CN117901991A - High-order submarine tank suitable for bubble drag reduction system - Google Patents
High-order submarine tank suitable for bubble drag reduction system Download PDFInfo
- Publication number
- CN117901991A CN117901991A CN202311452913.2A CN202311452913A CN117901991A CN 117901991 A CN117901991 A CN 117901991A CN 202311452913 A CN202311452913 A CN 202311452913A CN 117901991 A CN117901991 A CN 117901991A
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- China
- Prior art keywords
- bubble
- opening
- hull
- submarine tank
- tank
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- 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.)
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Links
- 239000013535 sea water Substances 0.000 claims abstract description 38
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 230000035699 permeability Effects 0.000 claims 2
- 238000013022 venting Methods 0.000 claims 1
- 238000009423 ventilation Methods 0.000 abstract description 36
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000003993 interaction Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
Abstract
The utility model provides a high-order submarine tank suitable for bubble drag reduction system, vertical being provided with two hull structures in the high-order submarine tank, all there is the interval between two hull structures, between hull structure and the sea water house steward, forms three case rooms, and the both ends respectively are provided with a ventilative point about every case room top, and ventilative point is bubble capture nozzle stub, stop valve, ventilation pipe from bottom to top in proper order, and bubble capture nozzle stub diameter is greater than the ventilation pipe diameter. Two hull structures are respectively provided with an opening, namely a first opening and a second opening, and the first opening and the second opening are arranged in a vertically staggered mode. The invention effectively avoids the air bubbles entering the seawater system, provides a new design scheme of the submarine tank aiming at the risk of the air bubbles entering the submarine tank of the air bubble drag reduction system, and avoids the risk of the air bubbles generated by the air bubble drag reduction system entering the seawater main pipe by optimizing the structure and arrangement inside the submarine tank.
Description
Technical Field
The invention belongs to the field of ship construction and design, and particularly relates to a high-level submarine tank suitable for a bubble drag reduction system.
Background
The bubble drag reduction system is a new energy-saving technology which is popular recently, the basic principle is that compressed air is blown to sea water by an air compressor, a large amount of bubbles are generated in the sea water, the bubbles can be attached to a ship bottom structure, the ship navigation resistance is reduced, the navigation speed is improved, the load of a host machine is reduced, and finally the purpose of reducing the ship navigation cost is achieved. In the real ship project, a bubble drag reduction system is adopted, but in the running process of the bubble drag reduction system, a large amount of bubbles can be generated at the bottom of the ship, and the bubbles move towards the stern along with the ship body in a linear manner.
Under the condition, part of bubbles can enter the high-level submarine tank through the opening of the hull structure, and the bubble state in the high-level submarine tank mainly has the following characteristics:
1. the air bubble entering amount is large. Because the bubble drag reduction system continuously runs, a large amount of bubbles continuously flow into the high-level submarine tank, and compared with the low-level submarine tank, the high-level submarine tank is slightly high in height, and more bubbles are easy to inhale. In the conventional ventilation scheme of the high-level submarine tank, only 1 ventilation pipeline is arranged on the side of the submarine, and a large amount of air bubbles entering the scheme cannot be timely discharged;
2. the bubbles are trapped in the dead corners of the structure. The structure plates which are applicable to expanding the side boundary of the midship of the high-level submarine tank of the bubble drag reduction system towards the midship direction and guiding water flow to flow roundabout up and down are longitudinally distributed, so that a plurality of longitudinally narrow structural dead angles are formed, and ventilation arrangement is required to be optimized according to the corresponding longitudinal structure of the high-level submarine tank. The conventional high-level submarine tank ventilation scheme cannot release bubbles in dead corners of the structure, the bubbles are continuously gathered, and finally the bubbles escape into a seawater main pipe along with water flow.
3. The position of the air bubble at the top of the submarine tank can be varied. Compared with a ship high-level submarine tank without a bubble drag reduction system, bubbles entering the ship submarine tank with bubble drag reduction are obviously increased, along with the seawater flowing in the submarine tank, the interaction between the bubbles and the seawater are more complex and changeable due to the influence of ship shaking, so that the position of the top bubble frequently moves, the conventional high-level submarine tank ventilation scheme cannot capture the bubbles rapidly, and the risk that the bubbles enter a seawater main pipe is increased.
4. Different from low-level submarine tank, the high-level submarine tank is suitable for a bubble drag reduction system, the upper and lower layered structures are not arranged in the high-level submarine tank, the inlet of the high-level submarine tank is slightly higher than the baseline height of a ship, bubbles are easier to flush into the submarine tank, meanwhile, under the severe condition of shallow sea conditions, the high-level submarine tank also has a large amount of air entering risk, the situation is not considered by the conventional high-level submarine tank ventilation pipeline, and the ventilation pipeline does not have the characteristic of rapid exhaust.
If the bubbles in the high-level submarine tank cannot be timely discharged through the ventilation pipeline, the bubbles can further enter the seawater main pipe along with water flow, so that the working states of all seawater pumps (such as a main seawater pump, a seawater pump of a water making machine, a seawater pump of a washing system and the like) are affected, the working environment of an impeller in the pump is damaged, the service life of the seawater pump is greatly shortened, and the outlet pressure of the pump cannot be stabilized; meanwhile, bubbles are transported to all system equipment through the lightering of the seawater pump, and irreversible damage can be caused to other equipment, so that serious potential safety hazards are generated.
