CN206318739U - A kind of Strong shear formula central jet cavitation generator - Google Patents
A kind of Strong shear formula central jet cavitation generator Download PDFInfo
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- CN206318739U CN206318739U CN201621409958.7U CN201621409958U CN206318739U CN 206318739 U CN206318739 U CN 206318739U CN 201621409958 U CN201621409958 U CN 201621409958U CN 206318739 U CN206318739 U CN 206318739U
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- cavitation
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- strong shear
- backwater cavity
- shear
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Abstract
The utility model discloses a kind of Strong shear formula central jet cavitation generator, including high-pressure feed water pipe, nozzle, backwater cavity, baffle plate, go out flow chamber, outflow tube.Pressurized working fluid pressure energy is converted into kinetic energy by the device using nozzle, forms high-speed jet.Strengthen the turbulent fluctuation of high-velocity fluid using jet expansion inner edge annular boss.Using backwater cavity trunnion and baffle effect formation backflow and jet expansion between trunnion entrance with center high-speed jet formed Strong shear effect, and then form Strong shear cavitation, subsequent Strong shear Cavitation flows along backwater cavity conical pipe when moving due to the increase of confined pressure, vacuole therein is crumbled and fall under elevated pressures effect, shock wave and microjet are formed, while producing HTHP.Compared with same type shear cavitation generator, the utility model shear layer is bigger, and speed difference is bigger, and shear action is stronger；Compared with existing cavitation device, more preferably, cavitation intensity is higher for the utility model cavitation effect.
Description
Technical field
The utility model belongs to Hydrodynamic Cavitation Technology field, and in particular to a kind of Strong shear formula central jet cavitation occurs
Device.
Background technology
Hydrodynamic cavitation be because hydrodynamic factor is acted on and in liquid internal or the liquid occurred in liquid and solid interface
The phase transition process and phenomenon of body and its steam.When vacuole is come into being, developed, crumbling and fall in cavitating flows exclusive physical characteristic and its lure
Unique chemical characteristic of artificial delivery life can by it is effective with terms of food industry, bioengineering and drinking water disinfection, example
Such as sewage disposal and disinfection.
Existing Hydrodynamic cavitation is mainly realized by orifice plate, Venturi tube, injection stream etc..And orifice plate and Venturi tube etc.
The cavitation generator cavitation of structure occurs longer to the process crumbled and fall, and cavitation generation area confined pressure is smaller, and cavitation effect is poor, empty
Change intensity weaker.Similar injection stream cavitation generator shear effect is not strong, still there is larger improvement space.
Therefore during Hydrodynamic cavitation, the structure design of cavitation generator is most important, is directly connected to cavitation effect.
Need to provide a kind of cavitation efficiency high, cavitation effect good cavitation generator.
Utility model content
Technical problem to be solved in the utility model is：Propose that a kind of shear effect is good, cavitation effect can be increased substantially
The cavitation generator of fruit.
In order to solve the above technical problems, the utility model provides a kind of Strong shear formula central jet cavitation generator, its
Concrete technical scheme is as follows：
A kind of Strong shear formula central jet cavitation generator, including outflow tube and the high pressure that sequentially coaxially connects and communicate to
Water pipe, go out flow chamber, tubulose backwater cavity；The outflow tube is connected with going out flow chamber；The backwater cavity outer end is provided with baffle plate；The height
Pressure feed pipe water side is located in flow chamber；The high-pressure feed water pipe water side is provided with nozzle；The backwater cavity is toward baffle plate side
To conical pipe and trunnion including being sequentially communicated；The nozzle outlet end is located in the conical pipe of backwater cavity.
The nozzle is gradually reduced along its water (flow) direction internal diameter, is conical section；The nozzle outlet end is provided with straight length；
The boss of oriented central axis direction protrusion is set at the straight length liquid outlet.
The throat inner radius is more than nozzle outlet end internal diameter.
The high-pressure feed water pipe and go out between flow chamber, go out between flow chamber and backwater cavity, can be used between backwater cavity and baffle plate
A variety of connected modes, such as not impact effect, flange bolt are connected.
The outflow tube can use a variety of connected modes with going out flow chamber, not impact effect, such as welding manner.
The high-pressure feed water pipe can use a variety of connected modes with nozzle, not impact effect, such as be threadedly coupled.
Working fluid of the present utility model enters nozzle through high-pressure feed water pipe, reduces through cross section of fluid channel during nozzle, and flow velocity increases
Greatly, pressure reduces, in jet expansion to spray at a high speed, into backwater cavity, while the annular boss in jet expansion inner edge is acted on
Under, turbulent fluctuation is greatly improved around the high-velocity fluid of injection, the plugging action of diffusion and backwater cavity and baffle plate due to jet,
There is congestion in backwater cavity trunnion section in fluid, and local pressure increase, core flow is pressed against pipeline side wall, and flow back in a ring to
Trunnion section entrance motion.When annular return from trunnion section project when, with center high-speed jet jet expansion to trunnion entrance it
Between occur Strong shear effect, with the increase of speed difference, shear action enhancing.Due to high intensity vortex structure in shear layer, especially
It is the Turbulent Coherent Structures for occurring vorticity aggregation in shear layer, and turbulent flow pressure fluctuation, make flow field Local Minimum pressure far low
In saturated vapor pressure, so as to cause high-intensity cavitation.Subsequent Strong shear cavitation flows to conical pipe motion, and confined pressure increase is empty
Bubble is rapid to crumble and fall under high pressure effect, shock wave and microjet is formed, while producing HTHP.Sent out with same type shear cavitation
Raw device is compared, and the utility model shear layer is bigger, and speed difference is bigger, and shear action is stronger, and the energy that cavitation discharges after crumbling and fall is more
It is high；Compared with existing cavitation device, more preferably, cavitation intensity is higher for the utility model cavitation effect.
The beneficial effects of the utility model are：
1st, high-pressure fluid is accelerated by nozzle, annular boss enhancing fluid turbulent fluctuation in jet expansion inner edge goes out in nozzle
Mouthful center high-speed jet is formed, it is poor to improve jet shear rate, improves shear effect；Sealed by backwater cavity trunnion and baffle plate
Stifled effect forms backflow, in jet expansion to Strong shear effect is produced between trunnion entrance with high-speed central jet, produces violent
Cavitation；
2nd, by keeping the suitable distance of jet expansion and trunnion entrance（0.5~1 times of throat inner radius）Penetrate jet expansion
Stream can be contacted fully with trunnion backflow, is produced Strong shear effect, is strengthened cavitation effect；
3rd, the annular diffuser that outer nozzle wall face and backwater cavity conical pipe are surrounded reduces Cavitation flows flow velocity, confined pressure increase,
And then vacuole is crumbled and fall under high pressure effect, shock wave and microjet are formed, HTHP is produced.
Brief description of the drawings
Fig. 1 is the utility model structural representation；
Fig. 2 is the utility model nozzle interior structure enlarged diagram；
Fig. 3 is the utility model backwater cavity structural representation；
Wherein, 1- high-pressure feed waters pipe, 2- goes out flow chamber, 3- outflow tubes, 4- nozzles, 5- backwater cavities, 6- baffle plates；41- conical sections,
42- straight lengths, 43- boss；51- conical pipes, 52- trunnions.
Embodiment
A kind of Strong shear formula central jet cavitation generator, including outflow tube 3 and the high pressure that sequentially coaxially connects and communicate
Feed pipe 1, go out flow chamber 2, tubulose backwater cavity 5；The outflow tube 3 is connected with going out flow chamber 2；The outer end of backwater cavity 5 is provided with gear
Plate 6；The water side of high-pressure feed water pipe 1 is located in flow chamber 2；The water side of high-pressure feed water pipe 1 is provided with nozzle 4；It is described
Conical pipe 51 and trunnion 52 that backwater cavity 5 includes being sequentially communicated toward the direction of baffle plate 6；The outlet end of nozzle 4 is located at backwater cavity 5
In conical pipe 51.
The nozzle 4 is gradually reduced along its water (flow) direction internal diameter, is conical section 41；The outlet end of nozzle 5 is provided with directly
Pipeline section 42；The boss 43 of oriented central axis direction protrusion is set at the liquid outlet of straight length 42.
The internal diameter of trunnion 52 is more than the outlet end internal diameter of nozzle 4.
The high-pressure feed water pipe 1 and go out between flow chamber 2, go out between flow chamber 2 and backwater cavity 5, between backwater cavity 5 and baffle plate 6
A variety of connected modes can be used, not impact effect, be connected in the present embodiment using flange.
The outflow tube 3 can use a variety of connected modes with going out flow chamber 2, not impact effect, using welding in the present embodiment
Mode is connected.
The high-pressure feed water pipe 1 can use a variety of connected modes with nozzle 4, not impact effect, and spiral shell is used in the present embodiment
Line is connected.
As shown in figure 1, a kind of Strong shear formula central jet cavitation generator is present embodiments provided, wherein, the high pressure
Feed pipe 1 is used for conveying high-pressure working fluid；Pressurized working fluid pressure energy is converted into kinetic energy by the nozzle 4, and passes through it
Exporting inner edge annular boss strengthens the turbulent fluctuation of eject fluid；The backwater cavity 5 is used to flow back in trunnion formation and backflow is existed
Jet expansion forms violent cavitation, while backwater cavity conical pipe to Strong shear effect is produced between trunnion entrance with high-speed jet
The annular diffuser formed with outer nozzle wall face will make the cavitation bubble of generation be crumbled and fall in the case where being acted on compared with high confining pressure, form shock wave
And microjet, while producing HTHP；The baffle plate 6 is used to block the throat section of backwater cavity 5, produces congestion and forms backflow；
It is described go out flow chamber 2 be connected with outflow tube 3, as fluid convey transitional region, play current stabilization effect；The outflow tube 3 is used for defeated
Send out stream fluid.
Described throat pipe diameter is more than nozzle outlet diameter, and the length of conical pipe ensures jet expansion in the device that assembles
It is equal to 0.5~1 times of throat inner radius with the distance of trunnion entrance and jet expansion is in conical pipe；Throat section is cooperateed with baffle plate to be made
Backflow is produced with lower, retroeflection stream produces reverse Strong shear with high-velocity fluid outside trunnion entrance and acted on, and induction produces violent cavitation；
The annular denuder that backwater cavity conical pipe is formed with outer nozzle wall face will make the cavitation bubble of generation be burst under elevated pressures effect
Go out, form shock wave and microjet, while producing HTHP.
The cavitation generator that the utility model is provided can pass through various flow medias, it is adaptable to various fields, for example,
To in the processing procedure of sewage, the utility model can utilize having in the specific physical chemical effect degraded sewage of cavitation generation
Machine thing, plays a part of purifying sewage.For example, in terms of to drinking water disinfection sterilization, the cavitation that the utility model is provided occurs
The violent cavitation that device is produced can effectively destroy the microorganism structure such as bacterium, change its living space, make microorganism dead.
Different fitting structures can use connected mode not of the same race in the utility model, not interfere with the effect of utility model.
Although this specification has more used 1- high-pressure feed water pipes, 2- goes out flow chamber, 3- outflow tubes, 4- nozzles, 5- backwater
Chamber, 6- baffle plates；41- conical sections, 42- straight lengths, 43- boss；51- conical pipes, the term such as 52- trunnions, but be not precluded from using
The possibility of other terms.Using these terms just for the sake of more easily describing essence of the present utility model, they are solved
Any additional limitation is interpreted into all to disagree with the utility model spirit.
It should be appreciated that the part that this specification is not elaborated belongs to prior art.
Specific embodiment described herein is only to the utility model spirit explanation for example.The utility model institute
Category those skilled in the art can make various modifications or supplement or using similar to described specific embodiment
Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.
Claims (4)
1. a kind of Strong shear formula central jet cavitation generator, it is characterised in that：Including outflow tube（3）Sequentially coaxially connect simultaneously
The high-pressure feed water pipe communicated（1）, go out flow chamber（2）, tubulose backwater cavity（5）；The outflow tube（3）With going out flow chamber（2）Connection；It is described
Backwater cavity（5）Outer end is provided with baffle plate（6）；The high-pressure feed water pipe（1）Water side is located at flow chamber（2）It is interior；The high pressure is given
Water pipe（1）Water side is provided with nozzle（4）；The backwater cavity（5）Toward baffle plate（6）Direction includes the conical pipe being sequentially communicated（51）
And trunnion（52）；The nozzle（4）Outlet end is located at backwater cavity（5）Conical pipe（51）It is interior.
2. Strong shear formula central jet cavitation generator as claimed in claim 1, it is characterised in that：The nozzle（4）Along it
Water (flow) direction is gradually reduced for internal diameter, is conical section（41）；The nozzle（4）Outlet end is provided with straight length（42）；It is described straight
Pipeline section（42）The boss of oriented central axis direction protrusion is set at liquid outlet（43）.
3. Strong shear formula central jet cavitation generator as claimed in claim 1, it is characterised in that：The trunnion（52）Internal diameter
More than nozzle（4）Outlet end internal diameter.
4. Strong shear formula central jet cavitation generator as claimed in claim 1, it is characterised in that：The nozzle（4）Go out liquid
End is 0.5~1 times of throat inner radius with trunnion entrance distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621409958.7U CN206318739U (en) | 2016-12-21 | 2016-12-21 | A kind of Strong shear formula central jet cavitation generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621409958.7U CN206318739U (en) | 2016-12-21 | 2016-12-21 | A kind of Strong shear formula central jet cavitation generator |
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| CN206318739U true CN206318739U (en) | 2017-07-11 |
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| CN201621409958.7U Active CN206318739U (en) | 2016-12-21 | 2016-12-21 | A kind of Strong shear formula central jet cavitation generator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106517412A (en) * | 2016-12-21 | 2017-03-22 | 武汉大学 | Strong shear type central jet cavitation generator |
| CN107884427A (en) * | 2017-11-09 | 2018-04-06 | 北京理工大学 | Gas content measuring system in a kind of bubbling crystallzation bubble based on circulating water tunnel |
| CN115111972A (en) * | 2022-08-30 | 2022-09-27 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Self-service air film damping device for high-speed underwater projectile body |
-
2016
- 2016-12-21 CN CN201621409958.7U patent/CN206318739U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106517412A (en) * | 2016-12-21 | 2017-03-22 | 武汉大学 | Strong shear type central jet cavitation generator |
| CN107884427A (en) * | 2017-11-09 | 2018-04-06 | 北京理工大学 | Gas content measuring system in a kind of bubbling crystallzation bubble based on circulating water tunnel |
| CN115111972A (en) * | 2022-08-30 | 2022-09-27 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Self-service air film damping device for high-speed underwater projectile body |
| CN115111972B (en) * | 2022-08-30 | 2022-11-01 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Self-service air film damping device for high-speed underwater projectile body |
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