeline gas-liquid two-phase flow phase distribution optical detection system and method |
| CN111307809B (en) * | 2020-02-24 | 2021-01-12 | 浙江大学 | Small pipeline gas-liquid two-phase flow phase distribution optical detection system and method |
| RU2768214C1 (en) * | 2021-05-17 | 2022-03-23 | Акционерное общество "Государственный научный центр Российской Федерации - Физико-энергетический институт имени А.И. Лейпунского" | Method for hydraulic optimization of flow part of bundle of parallel elements with variable length configuration and device for implementation thereof |
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Application publication date: 20140219 |