CN105857511B - Microbubble generator and the vessel by microbubbles generating means based on diffusion crushing technology - Google Patents
Microbubble generator and the vessel by microbubbles generating means based on diffusion crushing technology Download PDFInfo
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- CN105857511B CN105857511B CN201610208001.4A CN201610208001A CN105857511B CN 105857511 B CN105857511 B CN 105857511B CN 201610208001 A CN201610208001 A CN 201610208001A CN 105857511 B CN105857511 B CN 105857511B
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- shell
- bubble
- inlet pipe
- water inlet
- fluid core
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- 238000009792 diffusion process Methods 0.000 title claims abstract description 11
- 238000005516 engineering process Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 62
- 239000012530 fluid Substances 0.000 claims abstract description 38
- 238000007789 sealing Methods 0.000 claims 1
- 230000009467 reduction Effects 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 description 7
- 239000007921 spray Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000013535 sea water Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 210000000867 larynx Anatomy 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
- B63B1/32—Other means for varying the inherent hydrodynamic characteristics of hulls
- B63B1/34—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction
- B63B1/38—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction using air bubbles or air layers gas filled volumes
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
Abstract
The invention discloses a kind of microbubble generator, including bubble spout, fluid core, shell and end cap；Water inlet is offered on described shell or end cap.Fluid core is in hollow fusiformis structure, and is surround in cross-sectional diameter maximum and offer steam vent；Fluid core is positioned in bubble generator shell；By end cap seal, the other end is the bubble spout being connected with the external world for shell one end.Ton vessel by microbubbles generating means based on diffusion crushing technology, including water inlet pipe, filter, water pump, connection flexible pipe, microbubble generator, air inlet pipe and air blower；Water inlet pipe is connected with water pump, and water inlet pipe is provided with filter；Water pump is connected by connection flexible pipe with the water inlet of microbubble generator；The air inlet of microbubble generator is connected by air inlet pipe with air blower.Instant invention overcomes be difficult to meet the problem of bubble diameter is small and large-minded and manufacturing cost is high, manufacture is difficult simultaneously present in existing Drag Reduction by Bubble Curtain.
Description
Technical field
The invention belongs to ship air curtain drag reduction field, large-sized low-speed cargo ship is mainly directed towards, and in particular to a kind of microbubble
Generator and the vessel by microbubbles generating means based on diffusion crushing technology.
Background technology
Shipping is most important means of transportation in international logistics, using cargo ship, oil tanker, container ship as the large-scale of representative
Cargo ship assume responsibility for the Circulation of the resource such as the ore more than 90%, oil, goods in the world, this kind of shipping sail speed
Low, wave making resistance very little, viscous drag accounts for the 70%-80% of drag overall, and shipping can be greatlyd save by reducing viscous drag
Oil consumption.
Ship Drag Reduction by Bubble Curtain is alow to form a micro-bubbles with a large amount of microbubbles, upsets primary side interlayer
Fluid behaviour.Hull is separated from water by it to a certain extent, using the physical difference of air and water, can effectively reduce water and ship
The shear stress of wall.With reference to Ship model test data both domestic and external, drag reducing efficiency is up to 10%-30%, and optional equipment power
The 1%-3% of shipowner's acc power is often only accounted for, the potentiality for there are huge energy-saving and emission-reduction.
Existing air curtain Research of Drag Reduction focuses mostly in ship form design, generator arrangement etc., and research occurs seldom to bubble,
Bubble is produced using porous plate air blast mostly, this mode process it is more convenient, but using between sintered porous plate adjacent cells
Spray bubble to influence each other polymerization, caused bubble diameter is larger；Jet resistance is larger simultaneously, the increase of air blower wasted work, effect
It is undesirable, hinder the practical application of Drag Reduction by Bubble Curtain.The defects of other correlation techniques and actual application are as follows：Change
Learn reaction method：Cost is high, easily causes the secondary pollution of water body, is not suitable for directly using in natural water.Electrolysis：Produce
Microbubble power consumption is high, and bubble yield is small, is unfavorable for popularization and application in actual industrial production.Dispersion air method：High-power and high-speed
Motor realizes shear agitation, and the manufacture of equipment requires higher, and difficulty of processing is larger.
