CN2799391Y - Ship body capable of reducing water resistance - Google Patents
Ship body capable of reducing water resistance Download PDFInfo
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- CN2799391Y CN2799391Y CN 200520041787 CN200520041787U CN2799391Y CN 2799391 Y CN2799391 Y CN 2799391Y CN 200520041787 CN200520041787 CN 200520041787 CN 200520041787 U CN200520041787 U CN 200520041787U CN 2799391 Y CN2799391 Y CN 2799391Y
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- hull
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Abstract
The utility model relates to a hull capable of reducing water resistance. The head parts and the tail parts of the bottom plate of the hull and a draught part of the hull, which are in parallel with the cross-section of the bottom plate, are both in a wedge shape especially an acuate triangle. A hull side plate of the draught part is perpendicular to the bottom plate of the hull, and a deck can be in an ellipse shape, a shuttle shape or other shapes. The structure and the function of the utility model is identical with the existing ship, a cambered surface for transition is arranged between the deck of the ship and the hull side plate of the draught part, the head part and the tail part of the bottom plate of the hull, which are both in acuate triangle can be connected integrally, which forms the diamond bottom plate of the hull; the head part and the tail part of the bottom plate of the hull can also be designed into a wedge shape or a pointed triangle, and the middle part is in a rectangle or a drum shape. The utility model can decrease the water resistance borne by the integral hull and have the advantages of increased sailing speed, energy saving, reduced sailing expense, reduced pollution discharge, environmental protection, good stability, convenient fabrication, etc.
Description
Technical field the utility model relates to a kind of hull, particularly a kind of hull that reduces water resistance.
The existing naval vessel of background technology hull head mostly is circular arc or pointed shape, and its hull afterbody is often made the vertical plane surface shape, according to the afterbody drag effect, the water resistance that this hull is subjected to when navigation is still very big, need seek further to reduce the novel hull design scheme of water resistance.
The summary of the invention the purpose of this utility model provides a kind of hull that reduces water resistance that can reduce whole hull institute water resistance.
The utility model is realized by following technical proposal: a kind of hull that reduces water resistance, its hull base plate and hull drinking water partial parallel all are wedge shapes in the head and the afterbody of the cross-sectional plane of base plate, particularly sharp triangle, the hull side plate of drinking water part is perpendicular to the hull base plate.Ship deck can be ellipse, fusiformis or other shape, and its 26S Proteasome Structure and Function can be equal to existing naval vessel, has cambered surface excessive between the hull side plate of ship deck and drinking water part.Head and the afterbody that is sharp leg-of-mutton hull base plate can be fused, constitute rhombus hull base plate; Also the head and the afterbody of hull base plate can be designed to wedge shape or sharp triangle, its middle part is rectangle or cydariform.
Cause the water resistance effect owing to self having certain water side when hull navigates by water in water, I am called the cross section water resistance that meets water to this water resistance effect.Real ship therefore also can be subjected to the effect of water viscous force, but the cross section water resistance is more a lot of greatly than water viscous force because the outside face of drinking water part hull is not desirable smooth, and therefore, I mainly discuss cross section water resistance effect here.Below the condition that possesses during derivation cross section water resistance expression formula be that movable body is an osed top, and self have certain drinking water cross section, i.e. upstream face, below the water resistance formula of vertical cross-section of meeting water of deriving earlier.
If the drinking water vertical sectional area perpendicular to the ship motion direction is S, the hull sole mass is M, water tightness is ρ, the speed of hull when at the uniform velocity navigating by water is V, the drinking water vertical cross-section is with the thick static vertical water layer infinitesimal of speed V bump front one dl, in-service time is dt, then behind bump, the vertical water layer infinitesimal that is clashed into also travels forward with identical speed V, dl=Vdt is arranged, the momentum change of the vertical water layer infinitesimal that then causes is dP=dmV, dm=dlS ρ=VdtS ρ, then dP=VdtS ρ * V=dtS ρ V
2, in addition, the momentum dI=Fdt that vertical water layer infinitesimal is subjected to, the momentum that is subjected to according to the vertical water layer infinitesimal of momentum theorem equals the variation of momentum, dP=dI, i.e. dtS ρ V
2=Fdt, the dt that divides out obtains F=S ρ V
2This F is exactly the application force of drinking water vertical cross-section to water, and according to application force and antagonistic force principle, just water is to the resistance of drinking water vertical cross-section for F, and the vertical cross-section water resistance promptly meets water.
