CN106697179A - Knuckle line type internal-rotating finny tail ship form - Google Patents
Knuckle line type internal-rotating finny tail ship form Download PDFInfo
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- CN106697179A CN106697179A CN201510775434.3A CN201510775434A CN106697179A CN 106697179 A CN106697179 A CN 106697179A CN 201510775434 A CN201510775434 A CN 201510775434A CN 106697179 A CN106697179 A CN 106697179A
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- ship
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- propeller
- internal rotational
- knuckle line
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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 discloses a knuckle line type internal-rotating finny tail ship form, and belongs to the technical field of ships. The knuckle line type internal-rotating finny tail ship form comprises a propeller; the knuckle line type internal-rotating finny tail ship form is obtained by arranging a knuckle line on the basis of an internal-rotating finny tail ship form; and the position of the knuckle line is on the axial external side of the propeller in a ship length direction. The knuckle line type internal-rotating finny tail ship form has the advantages that guiding effects on a longitudinal flow and a side flow can be achieved and a rectifying effect can be also achieved.
Description
Technical field
The invention belongs to technical field of ships, and in particular to a kind of ship with a knuckle line and an internal rotational fin tail.
Background technology
Ship's lines species is various, and single line type stern suitable for r Zweier is just too numerous to enumerate, and being totally summed up mainly has common bracing strut r Zweier type, double ball tail ship types, split stern hull form, twin tail fin ship and double internal rotational fin tail ship types（That is whirlpool tail ship type）Five major classes.Their the characteristics of, embodies as follows respectively：
（1）Common bracing strut r Zweier type
Line style is simple, easily manufactured, wetted surface area is small, naked hull resistance is relatively low, but haves the shortcomings that the wake not enough resistance of appendage such as uniform, hull efficiency and the low, bracing strut of propulsive efficiency is big；
（2）Double ball tail ship types
Hull bilge whirlpool is substantially weakened, viscous drag reduction, and wake fraction increases and more wake is evenly distributed, and hull efficiency is improved with propulsive efficiency, and can reduce the propeller vibration caused because wake is uneven；
（3）Split stern hull form, twin tail fin ship：
Preswirl strengthens, and hull efficiency is significantly improved with propulsive efficiency, and drag overall increases less or without increase；
（4）Internal rotational fin tail ship type：
Apply whirlpool groove tail technology, make to form one stronger pre-selection in front of propeller and flow flowing under the inducing action of whirlpool groove, blade outwards, is arranged to the direction opposite with preswirl and rotated, be i.e. inward turning propeller by its direction of rotation, so eliminate wake flow rotary motion, energy loss is reduced, this hydrodynamics mechanism is similar with reaction fin in front of propeller or to turning the mechanism of oar, improve Ship Propeling efficiency, axial induced efficiency is mainly the increase in, anti-oar effect is commonly called as.Double internal rotational fin tail ship types can accommodate large radius-depth ratio（Airscrew diameter/ship tail drinking water）Propeller, improve the spacious water efficiency of propeller, be equal to the effect of tunnel tail.Double internal rotational fin tail ship types are also similar to double ball tail ship types, make the increase of stern wake fraction and wake is evenly distributed, and improve hull efficiency, reduce propeller vibration.
In the class ship type of the above five, preceding four class has the defect that footpath is limited in 0.7 or so than design parameter deeply, if because the oar footpath for increasing them will cause more violent propeller induced pulsating pressure so as to cause the high vibration of propeller top Bottom Plate.Due to the influence of this defect, while the better fit in order to seek ship, machine, oar, significantly limits common double propeller ship with big main engine power, the developing direction of king bolt oar diameter design.
And internal rotational fin tail ship type is successfully extended between 0.7 to 1.4 the scope of design of footpath depth ratio by its distinctive similar half conduit effect and the effect of similar tunnel tail, and less hull fluctuation pressure can be kept.Compared with other r Zweier types of same scale, the sharpest edges of double internal rotational fin tail ship types can be become using the airscrew diameter of more powerful marine main engine and more large scale in the case where ship, machine, the design principle of oar better fit is ensured.
