CN113686953B - Water mist humidity measurement system based on ultrasonic energy loss method - Google Patents
Water mist humidity measurement system based on ultrasonic energy loss method Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 239000003595 mist Substances 0.000 title claims abstract description 81
- 238000005259 measurement Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000000926 separation method Methods 0.000 claims abstract description 21
- 239000000523 sample Substances 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims description 14
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 8
- 230000005284 excitation Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 239000012780 transparent material Substances 0.000 claims description 3
- 239000008235 industrial water Substances 0.000 claims description 2
- 239000000779 smoke Substances 0.000 claims 1
- 238000002474 experimental method Methods 0.000 abstract description 4
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 9
- 238000000889 atomisation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000005514 two-phase flow Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
- G01N29/032—Analysing fluids by measuring attenuation of acoustic waves
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- 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
- G01N15/02—Investigating particle size or size distribution
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
- G01N21/783—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour for analysing gases
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
- G01N21/81—Indicating humidity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/01—Indexing codes associated with the measuring variable
- G01N2291/015—Attenuation, scattering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/024—Mixtures
- G01N2291/02425—Liquids in gases, e.g. sprays
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/02845—Humidity, wetness
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Abstract
The invention provides a water mist humidity measurement system based on an ultrasonic energy loss method, which comprises an adjustable water mist generation device, a measurement section, a temperature sensor, a connecting elbow, a pressure-bearing frame, a connecting pipeline, a steam-water separation device, a vortex street flowmeter, a flow regulating valve, a fan and an ultrasonic measurement device, wherein the middle part of the measurement section is provided with 4 ultrasonic probe placement tube slots, and the water mist generation device comprises an atomizer, atomizing nozzles of different types, a circular container and a high-precision electronic balance; the steam-water separation device comprises a silk screen and a drainage pipeline; the water mist generating device is arranged right below the measuring section, the measuring section is arranged on the lower pressure bearing frame, the connecting elbow is arranged on the measuring section, the connecting pipeline is connected with the connecting elbow, the steam-water separation device is arranged in the middle of the connecting pipeline, the connecting pipeline is connected with the vortex street flowmeter, and the vortex street flowmeter is connected with the fan. The invention is a water mist humidity experiment system which has simple structure and low cost, and can measure the flowing water mist humidity in the space on line, in real time and without interference and with high sensitivity.
Description
Technical Field
The invention relates to a water mist humidity online measurement system based on ultrasonic energy loss under a cold gas-liquid two-phase flow condition, in particular to a water mist humidity online measurement system with a water mist volume concentration capable of being calibrated, which is applied to characteristic research of humidity of water mist with different volume concentrations and energy loss coefficients of ultrasonic waves with different frequencies, and mainly relates to the related technical fields of fire fighting, environmental management, industrial and mining dust removal, medical environment and the like.
Background
The humidity of the two-phase flow has very great influence on the safety and economy of fire engineering, working condition dust removal and agricultural and medical industry, atomization refers to the operation of dispersing liquid into fine water mist particles through an atomizer, a nozzle or high-speed airflow, and the formed superfine water mist particles effectively interact with particles floating in the air, so that gravity sedimentation is realized, and the harm of floating particles in the space to human bodies and the environment is reduced. The spraying effect is closely related to the removal effect of the particulate matter. The mist effect is characterized by parameters such as granularity and concentration in space after atomization, survival time and the like, and the granularity and concentration of the water mist in space are influenced by various factors including the air flow speed in the environment, the speed of water mist particles relative to air flow, the caliber of a nozzle, the spraying pressure, the surface tension coefficient of liquid, the density of air, the viscosity coefficient of liquid, the density of liquid and the like. In order to understand the influence rule of the above factors on atomization, the atomization effect is improved, and the distribution characteristics of atomized water mist particles in space need to be characterized. The energy loss coefficient of ultrasonic waves is related not only to the ultrasonic frequency but also to the humidity of the water mist and the droplet size. At present, various methods for measuring the humidity of water mist exist, such as an oil pool method, a light scattering method and the like, but the measurement accuracy is not high, and the measurement equipment is large in size and cannot realize online measurement. Therefore, it is necessary to design a water mist humidity measurement experiment system with high online measurement sensitivity.
