CN102951255A - Method for reducing rudder resistance of ships - Google Patents
Method for reducing rudder resistance of ships Download PDFInfo
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- CN102951255A CN102951255A CN2011102358493A CN201110235849A CN102951255A CN 102951255 A CN102951255 A CN 102951255A CN 2011102358493 A CN2011102358493 A CN 2011102358493A CN 201110235849 A CN201110235849 A CN 201110235849A CN 102951255 A CN102951255 A CN 102951255A
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- rudder
- gas
- air
- vessel orientation
- resistance
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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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Abstract
The invention relates to a method for reducing rudder resistance of ships, in particular to a method for reducing underwater resistance of a rudder by means of leading in air bubbles in negative pressure. The method includes providing a ship with a screw propeller required for advancing of a hull and a rudder at the back of the screw propeller at preset positions; arranging an air bubble releaser at the front edge of the rudder; providing an air leading-in device which comprises at least one air guide pipe; utilizing high-speed water flow generated from the screw propeller during advancing of the hull to impact an upstream face of the rudder, and forming negative pressure at an air bubble releasing outlet according to the Bernoulli's principle to suck air; leading air into the air inlet through the air guide pipes, and releasing the air from the air bubble releasing outlet to mix with the water flow so as to form a great quantity of air bubbles. An air inlet is arranged at the upper end of each air guide pipe, and a lower section is connected to the air inlet of the air bubble releaser. By the method, high-speed water flow resistance generated from the rudder to the screw impeller can be reduced, and accordingly energy is saved.
Description
Technical field
The present invention relates to the method for a kind of reduction vessel orientation rudder (Rudder) resistance, espespecially a kind of gas bubbles of utilizing negative pressure to import makes the vessel orientation rudder reduce the method for resistance.
Background technology
Ship is except hull, attached suspension member or the hanger that hangs over the hull outside still arranged, for example: ship 10 shown in Figure 1, it comprises a hull 11, reaching one is hubbed at hull 11 and is positioned at the screw propeller 13 of floating line below 12, and the suspension member that ship shown in this figure 10 is positioned at these screw propeller 13 rears is a vessel orientation rudder 14, be used for controlling party to.
Shown in Figure 2, the flow through schematic diagram of vessel orientation rudder 14 of the current that the screw propeller 13 of above-mentioned ship 10 produces, because vessel orientation rudder 14 is in screw propeller 13 high-velocity flow downstreams, can increase the resistance of navigating, but but this vessel orientation rudder 14 indispensable suspension member that is this type ships 10.Be with, the resistance that vessel orientation rudder 14 produces in screw propeller 13 high-velocity flows is unavoidable.
But, in the prior art, address the above problem a little, mostly be not affect under the principle of structural strength at this rudder for ship, only can in shape design flow line style or the processing of work surface, reduce the resistance of vessel orientation rudder.So, in fact these methods can reduce the effect of resistance, are not to still have to be hoistedly, incur a considerable or great expense exactly; Be with, how can reduce with low cost the resistance of vessel orientation rudder, and then reduce the consumption of fuel oil, be the ship originating firm, and even the problem of institute of academic research unit wish solution.
Summary of the invention
Technical problem underlying to be solved by this invention is, overcome the defects that prior art exists, and provide a kind of method that reduces the vessel orientation resistance of rudder, it must not change any former design, only must the gas bubbles releasing device be set in former vessel orientation rudder leading edge, the upstream face of the high speed water jet impact vessel orientation rudder that utilizes hull to advance to produce, form according to this negative pressure and import gas bubbles, utilize the gas bubbles that imports, come part to isolate contacting of current and vessel orientation rudder, can reduce the resistance of the high-velocity flow that the vessel orientation rudder produces screw propeller, reach energy-conservation effect.