Ship resistance and performance can include two problems of aspect, i.e. Ship Resistance and Ship Propeling.Common twin tail fin ship except employ large radius-depth than propeller and preswirl mechanism to obtain outstanding Ship Propeling efficiency in addition to, Ship Resistance is also reduced using vertical stream ship form design mechanism as far as possible, so that comprehensive obtain excellent ship resistance and performance energy.So-called vertical stream ship type, is directed to a relative concept of effluent ship type.In general, after the determination of ship type major parameter, different hull lines designs, its hull resistance value also can be far apart, this is because different shipforms can make the streamline for actually flowing through hull surface come in every shape, so as to influence the reason of the actual smooth degree of these spatial streamlines.Generally, current, are mainly called vertical stream ship type by the ship call effluent ship type for the main topside of pile warp hull two of current being flowed through along waterline direction from hull bottom along the ship that vertical section direction is flowed through.Wave making resistance is produced due to easily rising wave in the water surface during effluent, so vertical stream ship type is generally more much lower than the Ship Resistance of effluent ship type.But, applying to the cruiseway of shallower draft preferably vertical stream ship type more, because when the beam with drinking water than bigger, longitudinal flow more is carried out along hull bottom beneficial to more current, common twin tail fin ship is exactly improved while raising hull propulsive performance with this principle or keeps outstanding Ship Resistance performance.Generally, the drinking water of this kind of vertical stream ship type is than often bigger than normal, and such as larger than 6, the beam, the draft figures selection of common twin tail fin ship are also in compliance with this rule.But commonly its drinking water ratio of twin tail fin ship far reaches 9 or so, therefore its bottom stage casing Zong Liu region is relatively wide, on the one hand can so ensure that most water flow through the vertical stream section of bottom of ship and smoothly flow to afterbody from stem, be minimized Ship Resistance；On the other hand can ensure to have the water of abundance to form preswirl before oar, Ship Propeling efficiency is reached maximum.
For most of ships that transport, its drauht would generally be than larger the need for being loaded due to goods, and with reference to deep water harbour to ship length and width scale requirement, the value of the breadth draught ratio of such ship is generally less than normal.If drinking water directly applies mechanically common double tail finses ship form design theory than ship less than normal, its bottom stage casing Zong Liu regions relative narrower, so as to Ship Resistance and the improvement degree of propulsive efficiency cannot be made to reach most preferably.Ship model experiment is proved, if common twin tail fin ship is applied directly on the ship of such yardstick, even there is the phenomenon being increased dramatically in Ship Resistance while occurring that Ship Propeling efficiency makes moderate progress, often the increase degree of Ship Resistance has exceeded the improvement degree of propulsive performance, so as to cause ship resistance and performance not ideal enough.From hydrodynamics angle analysis, on the one hand this phenomenon is that the vertical stream of the analysis due to more than is not enough caused, and is on the other hand due to the complex flowfield in ship type propeller axis place vertical section to side of a ship side region.Because Ship's Dimension has determined, therefore the not enough defect of vertical stream cannot be improved, so just the ship of such yardstick must be reached rationally using the purpose of outstanding twin tail fin ship by carefully analyzing the formation mechenism of rear lateral complex flowfield, to the region taking effective rectification measure.
The content of the invention
A kind of ship with a knuckle line and an internal rotational fin tail is provided present invention aim to address above mentioned problem.The ship type be on the basis of the ship type of internal rotational fin tail be provided with a twin tail fin ship in chine, make the ship type play to indulge stream and effluent guiding function, reach rectification effect.
The technical solution adopted in the present invention is：
A kind of ship with a knuckle line and an internal rotational fin tail, including propeller, the ship with a knuckle line and an internal rotational fin tail are one chines of setting on the basis of the ship type of internal rotational fin tail, and the position of the chine is on the outside of the axle of the propeller along captain direction.
Further, the inner side of the propeller uses whirlpool groove tail cross-section.
Preferably, the footpath of the ship with a knuckle line and an internal rotational fin tail is deeply than being 0.7~1.5.
Further, the ship with a knuckle line and an internal rotational fin tail is particularly well-suited to drinking water than small ship.