Disclosure of Invention
The invention aims to provide a water mist humidity online measurement system based on an ultrasonic energy loss method, which is a water mist humidity experimental system with simple structure, low price, online measurement, real-time, no interference and high sensitivity.
The purpose of the invention is realized in the following way: the device comprises a water mist generating device, a measuring section, a connecting elbow, a connecting pipeline and a fan which are sequentially connected, wherein a vortex shedding flowmeter and a water outlet are arranged on the connecting pipeline, a steam-water separation device is further arranged between the connecting elbow and the connecting pipeline, four ultrasonic probe placing pipe grooves are symmetrically arranged on the measuring section and are respectively connected with ultrasonic transducers of two different frequencies, an ultrasonic transducer transmitting end and an ultrasonic transducer receiving end are respectively connected with the four ultrasonic probe placing pipe grooves, a temperature sensor is arranged inside the ultrasonic transducer transmitting end and the ultrasonic transducer receiving end, an ultrasonic transducer transmitting probe is connected with an ultrasonic excitation device, a receiving probe is connected with a filter in series, and the ultrasonic transducer transmitting end and the ultrasonic transducer receiving end are connected with a data acquisition system after the series connection.
The invention also includes such structural features:
1. The water mist generating device comprises an atomizer, atomizing nozzles of different types, a circular container and a high-precision electronic balance; the steam-water separation device comprises a silk screen and a drainage pipeline.
2. The connecting pipeline is provided with a section of visible acrylic transparent pipeline, wherein a water mist indicator is placed in the transparent pipeline, and the color of the transparent pipeline changes when meeting water mist.
3. And the measuring section is made of acrylic transparent materials, a laser method and the like are used for measuring the pipe wall liquid film, and meanwhile, whether water mist flows uniformly or not is observed.
4. A sealing ring is arranged between the connecting elbow and the measuring section; the measuring section and the connecting elbow are fixed and tightly sealed through the C-shaped pliers, and the connecting part of the connecting pipeline and other equipment is subjected to sealing fine adjustment through the stainless steel clamp.
Compared with the prior art, the invention has the beneficial effects that: 1) The invention can better observe the movement process of the water mist flowing fluid by utilizing the circular acrylic pipeline. 2) According to the invention, 4 ultrasonic probe tube slots are arranged at the same position in the measuring section, so that the measurement under the same working condition can be more accurately performed by using different ultrasonic frequency probes, and the attenuation characteristic difference of the ultrasonic waves with different frequencies under the same condition can be more accurately mastered. 3) The connecting pipeline provided by the invention has a section of transparent acrylic pipeline combined with the water mist indicator, so that the efficiency of the steam-water separation device can be observed on line in real time, and the filtered gas humidity can be judged according to the color change of the indicator. 4) The invention adopts various high-frequency anti-fog ultrasonic probes to prevent the water fog from forming a film on the ultrasonic probes and interfering the ultrasonic waves. 5) The invention adopts the opposite-jet type ultrasonic transducer, adopts the ultrasonic energy attenuation method to measure the humidity of the water mist, and measures the humidity on line in real time without interference. 6) According to the invention, ultrasonic transducers with different frequencies are adopted to measure at the same position of the measuring section, so that the measurement of the particle size of liquid drops can be more accurate. 7) The water mist generating device can generate water mist with different humidity and different droplet sizes by respectively using the ultrasonic atomizer and the water mist spray head. 8) The water mist generating device is internally provided with a heater, so that water mist with different temperatures can be generated.
Drawings
FIG. 1 is a top view of a measurement section;
FIG. 2 is a front view of a measurement section;
FIG. 3 is a partial cross-sectional view of a left side view of a measurement section;
FIG. 4 is a schematic diagram of a water mist generating system;
FIG. 5 is a schematic view of the elbow connection of the present invention;
FIG. 6 is a diagram of a connection tube visualization channel of the present invention;
FIG. 7 is a perspective view of the experimental setup;
in the figure: the device comprises a water mist generating device 1, a measuring section pipeline 2, a connecting elbow 3, a connecting pipeline 4, a vortex shedding flowmeter 5, a fan 6, a steam-water separation device 7, an ultrasonic transducer transmitting end 8, an ultrasonic transducer receiving end 9, an ultrasonic transducer pipe groove 10, a data acquisition system 11, an atomizing device, a weighing device, a water outlet, an ultrasonic excitation device, a power supply, a filter and an acquisition system.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
The invention comprises an adjustable water mist generating device, a measuring section, a temperature sensor, a connecting elbow, a pressure-bearing frame, a connecting pipeline, a steam-water separation device, a vortex shedding flowmeter, a flow regulating valve, a fan and an ultrasonic measuring device, wherein the middle part of the measuring section is provided with 4 ultrasonic probe placing pipe slots, and the water mist generating device comprises an atomizer, atomizing nozzles of different types, a circular container and a high-precision electronic balance; the steam-water separation device comprises a silk screen and a drainage pipeline; the water mist generating device is arranged right below the measuring section, the measuring section is arranged on the lower pressure bearing frame, the connecting elbow is arranged on the measuring section, the connecting pipeline is connected with the connecting elbow, the steam-water separation device is arranged in the middle of the connecting pipeline, the connecting pipeline is connected with the vortex street flowmeter, and the vortex street flowmeter is connected with the fan.
The centers of the two opposite pipe grooves on the measuring section are completely in a horizontal line; the upper pipe groove of the measuring section and the measuring section are installed in a clamping groove mode, and the ultrasonic transducers with different frequencies can be replaced. The ultrasonic measuring device is provided with a temperature sensor. A sealing ring is arranged between the connecting elbow and the measuring section; the measuring section, the pressure bearing frame and the connecting elbow are fixed and tightly sealed through C-shaped pliers, and the connecting part of the connecting pipeline and other equipment is subjected to sealing fine adjustment through a stainless steel clamp. The ultrasonic transducer also comprises a 60kHz, 100kHz, 160kHz and 200kHz transceiving integrated ultrasonic transducer, an ultrasonic excitation device, a filter and a data acquisition system. The measuring section is respectively provided with two pairs of ultrasonic transducers with different frequencies, the transmitting probe is connected with the ultrasonic excitation device, the receiving probe is connected with the filter in series, and the data acquisition system is connected after the series connection. The connecting pipeline is provided with a section of visible acrylic transparent pipeline, wherein a water mist indicator is placed in the transparent pipeline, and the color of the transparent pipeline changes when meeting water mist. According to the characteristics of the measured water mist working medium, the measuring section is made of acrylic transparent materials, a laser method and the like can be used for measuring a pipe wall liquid film, and meanwhile whether water mist flows uniformly can be observed.
The invention provides an online water mist humidity measuring system based on ultrasonic energy loss under cold-state gas-liquid two-phase flow conditions, and fig. 1 and 7 show the structural composition of an experimental body, wherein the online water mist humidity measuring system comprises a water mist generating device 1, a measuring section pipeline 2, a connecting elbow 3, a connecting pipeline 4, a vortex shedding flowmeter 5, a fan 6, a steam-water separation device 7, an ultrasonic transducer transmitting end 8, an ultrasonic transducer receiving end 9, an ultrasonic transducer pipe groove 10, a data acquisition system 11, an atomizing device, a weighing device, a water outlet, an ultrasonic excitation device, a power supply, a filter and an acquisition system. The water adding mist generating device 1 is provided with a water container, a heater, a graduated scale and an atomization device; the atomizer is a cylinder and is positioned in the center of the water container. The measuring section pipeline 2 is positioned above the water mist generating device 1, 4 ultrasonic transducer pipeline grooves are formed in the middle of the measuring section pipeline, and the ultrasonic transducer pipeline grooves are formed in the front, the back, the left and the right of the measuring section pipeline, and can be simultaneously measured by using ultrasonic probes with different frequencies at the same horizontal position, so that the whole visual effect of the experimental device is ensured while the measuring section serves as a flowing working medium pressure-bearing boundary; the connecting elbow 3 is positioned at the outlet of the pipeline of the measuring section; the sealing ring is positioned between the measuring section pipeline 2 and the connecting elbow 3; the connecting pipeline 4 is positioned at the outlet of the connecting elbow 3, so that the steam-water separation detection of flowing water mist is realized; the vortex shedding flowmeter 5 is positioned behind the connecting pipeline 4 and is used for recording the flow of the water mist humidity measuring device in real time; the fan 6 is connected with the vortex shedding flowmeter 5 and has a multi-gear power adjusting function; the steam-water separation device 7 consists of a steam-water separation filter screen; the ultrasonic transducer transmitting end 8 and the ultrasonic transducer receiving end 9 are arranged on the same horizontal line in a correlation mode through an ultrasonic transducer pipe groove 10 embedded in the measuring section pipe 2, so that the center of the transducer is ensured to be on the same straight line; the data acquisition system 11 consists of a filter and a data acquisition device, and uses a 100M/s high-frequency data acquisition board card to acquire the data, so that the accurate calculation of the energy loss of the ultrasonic wave receiving signal is ensured.
