CN112026984B - Electrolytic microbubble stability observation test device - Google Patents
Electrolytic microbubble stability observation test device Download PDFInfo
- Publication number
- CN112026984B CN112026984B CN202010882176.XA CN202010882176A CN112026984B CN 112026984 B CN112026984 B CN 112026984B CN 202010882176 A CN202010882176 A CN 202010882176A CN 112026984 B CN112026984 B CN 112026984B
- Authority
- CN
- China
- Prior art keywords
- micro
- electrolytic
- water flow
- test piece
- observation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 20
- 239000012530 fluid Substances 0.000 claims abstract description 18
- 239000000523 sample Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000033001 locomotion Effects 0.000 claims abstract description 5
- 238000005868 electrolysis reaction Methods 0.000 claims description 16
- 238000009792 diffusion process Methods 0.000 claims description 13
- 230000033228 biological regulation Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims 1
- 229920005372 Plexiglas® Polymers 0.000 claims 1
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000009467 reduction Effects 0.000 abstract description 14
- 230000008569 process Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002131 composite material Substances 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 239000011148 porous material Substances 0.000 description 11
- 230000001603 reducing effect Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 231100000225 lethality Toxicity 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
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
-
- 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
- B63B2001/387—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction using air bubbles or air layers gas filled volumes using means for producing a film of air or air bubbles over at least a significant portion of the hull surface
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
Abstract
一种电解微气泡稳定性观测试验装置，涉及水下航行体主动式减阻技术领域，包括微气泡稳定性观测平台、电子流量计、无级调速水泵，所述微气泡稳定性观测平台内部沿流体运动方向依次设有梯形扩压段、消能孔板、蜂窝整流网、筛网、微纳凹坑电解观测试片、弹簧探针、碳棒，微气泡稳定性观测平台前端通过通水管道与电子流量计和无级调速水泵相连接，弹簧探针通过电源导线连接电源负极，碳棒连接电源正极。通过梯形扩压段、消能孔板、蜂窝整流网、筛网的稳流、消能、垂直方向整流、水平方向整流多重效果的复合作用，使得动态水流达到稳定的状态，有利于微气泡的稳定驻留及在微尺度下观测微纳凹坑中微气泡生长历程、驻留清况。
An electrolytic micro-bubble stability observation test device relates to the technical field of active drag reduction of underwater vehicles, including a micro-bubble stability observation platform, an electronic flow meter, and a stepless speed-regulated water pump. Along the fluid movement direction, there are trapezoidal diffuser section, energy dissipation orifice plate, honeycomb rectifier mesh, screen mesh, micro-nano pit electrolytic observation test piece, spring probe, carbon rod, and the front end of the micro-bubble stability observation platform passes through water. The pipeline is connected with the electronic flow meter and the stepless speed-regulated water pump, the spring probe is connected with the negative pole of the power supply through the power supply wire, and the carbon rod is connected with the positive pole of the power supply. Through the composite action of multiple effects of trapezoidal diffuser, energy dissipation orifice, honeycomb rectifier net, and screen mesh for steady flow, energy dissipation, vertical rectification, and horizontal rectification, the dynamic water flow can reach a stable state, which is conducive to the elimination of microbubbles. Stable residence and observation of the growth process and residence status of microbubbles in micro-nano pits at the micro-scale.
Description
Technical Field
The invention relates to the technical field of active drag reduction of underwater navigation bodies, in particular to an electrolytic microbubble stability observation test device.
Background
In recent years, the promotion of the propulsion speed, the maneuvering performance and the striking precision of an underwater anti-submarine battle sailing weapon becomes the key of leading sea control right in China, the underwater battle weapon (such as a torpedo) has strong concealment and large lethality, and simultaneously has accurate guidance capability, and as the attack range is below the waterline, the enemy warship fighting force can be effectively destroyed once hitting a target. In order to effectively hit the target, the speed of the underwater combat weapon must reach 1.5 times of the target speed, and the higher the speed, the stronger the hitting destructive power is, otherwise, the enemy ship cannot be hurt enough, and even cannot hit the target. The resistance borne by the underwater navigation body is about 1000 times of that of an air aircraft, and the obvious reduction of the resistance is difficult to realize by adopting the conventional method for increasing the thrust or optimizing the linearity of the aircraft at present.
