CN204556218U - One enters water ventilation Multiphase Flow experimental simulation mechanism - Google Patents
One enters water ventilation Multiphase Flow experimental simulation mechanism Download PDFInfo
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- CN204556218U CN204556218U CN201520216245.8U CN201520216245U CN204556218U CN 204556218 U CN204556218 U CN 204556218U CN 201520216245 U CN201520216245 U CN 201520216245U CN 204556218 U CN204556218 U CN 204556218U
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- water
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- collection cabin
- air hole
- piston rod
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Abstract
The utility model provides one to enter water ventilation Multiphase Flow experimental simulation mechanism, comprise conical gas collection cabin, be arranged on the annular seal circle of end, conical gas collection cabin, be arranged on conical end, gas collection cabin and be positioned at the airtight cover plate inside annular seal circle, the piston rod be fixedly connected with airtight cover plate center and the cavitation device be connected with the piston rod other end, the cylinder table top of hollow is also provided with outside end, described conical gas collection cabin, the circumference of the cylinder table top of described hollow is provided with at least six air holes, and interval between air hole and air hole is equal, the cylinder table top that described piston rod is positioned at hollow is inner.The utility model effectively can reduce external aeration pipeline to experiment and the interference in flow field, ensures the validity of experimental simulation; High pressure by gas storage storehouse realize seal pad sealing state, simultaneously open gas storage storehouse by the effect of water impact load and realize the effective ventilation when entering water.
Description
Technical field
The utility model relates to a kind of experimental simulation mechanism, particularly relates to one and enters water ventilation Multiphase Flow experimental simulation mechanism.
Background technology
Along with the development and apply of polyphasic flow drag reduction technology in water, for the water surface and the sail body entering water in the air, in order to realize ultralow resistance navigation in water, sail body is before entering water, and aerating system is started working.Think that developing into water ventilation Multiphase Flow technique of experimental simulation is solve the gordian technique into water ventilation polyphasic flow.
On the other hand, also can cavitation after entering water for the sail body of the common water surface and airflight, in navigation process afterwards, because crumbling and fall of cavity can cause the trajectory unstability of sail body.May and Waugh points out, if the stability that can control water-entry cavity just can ensure the stability of sail body trajectory, and this problem does not still obtain effective solution up till now.Along with the development of multi-phase flow technology in water, by the controllability of ventilation polyphasic flow, the sail body that can realize solving the common water surface and airflight can form bubble collapse and cause sail body trajectory destabilization problems after entering water.Therefore carry out and contribute to solving and cause sail body trajectory destabilization problems into the research of water ventilation polyphasic flow into water cavitation.
For when not having a sail body over entry of aerating system work, surface is closed to be closed prior to deep water usually.But (particularly tilt into the water) in some cases, deep water closes the more morning that possibility specific surface closes generation.Sail body forms the form and time that generation surface is closed or deep water is closed after entering water, depend primarily on into water condition.And cavity surface is closed and deep water close between relation, be involved in when determining water air capacity number and the elastic effect of air in cavity that be involved in.These factors are cavity unstabilitys and crumble and fall and cause the deciding factor of sail body motion unstability in further developing.Particularly when aerating system work for when entering water, owing to passing into the effect of gas, be involved in the amount of air when can change water and be involved in the elastic effect of air in cavity.Under the acting in conjunction passing into gas and be involved in air, closed the closing with deep water in surface there will be new relation and form, and this will cause new cavity unstability and the mechanism that crumbles and fall.Ventilation polyphasic flow being involved in air, pass into gas and keel depth change synergy under certainly will cause that gas in cavity is piled up, the existence of the phenomenon such as cavity interface shearing layer and cavity external pressure ripple.In this case, there is the elasticity increase of gas and the acting in conjunction of interface shearing layer in lasting ambient pressure change, cavity.Cavity is caused to occur being combined by the single existence such as ventilation unstability (in cavity overheap gas), shear layer unstability (existence of cavity boundary sliding velocity) or bubble oscillation unstability (ambient pressure environment change) or various ways the new mechanism of the cavity unstability of existence the most at last.
