CN104776976B - Entry ventilation multiphase flow experiment simulation mechanism - Google Patents
Entry ventilation multiphase flow experiment simulation mechanism Download PDFInfo
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- CN104776976B CN104776976B CN201510169668.3A CN201510169668A CN104776976B CN 104776976 B CN104776976 B CN 104776976B CN 201510169668 A CN201510169668 A CN 201510169668A CN 104776976 B CN104776976 B CN 104776976B
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- 238000009423 ventilation Methods 0.000 title claims abstract description 25
- 238000004088 simulation Methods 0.000 title claims abstract description 15
- 238000002474 experimental method Methods 0.000 title abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 71
- 238000007789 sealing Methods 0.000 abstract description 6
- 210000003934 vacuole Anatomy 0.000 description 17
- 108010066278 cabin-4 Proteins 0.000 description 14
- 230000000694 effects Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 238000011161 development Methods 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 230000001687 destabilization Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005273 aeration Methods 0.000 description 1
- 230000003542 behavioural effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention provides an entry ventilation multiphase flow experiment simulation mechanism. The mechanism comprises a conical air collecting bin, a circular sealing ring mounted at one end of the conical air collecting bin, an airtight cover plate mounted at one end of the conical air collecting bin and located on the inner side of the circular sealing ring, a piston rod fixedly connected with the center of the airtight cover plate and a cavitator connected with the other end of the piston rod, wherein a hollow cylindrical platform is also arranged on the outer side of one end of the conical air collecting bin, at least six vent holes are circumferentially formed in the hollow cylindrical platform at equal intervals, and the piston rod is located in the hollow cylindrical platform. According to the mechanism, the interference caused by an external ventilation pipeline to the experiment and the flow field can be effectively reduced, and the validity of experiment simulation is guaranteed; the sealing state of the airtight cover plate is realized by the aid of the air collecting bin, meanwhile, the air collecting bin is opened under the action of the entry impact load, and effective ventilation during entry is realized.
Description
Technical field
Enter water ventilation Multiphase Flow experimental simulation mechanism the present invention relates to a kind of experimental simulation mechanism, more particularly to one kind.
Background technology
With the development and application of multiphase flow drag reduction technology in water, the sail body of water is entered for the water surface and in the air, for reality
Ultralow resistance navigation in present water, before water is entered, aerating system has started sail body.So to develop into water ventilation
Multiphase Flow technique of experimental simulation is to solve the key technology into water ventilation multiphase flow.
On the other hand, also can cavitation, the boat after after water is entered for the common water surface and the sail body of airflight
During row, because crumbling and fall for vacuole can cause the trajectory unstability of sail body.May and Waugh are pointed out, if it is possible to controlled into water
The stability of vacuole just can ensure the stability of sail body trajectory, and the problem does not still obtain effectively solution to current.With
The development of multi-phase flow technology in water, by the controllability of ventilation multiphase flow, it is possible to achieve solve the common water surface and airflight
Sail body bubble collapse can be formed after water is entered cause sail body trajectory destabilization problems.Therefore carry out and ground into water ventilation multiphase flow
Studying carefully helps to solve to cause sail body trajectory destabilization problems into water cavitation.
For worked without aerating system sail body over entry when, surface closure typically precede deep water closure.However,
(particularly tilt into the water) in some cases, the possible specific surface closure of deep water closure occurs earlier.Sail body enters shape after water
Into form and time that surface closure or deep water closure occur, depend primarily on into water condition.And vacuole surface closure and deep water
Relation between closure, is involved in the number of air capacity and buoyancy effect in vacuole of the air that is involved in when determining water.This
A little factors are vacuole unstability and deciding factors for causing sail body to move unstability that crumbles and fall in further development.Especially for
In the case that aerating system works when water is entered, due to being passed through the effect of gas, the amount and volume that air is involved in during into water can be changed
Enter buoyancy effect of the air in vacuole.It is being passed through gas and is being involved under the collective effect of air, surface closure and deep water is being closed
New relation and form occurs, this will cause new vacuole unstability and the mechanism that crumbles and fall.Ventilation multiphase flow is being involved in air, is being passed through
Gas in vacuole certainly will be caused to pile up under gas and keel depth change synergy, vacuole interface shearing layer and vacuole outside are pressed
The presence of the phenomenons such as Reeb.In this case, there is lasting ambient pressure change, the elasticity of gas increases and boundary in vacuole
The collective effect of face shear layer.Vacuole is most caused to occur being lost by ventilation unstability (piling up excessive gas in vacuole), shear layer at last
Surely (presence of cavity boundary sliding velocity) or bubble oscillation unstability (ambient pressure environment change) etc. are single is present or various shapes
The new mechanism of the vacuole unstability that formula joint is present.