The air cushion formed by the bionic groove surface and the micro-bubbles has great potential application value for flow resistance reduction, so that the micro-bubble resistance reduction technology becomes one of the research hotspots in the field of underwater resistance reduction. Currently, there are major technical bottlenecks to be broken through in researches on microbubble formation, residence control and microbubble drag reduction mechanisms. In flowing water, the growth process, stable residence and residence conditions of micro-bubbles in micro-nano pits are extremely difficult to observe under the multi-scale complex flowing environment, at present, an application type micro-bubble dynamic microscopic observation device is not available, the micro-bubble dynamic microscopic observation device can enable the micro-bubbles to stably reside in low-speed water flow and observe the growth process of the micro-bubbles in the micro-nano pits in real time under the micro-scale condition, and the residence conditions provide a certain test basis for deeply researching the residence stability and the micro-bubble resistance reduction mechanism so as to greatly reduce the underwater resistance of an underwater vehicle.
Disclosure of Invention
The invention aims to overcome the key problems that resident microbubbles are difficult to stably reside and the growth process and the residence condition of the microbubbles can be clearly observed under the microscale in the microbubble drag reduction technology, and provides an electrolytic microbubble stability observation test device which is based on multiple composite actions of steady flow, energy dissipation, rectification in the vertical direction and rectification in the horizontal direction of a trapezoidal diffusion section, an energy dissipation pore plate, a honeycomb rectification net and a screen, so that dynamic water flow reaches a stable state, the residence stability of the microbubbles is improved, the growth behavior of the microbubbles is easy to observe, and the microbubble drag reduction is realized.
The device comprises a microbubble stability observation platform, an electronic flowmeter and a stepless speed regulation water pump direct current power supply, wherein a trapezoidal diffusion section, an energy dissipation pore plate, a honeycomb rectifying net, a screen, a micro-nano pit electrolysis observation test piece, a spring probe and a carbon rod are sequentially arranged in the microbubble stability observation platform along the fluid movement direction, the front end of the microbubble stability observation platform is connected with the electronic flowmeter and the stepless speed regulation water pump through a water pipeline, the spring probe is connected with the negative electrode of the direct current power supply through a power supply lead, and the carbon rod is connected with the positive electrode of the power supply.
The microbubble stability observation platform can be made of organic glass.
The microbubble stability observation platform front end adopts trapezoidal diffusion section, and two base length can be 10~30mm, 60~80mm, and the height can be 45~65 mm.
The energy dissipation orifice plate thickness is 2~4mm, and honeycomb rectifier network thickness can be 13~26mm, and screen cloth thickness can be 2~4 mm.
The interval of energy dissipation orifice plate and honeycomb rectification net can be 40~60mm, and the interval of honeycomb rectification net and screen cloth can be 30~50 mm.
The distance between the screen and the electrolytic observation test piece is more than 50 mm.
The thickness of the micro-nano pit electrolytic observation test piece can be 10-15 mm.
The interval between the spring probe and the carbon rod can be 40-80 mm.
The length of the carbon rod can be 6mm, and the width of the carbon rod can be 6 mm;
the water flow speed of the microbubble stability observation platform can be 0-2 m/s;
the middle part of the microbubble stability observation platform is paved with a waterproof ring with the diameter of 2 mm.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
1. the invention selects organic glass to manufacture a microbubble stability observation platform, the front end of the platform is connected with an electronic flowmeter and a stepless speed regulation water pump, a trapezoidal diffusion section, an energy dissipation pore plate, a honeycomb rectifying net, a screen mesh, a micro-nano pit electrolysis observation test piece, a spring probe and a carbon rod are sequentially arranged in the platform along the fluid motion direction, the spring probe is connected with a DC power supply cathode through a power supply lead, the carbon rod is connected with a power supply anode, the spring probe is used as an electrolysis cathode, microbubbles are generated in the micro-nano pit electrolysis observation test piece through electrolyzing NaCl solution, stable flow of fluid in an electrolysis test piece placing area is realized by utilizing multiple composite rectifying effects of the trapezoidal diffusion section, the energy dissipation pore plate, the honeycomb rectifying net and the screen mesh, stable residence of the microbubbles at a certain flow speed is realized, and the permeable characteristic of the organic glass is utilized to carry out real-time dynamic observation on the electrolysis test piece area through an electronic microscope, the problem of under the prior art, microbubble is difficult to stably reside in the developments rivers, is difficult to clearly observe growth process and the condition of residing is solved, reaches stable lasting drag reduction effect.
