WO2010134148A1 - 二相流励振力評価方法及び二相流励振力評価装置 - Google Patents
二相流励振力評価方法及び二相流励振力評価装置 Download PDFInfo
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- WO2010134148A1 WO2010134148A1 PCT/JP2009/006990 JP2009006990W WO2010134148A1 WO 2010134148 A1 WO2010134148 A1 WO 2010134148A1 JP 2009006990 W JP2009006990 W JP 2009006990W WO 2010134148 A1 WO2010134148 A1 WO 2010134148A1
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- phase flow
- excitation force
- force evaluation
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- potential difference
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/017—Inspection or maintenance of pipe-lines or tubes in nuclear installations
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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
- 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
- G01N29/04—Analysing solids
- G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/02—Devices or arrangements for monitoring coolant or moderator
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
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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
- G01N2291/021—Gases
- G01N2291/0215—Mixtures of three or more gases, e.g. air
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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
- G01N2291/02433—Gases in liquids, e.g. bubbles, foams
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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
- G01N2291/02836—Flow rate, liquid level
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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
- G01N2291/26—Scanned objects
- G01N2291/263—Surfaces
- G01N2291/2634—Surfaces cylindrical from outside
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/02—Devices or arrangements for monitoring coolant or moderator
- G21C17/022—Devices or arrangements for monitoring coolant or moderator for monitoring liquid coolants or moderators
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D1/00—Details of nuclear power plant
- G21D1/006—Details of nuclear power plant primary side of steam generators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Definitions
- the present invention relates to a two-phase flow excitation force evaluation method and a two-phase flow excitation force evaluation apparatus that evaluate excitation force acting on a plurality of tubes arranged to intersect a two-phase flow.
- the primary cooling water is circulated between the core and the steam generator in a pressurized state, and the heat of the primary cooling water is transferred to the secondary cooling water by the steam generator. And produce steam.
- the steam generator a plurality of pipes for circulating the primary cooling water circulating between the core and the steam generator are bent in a U shape and arranged. Then, since the secondary cooling water is filled around these pipes, heat is transferred from the primary cooling water to the secondary cooling water through the pipes, and the secondary cooling water evaporates and is vaporized. Will be generated.
- the U-shaped pipe line disposed in the steam generator is vibrated by the primary cooling water flowing through the inside of the steam generator, and also excited from the secondary cooling water that boils and flows as a two-phase flow. Vibrate in response.
- the void fraction of the two-phase flow can be obtained by arranging electrodes on the inner surface and the central portion of the flow path through which the two-phase flow flows, and measuring the voltage generated between these electrodes.
- the vibration characteristics of the pipe line can be obtained by measuring the displacement caused by the vibration of the pipe line by the displacement sensor or measuring the stress caused by the vibration of the pipe line by the stress sensor.
- the equipment for measuring the void fraction of the two-phase flow in the flow passage through which the two-phase flow flows and the equipment for vibrating the pipe line and measuring the vibration must be provided independently at different positions. For this reason, there existed a problem that the whole apparatus including a flow path will enlarge, and installation will take time. In addition, since it is necessary to provide at different positions, it is necessary to synchronize the measurement result of the measured void fraction of the two-phase flow and the measurement result of the vibration of the corresponding pipe line. There was a problem that took.
- the present invention has been made in view of the above-described circumstances, and is a two-phase flow excitation force evaluation that can easily and accurately evaluate an excitation force that acts on a tubular body with a simple configuration.
- a method and a two-phase flow excitation force evaluation apparatus are provided.
- the present invention employs the following means in order to solve the above problems.
- the present invention is a two-phase flow excitation force evaluation method for evaluating an excitation force acting on a plurality of tubes disposed so as to intersect a flow of the two-phase flow from the two-phase flow flowing in the flow part.
- at least one part of the surface of the tube is made of a material that can conduct electricity, and the tube is displaced in a state where the tube is vibrated by the vibration generating means.
- the stress is measured, and the void fraction of the two-phase flow flowing in the vicinity of the tubular body is measured based on a potential difference between a potential at a predetermined position on the surface of the tubular body and a reference potential.
- the present invention is a two-phase flow excitation force evaluation device that evaluates an excitation force acting on a plurality of tubes disposed so as to intersect the flow of the two-phase flow from the two-phase flow flowing in the flow part.