Worthington have studied at first into water phenomenon, observed the splash and cavity that produce when spheroid enters water.Thereafter researcher enters mainly for air-drop movable body the research that the problems such as structural failure in water process, trajectory unstability and ricochet launch into water.Close injects the impact of water process cavitation evolution on sail body load character more, and pays close attention to how to avoid its negative effect to cavity flow itself.Experimental study aspect, Reichardt etc. are to disk, and circular cone cavitation device has carried out a large amount of experimental studies in water hole and towing basin, obtain cavitation device experience resistance calculation formulae.To ventilate in the two-dimentional water of Michel experimental study polyphasic flow length and the relation between Froude number, ventilated cavitation number and throughput, give matched curve.The team of Savchenko leader has carried out multiphase flow experiment research in a large amount of water, obtains the cavity shape fitting formula of rotational symmetry polyphasic flow stream, Froude number is on the criterion of ventilation polyphasic flow stream impact and enter water multiphase development etc.Kuklinski, Kawakami have carried out a series of research to the hesitation etc. of polyphasic flow in ventilation water.The team that Arndt etc. lead is by polyphasic flow current control experimental study in large water gaging.Backer have studied the change in resistance characteristic that conical vertical enters water process.The motion conditions of cavity internal air stream field in the Gekle experimental study dark closing course of cavity, Truscott has carried out spheroid slow speed vertical and has entered water multiphase metamorphosis and polyphasic flow to the affecting laws experimental study of ball fluid power.Domestic, Chen Xin etc. have carried out a large amount of numerical value and experimental study to sail body ventilation polyphasic flow and natural polyphasic flow flow mechanism.Wang Yiwei considers the stability mechanism of ventilation local polyphasic flow based on projectile experiment and numerical evaluation.He Chuntao has carried out great many of experiments to tap web head sail body, gives the drag characteristic of cavity fluidal texture and sail body.
In sum, problem of water entry is always by one of focus and difficult point that everybody pays close attention to, and early stage enters the load of water process mainly for sail body and ballistic characteristics conducts extensive research.Along with the development of polyphasic flow drag reduction technology in water, enter water multiphase development earn widespread respect, and carried out enter water multiphase research.But be in the starting stage for the research entering the water multiphase rule of development, particularly enough understanding lacked, not for the experimental technique of this problem to the closed behavioral study entering water ventilation polyphasic flow primary growth.Subject matter is, general experiment aerating system adopts pipeline air feed accurately can control flow, but enter water experiment to be kept in motion, carry aerating system pipeline and can have a strong impact on the movement locus of model and polyphasic flow is formed, how to realize simulating in water drum into water ventilation polyphasic flow and throughput accurately determine disclose the precondition closing behavior into water ventilation polyphasic flow primary growth.So be badly in need of one to enter water ventilation experimental simulation mechanism.
Summary of the invention
The purpose of this utility model enters the closed behavior of water ventilation polyphasic flow primary growth to study sail body and provide one to enter water ventilation Multiphase Flow experimental simulation mechanism.
The purpose of this utility model is achieved in that and comprises conical gas collection cabin, be arranged on the annular seal circle of end, conical gas collection cabin, be arranged on conical end, gas collection cabin and be positioned at the airtight cover plate inside annular seal circle, the piston rod be fixedly connected with airtight cover plate center and the cavitation device be connected with the piston rod other end, the cylinder table top of hollow is also provided with outside end, described conical gas collection cabin, the circumference of the cylinder table top of described hollow is provided with at least six air holes, and interval between air hole and air hole is equal, the cylinder table top that described piston rod is positioned at hollow is inner.
The utility model also has following architectural feature:
1. there is the described air hole of at least two rows, often drain into rare six, and interval between air hole and air hole is equal.
Compared with prior art, the beneficial effects of the utility model are: the gas that the utility model is passed into by the storage of mock-up cabin section, effectively can reduce external aeration pipeline to experiment and the interference in flow field, ensure the validity of experimental simulation; High pressure by gas storage storehouse realize seal pad sealing state, simultaneously open gas storage storehouse by water impact impact loading and realize the effective ventilation when entering water.The utility model does not have aerating system pipeline, even if make the utility model enter in water experiment to be kept in motion and can not to affect the movement locus of model and the formation of polyphasic flow yet.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
Composition graphs 1, the utility model comprises conical gas collection cabin 4, be arranged on the annular seal circle 3 of end, conical gas collection cabin 4, be arranged on conical end, gas collection cabin 4 and be positioned at the airtight cover plate 7 inside annular seal circle 3, the piston rod 9 be fixedly connected with airtight cover plate 7 center and the cavitation device 1 be connected with piston rod 9 other end, the cylinder table top 8 of hollow is also provided with outside end, described conical gas collection cabin 4, the circumference of the cylinder table top 8 of described hollow is provided with at least six air holes 2, and interval between air hole and air hole is equal, the cylinder table top 8 that described piston rod 9 is positioned at hollow is inner.
The utility model can also be: have the described air hole of at least two rows, often drain into rare six, and interval between air hole and air hole is equal, and the row of air hole can need increase accordingly according to size.