2. The invention can stably maintain the residence of the micro-bubbles in water flow with certain flow velocity, can enhance the continuity and effectiveness of micro-bubble drag reduction, and is more beneficial to application in practical scenes.
3. The invention can realize real-time dynamic observation of the growth condition of the microbubbles in a complex flowing environment in water, and is beneficial to researching the residence stability and the drag reduction mechanism of the microbubbles.
4. The invention can control the speed of water flow by adjusting the stepless water pump, and observe the flow of the test device in real time by the electronic flowmeter, thereby realizing the observation of the residence condition of micro bubbles under different flow rates, and being suitable for the condition of low flow rate.
5. The invention uses direct current power supply to generate micro bubbles by electrolysis, does not need long-time continuous ventilation and has less energy consumption.
6. The invention can control the generating speed of the micro bubbles by adjusting the voltage, thereby reducing energy consumption and being beneficial to realizing the control of the resistance reducing effect.
Drawings
Fig. 1 is a schematic structural diagram of an electrolytic microbubble stability observation test device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a microbubble stability observation platform;
fig. 3 is a schematic diagram of the operation of the electrolytic microbubble stability observation test device.
Each of the labels in the figure is: 1-stepless speed-regulating water pump; 2-switching the valve; 3-an electronic flow meter; 4-water pipeline; 5-a trapezoidal diffusion section; 6-microbubble stability observation platform; 7-energy dissipation pore plate; 8-a cellular rectifier network; 9-a screen mesh; 10-micro-nano pit electrolytic observation test piece; 11-spring probe; 12-a carbon rod; 13-microbubbles.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention clearer and more obvious, the following embodiments will explain the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1, in this embodiment, an electrolytic microbubble stability observation test device includes a microbubble stability observation platform 6, an electronic flowmeter 3, and a stepless speed-regulating water pump 1;
the microbubble stability observation platform 6 is made of organic glass materials, and a trapezoidal diffusion section 5, an energy dissipation pore plate 7, a honeycomb rectifier net 8, a screen 9, a micro-nano pit electrolysis observation test piece 10, a spring probe 11 and a carbon rod 12 are sequentially arranged in the microbubble stability observation platform 6 along the fluid movement direction;
the front end of the microbubble stability observation platform 6 adopts a trapezoidal diffusion section 5, the length of two bottom edges is 10-30 mm, 60-80 mm, and the height is 45-65 mm.
The thickness of the energy dissipation pore plate 7 is 2-4 mm, the thickness of the honeycomb rectifying net 8 is 13-26 mm, and the thickness of the screen 9 is 2-4 mm.
The interval between the energy dissipation pore plate 7 and the honeycomb rectifying net 8 is 40-60 mm, and the interval between the honeycomb rectifying net 8 and the screen 9 is 30-50 mm.
The distance between the screen 9 and the electrolytic observation test piece 10 is more than 50 mm.
The thickness of the micro-nano pit electrolytic observation test piece 10 is 10-15 mm.
The interval between the spring probe 11 and the carbon rod 12 is 40-80 mm.
The length of the carbon rod 12 is 6mm, and the width of the carbon rod is 6 mm;
the water flow speed of the microbubble stability observation platform 6 is 0-2 m/s;
and a waterproof ring with the diameter of 2mm is laid on the outer edge of the microbubble stability observation platform 6.
