CN104340331A - Device for reducing navigation resistance on ship with moon pool - Google Patents
Device for reducing navigation resistance on ship with moon pool Download PDFInfo
- Publication number
- CN104340331A CN104340331A CN201310330658.4A CN201310330658A CN104340331A CN 104340331 A CN104340331 A CN 104340331A CN 201310330658 A CN201310330658 A CN 201310330658A CN 104340331 A CN104340331 A CN 104340331A
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- CN
- China
- Prior art keywords
- deflecting plate
- moon pool
- ship
- aerofoil components
- flow guide
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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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- 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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- Earth Drilling (AREA)
Abstract
The invention provides a device for reducing navigation resistance on a ship with a moon pool. The ship with the moon pool comprises a hull and the moon pool. The moon pool penetrates the hull. The device comprises a first flow guide plate and a second flow guide plate. The first flow guide plate and the second flow guide plate are fittingly arranged at a bottom opening of the moon pool and are respectively hinged to the bottom opening of the moon pool, a plurality of wing-shaped components are arranged on the first flow guide plate and the second flow guide plate along the length direction of the ship at intervals and are penetratingly arranged on the first flow guide plate and the second flow guide plate, front edges and rear edges are arranged on the wing-shaped components, each front edge of the corresponding wing-shaped component has an arc-shaped section, the section of each rear edge of the corresponding wing-shaped component is in the shape of an acute angle, each front edge and the corresponding rear edge are respectively arranged at two ends of the corresponding wing-shaped component, and the front edges face the direction of a stem of the ship. According to the technical scheme, the device has the advantages that obvious flow guide effects can be realized, vortex due to sudden change of the geometric shape of the opening of the moon pool can be reduced, and separation of water flow at the bottom of the moon pool and sloshing of water in the moon pool can be suppressed; the water in the moon pool is basically static during navigation, and accordingly the purpose of reducing the navigation resistance can be achieved.
Description
Technical field
The invention belongs to ocean engineering ship technical field, relate to a kind of device reducing band moon pool ship resistance, be particularly useful for the drilling ship being with moonpool openings.
Background technology
Drilling ship, apart from outside the conventional equipment needed for boats and ships, also has the relevant drill outfits such as derrick, and transfers the moonpool openings of wellhead equipment.Drilling ship possesses from boat ability, and more than general 10 joints of the speed of a ship or plane, mobility strong compared with semi-submersible drilling unit, waterplane area is large, and variable load is large, is more suitable for deepwater drilling operation.When drilling ship navigation, the existence of moon pool additionally can increase running resistance.According to domestic and international correlative study, moonpool openings increases bringing the running resistance of 30% ~ 50%.Higher at the speed of a ship or plane, even reach 100% when absorbing water more shallow.According to theoretical investigation and test observation, moon pool resistance can be roughly divided into following components:
Moon pool form resistance: moonpool openings place geometric configuration is suddenlyd change, and flow field can produce whirlpool herein and externally carry, reduces fluid field pressure, thus produces resistance.
Moon pool pressure drag: during ship's navigation, the whirlpool that moon pool front end produces is carried to stern, is hindered, is returned to moon pool inside, cause moon pool inner fluid to roll when encountering moon pool rear wall, and moon pool rear wall is comparatively large compared with the pressure of antetheca, thus produces resistance.
Moon pool friction drag: the friction drag of moon pool wall generation.
Moon pool rocks resistance: because whirlpool is constantly returned to moon pool inside by moon pool rear wall, can produce intrinsic sloshing motion in moon pool, and water body periodically to front and rear wall generation effect, thus produces resistance.
Moon pool significantly increases drilling ship running resistance as can be seen here, increases fuel oil consumption, reduces economy.
Therefore, those skilled in the art is devoted to develop a kind of device reducing band moon pool ship resistance.
