CN103332281A - Pre-rotation triangular conduit for right-handed rotation single screw vessel - Google Patents
Pre-rotation triangular conduit for right-handed rotation single screw vessel Download PDFInfo
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- CN103332281A CN103332281A CN2013103069451A CN201310306945A CN103332281A CN 103332281 A CN103332281 A CN 103332281A CN 2013103069451 A CN2013103069451 A CN 2013103069451A CN 201310306945 A CN201310306945 A CN 201310306945A CN 103332281 A CN103332281 A CN 103332281A
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- leaf
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- propeller
- screw propeller
- prewhirling
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Abstract
The invention discloses a pre-rotation triangular conduit for a right-handed rotation single screw vessel. The pre-rotation triangular conduit has a fan-shaped structure; seen from the rear side of a screw propeller, a second blade and a first blade are arranged from top to bottom on the left side of a longitudinal central line of a propeller hub of the screw propeller, and a third blade is arranged on the right side; a blade back of a guide plate is fixedly connected with a blade tip of the first blade, a blade tip of the second blade and a blade tip of the third blade respectively; the included angle range of the first blade and the longitudinal central line of the propeller hub of the screw propeller is 70-75 degrees; the included angle range of the second blade and the longitudinal central line of the propeller hub of the screw propeller is 25-30 degrees; and the included angle range of the third blade and the longitudinal central line of the propeller hub of the screw propeller is 70-75 degrees. By using the principle of pre-rotation before the propeller and screw propeller upper inlet flow acceleration, the pre-rotation triangular conduit is a piece of body energy saving equipment with more uniform inlet flow of the screw propeller disk; and importantly, the energy lost due to rotation of a wake flow field of the screw propeller is reduced, the screw propeller propulsive efficiency is improved and the additional form resistance due to tail flow separation is reduced.
Description
Technical field
The present invention relates to the hull energy-saving equipment technology of dextrorotation single-blade ship, more particularly, relate to a kind of triangle conduit of prewhirling for dextrorotation single-blade ship.
Background technology
In the use of dextrorotation single-blade ship, thereby domestic and international research has been recognized by changing the propulsion coefficient that screw propeller influent stream direction can improve screw propeller and has been reached energy-conservation effect.At present prewhirl fin, the fin of prewhirling of the energy saver that adopts adds full conduit and Mewis Duct etc., but there is the low and wake of propeller propulsion coefficient problem such as even inadequately in existing apparatus.
Summary of the invention
At the defective that exists in the prior art, the purpose of this invention is to provide a kind of triangle conduit of prewhirling for dextrorotation single-blade ship, not only reduce in the propeller wake field energy because of spin loss, improve propeller propulsive efficiency; But also even wake makes screw propeller work more steady, reduces propeller exciting force, reduces the ship vibration risk, makes that attached body structure is firm, overcomes problems such as intensity, tired vibration easily.
For achieving the above object, the present invention adopts following technical scheme:
A kind of triangle conduit of prewhirling for dextrorotation single-blade ship is located between the screw propeller and hull of stern,
The described triangle conduit of prewhirling is sector structure, from the screw propeller rear side, propeller hub longitudinal centerline left side is provided with second leaf, first leaf from top to bottom, and the right side is provided with the 3rd leaf, the equal in length of described first leaf, second leaf and the 3rd leaf; The blade root of the blade root of the blade root of described first leaf, second leaf and the 3rd leaf is captiveed joint with the screw propeller axle sleeve outside respectively; The blade back of guide plate is captiveed joint with the blade tip of first leaf, the blade tip of second leaf and the blade tip of the 3rd leaf respectively;
The section of the section of the section of described first leaf, second leaf, the 3rd leaf and the section of guide plate are the airfoil type section;
The guide margin of the guide margin of the guide margin of described first leaf, second leaf, the 3rd leaf and the guide margin of guide plate be relative with hull side all; The lagging edge of the lagging edge of the lagging edge of first leaf, second leaf, the 3rd leaf and the guide margin of guide plate are all relative with the screw propeller side;
The blade face of described first leaf down, blade back is up;
The blade face of described the 3rd leaf up, blade back is down;
The blade face of described second leaf is relative with the blade back of first leaf, and the blade back of second leaf is relative with the page of the 3rd leaf;
Wherein, the angular range of first leaf and propeller hub longitudinal centerline is 70 °-75 °, the angular range of second leaf and propeller hub longitudinal centerline is 25 °-30 °, and the angular range of the 3rd leaf and propeller hub longitudinal centerline is 70 °-75 °.