As shown in fig. 1 to 3, the principle of the present invention is as follows:
1. when the device works, when water flows pass through the stepless speed regulation water pump 1 and the water pipeline 4 to enter the microbubble stability observation platform 6, the water flows firstly pass through the trapezoidal diffusion section 5, and the trend that fluid is converted into turbulent flow can be reduced to the minimum by the trapezoidal diffusion section, so that the stability of the water flow entering from the water pipeline is ensured; secondly, the water flow passes through the energy dissipation pore plate 7, and the energy dissipation pore plate 7 has the functions of eliminating most impact energy of the water flow and reducing the impact force of the water flow; then the water flows through the honeycomb rectifying net 8, and the honeycomb rectifying net 8 has the function of reducing the vertical disturbance of the incoming flow fluid, so that the fluid becomes gentle in the vertical direction; finally, the screen 9 is used for reducing the horizontal disturbance of the incoming flow fluid, so that the fluid becomes flat in the horizontal direction.
When water flows to the area where the micro-nano pit electrolysis observation test piece 10 is placed, the water flows through the flow stabilization, the energy dissipation, the vertical direction rectification and the horizontal direction rectification of the diffusion section 5, the energy dissipation pore plate 7, the honeycomb rectification net 8 and the screen 9, and the dynamic water flow reaches an extremely stable state, so that stable residence of micro-bubbles in the micro-nano pits and clear observation of growth processes and residence conditions of the micro-bubbles are facilitated.
2. When the device works, the micro-nano pit electrolysis observation test piece 10 is placed on the micro-bubble stability observation platform 6, the direct-current voltage cathode and the micro-nano pit electrolysis observation test piece 10 are conducted through the spring probe 11, the carbon rod 12 is connected to the direct-current voltage anode, and observation is carried out through the electron microscope. The gas generated at the cathode of the micro-nano pit electrolysis observation test piece 10 through the electrolysis reaction is bound by the micro-nano pit, so that micro bubbles 13 are formed, when the micro bubbles 13 are filled in the pit, the formed micro bubbles 13 can obstruct the reaction between the electrolysis test piece and the fluid solution, and the reaction is automatically terminated.
When the device works, stably-retained micro bubbles can be clearly observed above the micro-nano pit electrolytic observation test piece 10 through a microscope, so that the drag reduction effect is realized; the invention can process low-speed incoming flow, realize the rectification effect on dynamic water flow and improve the residence stability of the microbubbles 13 under the low-speed water flow. The invention can work autonomously along with the breaking or falling of the micro-bubbles 13, realizes the self-adaptive control of the micro-bubbles 13, has low energy consumption and cost, is easy to realize the application in practical engineering, and can control the generation rate of the micro-bubbles 13 by adjusting the voltage and control the flow rate of water flow by adjusting the stepless speed-adjusting water pump, thereby realizing the research on the residence condition of the micro-bubbles 13 and the resistance-reducing effect under different flow rates.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010882176.XA CN112026984B (en) | 2020-08-27 | 2020-08-27 | Electrolytic microbubble stability observation test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010882176.XA CN112026984B (en) | 2020-08-27 | 2020-08-27 | Electrolytic microbubble stability observation test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112026984A CN112026984A (en) | 2020-12-04 |
| CN112026984B true CN112026984B (en) | 2021-12-31 |
Family
ID=73585969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010882176.XA Active CN112026984B (en) | 2020-08-27 | 2020-08-27 | Electrolytic microbubble stability observation test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112026984B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323552B (en) * | 2021-11-18 | 2022-10-21 | 厦门大学 | Method for judging stability of water entering and exiting from cross-medium navigation body |