The technical solution adopted for the present invention to solve the technical problems is:
The method of a kind of reduction vessel orientation rudder (Rudder) resistance, espespecially a kind of negative pressure of utilizing imports the method that gas bubbles reduces vessel orientation rudder resistance in water, it is characterized in that, and it comprises:
A) provide a ship, its desired location is provided with the hull necessary screw propeller of advancing, and is located at the vessel orientation rudder of this rear propeller;
B) leading edge at aforementioned vessel orientation rudder is provided with the gas bubbles releasing device, and it utilizes a hollow component to consist of the upstream face that is arranged on this vessel orientation rudder, which is provided with at least one gas introduction port, and both sides are provided with several gas bubbles and disengage mouth;
C) provide a gas leading-in device, it comprises at least one air guide body, and this air guide body upper end has an admission port, and hypomere section is connected to the gas introduction port of this gas bubbles releasing device;
When d) utilizing this hull to advance, the high-velocity flow that screw propeller produces (F) impacts the upstream face of this vessel orientation rudder, utilizes bernoulli principle (Bernoulli ' s Principle) to disengage the interruption-forming negative pressure in this gas bubbles, sucks gas;
E) aforementioned gas flows into this gas introduction port via this air guide body, and disengages mouth via this gas bubbles and disengage with after current mix, and forms numerous gas bubbles;
F) utilize aforementioned gas bubbles of disengaging to come contact friction between isolated part current and this vessel orientation rudder, so as to reducing the resistance of the high-velocity flow that the vessel orientation rudder produces screw propeller.
The method of described reduction vessel orientation rudder (Rudder) resistance, wherein, the admission port of this air guide body upper end is located in the described hull or is higher than on the floating line.
The method of described reduction vessel orientation rudder (Rudder) resistance, wherein, this gas leading-in device further utilizes supplementary mode to import gas, comprises exhaust gas utilization, with low-pressure gases such as engine exhaust or steam turbine tail gas, sends in this air guide body.
The method of described reduction vessel orientation rudder (Rudder) resistance, more be provided with a pressure device, its Air compressor by described hull, blowing engine, engine, steam turbine or turbocharger wherein arbitrary institute consist of, and with pressuring method gas are sent in this air guide body.
The invention has the beneficial effects as follows, it must not change any former design, only must the gas bubbles releasing device be set in former vessel orientation rudder leading edge, the upstream face of the high speed water jet impact vessel orientation rudder that utilizes hull to advance to produce, form according to this negative pressure and import gas bubbles, the gas bubbles that utilize to import comes part to isolate contacting of current and vessel orientation rudder, can reduce the resistance of the high-velocity flow that the vessel orientation rudder produces screw propeller, reach energy-conservation effect.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is existing vessel yaw rudder schematic diagram.
Fig. 2 is the flow through schematic diagrams of vessel orientation rudder of existing current.
Fig. 3 is that gas bubbles of the present invention produces schematic diagram.
Fig. 4 is gas leading-in device schematic diagram of the present invention.
Fig. 5 is 5-5 post-show cross-section map shown in Figure 4.
Fig. 6 is the main structure enlarged diagram of 6 position indications shown in Figure 5, in order to the schematic diagram that shows that this gas bubbles produces in negative pressure.
Fig. 7 is the part schematic perspective view of gas bubbles releasing device shown in Figure 6.
The number in the figure explanation:
10 ships
11 hulls
12 floating lines
13 screw propellers
131 power engines
14 vessel orientation rudders
20 gas bubbles releasing devices
21 hollow components
211 gas introduction ports
212 gas bubbles are disengaged mouth
30 gas leading-in devices
31 air guide bodys
32 admission ports
33 control cock
34 pressure devices
50 gas bubbles
The F high-velocity flow
The specific embodiment
Below provide preferred embodiment for the above-mentioned technical characterictic of the present invention.Therefore but vessel orientation rudder pattern is various, and shape and construct neither identically, only be illustrated with preferred embodiment, but its technological means of using is then identical, holds and does not give unnecessary details one by one.
