CN103604582A - T-type tube test segment, test loop with T-type tube test segment, and airflow entrainment simulation method utilizing T-type tube test segment - Google Patents
T-type tube test segment, test loop with T-type tube test segment, and airflow entrainment simulation method utilizing T-type tube test segment Download PDFInfo
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- CN103604582A CN103604582A CN201310577062.4A CN201310577062A CN103604582A CN 103604582 A CN103604582 A CN 103604582A CN 201310577062 A CN201310577062 A CN 201310577062A CN 103604582 A CN103604582 A CN 103604582A
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Abstract
Provided is a T-type tube test segment which comprises a metal T-type tube, two segments of quartz glass tubes and a visual detection device. The metal T-type tube is provided with a horizontal metal tube and a vertical metal tube. A T-type interface is formed on a connecting part of one end of the vertical metal tube and the horizontal metal tube. One end of each segment of quartz glass tube is respectively connected with two ends of the horizontal metal tube in a sealing way. The visual detection device monitors the flow state of the T-type interface through the quartz glass tubes. The horizontal metal tube and the vertical metal tube are welded together. In two segments of horizontal external metal tubes which are respectively connected with the other end of each segment of the quartz glass tube, at least one horizontal external metal tube can be provided with at least one of a pressure measuring hole, a temperature measuring hole and a flow measuring hole. All the quartz glass tubes and all the metal tubes are circular tubes. Therefore, the T-type tube test segment for two-phase flow and entrainment research is provided, and a measurement requirement and a visual requirement can both be ensured so that the T-type tube test segment is suitable for working under a high pressure condition, and meets a power plant prototype.
Description
Technical field
The present invention relates to the observation of fluid flow state, relate in particular to the visualization measurement of T-shaped interface fluid flow state in T-shaped pipe test section.
Background technology
The T-shaped tubular construction extensively existing in diphasic flow and entrainment characteristics experimental study ，Shi Yi nuclear power plant in T-shaped pipe is prototype, research under nuclear power plant's accident conditions, the diphasic flow in the T-shaped pipe that may occur and carry phenomenon secretly.In nuclear power plant, under this phenomenon and accident conditions, reactor core water loading amount is closely related, so Research Significance is great.
The measurement of each parameter that in T-shaped pipe, diphasic flow is relevant to carrying phenomenon secretly is the basis of mathematical modeling, and in T-shaped pipe, diphasic flow is that its genesis mechanism of understanding is necessary with the visual research of carrying phenomenon secretly.Therefore, the data of measurement and visual data be in T-shaped pipe diphasic flow with to carry research secretly requisite.
In prior art, the analysis of the diphasic flow in T-shaped pipe has been proposed to visualization scheme.
For example, Smoglie, the people such as Reimann (C.Smoglie, J.Reimainn, two-phase flow through small branches in a horizontal pipe with stratified flow[J], int.J.multiphase flow, Vol.12, No.4,609-625 (1986); C.Smoglie, J.Reimainn,
two phase flow through small branches in a horizontal pipe with stratified flow[J], Nuclear Engineering and Design, Vol.99,117-130 (1987); J.Reimainn, M.Khan, flow through a small break at the bottom of a large pipe with straitified flow, Nuclear Science and Engineering, Vol.88,297-310 (1984) .) in the T-shaped pipe band research experiment section that proposes, T-shaped area under control adopts plexiglas material to meet visual demand.The straight-tube portion being connected with T-shaped area under control adopts metal tube, meets measurement demand.Carry out the mobile of T-shaped pipe and carry experimental study secretly obtaining a large amount of measurement data and visual picture information.But, the T-shaped area under control of this type of experimental section is, by punching on plexiglas pipe, the T-shaped area under control that arm forms glass is installed, the T-shaped area under control of experimental section intensity is limited, can only meet the requirement of experiment under lower pressure (< 1MPa), higher pressure brings the danger of breaking can to visual T-shaped area under control.