Therefore, for the ship project adopting the bubble drag reduction system, the possibility that bubbles enter the high-level submarine tank is considered, the ventilation scheme design of the high-level submarine tank is optimized, and the bubbles in the seawater are prevented from entering the seawater main pipe to influence the whole seawater system.
Disclosure of Invention
In order to solve the problems, the invention provides a high-position submarine tank suitable for a bubble drag reduction system, which aims to achieve the purposes of rapidly removing bubbles and avoiding the bubbles from entering a seawater main pipe, and adopts the following technical scheme:
The utility model provides a high-order submarine tank suitable for bubble drag reduction system, vertically is provided with two hull structures in the high-order submarine tank, all has the interval between two hull structures, between hull structure and the sea water house steward.
The two hull structures are respectively provided with an opening, the hull structure close to the sea water main pipe is a first hull structure, the opening on the first hull structure is a first opening, and the first opening is arranged at the top of the first hull structure; the hull structure far away from the sea water main pipe is a second hull structure, the opening on the second hull structure is a second opening, and the second opening is formed in the bottom of the second hull structure.
The high-level submarine tank is divided into three tank chambers by two hull structures, two ventilation points are respectively arranged on the two sides of the bow and stern at the top of each tank chamber, and the ventilation points are a bubble capturing short pipe, a stop valve and a ventilation pipe from bottom to top in sequence, and the diameter of the bubble capturing short pipe is larger than that of the ventilation pipe.
The high-level submarine tank suitable for the bubble drag reduction system is characterized in that the caliber of the ventilation pipeline is DN100.
According to the high-level submarine tank suitable for the bubble drag reduction system, the caliber of the bubble capturing short pipe is DN 300-DN 400.
The high-level submarine tank suitable for the bubble drag reduction system is characterized in that the bubble capturing short pipe is communicated with the top of the high-level submarine tank.
The high-level submarine tank suitable for the bubble drag reduction system has the advantages that the flow area of the first opening and the second opening is larger than that of the seawater main pipe.
The high-level submarine tank suitable for the bubble drag reduction system is characterized in that a plurality of zinc blocks of sacrificial anodes are arranged in the submarine tank.
The high-level submarine tank suitable for the bubble drag reduction system is characterized in that the vent pipe below the waterline is a straight pipe which is continuously and vertically upwards.
Aiming at the risk that bubbles of the bubble drag reduction system enter the sea floor main, the risk that the bubbles generated by the bubble drag reduction system enter the sea floor main is reduced by optimizing ventilation arrangement of the high-level sea floor tank, so that the bubbles are prevented from entering the sea floor main, and for a ship adopting the bubble drag reduction system, the possibility that the bubbles are mixed into the sea floor main can be greatly reduced by adopting the scheme, and normal operation of the ship is ensured; meanwhile, for some projects that the draft is shallow, bubbles possibly generated under the condition of severe sea conditions enter a seawater system, the design scheme can be considered.
Drawings
FIG. 1 is a schematic diagram of a ventilation structure of a conventional high-level submarine tank;
FIG. 2 is a schematic diagram of the ventilation side view structure of the high-level submarine tank according to the invention;
FIG. 3 is a schematic diagram of a ventilation front view structure of the high-level submarine tank of the invention;
FIG. 4 is a schematic diagram of the ventilation top view of the high-level submarine tank according to the invention;
FIG. 5 is a schematic view of the top vent line of the present invention relative to the waterline;
wherein, 1-first hull structure, 2-second hull structure, 3-first trompil, 4-second trompil, 5-sea water house steward, 6-bubble capture nozzle stub, 7-stop valve, 8-permeability cell.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 2 and 4, a high-level submarine tank suitable for a bubble drag reduction system is vertically provided with two hull structures in the high-level submarine tank, and spaces exist between the two hull structures and between the hull structures and a sea water main pipe.
The two hull structures are respectively provided with an opening, the hull structure close to the sea water main pipe 5 is a first hull structure 1, the opening on the first hull structure is a first opening 3, and the first opening is arranged at the top of the first hull structure; the hull structure far away from the sea water main pipe is a second hull structure 2, the opening on the second hull structure is a second opening 4, and the second opening is formed in the bottom of the second hull structure. The flow area of the first opening and the second opening is larger than that of the seawater main pipe, and the seawater flow direction is shown in figure 3.
The two hull structures divide the high-level submarine tank into three tank chambers, the left end and the right end of the top of each tank chamber are respectively provided with a ventilation point, and the ventilation points are a bubble capturing short pipe 6, a stop valve 7 and a ventilation pipe 8 in sequence from bottom to top, and the diameter of the bubble capturing short pipe is larger than that of the ventilation pipe. The bubble catching short pipe is communicated with the top of the high-level submarine tank. The number of the ventilation pipelines is increased, the caliber of the ventilation pipelines is increased, and the caliber of the ventilation pipelines is DN100. Compared with the conventional ship, a large amount of bubbles can be gushed into the high-position submarine tank of the ship when the bubble drag reduction system runs, and the number of ventilation pipelines is required to be increased in order to timely discharge the bubbles in the submarine tank.