Summary of the invention
In view of above-mentioned the problems of the prior art, the present invention is by arranging openable first deflecting plate and the second deflecting plate at moon pool bottom opening part, reducing the resistance of moon pool bottom opening to navigation when navigating by water by the first deflecting plate and the second deflecting plate, being beneficial to ship's navigation.Technical scheme is as follows:
The device reducing band moon pool ship resistance provided by the invention, described band moon pool boats and ships comprise hull and the moon pool through described hull, described device comprises the first deflecting plate and the second deflecting plate, described first deflecting plate and the second deflecting plate coordinate the bottom opening place being located at described moon pool, described first deflecting plate and the second deflecting plate are hinged with described moon pool bottom opening part respectively, captain direction along described boats and ships on described first deflecting plate and the second deflecting plate is interval with some aerofoil components, described aerofoil components runs through to be located on described first deflecting plate and the second deflecting plate, described aerofoil components is provided with cross section and is respectively the leading edge of arc and the trailing edge of acute angle, described leading edge and trailing edge are located at the two ends of described aerofoil components respectively, described leading edge is towards the ship's head of described boats and ships.
Preferably, also comprise actuating unit, the first deflecting plate and the second deflecting plate described in described actuating unit rotary actuation.
Preferably, the width of described first deflecting plate and described second deflecting plate equals the width of described boats and ships.
Preferably, described first deflecting plate and the second deflecting plate are provided with some through holes, and described aerofoil components is located in described through hole.
Preferably, the radius of the arc section of the leading edge of described aerofoil components is 50 ~ 100mm, and the angle in the acute angle cross section of the trailing edge of described aerofoil components is 10 ~ 20 °.
Preferably, the inwall of described moon pool is provided with the first junction, the opposed inner walls of described moon pool is respectively equipped with the first junction, one end of described first deflecting plate and the second deflecting plate is hinged with one side of described moon pool bottom opening respectively, the other end of the first deflecting plate and the second deflecting plate is respectively equipped with second junction of matching with described first junction.
Preferably, the length of the aerofoil components on described first deflecting plate and the second deflecting plate is 5% ~ 15% of the length of described moon pool bottom opening.
Preferably, the spacing of the aerofoil components on described first deflecting plate and the second deflecting plate is 30% ~ 80% of aerofoil components length.
Preferably, the some aerofoil components on described first deflecting plate and the second deflecting plate are 500 ~ 1000mm apart from the minimum length of one end of described first deflecting plate and the second deflecting plate.
Preferably, the material of described aerofoil components is high strength steel.
The water conservancy diversion successful of technical solution of the present invention, can reduce the whirlpool produced because of the sudden change of moonpool openings geometric configuration, suppress water body in the separation of moon pool bottom current and moon pool to rock.In navigation, in moon pool, water body is in static substantially, thus reaches the object reducing running resistance.In drilling ship towing tank resistance test, adopt the drilling ship after technical scheme of the present invention to reduce at 8 ~ 12 joint speed of a ship or plane scope internal resistances and reach about 30%, substantially close to drilling ship without running resistance during moonpool openings.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of embodiments of the invention;
Fig. 2 is the deflector structure schematic diagram of embodiments of the invention;
Fig. 3 is the aerofoil components structural representation of embodiments of the invention;
Fig. 4 is the comparison of test results figure of embodiments of the invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
Below with reference to accompanying drawing, concrete explaination is done to embodiments of the invention.
A kind of device reducing band moon pool ship resistance of embodiments of the invention as shown in Figure 1, band moon pool boats and ships comprise hull 1 and the moon pool 2 through hull 1.Moon pool 2 comprises inwall 3A and 3B.Moon pool 2 is the through holes vertically running through hull 1, is the passage below deck in ship structure and the water surface, is convenient to transfer implement.The horizontal section of moon pool 2 is rectangular, and the yardstick of horizontal section, differing heights place may be different.