For another example, the people such as Yonomoto (T.Yonomoto, K.Tasaka, new theoretical model for two-phase flow discharged from stratified two-phase region through small break[J], Journal of NUCLEAR SCIENCE and TECHNOLOGY 25 (5), 441-455 (1988)) in the T-shaped pipe band research experiment section proposing, T-shaped pipe supervisor is square metal tube, three faces in four faces of square metal tube are respectively opened a glass vision panel, and another face connects T-shaped pipe arm.This T-shaped pipe experimental section adopts the square supervisor who opens form, and the flow pattern that is conducive to observe T-shaped area under control, conveniently carries mechanism research secretly.But this experimental section adopts square supervisor to depart from power plant's prototype (power plant adopts pipe), the experimental data industrial application value that this experimental section is surveyed is less.
Therefore, exist taking into account the needs of the T-shaped pipe experimental section of measuring requirement and visual requirement.
Summary of the invention
Be intended to overcome or alleviate technical matters of the prior art, proposing the present invention.
According to an aspect of the present invention, proposed a kind of T-shaped pipe test section, having comprised: the T-shaped pipe of metal, there is horizontal metal pipe and vertical metal pipe, one end of described vertical metal pipe and described horizontal metal pipe joint form T-shaped interface; Two sections of quartz glass tubes, one end of two sections of quartz glass tubes is sealably coupled to respectively the two ends of described horizontal metal pipe; And visual checkout equipment, see through the fluidised form that quartz glass tube is monitored described T-shaped interface.
Favourable, horizontal metal pipe and vertical metal pipe can weld together.
Favourable, all quartz glass tubes and all metal tubes are all pipe.
Described visual checkout equipment is high-speed camera.Further, described visual checkout equipment comprises two high-speed cameras, and one of them high-speed camera is positioned near a quartz glass tube, and another high-speed camera is positioned near another quartz glass tube.
Favourable, be connected the outer metal tube of two sections of levels that connect respectively with the other end of two sections of quartz glass tubes, on the outer metal tube of at least one level, be provided with at least one in pressure tap, thermometer hole, flow measurement metering-orifice.
Above-mentioned T-shaped pipe test section also can comprise: one section of vertical outer metal tube, be connected to the other end of described vertical metal pipe, and on wherein said vertical outer metal tube, be provided with at least one in pressure tap, thermometer hole, flow measurement metering-orifice.
Favourable, quartz glass tube connects with the employing flange seal that is connected between all metal tubes.
The invention still further relates to a kind of test loop, comprise above-mentioned T-shaped pipe test section, wherein: be connected the outer metal tube of two sections of levels that connect respectively with the other end of two sections of quartz glass tubes, on the outer metal tube of at least one level, be provided with at least one in pressure tap, thermometer hole, flow measurement metering-orifice, and/or T-shaped pipe test section also can comprise one section of vertical outer metal tube, be connected to the other end of described vertical metal pipe, on wherein said vertical outer metal tube, be provided with at least one in pressure tap, thermometer hole, flow measurement metering-orifice.
The present invention also relates to a kind of method of utilizing above-mentioned T-shaped pipe test section simulation air-flow to carry secretly, comprise step: above-mentioned T-shaped pipe test section is linked in test loop; Entrance to a quartz glass tube of described T-shaped pipe test section provides the stream-liquid two-phase flow being comprised of empty G&W, and water flows out from the outlet of another quartz glass tube; In the situation that keep the liquid level in T-shaped pipe test section constant, increase and to flow through the flow velocity of the air in T-shaped pipe test section until the water droplet in T-shaped pipe test section, along with in air-flow enters into described vertical metal pipe and occur carrying secretly phenomenon, utilizes visual checkout equipment to see through the fluidised form of the described T-shaped interface of quartz glass tube monitoring.While occurring carrying phenomenon secretly, the pressure of stream-liquid two-phase flow can be greater than 1Mpa.
Accompanying drawing explanation
Fig. 1 is according to the structural representation of the T-shaped pipe test section of one exemplary embodiment of the present invention.
Fig. 2 is that the T-shaped pipe test section in Fig. 1 is used the schematic diagram in experimental loop.
Embodiment
Describe the embodiment of exemplary of the present invention below in detail, the example of embodiment is shown in the drawings, and wherein same or analogous label represents same or analogous element.The embodiment describing below with reference to accompanying drawing is exemplary, is intended to explain the present invention, and can not be interpreted as limitation of the present invention.