- the two-phase flow excitation force evaluation device is configured as one of a plurality of the tube bodies, and at least a part of the surface thereof is formed of a conductive material, and vibration generating means for vibrating the vibration tube And an excitation force evaluating means for measuring displacement or stress of the vibrating tube, and a void ratio of the two-phase flow flowing in the vicinity of the vibrating tube based on a potential difference between a potential at a predetermined position on the surface of the vibrating tube and a reference potential And a void ratio measuring means for measuring the above.
- the vibrating tube which is one of the tubes arranged so as to intersect the flow of the two-phase flow, vibrates by the vibration generating means, and the two-phase as a reaction force of the vibration. Excited by the exciting force acting from the flow.
- the void fraction of the two-phase flow that flows in the vicinity of the excitation force acting on the vibration tube is based on the potential difference between the potential at a predetermined position on the surface of the vibration tube and the reference potential, which is a material that can conduct at least part of the surface. Measured.
- the excitation force acting on the vibrating tube is evaluated by measuring the displacement or stress of the excited vibrating tube.
- both the void fraction of the two-phase flow and the excitation force acting on the tube are measured using equipment that is independent of each other by using a vibrating tube made of a material that allows at least part of the surface to conduct. It is possible to measure integrally without being done. For this reason, the entire apparatus can be easily installed with a simple configuration with a minimum number of members, without being enlarged, and can be accurately measured in association with each other.
- the velocity of the two-phase flow is further measured, and based on the measured void ratio and velocity of the two-phase flow and the displacement or stress of the tube, It is preferable to determine the critical flow velocity for each rate.
- the two-phase flow excitation force evaluation apparatus preferably includes two-phase flow velocity measuring means for measuring the velocity of the two-phase flow. Furthermore, in the two-phase flow excitation force evaluation apparatus, the two-phase flow velocity measured by the two-phase flow velocity measuring means, the void ratio of the two-phase flow measured by the void ratio measuring means, and It is preferable to provide a critical velocity analysis unit that obtains a critical velocity for each void ratio based on the displacement or stress of the vibrating tube measured by the excitation force evaluation means.
- the velocity of the two-phase flow is further measured. For this reason, the critical flow velocity for each void ratio can be obtained based on the measured velocity and void ratio of the two-phase flow and the displacement or stress of the vibrating tube.
- the void ratio of the two-phase flow is preferably obtained by measuring a potential difference between two points on the surface of the tubular body.
- the void ratio measurement means includes a pair of first electrodes provided on the surface of the vibration tube with a space between each other, and the pair of first electrodes. It is preferable to have a first voltage measurement unit that detects a potential difference and a void rate analysis unit that calculates a void ratio based on the potential difference detected by the first voltage measurement unit.
- the potential difference between two points that are spaced apart from each other on the surface of the vibrating tube changes depending on the void fraction of the two-phase flow that flows in the vicinity thereof. By doing so, the void ratio can be obtained.
- a potential difference between two other points at different positions in the flow direction of the two-phase flow is further measured on the surface of the tubular body, It is preferable to obtain the local velocity of the two-phase flow that flows in the vicinity of the tubular body by the phase difference of the waveform of the potential difference to be measured.
- the pair of first electrodes and the pair of second electrodes are spaced from each other at different positions in the flow direction of the two-phase flow on the surface of the vibrating tube.
- a local velocity measuring means configured by a local velocity analyzing unit for obtaining a local velocity of the two-phase flow flowing in the vicinity of the vibrating tube by a phase difference between the waveform of the potential difference and the waveform of the potential difference detected by the second voltage measuring unit; It is preferable to provide.
- the change in the void ratio can be measured as a waveform of the potential difference by measuring the potential difference between the two points.
- the waveform of the potential difference is out of phase by the amount displaced in the two-phase flow direction. Will be detected. For this reason, the local velocity of the two-phase flow that flows in the vicinity of the vibrating tube can be obtained by measuring the phase difference of the waveform of the potential difference.
- the void ratio of the two-phase flow may be obtained by measuring a potential difference between the surface of the tubular body and the inner surface of the flow part.
- the void ratio measuring means includes an electrode provided on the inner surface of the flow portion so as to face the surface of the vibrating tube, and a potential difference between the vibrating tube and the electrode. It is also possible to have a voltage measurement unit that detects the above and a void rate analysis unit that calculates the void rate based on the potential difference detected by the voltage measurement unit.