| CN114813035B (en) * | 2022-04-12 | 2023-03-21 | 厦门大学 | Thermal surface cavitation synergistic resistance reduction test device and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101486438A (en) * | 2009-03-06 | 2009-07-22 | 清华大学 | Flexible MEMS resistance reducing covering and method of manufacturing the same |
| CN101984142A (en) * | 2010-11-23 | 2011-03-09 | 浙江大学 | Device for generating single-size micro nano bubbles by micro nano probe electrolysis |
| JP2011067772A (en) * | 2009-09-26 | 2011-04-07 | Kobe Univ | Method for sterilizing water to be treated and device therefor |
| CN106370391A (en) * | 2016-08-25 | 2017-02-01 | 常州大学 | Bubble drag reduction characteristic test experiment device |
| US10203274B2 (en) * | 2006-10-06 | 2019-02-12 | California Institute Of Technology | Optical focusing inside scattering media with time-reversed ultrasound microbubble encoded (TRUME) light |
| CN111537190A (en) * | 2020-05-19 | 2020-08-14 | 水利部交通运输部国家能源局南京水利科学研究院 | Test device for flow-induced vibration of passive body of pressure high chord-thickness ratio air box |
-
2020
- 2020-08-27 CN CN202010882176.XA patent/CN112026984B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10203274B2 (en) * | 2006-10-06 | 2019-02-12 | California Institute Of Technology | Optical focusing inside scattering media with time-reversed ultrasound microbubble encoded (TRUME) light |
| CN101486438A (en) * | 2009-03-06 | 2009-07-22 | 清华大学 | Flexible MEMS resistance reducing covering and method of manufacturing the same |
| JP2011067772A (en) * | 2009-09-26 | 2011-04-07 | Kobe Univ | Method for sterilizing water to be treated and device therefor |
| CN101984142A (en) * | 2010-11-23 | 2011-03-09 | 浙江大学 | Device for generating single-size micro nano bubbles by micro nano probe electrolysis |
| CN106370391A (en) * | 2016-08-25 | 2017-02-01 | 常州大学 | Bubble drag reduction characteristic test experiment device |
| CN111537190A (en) * | 2020-05-19 | 2020-08-14 | 水利部交通运输部国家能源局南京水利科学研究院 | Test device for flow-induced vibration of passive body of pressure high chord-thickness ratio air box |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112026984A (en) | 2020-12-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112026984B (en) | Electrolytic microbubble stability observation test device | |
| CN100540397C (en) | Bionic mechanical jellyfish | |
| CN202295215U (en) | Air curtain resistance reducing device for high speed craft | |
| CN106114750A (en) | The intelligence control system compound with M ship type based on bubble drag-reduction and control method | |
| CN204514567U (en) | A kind of Ship Bubbles Wake field laboratory simulation device | |
| CN109466728A (en) | Method and system for unpowered diving and ascending motion applied to deep submersibles | |
| TW201238836A (en) | A device with microbubble-induced superhydrophobic surface for drag reduction and antifouling in seagoing ship | |
| Kumar et al. | Advances in drag-reduction methods related with boundary layer control–A review | |
| EP4019386A1 (en) | Method and device for reducing wave-making resistance and friction force during ship navigation | |
| CN111572705B (en) | Self-adaptive electrode wall micro-nano pit and micro-bubble generating device and manufacturing method thereof | |
| CN106741586A (en) | A kind of ship water jet constrains bubble drag-reduction structure | |
| Wu et al. | Model test of the surface and submerged vehicles with the micro-bubble drag reduction | |
| Han et al. | Kinematics and hydrodynamics of a dolphin in forward swimming | |
| CN104776975B (en) | A kind of Ship Bubbles Wake laboratory simulation device | |
| CN202609066U (en) | Marine high-pressure water spray driving device | |
| CN105730607A (en) | Bubble damping device used for water navigation body | |
| CN112026983B (en) | Electrode wall surface micro-pit electrolysis micro-bubble generating device based on micro-drill hole making | |
| CN107719579A (en) | A kind of design method of conical cavitation device | |
| CN109052631A (en) | The long-acting processing unit of flowable state or large-scale black and odorous water | |
| CN104032308A (en) | Anti-corrosion anti-fouling integrated control method for flow channel system of water-jet propeller | |
| CN106081033A (en) | Open up the design of bionical dolphin tail fin and performance study device passively controlled to rigidity | |
| CN205857138U (en) | A kind of combination unit for intercepting Herba Eichhorniae in navigation navigation channel | |
| CN205417989U (en) | A bubble fairing for aquatic navigation body | |
| CN205874031U (en) | Float formula gas injection oxygenation clearing machine | |
| CN101825127A (en) | Magnetic fluid controller for fluid control of boundary layer of moving object |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |