CN202255615U - Device for measuring sound speed of gas and liquid two-phase flow - Google Patents
Device for measuring sound speed of gas and liquid two-phase flow Download PDFInfo
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- CN202255615U CN202255615U CN2011202671712U CN201120267171U CN202255615U CN 202255615 U CN202255615 U CN 202255615U CN 2011202671712 U CN2011202671712 U CN 2011202671712U CN 201120267171 U CN201120267171 U CN 201120267171U CN 202255615 U CN202255615 U CN 202255615U
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Abstract
The utility model discloses a device for measuring the sound speed of gas and liquid two-phase flow. The device comprises a liquid supply system, a gas supply system, a gas and liquid mixer, a heat conduction pipeline, a pipeline heating system, a disturbance wave generator, a measuring pipeline with a heat insulation function, three pressure sensors, an electrode pair, a gas content closed loop control system, a gas and liquid separation system and a data acquisition and analysis system. Any measuring device consisting of the parts can be used for measuring the sound speed and the flow speed of the gas and liquid two-phase flow, the gas content, the dispersivity and the influence of temperature on the sound speed.
Description
Technical field
The present invention relates to the fluid measurement field, is a kind of velocity of sound of measurement of gas liquid two-phase, just the device of pressure-wave propagation speed in the measurement of gas liquid two-phase.
Background technology
The mobile of biphase gas and liquid flow is modal complicated phenomenon on the engineering.The velocity of sound in the fluid is meant pressure-wave propagation speed in the fluid, and the small sample perturbations that promptly takes place in a certain zone of fluid propagates into other regional velocity of propagation.The velocity of sound of monophasic fluid is to reduce along with the compressible raising of fluid.The sound scooter 1500m/s in the water for example, and the velocity of sound of air is about 340m/s.In biphase gas and liquid flow, because the mutual blending of two-phase medium, the compressibility that causes gas-liquid mixture is much smaller than the compressibility of single-phase composition wherein, so the very big decline of the velocity of sound in the biphase gas and liquid flow.On the engineering; For example in the fields such as arrangement of the tissue of the Safety Design of nuclear reactor, spray burning process, oil gas conveying pipe; All need consider the velocity of sound problem of biphase gas and liquid flow, because the pressure-wave propagation characteristic of biphase gas and liquid flow has crucial effect to above-mentioned engineering problem.
The main flow parameter that influences the velocity of sound of biphase gas and liquid flow has: the flowing velocity of fluid, gas content, dispersivity, temperature.For accurately obtaining the pressure-wave propagation characteristic of biphase gas and liquid flow under above-mentioned flow parameter, need a kind ofly can measure the device of above-mentioned factor simultaneously to the influence of the velocity of sound of biphase gas and liquid flow.
Summary of the invention
The device that the purpose of this invention is to provide a kind of velocity of sound of measurement of gas liquid two-phase; It comprises a liquid-supplying system, a gas supply system, an air and liquid mixer, a heat transfer pipe, a pipeline heating system, a perturbation wave generator, the measuring channel with adiabatic function; Three pressure transducers, an electrode pair, the closed-loop control system of a gas content, Separate System of Water-jet and data acquisition and analysis system.The measurement mechanism of forming by above-mentioned parts can the measurement of gas liquid two-phase the velocity of sound, and Two-phase flow speed, gas content, dispersivity, temperature are to the influence of the velocity of sound.