- the void ratio is measured by measuring the potential difference. Can be requested.
- the two-phase flow excitation force evaluation method of the present invention by using one of the vibrating tubes, the void ratio of the two-phase flow is measured and the displacement or stress of the tube is measured. With the configuration, it is possible to easily and accurately evaluate the excitation force acting on the pipe body from the two-phase flow.
- the two-phase flow excitation force evaluation apparatus of the present invention using a vibrating tube that is one of the vibrating tubes, the void fraction of the two-phase flow is measured and the displacement or stress of the tube is measured. By doing so, it is possible to evaluate the excitation force acting on the pipe body from the two-phase flow easily and accurately with a simple configuration.
- the two-phase flow excitation force evaluation apparatus of the 1st Embodiment of this invention it is a schematic diagram which shows the detail of a vibration tube. It is a graph which shows the electric potential difference measured by the 1st voltage measurement part and the 2nd voltage measurement part in the two-phase flow excitation force evaluation apparatus of the 1st Embodiment of this invention.
- the two-phase flow excitation force evaluation apparatus according to the first embodiment of the present invention it is a graph showing the relationship between the displacement of the vibrating tube and the two-phase flow velocity analyzed by the limit velocity analysis unit.
- the two-phase flow excitation force evaluation apparatus 1 of the present embodiment includes a circulation part 2 that circulates a two-phase flow F that serves as a model, and the two-phase flow F in the circulation part 2.
- a plurality of tubes 3 arranged so as to be orthogonal to the flow direction X, an excitation means 4 for vibrating the tube 3, an excitation force evaluation means 5 for measuring the displacement of the vibrating tube 3, and two-phase A void ratio measuring means 6 for measuring the void ratio of the flow F and a two-phase flow velocity measuring means 7 for measuring the velocity V of the two-phase flow F are provided.
- the two-phase flow F is, for example, a model of boiled secondary cooling water in the evaporator, and is composed of alcohol and sulfur hexafluoride gas.
- a supply unit for supplying the liquid and gas constituting the two-phase flow F is provided on the upstream side in the flow direction X.
- one of the tubes 3 is configured as a vibrating tube 3 ⁇ / b> A that is vibrated by the vibration generating means 4.
- the vibrating tube 3A is formed of a metal material so that electricity can be conducted.
- the vibration generating means 4 is composed of, for example, a solenoid, and can vibrate the vibrating tube 3A with a desired amplitude and frequency that simulate vibrations received by the fluid flowing through the inside.
- the excitation force evaluation means 5 includes a displacement sensor 5a that measures displacement in a direction orthogonal to the extending direction of the vibration tube 3A.
- the vibrating tube 3A vibrates with an amplitude corresponding to the magnitude of the excitation force from the two-phase flow F. Therefore, the excitation force can be accurately evaluated by measuring the vibration amplitude of the vibration tube 3A by the displacement sensor 5a.
- the void ratio measuring means 6 includes a pair of first electrodes 10 and 11 provided at two points spaced along the flow direction X on the surface of the vibration tube 3A, and one of the first electrodes 10 and 11.
- a first voltage measurement unit 12 that measures a potential difference as a reference and a void rate analysis unit 13 that calculates a void rate based on the potential difference detected by the first voltage measurement unit 12 are provided.
- the void ratio measuring means 6 includes a pair of terminals 13 and 14 provided on the surface of the vibration tube 3A so as to sandwich the pair of first electrodes 10 and 11 between the pair of terminals 13 and 14. And a constant current portion 15 for supplying a predetermined current.
- the void rate analyzing unit 13 uses the two potentials flowing in the vicinity based on the potential difference. The void fraction of the phase flow F can be obtained.
- FIG. 3 shows the potential difference measured by the first voltage measurement unit 12 as (a), and the potential difference measured by the second voltage measurement unit 18 as (b). Then, the local velocity analysis unit 19 extracts a time difference ⁇ T that is a phase difference between the waveform of the potential difference detected by the first voltage measurement unit 12 and the waveform of the potential difference detected by the second voltage measurement unit 18. .
- the position where the pair of first electrodes 10, 11 is installed and the position where the pair of second electrodes 16, 17 are installed are different in position along the flow direction X of the two-phase flow F. . Therefore, the two-phase flow F detected by the pair of first electrodes 10 and 11 on the upstream side is detected by the pair of second electrodes 16 and 17 on the downstream side with a time difference ⁇ T corresponding to the velocity V. .