Wherein, the first deflecting plate 4A, the second deflecting plate 4B and actuating unit is also comprised.One end of first deflecting plate 4A and one side of moon pool 2 bottom end opening hinged, one end of the second deflecting plate 4B and the another side of moon pool 2 bottom end opening hinged.First deflecting plate 4A and the second deflecting plate 4B is basic and moon pool 2 bottom opening is wide.Actuating unit is connected with the second deflecting plate 4B with the first deflecting plate 4A, and rotary actuation first deflecting plate 4A and the second deflecting plate 4B.
When boats and ships are in operating condition, the first deflecting plate 4A and the second deflecting plate 4B is by actuating unit, and be preferably hydraulic gear and drive, inwall 3A, 3B of being posted by moon pool 2 respectively shelve, and do not affect boats and ships normal operation.
As shown in figs. 1 and 2, in an embodiment of the present invention, the first deflecting plate 4A and the second deflecting plate 4B comprises several closed aerofoil components 6 running through setting, and preferably its material is high strength steel.Each aerofoil components 6 distributes mutually across a certain distance along captain direction, and aerofoil components 6 leading edge is towards ship's head, and each aerofoil components 6 is connected on the longitudinal 10 of the first deflecting plate 4A and the second deflecting plate 4B.
And combine as shown in Figure 3, in an embodiment of the present invention, aerofoil components 6 is enclosed construction, and in its cross section structure, upper surface 7 is straight line.Lower surface is made up of the front portion 9 of rectilinear rear portion 8 and arc line shaped, and the radius of upper surface 7 and anterior 9 curved leading edges formed is 50 ~ 100mm, and the angle of the trailing edge of the acute angle that upper surface 7 and rear portion 8 are formed is 10 ~ 20 degree.
Separately as shown in fig. 1, in an embodiment of the present invention, the length n of each aerofoil components 6 is 5% ~ 15% of moon pool 2 bottom end opening longitudinal length L; The spacing d of adjacent aerofoil parts 6 is 30% ~ 80% of its length n; The length of the most front/rear end apart from moon pool 2 bottom end opening end wall being positioned at moon pool 2 bottom end opening of aerofoil components 6, namely respectively apart from the distance m=500 ~ 1000mm of one end of the first deflecting plate 4A and the second deflecting plate 4B.
The water conservancy diversion successful of technical solution of the present invention, can reduce the whirlpool produced because of the sudden change of moonpool openings geometric configuration, suppress water body in the separation of moon pool bottom current and moon pool to rock.In navigation, in moon pool, water body is in static substantially, thus reaches the object reducing running resistance.As shown in Figure 4, wherein abscissa is the speed of a ship or plane (Kn), ordinate is effective power (KW), in drilling ship towing tank resistance test, adopt the drilling ship after technical scheme of the present invention to reduce at 8 ~ 12 joint speed of a ship or plane scope internal resistances and reach about 30%, substantially close to drilling ship without running resistance during moonpool openings.
Be described in detail specific embodiments of the invention above, but it is just as example, the present invention is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that the present invention is carried out and substituting also all among category of the present invention.Therefore, equalization conversion done without departing from the spirit and scope of the invention and amendment, all should contain within the scope of the invention.
Claims (10)
1. one kind is reduced the device of band moon pool ship resistance, described band moon pool boats and ships comprise hull and the moon pool through described hull, it is characterized in that, described device comprises the first deflecting plate and the second deflecting plate, described first deflecting plate and the second deflecting plate coordinate the bottom opening place being located at described moon pool, described first deflecting plate and the second deflecting plate are hinged with described moon pool bottom opening part respectively, captain direction along described boats and ships on described first deflecting plate and the second deflecting plate is interval with some aerofoil components, described aerofoil components runs through to be located on described first deflecting plate and the second deflecting plate, described aerofoil components is provided with cross section and is respectively the leading edge of arc and the trailing edge of acute angle, described leading edge and trailing edge are located at the two ends of described aerofoil components respectively, described leading edge is towards the ship's head of described boats and ships.