The technical scheme that the present invention adopts:
Fig. 1 is the layout of device of the velocity of sound of measurement of gas liquid two-phase.As shown in fig. 1, the liquid of two-phase flow is provided by liquid-supplying system, and the speed of fluid is controlled by the liquid pump in the liquid-supplying system.Gas is provided by gas supply system.Liquid, gas get into air and liquid mixer fully to be mixed.The cavity of air and liquid mixer is cylindrical; At least three layers of wire netting that stainless steel is processed are installed along axis direction in the inside; Cylindrical top surface is the liquid inlet, and the opposite is the two-phase flow outlet, and gas gets into from the aperture of right cylinder periphery; Liquids and gases form the homogeneous biphase gas and liquid flow through evenly mixing behind the hole of wire netting.Wherein the content of gas is regulated through the automatically controlled air throttle in the air supply system according to the proportioning of flow of liquid value, gas stream value.Two-phase flow gets into heat transfer pipe, and the temperature according to setting is heated it by the pipeline heating system, up to reaching predetermined temperature.Before or after heat transfer pipe, be connected with the perturbation wave generator, the perturbation wave generator is a reciprocating piston mechanism standard sine wave that can produce frequency adjustable, that dragged by servomotor.Produce the standard sine wave of frequency adjustable,, import the measuring channel with adiabatic function of back into as perturbation wave.In this stage, it is constant that temperature is considered to.Heat transfer pipe and measuring channel all are that xsect is circular slender pipeline.Three pressure transducers are installed on the wall of measuring channel.Flow path direction always, three pressure transducers be labels 1,2,3 respectively.Equidistant each other.No. 2 is central presser sensor,, be called as the upstream and downstream pressure transducer respectively No. 1 and No. 3.Be installed in the opposite No. 2 No. 1 and No. 3.No. 2 the pressure transducer right opposite is installed an electrode pair.1,2, No. 3 sensors are used for measuring the pressure of three points, and electrode pair is used for measuring local gas content.Electrode pair needs to demarcate before measurement, obtains the relation curve of output voltage and gas content.Because the heating process of heat transfer pipe can make the gas content in the measuring channel change, depart from the gas content that automatically controlled air throttle configures.This point can be through electrode pair measured value with whether reflect consistent with setting value.If deviation is arranged, the closed-loop control system of a gas content can be passed through automatically controlled air throttle, further adjusts gas flow, up to the deviation of the gas content value of electrode pair and setting value in error range.The measuring channel downstream connect a Separate System of Water-jet, and separated liquid is got back to liquid-supplying system.
All data are through data collection and analytic system collection, analyzing and processing.Force value to three diverse locations is carried out the FFT conversion, can extrapolate the local velocity of sound of two-phase flow through correlation analysis and spectrum analysis method.
Advantage of the present invention:
The apparatus structure of the velocity of sound of the measurement of gas liquid two-phase that the present invention proposes is simple, practical, easy to use, powerful.On this device; Flowing velocity, gas content, dispersivity, four parameters of temperature can be measured respectively the influence of the velocity of sound of biphase gas and liquid flow; Consider the influence of wherein any parameter independently, also can take all factors into consideration the influence of each parameter, carry out cross-over experiment.
Description of drawings
The layout of the device of the velocity of sound of Fig. 1 measurement of gas liquid two-phase;
Among the figure; The measuring channel that 1 liquid-supplying system, 2 flow of liquid, 3 gas supply systems, 4 gas streams, 5 air and liquid mixers, 6 pipeline heating systems, the closed-loop control system of 7 gas contents, 8 electrode pairs, 9 downstream pressure sensors, 10 have adiabatic function, 11 Separate System of Water-jet and data acquisition and analysis system, 12 central presser sensor, 13 backwater, 14 perturbation wave generators, 15 heat transfer pipes.
The layout of the device of the velocity of sound in Fig. 2 Measurement of Air-water two-phase flow;
Among the figure, the measuring channel, 12 data acquisition and analysis systems, 13 control computer, 14 backwater, 15 central presser sensor, 16 Separate System of Water-jet, 17 downstream pressure sensors, 18 platinum electrodes that 1 water tank, 2 pipeline heating systems, 3 air and liquid mixers, 4 flowmeters, 5 automatically controlled throttling valve, 6 water collecting basins, 7 liquid pumps, 8 current, 9 heat transfer pipes, 10 perturbation wave generators, 11 have an adiabatic function is to, the closed-loop control system of 19 gas contents, 20 compressed pneumatic pumps, 21 automatically controlled air throttles, 22 gas meters, 23 temperature sensors, 24 pressure monitor sensors, 25 airflows.
The structural representation of Fig. 3 air and liquid mixer;
Among the figure, the mouth that the aperture of the periphery that 1 circular cylindrical cavity, the 2 entering mouths of a river, 3,4 air get into, 5 three-layer metal nets, 6 two-phase flows flow out.
The fundamental diagram of Fig. 4 disturbance generator;
Among the figure, 1 servomotor drags, 2 reciprocating piston mechanisms, measuring channel
Fig. 5 pressure transducer and the electrode pair scheme of installation on measuring channel;
Among the figure, 1 measuring channel, 2 upper reaches (No. 1) pressure transducer, 3 downstream (No. 3) pressure transducer, 4 platinum electrodes are to, 5 centers (No. 2) pressure transducer.