The present invention has advantages below：
Ship type of the present invention is to be combined together internal rotational fin tail ship type and twin tail fin ship, chine in being provided with a twin tail fin ship on the basis of internal rotational fin tail ship type, make the ship type play to indulge stream and effluent guiding function, reach rectification effect, maximum possible makes the hull afterbody vertical and horizontal streamline smooth, lower hull resistance, solve small beam-draft ratio yardstick ship and the larger practical problem of resistance occur.Under the footpath deeply ratio, there is not emptying phenomenon deeply than being 0.7~1.5 in the footpath of ship type of the present invention, and ship normal/cruise is not had any impact.Ship type of the present invention goes back energy-conservation more than 20% while quick performance is ensured in terms of rapidity section simultaneously.
The ship type of ship type of the present invention including internal rotational fin tail, makes its cross section form for possessing similar double ball tails so that Wake Field is evenly distributed before propeller, thus propeller in normal operation uniform force and reduce the vibration of oar axle rotation；On the other hand, due to the injection effect of similar half conduit above its propeller, propeller top exciting force is effectively reduced, damping noise reduction effect is obvious and Fatigue Strength of Ship Hull Structures is effectively ensured.Proved by basin test, internal rotational fin tail ship type possesses very outstanding comfortableness, reliability.For ship resistance and performance, the present invention is based on internal rotational fin tail technology, whirlpool Cao Wei cross sections design form is used in propeller inside region, so as to effectively improve propeller wake fraction and propeller relative rotative efficiency, simultaneously because internal rotational fin tail can accommodate the characteristic of larger diameter propeller so that open water propeller efficiency increase, finally effectively improves Ship Propeling efficiency.The ship type of the present invention also ship type including internal rotational fin tail, makes the ship type have quick performance.
Brief description of the drawings
The present invention is further detailed explanation with implementation method below in conjunction with the accompanying drawings.
Fig. 1 is a kind of ship with a knuckle line and an internal rotational fin tail drawing in side sectional elevation provided in an embodiment of the present invention.
Specific embodiment
Reference picture 1, a kind of ship with a knuckle line and an internal rotational fin tail, including propeller.Ship with a knuckle line and an internal rotational fin tail is one chine 1 of setting on the basis of the ship type of internal rotational fin tail, and the position of chine 1 is in the outside of axle 2 of the propeller along captain direction.
The present embodiment ship type is used for reference using the cross-sectional form of chine of twin tail fin ship in propeller inside region using the cross-sectional form of whirlpool groove tail of common internal rotational fin tail ship type, in propeller exterior lateral area.On the one hand, by setting a chine 1 on the outside of propeller, complicated two-way curvature body lines is transformed into two sections of body lines of unidirectional curvature that chine is boundary, the guiding function of stream and effluent is indulged the region so as to play, rectification effect is reached, maximum possible makes the hull afterbody vertical and horizontal streamline smooth, lower hull resistance, solve small beam-draft ratio yardstick ship and the larger practical problem of resistance occur；On the other hand, whirlpool groove tail cross-section is used on the inside of propeller, relative rotative efficiency, the spacious water efficiency to be applicable major diameter propeller raising propeller for hull efficiency is improved with wake homogenization, propeller being improved with anti-oar effect, so that comprehensive improve Ship Propeling efficiency.It is common in terms of Ship Resistance and Ship Propeling two above to improve ship resistance and performance.Found by tank test, using knuckle internal rotational fin tail technology than keeping suitable superior level in terms of Ship Propeling efficiency using common internal rotational fin tail technology, and knuckle internal rotational fin tail reduces resistance up to more than 15% in terms of Ship Resistance.
The ship type of the present embodiment is based on internal rotational fin tail ship type, internal rotational fin tail ship type is for ship comfortableness, on the one hand, because internal rotational fin tail possesses the cross section form of similar double ball tails so that Wake Field is evenly distributed before propeller, thus propeller in normal operation uniform force and reduce the vibration of oar axle rotation；On the other hand, due to the injection effect of similar half conduit above its propeller, propeller top exciting force is effectively reduced, damping noise reduction effect is obvious and Fatigue Strength of Ship Hull Structures is effectively ensured.Proved by basin test, internal rotational fin tail ship type possesses very outstanding comfortableness, reliability.For ship resistance and performance, the ship type of the present embodiment is based on internal rotational fin tail technology, whirlpool Cao Wei cross sections design form is used in propeller inside region, so as to effectively improve propeller wake fraction and propeller relative rotative efficiency, simultaneously because internal rotational fin tail can accommodate the characteristic of larger diameter propeller so that open water propeller efficiency increase, finally effectively improves Ship Propeling efficiency.Found by tank test, possess 20% income in terms of Ship Propeling efficiency than application double tail finses technology using internal rotational fin tail technology, but more than 20% is increased in terms of Ship Resistance, the rapidity of such yardstick ship internal rotational fin tail ship type that comprehensively gets off is slightly poorer than twin tail fin ship.