The utility model be one be inserted in water ventilation experimental simulation mechanism, can simulate in water into water ventilation Multiphase Flow dynamic process.The course of work of the present utility model is mainly: before emission test, and at conical gas collection cabin 4 injecting compressed air, under compressed-air actuated High Pressure, making airtight cover plate 7 and annular seal circle 3 ensure, gas collection cabin and air hole 2 disconnect; When sail body enters water, be subject to shock load, under impact loading, the mechanism being connected with cavitation device 1 and airtight cover plate 7 moves backward, opens conical gas collection cabin 4 and air hole 2 directly passage, pressurized air is flowed out from air hole 2.In Fig. 1, double-head arrow 5 represents compressed-air actuated flow direction, and double-head arrow 6 represents the direction of motion of airtight cover plate 7.
Through calculating, water impact pressure of the present utility model is greater than the compressed air pressure in conical gas collection cabin 4, and under the effect of follow-up cavitation resistance, can maintain the opening of airtight cover plate 7, so this mechanism can realize the experimental simulation into water process ventilation cavitation.Meanwhile, very short owing to entering water process, the pressure in conical gas collection cabin 4 is almost constant in the middle of air feed process, just can design throughput accurately according to pressure and channel size.Therefore just can realize sail body by the utility model and enter the ventilation simulation of multiphase flow experiment of water process and accurately determining of throughput.
Connecting mode of the present utility model:
Cavitation device 1 and and being all threaded connection between airtight cover plate 7 and piston rod 9.
Cavitation device 1 and airtight cover plate 7 are connected by a piston rod 9, and entirety can move repeatedly.Air hole 2 is positioned on the cylinder table top 8 of the hollow before model conical section, and this table top 8 is fixedly connected with conical gas collection cabin 4 screw thread.Airtight cover plate 7 can push ahead extruding annular seal circle 3 under the pressure-air effect in conical gas collection cabin 4, the final aeroseal ensureing conical gas collection cabin 4.Under the effect of water impact pressure, cavitation device 1 and piston rod 9 move backward, open gas channel direction 5, ensure to be in sealing state before air hole simultaneously.
1) preliminary work: before emission test, at conical gas collection cabin 4 injecting compressed air, under compressed-air actuated High Pressure, making airtight cover plate 7 and annular seal circle 3 ensure, conical gas collection cabin 4 disconnects with air hole 2;
2) implement into water: when sail body enters water, be subject to shock load, under impact loading, the mechanism being connected with cavitation device 1 and airtight cover plate 7 moves backward.
3) under the effect of this mechanism, the channel opener between conical gas collection cabin 4 and air hole 2, then pressurized air flows out from air hole 2.
Claims (2)
1. one kind enters water ventilation Multiphase Flow experimental simulation mechanism, it is characterized in that: comprise conical gas collection cabin, be arranged on the annular seal circle of end, conical gas collection cabin, be arranged on conical end, gas collection cabin and be positioned at the airtight cover plate inside annular seal circle, the piston rod be fixedly connected with airtight cover plate center and the cavitation device be connected with the piston rod other end, the cylinder table top of hollow is also provided with outside end, described conical gas collection cabin, the circumference of the cylinder table top of described hollow is provided with at least six air holes, and interval between air hole and air hole is equal, the cylinder table top that described piston rod is positioned at hollow is inner.
2. one according to claim 1 enters water ventilation Multiphase Flow experimental simulation mechanism, it is characterized in that: have the described air hole of at least two rows, often drain into rare six, and interval between air hole and air hole is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520216245.8U CN204556218U (en) | 2015-04-10 | 2015-04-10 | One enters water ventilation Multiphase Flow experimental simulation mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520216245.8U CN204556218U (en) | 2015-04-10 | 2015-04-10 | One enters water ventilation Multiphase Flow experimental simulation mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204556218U true CN204556218U (en) | 2015-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520216245.8U Withdrawn - After Issue CN204556218U (en) | 2015-04-10 | 2015-04-10 | One enters water ventilation Multiphase Flow experimental simulation mechanism |
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| Country | Link |
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| CN (1) | CN204556218U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776976A (en) * | 2015-04-10 | 2015-07-15 | 哈尔滨工程大学 | Entry ventilation multiphase flow experiment simulation mechanism |
| CN111413066A (en) * | 2020-04-09 | 2020-07-14 | 西北工业大学 | Load-reducing model experiment launching device |
-
2015
- 2015-04-10 CN CN201520216245.8U patent/CN204556218U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776976A (en) * | 2015-04-10 | 2015-07-15 | 哈尔滨工程大学 | Entry ventilation multiphase flow experiment simulation mechanism |
| CN104776976B (en) * | 2015-04-10 | 2017-05-24 | 哈尔滨工程大学 | Entry ventilation multiphase flow experiment simulation mechanism |
| CN111413066A (en) * | 2020-04-09 | 2020-07-14 | 西北工业大学 | Load-reducing model experiment launching device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150812 Effective date of abandoning: 20170524 |