At first, see also Fig. 3～shown in Figure 6, wherein shown in Figure 3 is to disclose the schematic diagram that gas bubbles 50 of the present invention reduces the rudder for ship resistances, in order to make comparisons with existing vessel orientation rudder 14 skin resistances of Fig. 2; Fig. 4, the present invention that Fig. 5 then discloses one better possible embodiments, implementation step and concrete structure comprise:
A) provide a ship 10, the hull 11 of this ship 10 has a screw propeller 13 in the present embodiment, is driven by a power engine 131, make this screw propeller 13 send high-velocity flow F, and a vessel orientation rudder 14 is located at after this screw propeller 13.
B) leading edge at aforementioned vessel orientation rudder 14 is provided with gas bubbles releasing device 20, such as Fig. 6, shown in Figure 7, in the present embodiment, this gas bubbles releasing device 20 utilizes a hollow component 21 to consist of, be arranged on the upstream face of this vessel orientation rudder 14, this hollow component 21 is provided with at least one gas introduction port 211, and both sides are provided with several gas bubbles and disengage mouth 212, this gas bubbles is disengaged mouth 212 and be can be circular hole or other body, in the present embodiment, this hollow component 21 is the upstream face that a pipe is located at these vessel orientation rudder 14 leading edges, but is not limited to this.Be hollow component 21 of the present invention, can be other body, and be drilled with most gas bubbles at various body and disengage mouthfuls 212, and this gas bubbles is disengaged mouthfuls 212 and be can be circular hole or other shape.This kind variation in shape, but be all the present invention's practical range.Moreover this hollow component 21 can be when ship dispatches from the factory, and is namely one-body molded with this vessel orientation rudder 14, and is provided with gas bubbles and disengages mouthfuls 212; Also ship under arms is to carry additionally that mode arranges and the upstream face that is fixed on this vessel orientation rudder 14 can not be corrupted to the structure of vessel orientation rudder 14, and arrange very convenient yet.
C) provide a gas leading-in device 30, as shown in Figure 4, it comprises at least one air guide body 31, and these air guide body 31 upper ends have an admission port 32, and hypomere section is connected to the gas introduction port 211 of this gas bubbles releasing device 20.And the admission port 32 of these air guide body 31 upper ends can be located in the hull 11 or be higher than on the floating line 12.
When d) utilizing this hull 11 to advance, the high-velocity flow F that screw propeller 13 produces impacts the upstream face of this vessel orientation rudder 14, utilize bernoulli principle (Bernoulli ' s Principle) to disengage mouthfuls 212 in this gas bubbles and form negative pressure, suck gas; Because when screw propeller 13 rotates, the speed of the axial current that it produces is exceedingly fast, therefore can disengage mouthful very large negative pressure of 212 generations in this gas bubbles and suck gas, and the introduction method of this gas is fully without power, as long as screw propeller 13 rotates, gas can be imported, form countless gas bubbles 50 and save very much the energy.
E) aforementioned gas flows into these gas introduction ports 211 via this air guide body 31, and disengages mouthfuls 212 via this gas bubbles and disengage with after current mix, and forms numerous gas bubbles 50.
F) as shown in Figure 3, utilize the aforementioned gas bubbles of disengaging 50 to come the contact friction of isolated part current F and this vessel orientation rudder 14, so as to reducing the resistance of the high-velocity flow that 14 pairs of screw propellers 13 of vessel orientation rudder produce.
Profess it, therefore about 700～800 times of the resistance ratios air of water utilizes gas bubbles 50 partly to isolate contacting of current and vessel orientation rudder 14, and resistance must reduce, the gas bubbles 50 that vessel orientation rudder 14 contacts with current is isolated the more, and the effect that reduces resistance is better.
Via above-mentioned technological means, so that the present invention imports gas bubbles 50, only must gas bubbles releasing device 20 be set get final product in the high-velocity flow district of vessel orientation rudder 14 leading edges, need not any power and the original design of change.