As shown in fig. 2, the upper part of the measuring section pipeline 2 and the connecting elbow 3 are fixedly connected by adopting C-shaped pliers so as to ensure the strength and the tightness of the measuring pipeline. In the pipeline of the measuring section, the experimental working condition of the water mist humidity in the pipeline of the measuring section is changed by adjusting the atomizer and the fan. The temperature sensors are arranged in the ultrasonic transducer transmitting end 8 and the ultrasonic transducer receiving end 9, so that the temperature of the water mist can be acquired. After the ultrasonic wave is emitted by the ultrasonic transducer emitting end 8, the water mist generated by the ultrasonic wave passing through the water mist generating device is collected by the ultrasonic transducer receiving end 9, the temperature of the water mist is collected, and then signals are synchronously transmitted to the filter and data collection system 11 in real time.
In the water mist generating device shown in fig. 4, the water container is provided with scales, the scales can be counted after uniform and stable water mist is generated, and the calibrated water mist liquid volume fraction is obtained according to the liquid volume lost in a period of time and the vortex shedding flowmeter 5. Meanwhile, according to the use of different atomizing devices, water mist with different droplet sizes can be provided for experimental analysis.
The steam-water separation device 7 and the connecting pipeline 4 shown in fig. 7 are connected through stainless steel hoops, and the connecting pipeline 4 is placed in a tangential and inclined downward mode, wherein the connecting elbow 3 and the connecting pipeline 4 are connected through the steam-water separation device 7. A water outlet is arranged in front of the connecting pipeline 4 and the vortex shedding flowmeter 5, so that water filtered by the steam-water separation device 7 flows out of the water outlet along the connecting channel 4, and the flowing water is used for error analysis of water mist humidity calibration in an experiment and can protect a fan.
In summary, the invention provides an online water mist humidity measuring system based on ultrasonic energy loss under the condition of cold gas-liquid two-phase flow in a channel: the device comprises a water mist generating device, a measuring section pipeline, a connecting elbow, a connecting pipeline, a vortex shedding flowmeter, a fan, a steam-water separation device, an ultrasonic transducer transmitting end, an ultrasonic transducer receiving end, an ultrasonic transducer pipe groove, a data acquisition system, an atomizing device, a weighing device, a water outlet, an ultrasonic excitation device, a power supply, a filter and an acquisition system, wherein water mist with different humidity is generated through the cooperation of the water mist generating device and fans with different power, so that the working condition of actual industrial water mist is simulated. And performing measurement on the humidity of the water mist and the particle size of the liquid drops by adopting an ultrasonic energy loss method and an ultrasonic particle size inversion algorithm based on ECAH. For the convenience of experiments, two pairs of ultrasonic transducers with different frequencies are arranged at the same measuring position. The ultrasonic energy loss coefficients of different ultrasonic frequencies are collected under the same environment, and experimental data of waveform and water mist temperature after ultrasonic attenuation are recorded in real time by the collecting system. The synchronization, real-time and non-interference visual measurement of the water mist humidity and the droplet size under different working conditions is realized by combining the inverse algorithm of the ECAH model without the ultrasonic energy attenuation coefficient acquisition under the same water mist condition and the energy loss coefficient acquisition and analysis of the ultrasonic waves with the same frequency under different water mist conditions. The device has the advantages of simple structure, low price, accurate and convenient data acquisition, multiple applicable industrial aspects and wide range of research working conditions.