Worthington have studied into water phenomenon at first, observed spheroid and enters the splash and vacuole produced during water.Thereafter
The problems such as researcher enters structure destruction, trajectory unstability and ricochet during water mainly for air-drop movable body launches grinding into water
Study carefully.It is more to pay close attention to the influence developed to sail body load character into water process cavitation, and cavity flow is focused on how in itself to keep away
Exempt from its negative effect., to disk, circular cone cavitation device is carried out in water hole and towing basin for experimental study aspect, Reichardt etc.
Substantial amounts of experimental study, obtains cavitation device experience resistance calculation formulae.Ventilated in the two-dimentional water of Michel experimental studies multiphase
Stream length and the relation between Froude number, ventilated cavitation number and throughput, give matched curve.Savchenko leaders'
Team has carried out multiphase flow experiment research in substantial amounts of water, has obtained the cavity shape fitting formula, not of axial symmetry multiphase flow stream
Criterion and enter water multiphase development etc. that Lao De numbers influence on ventilation multiphase flow stream.Kuklinski, Kawakami are to ventilation
Hesitation of multiphase flow etc. has carried out a series of researchs in water.The team that Arndt etc. leads is by multiphase flow stream in a large amount of water
Control release is studied.Backer have studied the resistance variation characteristic that conical vertical enters water process.Gekle experimental studies vacuole depth
The motion conditions of vacuole internal air stream in closing course, Truscott has carried out spheroid slow speed vertical and has entered water multiphase form
Change and multiphase flow are to the affecting laws experimental study of ball fluid power.The country, Chen Xin etc. are to sail body ventilation multiphase flow
And natural multiphase flow flow mechanism has carried out substantial amounts of numerical value and experimental study.Wang Yiwei is based on projectile experiment and numerical computations are examined
The stability mechanism of the local multiphase flow of ventilation is considered.He Chuntao has carried out many experiments to tap web head sail body, gives sky
The drag characteristic of bubble fluidal texture and sail body.
In sum, problem of water entry is always that early stage is mainly for sail body by one of everybody focus of attention and difficult point
The load and ballistic characteristics for entering water process are conducted extensive research.With the development of multiphase flow drag reduction technology in water, enter water many
Mutually stream development earn widespread respect, and carried out enter water multiphase research.But it is directed to the research into the water multiphase rule of development
In the starting stage, enough understanding particularly is lacked to the closure behavioral study for entering water ventilation multiphase flow primary growth, do not had
For the experimental technique of the problem.Subject matter is that general experiment aerating system can accurately control flow using pipeline supply,
But enter water experiment to be kept in motion, the movement locus and multiphase flow that carrying aerating system pipeline can have a strong impact on model are formed,
How to realize being simulated in water drum and disclosed into water ventilation multiphase flow initial stage life into the ventilate accurate determination of multiphase flow and throughput of water
The precondition of closure behavior long.So being badly in need of one kind enters water ventilation experimental simulation mechanism.
The content of the invention
The invention aims to study sail body enter water ventilation multiphase flow primary growth closure behavior and provide one
Plant water ventilation Multiphase Flow experimental simulation mechanism.
The object of the present invention is achieved like this：Including conical gas collection cabin, the circle installed in conical gas collection cabin end
O-ring seal, closed cover plate and closed cover plate installed in conical gas collection cabin end and on the inside of annular seal circle
Piston rod that center is fixedly connected and the cavitation device being connected with the piston rod other end, the conical gas collection cabin end outside is also
Hollow cylinder table top is provided with, at least six passages, and passage are provided with the circumference of the hollow cylinder table top
Interval between passage is equal, and the piston rod is located inside hollow cylinder table top.
The present invention also has following architectural feature：
1. there is passage at least described in two rows, often drain into rare six, and interval between passage and passage is equal.