2. the device reducing band moon pool ship resistance as claimed in claim 1, is characterized in that, also comprise actuating unit, the first deflecting plate and the second deflecting plate described in described actuating unit rotary actuation.
3. the device reducing band moon pool ship resistance as claimed in claim 2, it is characterized in that, the width of described first deflecting plate and described second deflecting plate equals the width of described boats and ships.
4. the device reducing band moon pool ship resistance as claimed in claim 3, it is characterized in that, described first deflecting plate and the second deflecting plate are provided with some through holes, and described aerofoil components is located in described through hole.
5. the device reducing band moon pool ship resistance as claimed in claim 4, it is characterized in that, the radius of the arc section of the leading edge of described aerofoil components is 50 ~ 100mm, and the angle in the acute angle cross section of the trailing edge of described aerofoil components is 10 ~ 20 °.
6. the device reducing band moon pool ship resistance as claimed in claim 5, it is characterized in that, the opposed inner walls of described moon pool is respectively equipped with the first junction, one end of described first deflecting plate and the second deflecting plate is hinged with one side of described moon pool bottom opening respectively, the other end of the first deflecting plate and the second deflecting plate is respectively equipped with second junction of matching with described first junction.
7. the as claimed in claim 6 device reducing band moon pool ship resistance, is characterized in that, the length of the aerofoil components on described first deflecting plate and the second deflecting plate is 5% ~ 15% of the length of described moon pool bottom opening.
8. the as claimed in claim 7 device reducing band moon pool ship resistance, is characterized in that, the spacing of the aerofoil components on described first deflecting plate and the second deflecting plate is 30% ~ 80% of aerofoil components length.
9. the device reducing band moon pool ship resistance as claimed in claim 8, it is characterized in that, the some aerofoil components on described first deflecting plate and the second deflecting plate are 500 ~ 1000mm apart from the minimum length of one end of described first deflecting plate and the second deflecting plate.
10. the device reducing band moon pool ship resistance as claimed in claim 9, it is characterized in that, the material of described aerofoil components is high strength steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310330658.4A CN104340331A (en) | 2013-07-31 | 2013-07-31 | Device for reducing navigation resistance on ship with moon pool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310330658.4A CN104340331A (en) | 2013-07-31 | 2013-07-31 | Device for reducing navigation resistance on ship with moon pool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104340331A true CN104340331A (en) | 2015-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310330658.4A Pending CN104340331A (en) | 2013-07-31 | 2013-07-31 | Device for reducing navigation resistance on ship with moon pool |
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| CN (1) | CN104340331A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104724248A (en) * | 2015-03-06 | 2015-06-24 | 上海船舶研究设计院 | Damping plate structure reducing surging of fluid in cavity of moon pool |
| CN105564587A (en) * | 2016-01-07 | 2016-05-11 | 江苏科技大学 | Device for reducing fluid oscillation in moon pool in sailing of drilling ship |
| CN105730608A (en) * | 2016-03-18 | 2016-07-06 | 江苏科技大学 | Adjustable device for reducing oscillation of liquid in moon pool |