From blade root toward the direction of blade tip, the angle of the projection that the blade face of described first leaf puts at prop shaft and the axis of screw propeller axle sleeve is that the blade face of first leaf is along 12 °-17 ° of axis left-hand revolutions; The angle of the projection that the blade face of described second leaf puts at prop shaft and the axis of screw propeller axle sleeve is that the blade face of second leaf is along 10 °-15 ° of axis left-hand revolutions; The angle of the projection that the blade face of described the 3rd leaf puts at prop shaft and the axis of screw propeller axle sleeve is that the blade face of the 3rd leaf is along 14 °-18 ° of axis left-hand revolutions.
The thickness ratio of described first leaf, the thickness ratio of second leaf and the thickness ratio of the 3rd leaf are 10.
The thickness ratio of described conduit is 7.
The length of described the 3rd leaf is the 90%-105% of propeller radius.
Compared with prior art, adopt a kind of triangle conduit of prewhirling for dextrorotation single-blade ship of the present invention to have following technique effect:
The present invention compares with the existing fin of prewhirling: one, and more firm on the structure, overcome problems such as intensity, tired vibration easily; Its two, under the square one, can used thickness than littler section, additional resistance is littler, the better effects if of prewhirling; Its three, increased the valve action of top catheter segment, beneficial to the incoming flow that increases propeller disk, be beneficial to and reach better energy-saving effect.Add full conduit with the fin of prewhirling and compare, avoided the fearless interference to good influent stream field, bottom, reduce the wetted surface area of energy-conservation attached body, because present hull form has all passed through abundant optimization, there is not obvious defects in wake.Compare with Mewis Duct, the triangle conduit of prewhirling of the present invention is concentric with propeller axis, is conducive to processing and location.
In a word, principle and accelerate screw propeller top influent stream the present invention relates to prewhirl before a kind of employing oar, make propeller disk influent stream hull energy-saving equipment more uniformly, focus on reducing the energy that propeller wake field is lost because of rotation, improve propeller propulsive efficiency and minimizing because of the additional form resistance of afterbody flow separation.
Description of drawings
Fig. 1 is installed in the scheme of installation of the stern of hull for the present invention;
Fig. 2 among Fig. 1 from A to the structural representation of seeing the triangle conduit of prewhirling for dextrorotation single-blade ship of the present invention;
Fig. 3 is the generalized section of leaf of the present invention and conduit;
Fig. 4 is the airfoil type section definition scheme drawing of three leaves of the present invention and conduit.
The specific embodiment
Further specify technical scheme of the present invention below in conjunction with accompanying drawing and embodiment.
According to features such as hull wake characteristics CFD calculating or that model experiment is measured and screw propeller hand of rotation, invent the preceding triangle conduit of prewhirling of asymmetric arrangement fully of oar of low powered stern in a kind of being loaded on, to improve propulsion coefficient, evenly wake reduces the ship vibration risk.
A kind of triangle conduit of prewhirling for dextrorotation single-blade ship as shown in Figure 1 and Figure 2 is located between the screw propeller 20 and hull 21 of stern, it is characterized in that:
The triangle conduit of prewhirling of the present invention is sector structure, from screw propeller 20 rear sides, the stern in propeller hub longitudinal centerline left side is provided with second leaf 12, first leaf 11 from top to bottom, the right side is provided with the equal in length of the 3rd leaf 13, the first leaves 11, second leaf 12 and the 3rd leaf 13; The blade root of the blade root of the blade root of first leaf 11, second leaf 12 and the 3rd leaf 13 is captiveed joint with screw propeller axle sleeve 22 outsides respectively; The blade back of guide plate 14 is captiveed joint with the blade tip of first leaf 11, the blade tip of second leaf 12 and the blade tip of the 3rd leaf 13 respectively;
The section of the section of the section of first leaf, second leaf, the 3rd leaf and the section of guide plate are the airfoil type section,
The guide margin of the guide margin of the guide margin of first leaf, second leaf, the 3rd leaf and the guide margin of guide plate be relative with hull side all; The lagging edge of the lagging edge of the lagging edge of first leaf, second leaf, the 3rd leaf and the guide margin of guide plate are all relative with the screw propeller side;
The blade face of described first leaf down, the blade back of first leaf is up;
The blade face of described the 3rd leaf up, the blade back of the 3rd leaf is down;
The blade face of described second leaf is relative with the blade back of first leaf, and the blade back of second leaf is relative with the page of the 3rd leaf;
Wherein, included angle B 1 scope of first leaf and propeller hub longitudinal centerline is 70 °-75 ° (adopting 72 ° of preferable angles among Fig. 1), included angle B 2 scopes of second leaf and propeller hub longitudinal centerline are 25 °-30 ° (adopting 28 ° of preferable angles among Fig. 1), included angle B 3 scopes of the 3rd leaf and propeller hub longitudinal centerline are 70 °-75 ° (adopting 72 ° of preferable angles among Fig. 1), can accelerate screw propeller top influent stream like this, make the propeller disk influent stream more even, improve propeller propulsive efficiency.