As shown in Figure 4, although the present invention need assist and squeeze into gas, then can utilize hull 11 interior original resources, for example: the air guide body 31 of this gas leading-in device 30 further connects a pressure device 34, and 34 of this air guide body 31 and this pressure devices are provided with a control cock 33, this pressure device 34 is with gases such as the air of this hull 11, engine exhaust or steam turbine tail gas, sends in this air guide body 31 with the pressurization supplementary mode.
And, this pressure device 34 can be by these hull 11 interior original Air compressors, blowing engine, engine or steam turbine are wherein arbitrary to be consisted of, it can utilize the low-pressure gases such as above-mentioned engine exhaust, steam turbine tail gas directly to import on using, therefore belong to the resource recycling, can not increase resource and increase cost.In addition, also can utilize above-mentioned engine exhaust, steam turbine tail gas etc. to drive turbocharger, make gas-pressurized, disengage mouth 212 from gas bubbles and disengage.In addition, the pressure device 34 that utilizes blowing engine etc. to consist of, also can come with a small amount of power supplied with pressurized gas, utilize a large amount of gas bubbles 50 to isolate contacting of high-velocity flow F and vessel orientation rudder 14, can obtain higher minimizing resistance effect, have the power effect that can both can obtain with a small amount of power several times, and above assisting directly imports gas or import gas with pressuring method, being all 34 of this pressure devices can implement, and holds and does not give unnecessary details.
The present invention uses a gas bubbles releasing device 20 to be installed in vessel orientation rudder 14 leading edges, the ingenious bernoulli principle that utilizes: " high-velocity fluid makes and produces negative pressure on every side ", utilize this technological means to import gas, and then discharge gas bubbles 50 and partly isolate contacting of current and vessel orientation rudder 14, can be with the most energy-conservation and actv. means, the effect that reaches the resistance that reduces the high-velocity flow F that 14 pairs of screw propellers 13 of vessel orientation rudder produce is promoted.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment does.
In sum, the present invention is on structure design, use practicality and cost benefit, meet industry development fully required, and the structure that discloses also is to have unprecedented innovative structure, have novelty, creativeness, practicality, the regulation that meets relevant patent of invention important document is therefore mention application in accordance with the law.
Claims (4)
1. method that reduces the vessel orientation resistance of rudder, espespecially a kind of negative pressure of utilizing imports the method that gas bubbles reduces vessel orientation rudder resistance in water, it is characterized in that, and it comprises:
A) provide a ship, its desired location is provided with the hull necessary screw propeller of advancing, and is located at the vessel orientation rudder of this rear propeller;
B) leading edge at aforementioned vessel orientation rudder is provided with the gas bubbles releasing device, and it utilizes a hollow component to consist of the upstream face that is arranged on this vessel orientation rudder, which is provided with at least one gas introduction port, and both sides are provided with several gas bubbles and disengage mouth;
C) provide a gas leading-in device, it comprises at least one air guide body, and this air guide body upper end has an admission port, and hypomere section is connected to the gas introduction port of this gas bubbles releasing device;
When d) utilizing this hull to advance, the high-velocity flow that screw propeller produces (F) impacts the upstream face of this vessel orientation rudder, utilizes bernoulli principle to disengage the interruption-forming negative pressure in this gas bubbles, sucks gas;
E) aforementioned gas flows into this gas introduction port via this air guide body, and disengages mouth via this gas bubbles and disengage with after current mix, and forms numerous gas bubbles;
F) utilize aforementioned gas bubbles of disengaging to come contact friction between isolated part current and this vessel orientation rudder, so as to reducing the resistance of the high-velocity flow that the vessel orientation rudder produces screw propeller.
2. the method for reduction vessel orientation resistance of rudder according to claim 1 is characterized in that, the admission port of described air guide body upper end is located in the described hull or is higher than on the floating line.