As shown in Figure 1, according to the T-shaped pipe test section of exemplary embodiment of the present invention, comprise: the T-shaped pipe 10 of metal, there is horizontal metal pipe 12 and vertical metal pipe 14, one end of described vertical metal pipe 14 and described horizontal metal pipe 12 joints form T-shaped interface; One end of 20,30, two sections of quartz glass tubes of two sections of quartz glass tubes is sealably coupled to respectively the two ends of described horizontal metal pipe 12; And visual checkout equipment 40, see through the fluidised form that quartz glass tube is monitored described T-shaped interface.
Due to the supervisor of T-shaped pipe test section, for connected horizontal metal pipe and vertical metal pipe, (horizontal metal pipe and vertical metal pipe can weld together, also can be one-body molded), but not open the method for glass vision panel as the people's such as Somglie utilize glass material or utilization, so this experimental section guarantees the geometric similarity of engineering reality and T-shaped experimental section, and when carrying out the experiment of elevated pressures, more safe and reliable.Again, the fluidised form of T-shaped interface in the present invention (for example diphasic flow and carry secretly) can be observed outside by the good quartz glass tube of printing opacity, and therefore, T-shaped pipe test section of the present invention has also met visual requirement.
Preferably, in described T-shaped pipe test section, flow through two-phase fluid, described two-phase fluid is the pressure fluid that pressure is greater than 1Mpa.But, this test section also can pass through one phase flow body.
Favourable, all quartz glass tubes and all metal tubes are all pipe.Such design example, as more pressed close under the actual conditions of power plant, has engineering significance more.
Described visual checkout equipment 40 can be high-speed camera.Favourable, described visual checkout equipment comprises two high-speed cameras, one of them high-speed camera is positioned near a quartz glass tube, and another high-speed camera is positioned near another quartz glass tube, as shown in fig. 1.As one of ordinary skill in the understanding, position that can setting high-speed video camera is so that can observe preferably T-shaped interface by the camera lens of high-speed camera.A high-speed camera can be only set, also more high-speed camera can be set.So long as the equipment of image that can the T-shaped interface of Real-time Obtaining all can be used as visual checkout equipment.
As shown in fig. 1, quartz glass tube 20,30 connects with the employing flange seal that is connected between all metal tubes 10,50,60.Connection between flange can be used bolt.
One end of quartz glass tube 20,30 is connected to the two ends of the horizontal metal pipe 12 of T-shaped pipe by flange seal.Then the outer metal tube 50,60 of level is sealably coupled to respectively to the other end of quartz glass tube 20,30 by flange, vertical outer metal tube 80 is connected to one end of vertical metal pipe 14 by flange seal.Through above step, just complete the assembling of T-shaped pipe experimental section, by the mode insert experiment loop of the experimental section welding assembling or flange connection, can carry out T-shaped pipe diphasic flow and carry experiment secretly.
The air entrained liquids of take below experiment is its embodiment of example brief description:
As shown in Figure 2, vapour-liquid two phase stratification stream a in Fig. 2 that empty G&W forms partly enters T-shaped pipe test section entrance, when T-shaped interface is flowed through in this stratified flow, an air part that is positioned at stratified flow upper strata enters arm, then flow into c part, the remaining part of stratified flow continues to move until enter b part along supervisor downstream.Under the constant prerequisite of stratified flow liquid level, when the air velocity in flowing into T-shaped arm reaches a critical value, can make drop break away from the constraint of gravity and enter in arm or vertical metal pipe and occur carrying secretly phenomenon, and along with air-flow together flows out arm and arrives c part, there is T-shaped pipe band.The a part here, b part and c are partly the interface 70 in experimental loop.While occurring carrying phenomenon secretly, the pressure of stream-liquid two-phase flow can be greater than 1Mpa.
The position of carrying secretly is at the T-shaped pipe of metal place, and therefore that research is carried secretly to mechanism is most important near the visual picture information T-shaped interface.Utilize apparatus of the present invention to test, high-speed camera record be observed or be utilized to the mobility status in T-shaped area under control can by the good quartz glass of printing opacity tube outside.