From blade root toward the direction of blade tip, the projection that the blade face of described first leaf puts at prop shaft and the angle a1 of the axis of screw propeller axle sleeve are that the blade face of first leaf is along 12 °-17 ° of axis left-hand revolutions (the preferable angle of employing is 17 ° among Fig. 1); The angle a2 of the projection that the blade face of described second leaf puts at prop shaft and the axis of screw propeller axle sleeve is that the blade face of second leaf is along 10 °-15 ° of axis left-hand revolutions (adopting 15 ° of preferable angles) among Fig. 1; The angle a3 of the projection that the blade face of described the 3rd leaf puts at prop shaft and the axis of screw propeller axle sleeve is that the page of the 3rd leaf is along 14 °-18 ° of axis left-hand revolutions (adopting 18 ° of preferable angles) among Fig. 1, adopt the principle of prewhirling before the oar, focus on reducing the energy that propeller wake field is lost because of rotation, improve propeller propulsive efficiency.
See also again shown in Figure 3, the thickness of first leaf 11 than the thickness of, second leaf 12 than and the thickness ratio of the 3rd leaf 13 be 10, the thickness ratio of guide plate 14 is 7.Need to prove that satisfying under the situation that structural strength requires, thickness can reduce friction drag than the smaller the better, above fixed thickness than being by obtaining that finite element software calculates.
The present invention is made up of leaf and the guide plate of 3 complete asymmetric arrangement, and the section shape of leaf and the section shape of guide plate are chosen the wing middle little series of drag by lift of NACA, and its intensity need be adjusted according to leaf and the suffered live load of guide plate.The layout of triangle conduit of prewhirling is seen Fig. 1, and its basic arrangement principle is 2 leaves in dextrorotation single-blade ship left side at routine, 1 leaf in right side.
According to our research, the length of leaf also will could guarantee good energy-saving effect in certain scope, and the outer top end of leaf will be in the scope of 90%R-105%R, and wherein R is propeller radius.
This equipment is installed on the hull before the screw propeller, by changing the pre-rotation flow field before flow field direction produces oar, thereby reaches the minimizing degradation of energy, improves the purpose of propeller propulsive efficiency.Carry out detailed leaf layout and anglec of rotation optimization at ship wake field characteristics after, can reach considerable energy-saving effect.Simultaneously, determine leaf and the supravasal live load of triangle in conjunction with hydrodynamic load and the ship motion of afterbody, and then check intensity.
For example: after the triangle conduit application CFD software of prewhirling of the present invention carries out leaf layout and angle optimization, be installed on the VLCC, carry out model experiment at HSVA, the forecast result: at 15.5 joints, minimizing consumption of power 3.9%.
Need to prove, the section of described three leaves and guide plate is the airfoil type section, the definition of airfoil type section as shown in Figure 4, wherein, 81 is that the blade face, 82 of airfoil type section is the lagging edge of airfoil type section for the guide margin of airfoil type section, 84 for the blade back of airfoil type section, 83.
Those of ordinary skill in the art will be appreciated that, above embodiment illustrates purpose of the present invention, and be not as limitation of the invention, as long as in essential scope of the present invention, all will drop in the scope of claim of the present invention variation, the modification of the above embodiment.
Claims (5)
1. the triangle conduit of prewhirling that is used for dextrorotation single-blade ship is located between the screw propeller and hull of stern, it is characterized in that:
The described triangle conduit of prewhirling is sector structure, from the screw propeller rear side, propeller hub longitudinal centerline left side is provided with second leaf, first leaf from top to bottom, and the right side is provided with the 3rd leaf, the equal in length of described first leaf, second leaf and the 3rd leaf; The blade root of the blade root of the blade root of described first leaf, second leaf and the 3rd leaf is captiveed joint with the screw propeller axle sleeve outside respectively; The blade back of guide plate is captiveed joint with the blade tip of first leaf, the blade tip of second leaf and the blade tip of the 3rd leaf respectively;
The section of the section of the section of described first leaf, second leaf, the 3rd leaf and the section of guide plate are the airfoil type section;
The guide margin of the guide margin of the guide margin of described first leaf, second leaf, the 3rd leaf and the guide margin of guide plate be relative with hull side all; The lagging edge of the lagging edge of the lagging edge of first leaf, second leaf, the 3rd leaf and the guide margin of guide plate are all relative with the screw propeller side;
The blade face of described first leaf down, blade back is up;
The blade face of described the 3rd leaf up, blade back is down;
The blade face of described second leaf is relative with the blade back of first leaf, and the blade back of second leaf is relative with the page of the 3rd leaf;
Wherein, the angular range of first leaf and propeller hub longitudinal centerline is 70 °-75 °, the angular range of second leaf and propeller hub longitudinal centerline is 25 °-30 °, and the angular range of the 3rd leaf and propeller hub longitudinal centerline is 70 °-75 °.