Chine 1 is an important feature of double fin tail ship types, and the present embodiment ship type includes fin tail ship type.For twin tail fin ship, tail fin body can be divided into smooth curve and be connected and chine connection with the type of attachment of main hull.Studied by the campaign to twin tail fin ship and found, the Ship Resistance of the type of attachment twin tail fin ship of chine 1 connects much smaller than smooth curve.For the ships that transport less than normal to breadth draught ratio, the complex flowfield in vertical section where the propeller axis caused due to scale factor to ship side of a ship side region is main to be collectively formed by vertical stream part and side-stream portion, and the two proportion is suitable.Vertical flow field and effluent itself can't cause too much influence to Ship Resistance, but two kinds of current of different shape are in the same area while appearance, collective effect, by therebetween interfere and caused vortex energy loss will cause sharply increasing for Ship Resistance, so as to substantially reduce ship resistance and performance.In view of the research experience and inspiration of twin tail fin ship, the present embodiment ship type sets chine as shown in figure in the exterior lateral area of axle 2 of its propeller, longitudinal flow and lateral flow to the region water body play guiding function, reduce the interference effect of longitudinal and transverse flowing, make smooth in water flow, the effect of Ship Resistance is reduced so as to reach.
Design propeller is reasonably distributed to, circumferential wake according to oar front axle, causes that revolution speed of propeller declines the characteristics of due to major diameter propeller, the relation between revolution speed of propeller and engine speed need to be coordinated while propulsive efficiency is effectively improved.Transmission between main frame and propeller is realized by selection preferably gearbox speed reduction ratio, machine, the target of oar better fit is reached, energy-saving and emission-reduction is met, is expanded the design requirement of main engine power and airscrew diameter range of application.Drawn a conclusion by Data Comparison Analysis, the present embodiment ship type ratio application double tail finses technology energy-conservation more than 20% in terms of ship resistance and performance.
The footpath of the present embodiment ship type is deeply than being 0.7~1.5, most preferably 1.3.In the design process of common ship type, water is left to ensure that ship occurs without blade under propeller normal operating conditions in underloading or part cargo shipment navigation and phenomenon in being exposed to air, and it is unlikely to larger propeller exciting force occur in fully loaded voyage, the footpath of ship form design is compared deeply（The ratio of airscrew diameter and designed draft）0.7 or so is usually taken to be, is typically all not more than 1.Then, common ship type need to load a considerable amount of ballast waters in the operational configuration of ballast or part cargo shipment in ship afterbody ballast tank, to meet method of ship floating condition requirement.Obtained by experiment, the water pollution for being excessively used the ship energy loss and ballast that will bring unnecessary of ballast water for ship.The internal rotational fin tail ship type that the present embodiment ship type is introduced possesses the technical feasibility for solving ship Life cycle ballast-free problem completely.On the one hand; the footpath depth ratio that can determine the present embodiment ship type by the observation to the ship type model test can get 1.3 or so; even if blade surfaces above propeller under ship static state under the operating mode of underloading navigation and ballast-free; and work as the inducing action formed by the distinctive tunnel-effect of ship type and the propeller rotational after ship's navigation is got up so that water body naturally full of the whole card of propeller without blade emptying phenomenon, so as to effectively protect propeller.On the other hand, from hydrodynamic force Analysis on Mechanism, due to the distinctive similar half conduit effect of the present embodiment ship type, effective helix angle oar top exciting force, damping noise reduction effect is obvious.So, the present embodiment ship type can realize ship Life cycle ballast-free completely.Experiment shows that the present embodiment ship type is normal deeply than up to propeller works in 1.3 trystate in footpath, emptying phenomenon does not occur, and ship normal/cruise is not had any impact.