| CN108749998A (en) * | 2018-05-23 | 2018-11-06 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | Diving moon pool and ship |
| CN109795635A (en) * | 2019-02-27 | 2019-05-24 | 招商局重工（江苏）有限公司 | A kind of drag reduction partition and its design method |
| CN110949606A (en) * | 2019-12-31 | 2020-04-03 | 哈尔滨工程大学 | Combined type ship bubble restraining and evacuating device provided with extensible moon pool |
| CN111891291A (en) * | 2020-08-21 | 2020-11-06 | 上海交通大学 | Moon pool damping device |
| CN113086084A (en) * | 2021-04-22 | 2021-07-09 | 天津大学 | Damping reduction device for reducing additional damping of moon pool at different ship speeds |
Citations (7)
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| JP2001158394A (en) * | 1999-12-02 | 2001-06-12 | Mitsubishi Heavy Ind Ltd | Propulsion resistance reducing device of ship with moon pool |
| CN101331054A (en) * | 2006-05-11 | 2008-12-24 | 三星重工业株式会社 | Anti-sloshing device in moon pool |
| KR20090034068A (en) * | 2007-10-02 | 2009-04-07 | 삼성중공업 주식회사 | Drag reduction appendage for drillship moonpool |
| CN102438885A (en) * | 2010-02-12 | 2012-05-02 | 大宇造船海洋株式会社 | Resistance-reducing device for a moon pool |
| KR20130035504A (en) * | 2011-09-30 | 2013-04-09 | 삼성중공업 주식회사 | Ship with disruptor for fluid into moonpool |
| KR20130053028A (en) * | 2011-11-14 | 2013-05-23 | 현대중공업 주식회사 | Apparatus for opening and closing moon-pool of drill ship |
| KR101275997B1 (en) * | 2008-12-17 | 2013-06-19 | 현대중공업 주식회사 | Open-type door for the drillship`s moon pool |
-
2013
- 2013-07-31 CN CN201310330658.4A patent/CN104340331A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001158394A (en) * | 1999-12-02 | 2001-06-12 | Mitsubishi Heavy Ind Ltd | Propulsion resistance reducing device of ship with moon pool |
| CN101331054A (en) * | 2006-05-11 | 2008-12-24 | 三星重工业株式会社 | Anti-sloshing device in moon pool |
| KR20090034068A (en) * | 2007-10-02 | 2009-04-07 | 삼성중공업 주식회사 | Drag reduction appendage for drillship moonpool |
| KR101275997B1 (en) * | 2008-12-17 | 2013-06-19 | 현대중공업 주식회사 | Open-type door for the drillship`s moon pool |
| CN102438885A (en) * | 2010-02-12 | 2012-05-02 | 大宇造船海洋株式会社 | Resistance-reducing device for a moon pool |
| KR20130035504A (en) * | 2011-09-30 | 2013-04-09 | 삼성중공업 주식회사 | Ship with disruptor for fluid into moonpool |
| KR20130053028A (en) * | 2011-11-14 | 2013-05-23 | 현대중공업 주식회사 | Apparatus for opening and closing moon-pool of drill ship |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104724248A (en) * | 2015-03-06 | 2015-06-24 | 上海船舶研究设计院 | Damping plate structure reducing surging of fluid in cavity of moon pool |
| CN104724248B (en) * | 2015-03-06 | 2017-05-24 | 上海船舶研究设计院 | Damping plate structure reducing surging of fluid in cavity of moon pool |
| CN105564587A (en) * | 2016-01-07 | 2016-05-11 | 江苏科技大学 | Device for reducing fluid oscillation in moon pool in sailing of drilling ship |
| CN105730608A (en) * | 2016-03-18 | 2016-07-06 | 江苏科技大学 | Adjustable device for reducing oscillation of liquid in moon pool |
| CN108749998A (en) * | 2018-05-23 | 2018-11-06 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | Diving moon pool and ship |
| CN108749998B (en) * | 2018-05-23 | 2020-07-31 | 上海船舶研究设计院（中国船舶工业集团公司第六0四研究院） | Diving moon pool and ship |
| CN109795635A (en) * | 2019-02-27 | 2019-05-24 | 招商局重工（江苏）有限公司 | A kind of drag reduction partition and its design method |
| CN110949606A (en) * | 2019-12-31 | 2020-04-03 | 哈尔滨工程大学 | Combined type ship bubble restraining and evacuating device provided with extensible moon pool |
| CN111891291A (en) * | 2020-08-21 | 2020-11-06 | 上海交通大学 | Moon pool damping device |
| CN113086084A (en) * | 2021-04-22 | 2021-07-09 | 天津大学 | Damping reduction device for reducing additional damping of moon pool at different ship speeds |
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Application publication date: 20150211 |