2. the triangle conduit of prewhirling according to claim 1 is characterized in that:
From blade root toward the direction of blade tip, the blade face of described first leaf is along the axis left-hand revolution, and the angular range of the projection that the blade face of described first leaf puts at prop shaft and the axis of screw propeller axle sleeve is 12 °-17 °;
From blade root toward the direction of blade tip, the blade face of described second leaf is along the axis left-hand revolution, and the angular range of the projection that the blade face of described second leaf puts at prop shaft and the axis of screw propeller axle sleeve is 10 °-15 °;
From blade root toward the direction of blade tip, the blade face of described the 3rd leaf is along the axis left-hand revolution, and the angular range of the projection that the blade face of described the 3rd leaf puts at prop shaft and the axis of screw propeller axle sleeve is 14 °-18 °.
3. the triangle conduit of prewhirling according to claim 1 is characterized in that:
The thickness ratio of described first leaf, the thickness ratio of second leaf and the thickness ratio of the 3rd leaf are 10.
4. the triangle conduit of prewhirling according to claim 1 is characterized in that:
The thickness ratio of described guide plate is 7.
5. the triangle conduit of prewhirling according to claim 1 is characterized in that:
The length of described the 3rd leaf is the 90%-105% of propeller radius.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310306945.1A CN103332281B (en) | 2013-07-19 | 2013-07-19 | Triangle conduit of prewhirling for dextrorotation single-blade ship |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310306945.1A CN103332281B (en) | 2013-07-19 | 2013-07-19 | Triangle conduit of prewhirling for dextrorotation single-blade ship |
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| CN103332281A true CN103332281A (en) | 2013-10-02 |
| CN103332281B CN103332281B (en) | 2017-03-08 |
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Cited By (8)
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| CN103661898A (en) * | 2013-12-19 | 2014-03-26 | 中国船舶科学研究中心上海分部 | Triangle front-arranged guide wheel |
| CN103770919A (en) * | 2014-01-23 | 2014-05-07 | 上海船舶研究设计院 | Prerotation fan-shaped conduit for right-handed single-screw ship |
| CN104608895A (en) * | 2014-12-22 | 2015-05-13 | 中国船舶重工集团公司第七○二研究所 | Ship stern flow energy recovery device in sector structural style |
| CN106985990A (en) * | 2017-03-15 | 2017-07-28 | 中船重工（上海）节能技术发展有限公司 | A kind of preposition flap peculiar to vessel |
| CN107985538A (en) * | 2017-12-02 | 2018-05-04 | 中船重工（上海）节能技术发展有限公司 | A kind of guide plate type ring duct peculiar to vessel |
| CN111295329A (en) * | 2017-10-31 | 2020-06-16 | 三星重工业株式会社 | Propulsion efficiency hoisting device |
| CN111976937A (en) * | 2020-09-01 | 2020-11-24 | 上海船舶运输科学研究所 | Sweepback wing type propulsion efficiency improving device |
| CN115071938A (en) * | 2022-06-29 | 2022-09-20 | 广船国际有限公司 | Front-mounted energy-saving device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103661898A (en) * | 2013-12-19 | 2014-03-26 | 中国船舶科学研究中心上海分部 | Triangle front-arranged guide wheel |
| CN103770919A (en) * | 2014-01-23 | 2014-05-07 | 上海船舶研究设计院 | Prerotation fan-shaped conduit for right-handed single-screw ship |
| CN104608895A (en) * | 2014-12-22 | 2015-05-13 | 中国船舶重工集团公司第七○二研究所 | Ship stern flow energy recovery device in sector structural style |
| CN106985990A (en) * | 2017-03-15 | 2017-07-28 | 中船重工（上海）节能技术发展有限公司 | A kind of preposition flap peculiar to vessel |
| CN111295329A (en) * | 2017-10-31 | 2020-06-16 | 三星重工业株式会社 | Propulsion efficiency hoisting device |
| JP7145945B2 (en) | 2017-10-31 | 2022-10-03 | サムスン・ヘヴィー・インダストリーズ・カンパニー・リミテッド | Propulsion efficiency improvement device |
| CN107985538A (en) * | 2017-12-02 | 2018-05-04 | 中船重工（上海）节能技术发展有限公司 | A kind of guide plate type ring duct peculiar to vessel |
| CN111976937A (en) * | 2020-09-01 | 2020-11-24 | 上海船舶运输科学研究所 | Sweepback wing type propulsion efficiency improving device |
| CN115071938A (en) * | 2022-06-29 | 2022-09-20 | 广船国际有限公司 | Front-mounted energy-saving device |
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