The present embodiment ship type is to be combined together internal rotational fin tail ship type and twin tail fin ship, chine in being provided with a twin tail fin ship on the basis of internal rotational fin tail ship type, make the ship type play to indulge stream and effluent guiding function, reach rectification effect, maximum possible makes the hull afterbody vertical and horizontal streamline smooth, lower hull resistance, solve small beam-draft ratio yardstick ship and the larger practical problem of resistance occur.Than being 0.7~1.5, there is not emptying phenomenon deeply in the footpath of the ship type, and ship normal/cruise is not had any impact.
The ship type of the present embodiment ship type including internal rotational fin tail, makes the present embodiment ship type possess the cross section form of similar double ball tails so that Wake Field is evenly distributed before propeller, thus propeller in normal operation uniform force and reduce the vibration of oar axle rotation；On the other hand, due to the injection effect of similar half conduit above its propeller, propeller top exciting force is effectively reduced, damping noise reduction effect is obvious and Fatigue Strength of Ship Hull Structures is effectively ensured.Proved by basin test, internal rotational fin tail ship type possesses very outstanding comfortableness, reliability.For ship resistance and performance, the present invention is based on internal rotational fin tail technology, whirlpool Cao Wei cross sections design form is used in propeller inside region, so as to effectively improve propeller wake fraction and propeller relative rotative efficiency, simultaneously because internal rotational fin tail can accommodate the characteristic of larger diameter propeller so that open water propeller efficiency increases, Ship Propeling efficiency finally is effectively improved, while internal rotational fin tail has larger in propulsive efficiency.The present embodiment ship type also ship type including internal rotational fin tail, makes the ship type have quick performance.
It should be noted last that, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although being described in detail to the present invention with reference to preferred embodiment, it will be understood by those within the art that, technical scheme can be modified or equivalent, without deviating from the spirit and scope of technical solution of the present invention, it all should cover in the middle of scope of the presently claimed invention.
Claims (4)
1. a kind of ship with a knuckle line and an internal rotational fin tail, including propeller, characterized in that, the ship with a knuckle line and an internal rotational fin tail is one chine of setting on the basis of the ship type of internal rotational fin tail, the position of the chine is on the outside of the axle of the propeller along captain direction.
2. ship with a knuckle line and an internal rotational fin tail according to claim 1, it is characterised in that the inner side of the propeller uses whirlpool groove tail cross-section.
3. ship with a knuckle line and an internal rotational fin tail according to claim 1, it is characterised in that the footpath of the ship with a knuckle line and an internal rotational fin tail is deeply than being 0.7~1.5.
4. the ship with a knuckle line and an internal rotational fin tail according to any one of claims 1 to 3, it is characterised in that the ship with a knuckle line and an internal rotational fin tail is particularly well-suited to drinking water than small ship.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510775434.3A CN106697179A (en) | 2015-11-15 | 2015-11-15 | Knuckle line type internal-rotating finny tail ship form |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510775434.3A CN106697179A (en) | 2015-11-15 | 2015-11-15 | Knuckle line type internal-rotating finny tail ship form |
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| Publication Number | Publication Date |
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| CN106697179A true CN106697179A (en) | 2017-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510775434.3A Withdrawn CN106697179A (en) | 2015-11-15 | 2015-11-15 | Knuckle line type internal-rotating finny tail ship form |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109866870A (en) * | 2019-03-28 | 2019-06-11 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | A kind of ice navigation ship bow outline |
| JP2019200752A (en) * | 2018-05-18 | 2019-11-21 | 国立研究開発法人 海上・港湾・航空技術研究所 | Wake flow field design method, wake flow field design system, and ship considering wake flow field |
-
2015
- 2015-11-15 CN CN201510775434.3A patent/CN106697179A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019200752A (en) * | 2018-05-18 | 2019-11-21 | 国立研究開発法人 海上・港湾・航空技術研究所 | Wake flow field design method, wake flow field design system, and ship considering wake flow field |
| JP7178077B2 (en) | 2018-05-18 | 2022-11-25 | 国立研究開発法人 海上・港湾・航空技術研究所 | Wake field design method, wake field design system, and ship considering wake field |
| CN109866870A (en) * | 2019-03-28 | 2019-06-11 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | A kind of ice navigation ship bow outline |
| CN109866870B (en) * | 2019-03-28 | 2023-09-22 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Bow line type of ice area navigation ship |
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Application publication date: 20170524 |