For T-shaped pipe diphasic flow and the research of carrying secretly, the temperature relating to, pressure, liquid level parameter, can utilize the measured hole on metal tube thermopair, pressure/differential pressure pickup, level probe to be installed to measure, for example, and the sealing of these measuring equipments can complete by welding: the sealing in temperature survey hole can be by reaching thermopair cutting ferrule and metal tube welding; The sealing of pressure/differential pressure pickup can be by reaching pressure pipe and metal tube welding; The sealing of level probe, because probe is superfine and measured hole is grade, can reach good sealing by high-temp glue.Particularly, referring to Fig. 1, T-shaped pipe test section also comprises the outer metal tube 50,60 of two sections of levels that is connected connection respectively with the other end of two sections of quartz glass tubes 20,30, is provided with at least one in pressure tap, thermometer hole, flow measurement metering-orifice (unified with Reference numeral 90 expressions) on the outer metal tube 50,60 of at least one level.Similarly, T-shaped pipe test section also can comprise one section of vertical outer metal tube 80, be connected to the other end of described vertical metal pipe 14, on wherein said vertical outer metal tube 80, be provided with at least one in pressure tap, thermometer hole, flow measurement metering-orifice (unified with Reference numeral 90 expressions).
Compared with prior art, the present invention has following beneficial effect one of at least:
1. the T-shaped pipe of metal is formed by horizontal metal pipe and the welding of vertical metal pipe, and T-shaped interface adopts ripe welding technology, be convenient to the T-shaped pipe manufacturer processing of metal, and intensity is higher, can be applicable to the T-shaped pipe experiment in elevated pressures situation, safe and reliable;
2. the two ends of the horizontal segment of the T-shaped pipe of metal (being horizontal metal pipe) the transparent quartz glass tube that is tightly connected respectively, visualized experiment equipment can, by the experiment situation in glass tube monitoring record experimental section, make this experimental section take into account the demand of visual research;
3. measured hole is positioned on metal tube, easily (for example on metal tube, be easy to the sealing of perforate and measured hole, metal piezometric tube can pass through welded seal with measured hole), avoid opening measured hole on quartz glass tube, so that affect the intensity (frangible) of glass tube, and the sealing on glass tube between measured hole and measuring equipment is more difficult, be unsuitable for the experiment under high pressure.
4. take completely power plant actual be prototype, closing to reality, has more engineering significance more.
5. this experimental section is simple in structure, dismounting, easy to maintenance.
In a word, the invention provides and a kind ofly not only taken into account measurement demand, but also can guarantee visual demand, be suitable for working under condition of high voltage, and the T-shaped pipe diphasic flow that meets power plant's prototype with carry the experimental section of research secretly.
Above content is in conjunction with concrete preferred implementation further description made for the present invention; can not assert that the specific embodiment of the present invention only limits to this; for general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; can also make some simple deduction or replace, all should be considered as belonging to the present invention and determine scope of patent protection by submitted to claims.
Claims (12)
1. a T-shaped pipe test section, comprising:
The T-shaped pipe of metal, has horizontal metal pipe and vertical metal pipe, and one end of described vertical metal pipe and described horizontal metal pipe joint form T-shaped interface;
Two sections of quartz glass tubes, one end of two sections of quartz glass tubes is sealably coupled to respectively the two ends of described horizontal metal pipe; And
Visual checkout equipment, sees through the fluidised form that quartz glass tube is monitored described T-shaped interface.
2. T-shaped pipe test section according to claim 1, wherein:
Horizontal metal pipe and vertical metal pipe weld together.
3. T-shaped pipe test section according to claim 1, wherein:
All quartz glass tubes and all metal tubes are all pipe.
4. T-shaped pipe test section according to claim 1, wherein:
Described visual checkout equipment is high-speed camera.
5. T-shaped pipe test section according to claim 4, wherein:
Described visual checkout equipment comprises two high-speed cameras, and one of them high-speed camera is positioned near a quartz glass tube, and another high-speed camera is positioned near another quartz glass tube.