The exhaust point of the ventilation pipeline is optimized, the bubble quantity of the conventional ship is small, the structure in the submarine tank is simple, and 1 ventilation pipe is arranged at the position close to the side of the top of the submarine tank; but the top boundary of the high-level submarine tank suitable for the bubble drag reduction system is enlarged, and an upper layer, a lower layer and a transverse diversion chamber are arranged,
This can lead to a large number of bubbles collecting in narrow structural dead angles. According to the structural characteristics of transverse distribution of the internal diversion chambers of the high-level submarine tank, ventilation points are respectively arranged at the left end and the right end of the bow chamber, ventilation points are respectively arranged at the left end and the right end of the middle chamber, ventilation points are respectively arranged at the left end and the right end of the stern chamber, as shown in fig. 4, if a plurality of diversion chambers are arranged in the low-level submarine tank, corresponding ventilation points can be increased according to the quantity of the diversion chambers.
Compared with a conventional ship, more bubbles can enter a ship high-position submarine tank provided with a bubble drag reduction system, interaction between the bubbles and the seawater is more complex and changeable, so that the position of the top bubble frequently moves, the caliber of a bubble capturing short pipe is DN 300-DN 400, and therefore the bubbles can sink into the short pipe and cannot escape again when moving at the top of the high-position submarine tank, and then the bubbles are gradually discharged to the atmosphere by a rear-end vent pipe, so that timely discharge of the bubbles in the high-position submarine tank is ensured.
As shown in fig. 5, the partial vent line trend under the waterline is optimized, and the height of the high-level submarine tank is slightly higher from the baseline height of the ship and is closer to the side. Under severe sea conditions, when bubbles drag reduction operation or draft are shallower, special situations of filling a large amount of air in a short time can occur, so that the trend of a ventilation pipeline below a waterline needs to be optimized, the whole part below the waterline needs to be vertically upwards as continuously as possible, the resistance of the bubbles passing in the pipeline is reduced, a large amount of air entering in a short time can be rapidly discharged, and the hidden trouble that a seawater manifold is mixed with the bubbles due to air accumulation is avoided.
The invention effectively avoids the air bubbles entering the seawater system, provides a new design scheme of the submarine tank aiming at the risk of the air bubbles entering the submarine tank of the air bubble drag reduction system, and avoids the risk of the air bubbles generated by the air bubble drag reduction system entering the seawater main pipe by optimizing the structure and arrangement inside the submarine tank.
Claims (7)
1. The high-position submarine tank suitable for the bubble drag reduction system is characterized in that two hull structures are vertically arranged in the high-position submarine tank, and spaces are reserved between the two hull structures and between the hull structures and a seawater main pipe (5);
The two hull structures are respectively provided with an opening, the hull structure close to the sea water main pipe is a first hull structure (1), the opening on the first hull structure is a first opening (3), and the first opening is arranged at the top of the first hull structure; the hull structure far away from the sea water main pipe is a second hull structure (2), the opening on the second hull structure is a second opening (4), and the second opening is formed in the bottom of the second hull structure;
The high-level submarine tank is divided into three tank chambers by two hull structures, two sides of a bow and a stern at the top of each tank chamber are respectively provided with an air permeable point, and the air permeable points are a bubble capturing short pipe (6), a stop valve (7) and an air permeability pipe (8) in sequence from bottom to top, and the diameter of the bubble capturing short pipe is larger than that of the air permeability pipe.
2. The high-end sea chest for a bubble drag reducing system of claim 1, wherein said venting line has a caliber of DN100.
3. The high-level sea chest for a bubble drag reducing system of claim 1, wherein the bubble trap spool has a caliber of DN 300-DN 400.
4. The high-end sea chest for a bubble drag reducing system of claim 1, wherein the bubble trap spool is in communication with the top of the high-end sea chest.
5. The high-end sea chest for a bubble drag reducing system of claim 1, wherein the first and second openings have a flow area greater than the flow area of the sea chest.
6. The high-end sea chest for a bubble drag reducing system of claim 1, wherein a plurality of zinc blocks of sacrificial anodes are disposed within the sea chest.
7. The high-level sea chest for a bubble drag reducing system of claim 1, wherein the vent tube below the waterline is a continuous vertically upward straight tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311452913.2A CN117901991A (en) | 2023-11-03 | 2023-11-03 | High-order submarine tank suitable for bubble drag reduction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311452913.2A CN117901991A (en) | 2023-11-03 | 2023-11-03 | High-order submarine tank suitable for bubble drag reduction system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117901991A true CN117901991A (en) | 2024-04-19 |
Family
ID=90682683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311452913.2A Pending CN117901991A (en) | 2023-11-03 | 2023-11-03 | High-order submarine tank suitable for bubble drag reduction system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117901991A (en) |
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2023
- 2023-11-03 CN CN202311452913.2A patent/CN117901991A/en active Pending
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