Effectively to consider actual demand of the ship air curtain drag reduction to bubble generator --- required large-minded, bubble diameter
It is small and low in energy consumption, it can just design the more preferable device for being applied to ship, it is therefore necessary to which existing device is improved.
The content of the invention
It is an object of the invention to solve problems of the prior art, and provide a kind of microbubble generator.
To achieve the above object, the technical solution adopted in the present invention is as follows：
A kind of microbubble generator, including bubble spout, fluid core, shell and end cap；Opened on described shell or end cap
Provided with water inlet；Diametrically hollow fusiformis structure small in the end and big in the middle, its body are provided with air inlet to described fluid core,
And it is surround in cross-sectional diameter maximum and offers steam vent；Fluid core is positioned in bubble generator shell, makes to remove in shell
The cross-sectional area in the space outside fluid core is gradually reduced from both ends to centre；Described shell one end is another by end cap seal
Hold the bubble spout to be connected with the external world.
It is mostly that centralized cylinder is distributed relative to throat's design relatively conventional at present, such as Venturi tube.Circulating on an equal basis
Under area, the wetted perimeter of centralized configuration is small, and the quantity of fumarole can not be too many, and arrangement is also compact.Pass through this knot
When structure is to throat's ejection bubble, also easily interfered between each spray orifice, therefore be not suitable for ship to need the occasion of a large amount of jets.This
Designed using ring-like throat to innovation, doubled with homalographic lower larynx portion section wetted perimeter, micropore arranges more scattered, phase
The possibility that interference polymerization occurs for the bubble that adjacent micropore sprays is lower, can design greater number and the micropore of form, meet ship
Broad-minded actual demand in air curtain drag reduction.Meanwhile designed compared to centralized throat, the exit region of each spray orifice of the device
More narrow, disturbance is more violent, is easy to the secondary of diffuser to tear up.
Concern in the prior art to ship air curtain drag reduction bubble generator and bubble acceptable level is considerably less.This cause with
Lower problem：One, in order to reach more qualified bubble, using complicated unmanageable design structure, device energy-wasting is more, jet amount by
Limit is serious and effect is poor.Or move back and ask secondary, expand jet aperture, cause bubble diameter not meet the concept of Friction Reduction by Micro-bubbles,
The result tested does not have too many associated reference to be worth in Drag Reduction by Bubble Curtain.
The present invention actually considers above contradiction, innovatively applies bubbles burst theory in turbulent flow, violent by pressure difference
The diffuser design of change, makes the kinetic energy of throat's fluid be quickly converted to pressure energy, forms vigorous turbulent area.In turbulence
In the case of, the influence of bubble surface pressure fluctuation has exceeded the influence of bubble surface tension force, and obvious rupture occurs for bubble,
The bubble that throat sprays is smashed again, the requirement of air curtain drag principle is met with bubble diameter caused by guarantee.
Preferably, described fluid core and shell are coaxially disposed, space in shell in addition to fluid core is along fluid core
It is substantially symmetrical about its central axis, be more uniformly distributed the generation of current and bubble
Another object of the present invention is to provide a kind of ton vessel by microbubbles based on diffusion crushing technology to fill
Put, including water inlet pipe, filter, water pump, connection flexible pipe, microbubble generator, air inlet pipe and air blower；Described water inlet pipe
It is connected with water pump, and water inlet pipe is provided with filter；Water pump is connected by connection flexible pipe with the water inlet of microbubble generator；
The air inlet of microbubble generator is connected by air inlet pipe with air blower.Filter filters out the impurity in seawater, avoids blocking up
Fill in the stomata on water pipe or fluid core annular throat.Used microbubble generator, including it is bubble spout, fluid core, outer
Shell and end cap；Water inlet is offered on described shell or end cap；Described fluid core is diametrically small in the end and big in the middle hollow
Fusiformis structure, its body is provided with air inlet, and is surround in cross-sectional diameter maximum and offer steam vent；Fluid core is positioned over
In bubble generator shell, the cross-sectional area in the space in shell in addition to fluid core is set to be gradually reduced from both ends to centre；Institute
By end cap seal, the other end is the bubble spout being connected with the external world for the shell one end stated.
Preferably, described connection flexible pipe has 3, and water inlet has 3, is arranged in equilateral triangle on end cap,
And be connected by four-way connection with water pump,.
Preferably, described connection flexible pipe is provided with the first electromagnetic flowmeter for being used for measuring water velocity.
Preferably, described air inlet pipe is provided with the second electromagnetic flowmeter for being used for measuring air velocity.
Electromagnetic flowmeter is respectively mounted in air inlet pipe and water inlet pipe, for measuring gas flow rate and water inlet flow velocity, is easy to control
Flow velocity processed reaches best drag-reduction effect.
The present invention is according to bulk transport ship based on viscous drag, and large-minded needed for drag reduction, diameter is small, installation power is small
The features such as simple as possible is processed with design, with reference to air curtain drag reduction, turbulent flow bubble breaking scheduling theory, for domestic and international research model
Advantage and disadvantage, it is proposed that the annular throat jet area and second-time breakage diffusion area of device different from the past, can more preferably be bonded shipping
Actual demand and feature.Thus, overcome be difficult to meet simultaneously present in existing Drag Reduction by Bubble Curtain bubble diameter it is small and
The problem of large-minded and manufacturing cost is high, manufacture is difficult.
Brief description of the drawings
Fig. 1 is bubble generator profile；
Fig. 2 is the fluid cored structure schematic diagram of the present invention；
Fig. 3 is the end cover structure schematic diagram of the present invention；
Fig. 4 is the bubble spout structure schematic diagram of the present invention；
Fig. 5 is vessel by microbubbles generating means structural representation；
In figure：1- water inlet pipes, 2- filters, 3- water pumps, 4- electromagnetic flowmeters, 5- four-way connections, 6- connection flexible pipes, 7-
Bubble spout, 8- bubble generator fluid cores, 9- bubble generator shells, 10- end caps, 11- air inlet pipe, 12- electromagnetic flowmeters,
13- air blowers
Embodiment
The present invention is further elaborated and illustrated with reference to the accompanying drawings and examples.Each embodiment in the present invention
Technical characteristic can carry out respective combination on the premise of not colliding with each other.
As illustrated in fig. 1 and 2, a kind of microbubble generator, including bubble spout 7, fluid core 8, shell 9 and end cap 10；Institute
Water inlet is offered on the shell 9 or end cap 10 stated；Described fluid core 8 diametrically hollow fusiformis knot small in the end and big in the middle
Structure, its body is provided with air inlet, and is surround in cross-sectional diameter maximum and offer steam vent.Fluid core 8 is positioned over bubble
In generator shell 9, the cross-sectional area in the space in shell 9 in addition to fluid core 8 is set to be gradually reduced from both ends to centre；It is described
The one end of shell 9 sealed by end cap 10, the other end is and the extraneous bubble spout 7 being connected.Fluid core 8 and shell 9 are coaxially disposed,
Space in shell 9 in addition to fluid core 8 is along the substantially symmetrical about its central axis of fluid core 8.As shown in figure 4, the end of fluid core 8 can pass through branch
Frame is fixed on shell 9, but need to reserve the passage that current pass through.
Above-mentioned microbubble generator is installed on steamer, further devises a kind of ten thousand tons based on diffusion crushing technology
Level vessel by microbubbles generating means.As shown in figure 5, device include water inlet pipe 1, filter 2,3,3 connection flexible pipes 6 of water pump,
Foregoing microbubble generator, air inlet pipe 11 and air blower 13；Described water inlet pipe 1 is connected with water pump 3, and water inlet pipe 1
It is provided with filter 2.As shown in figure 3, water pump 3 is connected by 3 connection flexible pipes 6 with 3 water inlets of microbubble generator.
Water inlet is arranged on end cap 10 in equilateral triangle.The air inlet of microbubble generator passes through air inlet pipe 11 and the phase of air blower 13
Even.Connection flexible pipe 6 is provided with the first electromagnetic flowmeter 4 for being used for measuring water velocity.Air inlet pipe 11, which is provided with, to be used to measure air-flow
Second electromagnetic flowmeter 12 of speed.
In use, bubble generator is disposed vertically in hull bottom, upward, bottom covers the bubble spray of hull bottom just for end cap side
Mouthful, caused microbubble is all emerged and be covered in hull bottom.Adjustable water pump 3 sucks seawater, filtering dress by water inlet pipe 1
Put 2 and filter out impurity in seawater, avoid blocking the stomata on water pipe or the annular throat of fluid core 8.Water pump 3 connects by four
First 5 and three connection flexible pipes 6 seawater is pumped into bubble generator with certain speed.While water pump 3 works, air blower 13
Air is blasted inside fluid core 8 with certain speed by air inlet pipe 11.Electromagnetic flowmeter 4 and electromagnetic flowmeter 12 measure respectively
Water speed and air velocity, it is easy to the regulation of water pump 3 and air blower 13, drag-reduction effect is reached optimal.
Bubble generator is divided into inlet segment, gas injection section, three parts of diffuser along water velocity direction.When the normal work of device
When making, the current to be pressurizeed through water pump 3 enter flow forward inside device, and with the reduction of cross-sectional area, water velocity gradually increases
Add, into gas injection section.The gas injection section part of fluid core 8 is provided with stomata, the air to be pressurizeed through air blower 13, into hollow fluid
Core 8, injected by the stomata on core wall in water, form a succession of minute bubbles.Diffuser flow section gradually increases, mixing wastewater with air
Logistics is shredded through producing strong turbulent flow, the minute bubbles mixed in water during the active section, forms microbubble.Microbubble passes through ship
The bubble spout 7 at bottom is emerged, and is covered in hull bottom with current, is alow formed bubble layer, so as to reach drag-reduction effect.
Embodiment described above is a kind of preferable scheme of the present invention, and so it is not intended to limiting the invention, all
The technical scheme for taking the mode of equivalent substitution or equivalent transformation to be obtained, all falls within protection scope of the present invention.
Claims (6)
1. a kind of microbubble generator, it is characterised in that including bubble spout（7）, fluid core（8）, shell（9）And end cap
（10）；Described shell（9）Or end cap（10）On offer water inlet；Described fluid core（8）It is diametrically small in the end and big in the middle
Hollow fusiformis structure, its body is provided with air inlet, and in cross-sectional diameter maximum around offering steam vent；Fluid core
（8）It is positioned over bubble generator shell（9）It is interior, make shell（9）It is interior to remove fluid core（8）Outside space cross-sectional area by both ends
It is gradually reduced to centre；Described shell（9）One end is by end cap（10）Sealing, the other end are the bubble spout being connected with the external world
（7）.
2. microbubble generator as claimed in claim 1, it is characterised in that described fluid core（8）And shell（9）Coaxially set
Put, shell（9）It is interior to remove fluid core（8）Outside space along fluid core（8）It is substantially symmetrical about its central axis.
3. a kind of ton vessel by microbubbles generating means based on diffusion crushing technology, it is characterised in that including water inlet pipe
（1）, filter（2）, water pump（3）, connection flexible pipe（6）, microbubble generator as claimed in claim 1, air inlet pipe（11）
And air blower（13）；Described water inlet pipe（1）With water pump（3）It is connected, and water inlet pipe（1）It is provided with filter（2）；Water pump
（3）Pass through connection flexible pipe（6）It is connected with the water inlet of microbubble generator；The air inlet of microbubble generator passes through air inlet pipe
（11）With air blower（13）It is connected.