6. according to the T-shaped pipe test section described in any one in claim 1-5, also comprise:
Be connected the outer metal tube of two sections of levels that connect respectively with the other end of two sections of quartz glass tubes, on the outer metal tube of at least one level, be provided with at least one in pressure tap, thermometer hole, flow measurement metering-orifice.
7. T-shaped pipe test section according to claim 6, also comprises:
One section of vertical outer metal tube, is connected to the other end of described vertical metal pipe, on wherein said vertical outer metal tube, is provided with at least one in pressure tap, thermometer hole, flow measurement metering-orifice.
8. according to the T-shaped pipe test section described in any one in claim 1-7, wherein:
Quartz glass tube connects with the employing flange seal that is connected between all metal tubes.
9. a test loop, comprises according to the T-shaped pipe test section described in claim 6 or 7.
10. test loop according to claim 9, wherein:
Quartz glass tube connects with the employing flange seal that is connected between all metal tubes.
11. 1 kinds are utilized the method that in claim 1-8, the T-shaped pipe test section simulation air-flow described in any one is carried secretly, comprise step:
Above-mentioned T-shaped pipe test section is linked in test loop;
Entrance to a quartz glass tube of described T-shaped pipe test section provides the stream-liquid two-phase flow being comprised of empty G&W, and water flows out from the outlet of another quartz glass tube;
In the situation that keep the liquid level in T-shaped pipe test section constant, increase and to flow through the flow velocity of the air in T-shaped pipe test section until the water droplet in T-shaped pipe test section, along with in air-flow enters into described vertical metal pipe and occur carrying secretly phenomenon, utilizes visual checkout equipment to see through the fluidised form of the described T-shaped interface of quartz glass tube monitoring.
12. methods according to claim 11, wherein:
While occurring carrying phenomenon secretly, the pressure of stream-liquid two-phase flow is greater than 1Mpa.
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| CN201310577062.4A CN103604582A (en) | 2013-11-18 | 2013-11-18 | T-type tube test segment, test loop with T-type tube test segment, and airflow entrainment simulation method utilizing T-type tube test segment |
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| CN201310577062.4A CN103604582A (en) | 2013-11-18 | 2013-11-18 | T-type tube test segment, test loop with T-type tube test segment, and airflow entrainment simulation method utilizing T-type tube test segment |
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| CN103604582A true CN103604582A (en) | 2014-02-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104217632A (en) * | 2014-09-05 | 2014-12-17 | 中国核动力研究设计院 | High-pressure steam-liquid phase distribution characteristic experiment device |
| CN108766601A (en) * | 2018-04-11 | 2018-11-06 | 哈尔滨工程大学 | A kind of experimental provision and experimental method suitable for the entrainment research of multiple working medium liquid phase |
| CN109341873A (en) * | 2018-12-14 | 2019-02-15 | 中国航发沈阳发动机研究所 | A kind of temperature probe |
| CN111968766A (en) * | 2019-05-20 | 2020-11-20 | 国家电投集团科学技术研究院有限公司 | Test device for simulating entrainment of hot leg section of reactor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217632A (en) * | 2014-09-05 | 2014-12-17 | 中国核动力研究设计院 | High-pressure steam-liquid phase distribution characteristic experiment device |
| CN108766601A (en) * | 2018-04-11 | 2018-11-06 | 哈尔滨工程大学 | A kind of experimental provision and experimental method suitable for the entrainment research of multiple working medium liquid phase |
| CN109341873A (en) * | 2018-12-14 | 2019-02-15 | 中国航发沈阳发动机研究所 | A kind of temperature probe |
| CN109341873B (en) * | 2018-12-14 | 2020-12-04 | 中国航发沈阳发动机研究所 | Temperature probe |
| CN111968766A (en) * | 2019-05-20 | 2020-11-20 | 国家电投集团科学技术研究院有限公司 | Test device for simulating entrainment of hot leg section of reactor |
| CN111968766B (en) * | 2019-05-20 | 2022-04-12 | 国家电投集团科学技术研究院有限公司 | Test device for simulating entrainment of hot leg section of reactor |
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Application publication date: 20140226 |