3. the method for reduction vessel orientation resistance of rudder according to claim 2, it is characterized in that, described gas leading-in device further utilizes supplementary mode to import gas, comprises exhaust gas utilization, with low-pressure gases such as engine exhaust or steam turbine tail gas, send in this air guide body.
4. the method for reduction vessel orientation resistance of rudder according to claim 3, it is characterized in that, more be provided with a pressure device, its Air compressor by described hull, blowing engine, engine, steam turbine or turbocharger wherein arbitrary institute consist of, and with pressuring method gas are sent in this air guide body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110235849.3A CN102951255B (en) | 2011-08-17 | 2011-08-17 | The method for reducing vessel orientation resistance of rudder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110235849.3A CN102951255B (en) | 2011-08-17 | 2011-08-17 | The method for reducing vessel orientation resistance of rudder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102951255A true CN102951255A (en) | 2013-03-06 |
| CN102951255B CN102951255B (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110235849.3A Expired - Fee Related CN102951255B (en) | 2011-08-17 | 2011-08-17 | The method for reducing vessel orientation resistance of rudder |
Country Status (1)
| Country | Link |
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| CN (1) | CN102951255B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366024A (en) * | 2015-12-10 | 2016-03-02 | 重庆交通大学 | Resistance reducing and energy saving type rudder blade |
| CN110053752A (en) * | 2019-05-13 | 2019-07-26 | 哈尔滨工程大学 | A kind of rudder face cavitation effect inhibition device |
| CN112109844A (en) * | 2020-09-18 | 2020-12-22 | 哈尔滨工程大学 | Automatic air suction strut structure applied to small waterplane area catamaran |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3680511A (en) * | 1969-09-25 | 1972-08-01 | Nat Res Dev | Hydrofoils for ships and like vessels |
| US3875885A (en) * | 1972-09-12 | 1975-04-08 | France Etat | Gas injection propulsion system for marine vehicles |
| CN1208384A (en) * | 1995-12-04 | 1999-02-17 | 加藤洋治 | Method of reducing friction resistance of hull, ship whose friction resistance is reduced by the method, and method of analyzing jetted bubbles on ship |
| CN201761626U (en) * | 2010-06-29 | 2011-03-16 | 中国船舶重工集团公司第七〇二研究所 | Air supply system of air cavity drag-reduction ship |
-
2011
- 2011-08-17 CN CN201110235849.3A patent/CN102951255B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3680511A (en) * | 1969-09-25 | 1972-08-01 | Nat Res Dev | Hydrofoils for ships and like vessels |
| US3875885A (en) * | 1972-09-12 | 1975-04-08 | France Etat | Gas injection propulsion system for marine vehicles |
| CN1208384A (en) * | 1995-12-04 | 1999-02-17 | 加藤洋治 | Method of reducing friction resistance of hull, ship whose friction resistance is reduced by the method, and method of analyzing jetted bubbles on ship |
| CN201761626U (en) * | 2010-06-29 | 2011-03-16 | 中国船舶重工集团公司第七〇二研究所 | Air supply system of air cavity drag-reduction ship |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366024A (en) * | 2015-12-10 | 2016-03-02 | 重庆交通大学 | Resistance reducing and energy saving type rudder blade |
| CN110053752A (en) * | 2019-05-13 | 2019-07-26 | 哈尔滨工程大学 | A kind of rudder face cavitation effect inhibition device |
| CN112109844A (en) * | 2020-09-18 | 2020-12-22 | 哈尔滨工程大学 | Automatic air suction strut structure applied to small waterplane area catamaran |
| CN112109844B (en) * | 2020-09-18 | 2021-09-10 | 哈尔滨工程大学 | Automatic air suction strut structure applied to small waterplane area catamaran |
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| CN102951255B (en) | 2017-05-31 |
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Granted publication date: 20170531 |