4. the ton vessel by microbubbles generating means based on diffusion crushing technology as claimed in claim 3, it is characterised in that
Described connection flexible pipe（6）There are 3, and water inlet there are 3, and end cap is arranged in equilateral triangle（10）On, and pass through four-way
Joint（5）With water pump（3）It is connected.
5. the ton vessel by microbubbles generating means based on diffusion crushing technology as claimed in claim 3, it is characterised in that
Described connection flexible pipe（6）Provided with the first electromagnetic flowmeter for measuring water velocity（4）.
6. the ton vessel by microbubbles generating means based on diffusion crushing technology as claimed in claim 3, it is characterised in that
Described air inlet pipe（11）It is provided with the second electromagnetic flowmeter for being used for measuring air velocity（12）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610208001.4A CN105857511B (en) | 2016-04-05 | 2016-04-05 | Microbubble generator and the vessel by microbubbles generating means based on diffusion crushing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610208001.4A CN105857511B (en) | 2016-04-05 | 2016-04-05 | Microbubble generator and the vessel by microbubbles generating means based on diffusion crushing technology |
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| Publication Number | Publication Date |
|---|---|
| CN105857511A CN105857511A (en) | 2016-08-17 |
| CN105857511B true CN105857511B (en) | 2017-11-14 |
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| CN201610208001.4A Expired - Fee Related CN105857511B (en) | 2016-04-05 | 2016-04-05 | Microbubble generator and the vessel by microbubbles generating means based on diffusion crushing technology |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110962991A (en) * | 2019-12-28 | 2020-04-07 | 大连渔轮有限公司 | Method and device for reducing wave-making resistance and friction force of ship during navigation |
| CN111746710B (en) * | 2020-06-03 | 2022-03-11 | 武汉理工大学 | Ship drag reduction system based on waste gas utilization |
| CN111746711B (en) * | 2020-06-03 | 2022-03-01 | 武汉理工大学 | Marine microbubble generating device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4196686A (en) * | 1978-01-16 | 1980-04-08 | The United States Of America As Represented By The Secretary Of The Navy | Surface effect ship internal sidewall drag reduction device |
| CN2652812Y (en) * | 2003-10-17 | 2004-11-03 | 武汉理工大学 | Resistance reducing micro bubble generator |
| CN201520395U (en) * | 2009-09-22 | 2010-07-07 | 武汉理工大学 | Bubble drag reduction subdivision variable-pressure air injection device |
| CN103241341A (en) * | 2013-05-22 | 2013-08-14 | 上海交通大学 | High-speed catamaran |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08225094A (en) * | 1995-02-21 | 1996-09-03 | Yoji Kato | Microbubble generating device |
| KR101193962B1 (en) * | 2012-01-03 | 2012-10-24 | 주식회사 동신이엔텍 | Frictional-resistance reduced ship and appartus for reducing fritional-resistance of ship |
-
2016
- 2016-04-05 CN CN201610208001.4A patent/CN105857511B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4196686A (en) * | 1978-01-16 | 1980-04-08 | The United States Of America As Represented By The Secretary Of The Navy | Surface effect ship internal sidewall drag reduction device |
| CN2652812Y (en) * | 2003-10-17 | 2004-11-03 | 武汉理工大学 | Resistance reducing micro bubble generator |
| CN201520395U (en) * | 2009-09-22 | 2010-07-07 | 武汉理工大学 | Bubble drag reduction subdivision variable-pressure air injection device |
| CN103241341A (en) * | 2013-05-22 | 2013-08-14 | 上海交通大学 | High-speed catamaran |
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Inventor after: Wang Tao Inventor after: Tang Hairong Inventor after: Wang Ben Inventor after: Wu Siyuan Inventor after: Xu Liangju Inventor after: Han Ting Inventor before: Tang Hairong Inventor before: Wang Ben Inventor before: Wu Siyuan Inventor before: Xu Liangju Inventor before: Han Ting Inventor before: Wang Tao |
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