- the local velocity analysis unit 19 extracts the phase difference between the waveform of the potential difference detected by the first voltage measurement unit 12 and the waveform of the potential difference detected by the second voltage measurement unit 18, and a pair of first It is possible to determine the velocity V of the two-phase flow F that flows in the vicinity from the distance between the electrodes 10 and 11 and the pair of second electrodes 16 and 17. Therefore, the local velocity analysis unit 19, the pair of first electrodes 10 and 11, the first voltage measurement unit 12, the pair of second electrodes 16 and 17, the second voltage measurement unit 18, the pair of terminals 13, 14 and the constant current unit 15 constitute a local velocity measuring means 20 for obtaining a local velocity V1 of the two-phase flow F flowing in the vicinity of the vibrating tube 3A.
- the two-phase flow velocity measuring means 7 is provided on the upstream side of the group of tube bodies 3 in the present embodiment, and a pair of third electrodes 21 provided at each of two locations different in the flow direction X. 22, a pair of fourth electrodes 23, 24, a third voltage measuring unit 25 for measuring a potential difference generated in the two-phase flow F between the pair of third electrodes 21, 22, and between the pair of fourth electrodes 23, 24 A speed at which the velocity V of the two-phase flow F is calculated from the measurement results of the fourth voltage measurement unit 26 that measures the potential difference generated in the two-phase flow F, and the third voltage measurement unit 25 and the fourth voltage measurement unit 26.
- a calculation unit 27 is included.
- the position where the pair of third electrodes 21 and 22 is installed and the position where the pair of fourth electrodes 23 and 24 are installed are different in position along the flow direction X of the two-phase flow F. . Accordingly, the two-phase flow F detected by the pair of third electrodes 21 and 22 on the upstream side is detected by the pair of fourth electrodes 23 and 24 on the downstream side with a time difference corresponding to the velocity V.
- the speed calculation unit 27 extracts the phase difference between the waveform of the potential difference detected by the third voltage measurement unit 25 and the waveform of the potential difference detected by the fourth voltage measurement unit 26, and the pair of third electrodes
- the average velocity V of the two-phase flow F flowing through the circulation part 2 can be obtained from the separation distance between the pair 21 and 22 and the pair of fourth electrodes 23 and 24.
- the void fraction of F is input to the limit speed analysis unit 28.
- the limit speed analysis unit 28 plots the relationship between the displacement of the vibration tube 3A corresponding to each other and the speed V of the two-phase flow F, and obtains the limit speed Vc from the correlation between the two.
- the critical velocity analysis unit 28 plots the relationship between the displacement of the vibrating tube 3 ⁇ / b> A and the velocity V of the two-phase flow F for each segment of the void fraction of the input two-phase flow F.
- a void rate analysis unit 13 in the void rate measurement unit 6, a local velocity analysis unit 19 in the local velocity measurement unit 20, a velocity calculation unit 27 in the two-phase flow velocity measurement unit 7, and a limit velocity analysis unit. 28 is configured integrally as an analysis device 30.
- a two-phase flow F as a model is circulated through the circulation section 2 and the tube 3 disposed so as to intersect the flow of the two-phase flow F is included.
- One vibrating tube 3 ⁇ / b> A is vibrated by the vibrating means 4.
- the vibrating tube 3A is excited by an excitation force acting from the two-phase flow F flowing around it.
- the displacement associated with the vibration of the vibrating tube 3 ⁇ / b> A is measured by the excitation force evaluating means 5, and the void ratio of the two-phase flow F flowing in the vicinity is measured by the void ratio measuring means 6.
- the local velocity V1 is measured by the local velocity measuring means 20.
- the velocity V of the two-phase flow F supplied to the circulation unit 2 is measured by a two-phase flow F measuring unit.
- the critical velocity analysis unit 28 obtains the critical flow velocity Vc for each void rate segment.
- the void fraction of the two-phase flow F and the excitation force acting on the tube body 3 are measured by using the vibration tube 3A formed of a conductive metal material, and are measured with facilities independent from each other. And can be measured integrally. For this reason, the entire apparatus can be easily installed with a simple configuration with a minimum number of members, without being enlarged, and can be accurately measured in association with each other. For this reason, as a simple configuration, the excitation force acting on the tube 3 from the two-phase flow F can be evaluated easily and accurately.