Embodiment
Further specify the structure and the principle of device of the velocity of sound of a kind of measurement of gas liquid two-phase that the present invention proposes with a specific embodiments.It specifically is the device of the pressure-wave propagation speed in an air-water two-phase flow.
Fig. 2 is the layout of the device of the velocity of sound in Measurement of Air-water two-phase flow.As shown in Figure 2, the water in the two-phase flow is provided by liquid-supplying system.Comprise parts such as the water tank of a level altitude, ground water collecting basin, liquid pump, flowmeter, automatically controlled throttling valve in this system.The speed of fluid is controlled by the liquid pump in the liquid-supplying system.Air is provided by gas supply system.This system comprises parts such as compressed pneumatic pump, gas meter, automatically controlled air throttle, temperature sensor.Water, air get into air and liquid mixer fully to be mixed, and forms homogeneous air-water two-phase flow.Fig. 3 is the structural representation of air and liquid mixer.The air and liquid mixer inner chamber is cylindrical, along its axis direction the three-layer metal net is installed.Along its axis promptly is the mouth that water gets into, two-phase flow flows out.Air gets into from the aperture of periphery.The content of its air is regulated through the automatically controlled air throttle in the air supply system according to the proportioning of the flow value of the flow value of water, air.The content of air can be from 0 (pure water) to 100% (pure air).The value of temperature sensor is used for the density value of correction air.
Air and liquid mixer connects heat transfer pipe, and heat transfer pipe is by the higher material of heat transfer coefficient, and stainless steel material is processed.After air-water two-phase flow got into heat transfer pipe, the temperature according to setting was heated it by the pipeline heating system, up to reaching predetermined temperature.The pipeline heating system adopts the great-power electromagnetic well heater.After heat transfer pipe, be connected with the perturbation wave generator, produce the standard sine wave of frequency adjustable.Fig. 4 is the fundamental diagram of disturbance generator.Sinusoidal wave by the reciprocating piston mechanism acquisition that drags by servomotor through.If do not consider the dispersivity of the velocity of sound of two-phase flow, promptly the velocity of sound does not then start the disturbance generator to the extent of reaction of forcing frequency.Sinusoidal wave as perturbation wave, import the measuring channel with adiabatic function of back into.
In the measuring channel stage, it is constant that temperature is considered to.Material adopts the lower organic glass of heat transfer coefficient.Heat transfer pipe and measuring channel and xsect all be circular elongated tubular, and equal diameters.The ratio of water back and measuring channel sum and pipe diameter is greater than 10; Purpose be the wavelength that makes the velocity of sound in air-water two-phase flow much larger than diameter; Can guarantee like this pressure wave only along the axial propagation of measuring channel, guaranteeing to flow is the prerequisite hypothesis that one dimension flows.
Three pressure transducers are installed on the wall of measuring channel.Flow path direction always, three pressure transducers be labels 1,2,3 respectively.Equidistant each other.No. 2 is central presser sensor, is called as the upstream and downstream pressure transducer respectively No. 1 and No. 3.Be installed in the opposite No. 2 No. 1 and No. 3.No. 2 the pressure transducer right opposite is installed the electrode pair that platinum is processed, and measuring junction is deep in the measuring channel, but is no more than the central axis of measuring channel.Fig. 5 is pressure transducer and the scheme of installation of electrode pair on measuring channel.Sensor 1,2 is used for measuring the pressure of three points No. 3, and electrode pair is used for measuring local air content.Electrode pair needs to demarcate the output voltage of acquisition and the relation curve of air content before measurement.
Because the air content that the heating process of heat transfer pipe can make automatically controlled air throttle configure changes, whether the measured value that this point can be passed through with reflect consistent with setting value.If deviation is arranged, the closed-loop control system of a gas content can further be adjusted gas flow through driving automatically controlled air throttle, up to the gas content value of electrode pair and setting value in error range.If account temperature is not to the influence of the velocity of sound, can not start the pipeline heating system, carry out the acoustic velocity measutement test at ambient temperature.
The measuring channel downstream Separate System of Water-jet that links to each other.This system utilizes centrifugal force to decompose empty G&W, and water is got back in the water collecting basin of liquid-supplying system and recycled.
All data are handled through an analytic system collection analysis.Force value to three diverse locations of obtain is carried out the FFT conversion, can extrapolate the velocity of sound of the locality of air-water two-phase flow under certain flowing velocity, certain air content, certain temperature through correlation analysis and spectrum analysis method.