Compared with prior art, the beneficial effects of the invention are as follows：The gas that the present invention is passed through by model bay section storage, can
Effectively to reduce external aeration pipeline to experiment and the interference in flow field, it is ensured that the validity of experimental simulation；By the height in gas storage storehouse
Pressure realizes the sealing state of sealing plate, while it is effective when water is entered to open the realization of gas storage storehouse by water impact impact loading
Ventilation.The present invention does not have aerating system pipeline, even if the present invention is kept in motion in water experiment is entered does not interfere with mould yet
The formation of the movement locus and multiphase flow of type.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Specific embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
With reference to Fig. 1, the present invention includes conical gas collection cabin 4, the annular seal circle installed in the conical end of gas collection cabin 4
3rd, the closed cover plate 7 installed in the conical end of gas collection cabin 4 and positioned at the inner side of annular seal circle 3 and the center of closed cover plate 7
The piston rod 9 being fixedly connected and the cavitation device 1 being connected with the other end of piston rod 9, the conical end of gas collection cabin 4 outside also set
Hollow cylinder table top 8 is equipped with, at least six passages 2, and passage are provided with the circumference of the hollow cylinder table top 8
Interval between passage is equal, and the piston rod 9 is located inside hollow cylinder table top 8.
The present invention can also be：Have passage at least described in two rows, often drain into rare six, and passage and passage it
Between interval it is equal, the row of passage can need be accordingly increased according to size.
The present invention is one to be inserted in water ventilation experimental simulation mechanism, and the dynamic of Multiphase Flow of being ventilated into water can be simulated in water
Process.The course of work of the invention is mainly：Before emission test, in the conical injecting compressed air of gas collection cabin 4, in compression
The closed cover plate 7 and annular seal circle 3 for being under the high pressure effect of air ensure that gas collection cabin disconnects with passage 2；Work as sail body
When entering water, by shock loading, under impact loading, the mechanism for being connected with cavitation device 1 and closed cover plate 7 is moved back by
It is dynamic, open conical gas collection cabin 4 and the direct passage of passage 2 so that compressed air flows out from passage 2.Double-head arrow in Fig. 1
5 flow directions for representing compressed air, double-head arrow 6 represents the direction of motion of closed cover plate 7.
By calculating, water impact pressure of the invention is more than the compressed air pressure in conical gas collection cabin 4, and follow-up
In the presence of cavitation resistance, the opening of closed cover plate 7 is able to maintain that, so the mechanism can realize ventilating empty into water process
The experimental simulation of change.Simultaneously as entering, water process is very short, the pressure in conical gas collection cabin 4 is almost unchanged in the middle of supply process,
Accurately throughput just can be designed according to pressure and channel size.Therefore just can realize that sail body enters water mistake by the present invention
The simulation of Cheng Tongqi multiphase flow experiments and the accurate determination of throughput.
Connecting mode of the invention：
Cavitation device 1 and all it is connected through a screw thread and closed cover plate 7 and piston rod 9 between.
Cavitation device 1 and closed cover plate 7 are coupled by a piston rod 9, can integrally be moved repeatedly.Passage 2 is located at mould
On hollow cylinder table top 8 before type conical section, the table top 8 is screwed with conical gas collection cabin 4 and couples.Closed cover plate 7
Extruding annular seal circle 3 can be pushed ahead under the effect of the pressure-air in conical gas collection cabin 4, it is final to ensure cone collection
The aeroseal in gas cabin 4.Under the effect of water impact pressure, cavitation device 1 and piston rod 9 are moved rearwards by, and open gas channel side
To 5, while ensureing to be in sealing state before passage.
1) preparation：Before emission test, in the conical injecting compressed air of gas collection cabin 4, in the height of compressed air
Pressure effect is lower to cause that closed cover plate 7 and annular seal circle 3 ensure that conical gas collection cabin 4 disconnects with passage 2；
2) implement into water：When sail body enters water, by shock loading, under impact loading, cavitation device 1 is connected with
And the mechanism of closed cover plate 7 is moved rearwards by.
3) in the presence of the mechanism, the channel opener between conical gas collection cabin 4 and passage 2, then compressed air
Flowed out from passage 2.
Claims (2)
1. one kind enters water ventilation Multiphase Flow experimental simulation mechanism, it is characterised in that：Including conical gas collection cabin, installed in circular cone
The annular seal circle of shape gas collection cabin end, installed in conical gas collection cabin end and closed on the inside of annular seal circle
Piston rod that cover plate is fixedly connected with closed cover plate center and the cavitation device being connected with the piston rod other end, the cone
Gas collection cabin end outside is additionally provided with hollow cylinder table top, and at least six are provided with the circumference of the hollow cylinder table top
Interval between passage, and passage and passage is equal, and the piston rod is located inside hollow cylinder table top.