- the local velocity V1 of the two-phase flow F that flows in the vicinity of the vibrating tube 3A is also determined by the local velocity measuring means 20, so that the relationship between the local velocity V1 and the excitation force is also evaluated. It becomes possible to do.
- FIG. 5 shows a second embodiment of the present invention.
- the same members as those used in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted.
- the void ratio measuring means 41 includes a first electrode 42 and a first electrode provided on the inner surface of the flow portion 2 facing the vibrating tube 3A.
- the first voltage measuring unit 43 that measures the potential difference between the electrode 42 and the surface of the vibrating tube 3A, and the void rate analyzing unit 13 that calculates the void ratio based on the potential difference detected by the first voltage measuring unit 43 are provided. .
- the potential difference between the first electrode 42 and the vibrating tube 3A is caused by the void ratio of the two-phase flow F flowing between the first electrode 42 and the vibrating tube 3A. Since it changes, the void ratio analysis unit 13 can calculate and calculate the void ratio based on the potential difference measured by the first voltage measurement unit 43. For this reason, also in the present embodiment, by using the vibration tube 3A formed of a conductive metal material, the excitation force acting on the vibration tube 3A by a two-phase flow based on the void ratio can be configured with a simple configuration. Easy and accurate evaluation is possible.
- the excitation force evaluation means 5 measures the displacement of the vibration tube 3A by the displacement sensor 5a and evaluates the excitation force based on the displacement.
- a stress sensor may be provided in the vibration tube 3A, and the excitation force may be evaluated based on the stress detected by the stress sensor. Since the vibration tube 3A that vibrates and is displaced by the excitation force also changes the stress in accordance with the displacement, the excitation force can be evaluated by extracting the amplitude of the stress waveform.
- the vibration tube 3A is formed of a conductive metal material. However, in order to function as an electrode, at least a part of the surface is formed of a conductive material. It only has to be done.
- the two-phase flow excitation force evaluation devices 1 and 40 are used for the evaluation of the two-phase flow excitation force.
- the present invention is not limited to this.
- the evaluation of the excitation force of the two-phase flow at least one of the plurality of tube bodies 3 is vibrated by the vibration generating means 4, and the displacement or stress of the tube body corresponding to the excitation force acting on the vibrating tube body is measured.
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Abstract
Description
本願は、2009年5月19日に、日本に出願された特願2009-121190号に基づき優先権を主張し、その内容をここに援用する。
本発明は、流通部に流れる二相流から、該二相流の流れに交差するように複数配設された管体に作用する励振力を評価する二相流励振力評価方法である。前記二相流励振力評価方法では、複数の前記管体の一つを、少なくとも表面の一部を導通可能な材質で形成して、起振手段によって振動させた状態で、該管体の変位または応力を測定するとともに、該管体の表面の所定位置における電位と基準電位との電位差に基づいて前記管体近傍に流れる前記二相流のボイド率を測定することを特徴としている。
さらに、上記の二相流励振力評価装置において、前記二相流速度測定手段で測定された前記二相流の速度、前記ボイド率測定手段で測定された前記二相流のボイド率、及び、前記励振力評価手段で測定された前記振動管の変位または応力に基づいて、ボイド率毎の限界流速を求める限界速度解析部を備えることが好ましい。
前記一対の第一電極、前記第一電圧計測部、前記一対の第二電極、前記一対の第二電極間の電位差を検出する第二電圧計測部、及び前記第一電圧計測部で検出された電位差の波形と前記第二電圧計測部で検出された電位差の波形との位相差によって前記振動管近傍を流れる前記二相流の局所速度を求める局所速度解析部で構成される局所速度測定手段を備えることが好ましい。
また、本発明の二相流励振力評価装置によれば、振動させる管体の一つである振動管を利用して、二相流のボイド率を測定するとともに管体の変位または応力を測定することで、簡易な構成で、容易かつ正確に二相流から管体に作用する励振力を評価することができる。
本発明に係る第1の実施形態について、図1から図4を参照して説明する。
図1及び図2に示すように、本実施形態の二相流励振力評価装置1は、モデルとなる二相流Fを流通させる流通部2と、該流通部2内に二相流Fの流れ方向Xに直交するように配設された複数の管体3と、管体3を振動させる起振手段4と、振動する管体3の変位を測定する励振力評価手段5と、二相流Fのボイド率を測定するボイド率測定手段6と、二相流Fの速度Vを測定する二相流速度測定手段7とを備える。
まず、図1及び図2に示すように、流通部2に、モデルとなる二相流Fを流通させるとともに、二相流Fの流れに交差するように配設された管体3の内の一つである振動管3Aを起振手段4により振動させる。そして、振動管3Aは、周囲を流れる二相流Fから作用する励振力によって励振されることとなる。そして、この振動管3Aの振動に伴う変位が励振力評価手段5によって測定されるとともに、その際に近傍を流れる二相流Fのボイド率がボイド率測定手段6によって、測定される。また、局所速度V1が局所速度測定手段20によって測定されている。流通部2に供給される二相流Fの速度Vは、二相流F測定手段によって測定されている。そして、図4に示すように、限界速度解析部28によって、ボイド率区分毎の限界流速Vcが求められる。
次に、本発明の第2の実施形態について説明する。図5は、本発明の第2の実施形態を示したものである。なお、この実施形態において、前述した実施形態で用いた部材と共通の部材には同一の符号を付して、その説明を省略する。
2 流通部
3 管体
3A 振動管
4 起振手段
5 励振力評価手段
6、41 ボイド率測定手段
7 二相流速度測定手段
10、11、42 第一電極
12、43 第一電圧計測部
13 ボイド率解析部
16、17 第二電極
18 第二電圧計測部
19 局所速度解析部
20 局所速度測定手段
28 限界速度解析部
Claims (11)
- 流通部に流れる二相流から、該二相流の流れに交差するように複数配設された管体に作用する励振力を評価する二相流励振力評価方法であって、
複数の前記管体の一つを、少なくとも表面の一部を導通可能な材質で形成して、起振手段によって振動させた状態で、該管体の変位または応力を測定するとともに、
該管体の表面の所定位置における電位と基準電位との電位差に基づいて前記管体近傍に流れる前記二相流のボイド率を測定することを特徴とする二相流励振力評価方法。 - 請求項1に記載の二相流励振力評価方法であって、
前記二相流の速度をさらに測定し、
測定された前記二相流のボイド率及び速度と前記管体の変位または応力とに基づいて、ボイド率毎の限界流速を求める二相流励振力評価方法。 - 請求項1または請求項2に記載の二相流励振力評価方法であって、
前記二相流のボイド率が、前記管体の表面における二点間の電位差を測定することによって求められる二相流励振力評価方法。 - 請求項3に記載の二相流励振力評価方法であってて、
前記管体の表面で、前記二相流の流れ方向に沿った異なる位置の他の二点間の電位差をさらに測定し、
両二点間のそれぞれで測定される電位差の波形の位相差によって前記管体近傍を流れる前記二相流の局所速度を求める二相流励振力評価方法。 - 請求項1に記載の二相流励振力評価方法であって、
前記二相流のボイド率が、前記管体の表面と前記流通部の内面との間の電位差を測定することによって求められる二相流励振力評価方法。 - 流通部に流れる二相流から、該二相流の流れに交差するように複数配設された管体に作用する励振力を評価する二相流励振力評価装置であって、
複数の前記管体の一つとして構成され、少なくとも表面の一部が導通可能な材質で形成された振動管、
該振動管を振動させる起振手段、
前記振動管の変位または応力を測定する励振力評価手段及び、
該振動管の表面の所定位置における電位と基準電位との電位差に基づいて前記振動管近傍に流れる前記二相流のボイド率を測定するボイド率測定手段を備えることを特徴とする二相流励振力評価装置。 - 請求項6に記載の二相流励振力評価装置であって、
前記二相流の速度を測定する二相流速度測定手段を備える二相流励振力評価装置。 - 請求項7に記載の二相流励振力評価装置であって、
前記二相流速度測定手段で測定された前記二相流の速度、前記ボイド率測定手段で測定された前記二相流のボイド率、及び、前記励振力評価手段で測定された前記振動管の変位または応力に基づいて、ボイド率毎の限界流速を求める限界速度解析部を備える二相流励振力評価装置。 - 請求項6から請求項8のいずれか1項に記載の二相流励振力評価装置であって、前記ボイド率測定手段は、
前記振動管の表面に互いに間隔を有して設けられた一対の第一電極、