Claims (7)
1. the device of the velocity of sound of a measurement of gas liquid two-phase, the liquid of two-phase flow is provided by liquid-supplying system, and gas is provided by gas supply system; Liquid, gas get into air and liquid mixer and form the homogeneous biphase gas and liquid flow; Two-phase flow gets into heat transfer pipe, by the pipeline heating system it is heated, and before or after heat transfer pipe, is connected with the perturbation wave generator; Three pressure transducers are installed on the wall of measuring channel; The pressure transducer right opposite that is positioned at the center is installed an electrode pair; The gas content closed-loop control system is through automatically controlled air throttle adjustment gas flow; The measuring channel downstream connect a Separate System of Water-jet.
2. the device of the velocity of sound of a kind of measurement of gas liquid two-phase according to claim 1 is characterized in that, the cavity of a described air and liquid mixer is cylindrical, and at least three layers of wire netting that stainless steel is processed are installed along axis direction in the inside; In cylindrical top surface is the liquid inlet, and the opposite is the two-phase flow outlet, and gas gets into from the aperture of right cylinder periphery.
3. the device of the velocity of sound of a kind of measurement of gas liquid two-phase according to claim 1 is characterized in that, described perturbation wave generator is a reciprocating piston mechanism standard sine wave that can produce frequency adjustable, that dragged by servomotor.
4. the device of the velocity of sound of a kind of measurement of gas liquid two-phase according to claim 1 is characterized in that, described heat transfer pipe is processed by stainless steel material, is that cross-sectional area is round elongated tubular.
5. the device of the velocity of sound of a kind of measurement of gas liquid two-phase according to claim 1 is characterized in that, described measuring channel with adiabatic function is processed by pmma material, is that cross-sectional area is round elongated tubular.
6. the device of the velocity of sound of a kind of measurement of gas liquid two-phase according to claim 5 is installed on the wall of measuring channel along the axis direction of measuring channel in proper order, and is equidistant each other, and middle sensor is positioned at two other opposite.
7. the device of the velocity of sound of a kind of measurement of gas liquid two-phase according to claim 6, said electrode pair is deep in the measuring channel, but is no more than the central axis of measuring channel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202671712U CN202255615U (en) | 2011-07-27 | 2011-07-27 | Device for measuring sound speed of gas and liquid two-phase flow |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011202671712U CN202255615U (en) | 2011-07-27 | 2011-07-27 | Device for measuring sound speed of gas and liquid two-phase flow |
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| CN202255615U true CN202255615U (en) | 2012-05-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014029070A1 (en) * | 2012-08-21 | 2014-02-27 | Lu Ming | Apparatus for measuring sound velocity of gas-liquid two-phase flow |
| CN108197377A (en) * | 2017-12-27 | 2018-06-22 | 中国石油化工股份有限公司江汉油田分公司勘探开发研究院 | The critical flow calculation methodologies of gas-liquid two-phase throttling and device |
| CN112000138A (en) * | 2020-08-31 | 2020-11-27 | 北京七星华创流量计有限公司 | Gas mass flow controller |
| CN115060796A (en) * | 2022-06-24 | 2022-09-16 | 西南石油大学 | Ultrasonic joint detection method for flow velocity and gas content of full-pipe multiphase drilling fluid |
-
2011
- 2011-07-27 CN CN2011202671712U patent/CN202255615U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014029070A1 (en) * | 2012-08-21 | 2014-02-27 | Lu Ming | Apparatus for measuring sound velocity of gas-liquid two-phase flow |
| CN108197377A (en) * | 2017-12-27 | 2018-06-22 | 中国石油化工股份有限公司江汉油田分公司勘探开发研究院 | The critical flow calculation methodologies of gas-liquid two-phase throttling and device |
| CN108197377B (en) * | 2017-12-27 | 2021-08-03 | 中国石油化工股份有限公司 | Gas-liquid two-phase throttling critical flow calculation method and device |
| CN112000138A (en) * | 2020-08-31 | 2020-11-27 | 北京七星华创流量计有限公司 | Gas mass flow controller |
| CN112000138B (en) * | 2020-08-31 | 2024-01-09 | 北京七星华创流量计有限公司 | Gas mass flow controller |
| CN115060796A (en) * | 2022-06-24 | 2022-09-16 | 西南石油大学 | Ultrasonic joint detection method for flow velocity and gas content of full-pipe multiphase drilling fluid |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20130727 |