2. one kind according to claim 1 enters water ventilation Multiphase Flow experimental simulation mechanism, it is characterised in that：Have at least two
The passage is arranged, rare six are often drained into, and interval between passage and passage is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510169668.3A CN104776976B (en) | 2015-04-10 | 2015-04-10 | Entry ventilation multiphase flow experiment simulation mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510169668.3A CN104776976B (en) | 2015-04-10 | 2015-04-10 | Entry ventilation multiphase flow experiment simulation mechanism |
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| Publication Number | Publication Date |
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| CN104776976A CN104776976A (en) | 2015-07-15 |
| CN104776976B true CN104776976B (en) | 2017-05-24 |
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| CN201510169668.3A Expired - Fee Related CN104776976B (en) | 2015-04-10 | 2015-04-10 | Entry ventilation multiphase flow experiment simulation mechanism |
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| CN106932169B (en) * | 2017-03-16 | 2018-11-09 | 大连理工大学 | A kind of revolution is ventilated the air-breather tested into water |
| CN108036921B (en) * | 2017-11-13 | 2020-11-03 | 北京理工大学 | High-pressure ventilation device for inhibiting natural cavitation bubble-shaped flow shock wave characteristic |
| CN109141813A (en) * | 2018-08-24 | 2019-01-04 | 浙江大学 | A kind of ring-type Cavity bubble generation device |
| CN109506881B (en) * | 2018-10-11 | 2020-04-17 | 天津大学 | Channel flow field simulation test method |
| CN109520701B (en) * | 2018-10-11 | 2020-07-10 | 天津大学 | Channel flow field simulation device |
| CN109596313B (en) * | 2019-01-11 | 2024-05-10 | 哈尔滨工程大学 | Active ventilation type underwater vehicle test device |
| CN111272387B (en) * | 2020-03-24 | 2021-02-26 | 北京理工大学 | Cavitation additional action torque measuring method and device for water tunnel experiment |
| CN111413066B (en) * | 2020-04-09 | 2021-10-26 | 西北工业大学 | Load-reducing model experiment launching device |
| CN115753763B (en) * | 2022-11-07 | 2024-05-31 | 哈尔滨工程大学 | Variable-angle free water outlet test device and method without emission gas interference |
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|---|---|---|---|---|
| SU449277A1 (en) * | 1971-12-13 | 1974-11-05 | Предприятие П/Я Г-4974 | Hydrodynamic tube |
| JPS52143697A (en) * | 1976-05-26 | 1977-11-30 | Ishikawajima Harima Heavy Ind Co Ltd | Propeller experimenting device |
| CN102749000A (en) * | 2012-07-02 | 2012-10-24 | 中国科学院力学研究所 | Horizontal underwater manual ventilation cavitation simulating device |
| CN203732238U (en) * | 2014-03-25 | 2014-07-23 | 哈尔滨工业大学 | Ventilation device for underwater supercavitation navigation body scaled model test |
| CN204556218U (en) * | 2015-04-10 | 2015-08-12 | 哈尔滨工程大学 | One enters water ventilation Multiphase Flow experimental simulation mechanism |
-
2015
- 2015-04-10 CN CN201510169668.3A patent/CN104776976B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU449277A1 (en) * | 1971-12-13 | 1974-11-05 | Предприятие П/Я Г-4974 | Hydrodynamic tube |
| JPS52143697A (en) * | 1976-05-26 | 1977-11-30 | Ishikawajima Harima Heavy Ind Co Ltd | Propeller experimenting device |
| CN102749000A (en) * | 2012-07-02 | 2012-10-24 | 中国科学院力学研究所 | Horizontal underwater manual ventilation cavitation simulating device |
| CN203732238U (en) * | 2014-03-25 | 2014-07-23 | 哈尔滨工业大学 | Ventilation device for underwater supercavitation navigation body scaled model test |
| CN204556218U (en) * | 2015-04-10 | 2015-08-12 | 哈尔滨工程大学 | One enters water ventilation Multiphase Flow experimental simulation mechanism |
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| 运动体高速入水非定常过程研究;安伟光 等;《工程力学》;20110331;第28卷(第3期);第251-256页 * |
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