Claims (2)
1. Water smoke humidity measurement system based on ultrasonic energy loss method, its characterized in that: the device comprises a water mist generating device, a measuring section, a connecting elbow, a connecting pipeline and a fan which are sequentially connected, wherein a vortex shedding flowmeter and a water outlet are arranged on the connecting pipeline, a steam-water separation device is also arranged between the connecting elbow and the connecting pipeline, four ultrasonic probe placing pipe grooves are symmetrically arranged on the measuring section and are respectively connected with two ultrasonic transducers with different frequencies, a temperature sensor is arranged inside a transmitting end of each ultrasonic transducer and a receiving end of each ultrasonic transducer, a transmitting probe of each ultrasonic transducer is connected with an ultrasonic excitation device, a receiving probe of each ultrasonic transducer is connected with a filter in series, and the ultrasonic transducers are connected with a data acquisition system after the ultrasonic transducers are connected in series;
The water mist generating device comprises an atomizer, atomizing nozzles of different types, a circular container and a high-precision electronic balance; the steam-water separation device comprises a silk screen and a drainage pipeline; the connecting pipeline is provided with a section of visible acrylic transparent pipeline, wherein a water mist indicator is placed in the transparent pipeline and changes color when meeting water mist; the measuring section is made of acrylic transparent materials, a laser method is used for measuring a pipe wall liquid film, and meanwhile whether water mist flows uniformly or not is observed; the steam-water separation device, the connecting elbow and the connecting pipeline are connected through a stainless steel clamp, the connecting pipeline is placed in a tangential and oblique downward mode, and a water outlet is arranged in front of the connecting pipeline and the vortex shedding flowmeter; the water mist generating device is matched with fans with different powers to generate water mist with different humidity so as to simulate actual industrial water mist.
2. The ultrasonic energy loss method-based water mist humidity measurement system according to claim 1, wherein: a sealing ring is arranged between the connecting elbow and the measuring section; the measuring section and the connecting elbow are fixed and tightly pressed and sealed through the C-shaped pliers.
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| US4563895A (en) * | 1984-08-20 | 1986-01-14 | Aluminum Company Of America | Apparatus and method for ultrasonic detection of inclusions in molten metals |
| US7306764B2 (en) * | 2003-03-24 | 2007-12-11 | Precision Laminates Inc. | Wetness indicator |
| CN104297112B (en) * | 2014-11-05 | 2016-08-24 | 上海理工大学 | The measuring method of a kind of wet-steam region droplet particles and device |
| CN104458904B (en) * | 2014-12-08 | 2017-03-15 | 北京航空航天大学 | A kind of detection means of the pipe with small pipe diameter air-flow two phase flow for spacecraft propulsion agent filling |
| US10871418B2 (en) * | 2015-05-12 | 2020-12-22 | Croda, Inc. | Method of analyzing spray particulates through a transparent sidewall |
| CN104952326B (en) * | 2015-07-15 | 2018-07-27 | 成都理工大学 | Two-layered medium water-air two phase flows analogue experiment installation and its application method |
| JP2017194347A (en) * | 2016-04-20 | 2017-10-26 | アズビル株式会社 | Dryness measuring device and wet steam inspection device |
| CN108613973B (en) * | 2018-04-17 | 2020-11-03 | 西南交通大学 | Microfluidic two-phase droplet flow method and device for simple and rapid detection of urea |
| CN108896453B (en) * | 2018-06-21 | 2021-03-23 | 天津大学 | A Multi-parameter Adjustable Mist Flow Experiment System |
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| 汽轮机湿蒸汽特性的超声衰减测量技术;祝嘉鸿 等;哈尔滨工程大学学报;20220625;第43卷(第8期);第1199-1204页 * |
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