前記一対の第一電極間の電位差を検出する第一電圧計測部及び、
該第一電圧計測部で検出された電位差に基づいてボイド率を演算するボイド率解析部を有する二相流励振力評価装置。 - 請求項9に記載の二相流励振力評価装置であって、
前記振動管の表面には、前記一対の第一電極と前記二相流の流れ方向に異なる位置で互いに間隔を有して一対の第二電極が設けられ、
前記一対の第一電極、
前記第一電圧計測部、
前記一対の第二電極、
前記一対の第二電極間の電位差を検出する第二電圧計測部及び、
前記第一電圧計測部で検出された電位差の波形と前記第二電圧計測部で検出された電位差の波形との位相差によって前記振動管近傍を流れる前記二相流の局所速度を求める局所速度解析部で構成される局所速度測定手段を備える二相流励振力評価装置。 - 請求項6に記載の二相流励振力評価装置であって、前記ボイド率測定手段は、
前記流通部の内面に前記振動管の表面と対向して設けられた電極、
前記振動管と前記電極との電位差を検出する電圧計測部及び、
該電圧計測部で検出された電位差に基づいてボイド率を演算するボイド率解析部を有することを特徴とする二相流励振力評価装置。
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US13/133,807 US8707801B2 (en) | 2009-05-19 | 2009-12-17 | Two-phase flow exciting force evaluation method and device acting on a plurality of tube bodies arranged to intersect with the flow |
KR1020117012797A KR101314389B1 (ko) | 2009-05-19 | 2009-12-17 | 2 상류 여진력 평가 방법 및 2 상류 여진력 평가 장치 |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6256825B2 (ja) * | 1982-08-05 | 1987-11-27 | Nissan Motor | |
JP2001272494A (ja) | 2000-03-23 | 2001-10-05 | Japan Atom Energy Res Inst | 気液2相からなる流路内のボイド率を瞬時に計測する方法。 |
JP2007033062A (ja) * | 2005-07-22 | 2007-02-08 | Japan Atomic Energy Agency | 高温高圧で複雑な流路内のボイド率を瞬時計測する電気式ボイド率計及びボイド率計測法 |
JP2009121190A (ja) | 2007-11-16 | 2009-06-04 | Neturen Co Ltd | 鋼材 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5849899A (ja) * | 1981-09-18 | 1983-03-24 | Matsushita Electric Ind Co Ltd | 熱交換器の安全装置 |
JPS6256825A (ja) | 1985-09-06 | 1987-03-12 | Hitachi Ltd | 管群等の異常振動診断方法および装置 |
JPS62106336A (ja) * | 1985-11-05 | 1987-05-16 | Toshiba Corp | 蒸気発生器 |
JPH0546883A (ja) | 1991-08-21 | 1993-02-26 | Toshiba Corp | 監視データ出力方式 |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6256825B2 (ja) * | 1982-08-05 | 1987-11-27 | Nissan Motor | |
JP2001272494A (ja) | 2000-03-23 | 2001-10-05 | Japan Atom Energy Res Inst | 気液2相からなる流路内のボイド率を瞬時に計測する方法。 |
JP2007033062A (ja) * | 2005-07-22 | 2007-02-08 | Japan Atomic Energy Agency | 高温高圧で複雑な流路内のボイド率を瞬時計測する電気式ボイド率計及びボイド率計測法 |
JP2009121190A (ja) | 2007-11-16 | 2009-06-04 | Neturen Co Ltd | 鋼材 |
Non-Patent Citations (3)
Title |
---|
KOJI KAWAMURA ET AL.: "Heiko Mizu-Kuki Niso Funryu no Midare ni yoru Enkan no Shindo", TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS (SERIES C), vol. 64, no. 627, 1998, pages 4123 - 4131, XP008140485 * |
N. YAMAGUCHI ET AL.: "Study on Two-Phase Flow Behavior and Turbulent Excitation Mechanism in a U-Bend Tube-Bundle in Steam Generators Based on Air-Water Two-Phase Flow Model Tests", JSME INTERNATIONAL JOURNAL SERIES B, vol. 36, no. 3, 1993, pages 439 - 448, XP008140322 * |
See also references of EP2434498A4 * |
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KR20110081348A (ko) | 2011-07-13 |
US8707801B2 (en) | 2014-04-29 |
KR101314389B1 (ko) | 2013-10-04 |
EP2434498A4 (en) | 2015-04-01 |
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