The oblique section water resistance formula that meets water of deriving again: the inclination angle of establishing the drinking water oblique section is θ (angle of oblique section and ship motion direction), the drinking water vertical sectional area is S, the area of drinking water oblique section is S/sin θ, hull sole mass with drinking water oblique section is M, water tightness is ρ, the speed of hull when at the uniform velocity navigating by water is V, the drinking water oblique section is the static water layer infinitesimal of inclination of θ with the thick inclination angle of speed Vsin θ bump front one dl, in-service time is dt, then behind bump, the static water layer infinitesimal of inclination that is clashed into travels forward with speed Vsin θ, dl=Vsin θ dt is arranged, the momentum change of the inclination water layer infinitesimal that then causes is dP=dmVsin θ, dm=dl * S/sin θ ρ=Vsin θ dt * S/sin θ ρ=VdtS ρ, then dP=VdtS ρ * Vsin θ=dtS ρ V
2Sin θ, in addition, the momentum dI=Fdt that vertical water layer infinitesimal is subjected to has dP=dI, i.e. dtS ρ V according to momentum theorem
2Sin θ=Fdt, the dt that divides out obtains F=S ρ V
2Sin θ, what this F represented is the vertical water resistance of water to the oblique section, can be decomposed into the component of both direction, one is the water resistance consistent with sense of motion, another is the water application force vertical with sense of motion, we know that the water resistance consistent with sense of motion just can do negative work to advancing of hull, so effective water resistance of being subjected to of hull, and the formula of the oblique section water resistance that promptly meets water is: F=S ρ V
2Sin θ * sin θ=S ρ V
2Sin2 θ.
Hull not only runs into the head-on water resistance of ship motion direction when navigating by water in water, also be subjected to the afterbody water resistance effect of draft hull simultaneously.When hull navigates by water forward, if the draft hull afterbody has sailed out of certain zone in the small time, this zone can be replenished rapidly by water on every side immediately, that is to say the motion that at every moment all has hydrone trailing the draft hull afterbody with its specific speed, all to cause the variation of hydrodynamic(al) amount, cause being subjected to the effect of water resistance.Therefore, when hull navigated by water in water, head and afterbody all will cause the motion of water, and the two causes that the effect of the motion of water is the same, and when its shape was all the same, the water resistance that they are subjected to was also identical.So, during the designed draft hull shape, not only to consider the draft hull head, and consider the draft hull afterbody.When we are designed to diamond pattern to draft hull, draft hull afterbody and head all are pointed, because symmetry, the effect component of left and right directions water resistance has been cancelled out each other, hull only is subjected to the cross section water resistance consistent with sense of motion, and this free area water resistance expression formula is F=2S ρ V
2(head water resistance and afterbody water resistance respectively are sin2 θ: F
1=S ρ V
2Sin2 θ).Wherein θ is half of head (afterbody) wedge angle, and S is the maximum perpendicular sectional area of draft hull, and ρ is the density of water, and V is the speed of hull self navigation.Can see that from following formula the water resistance that hull is subjected to is relevant with the wedge angle of draft hull head and afterbody, and with square being directly proportional of θ sine.Reduce the wedge angle of portion end to end, will reduce the water resistance that hull is subjected to exponentially.If will be the head and the afterbody of sharp leg-of-mutton hull base plate fuses, constitute rhombus hull base plate, like this in desired length of hull design charter and width dimensions, can make the pointed degree maximum of portion end to end, be its wedge angle minimum, so the water resistance minimum that the rhombus hull is subjected to when navigation.
A kind of hull that reduces water resistance that the utility model provides is compared with existing naval vessel, can reduce whole hull institute water resistance greatly, after this technology implementation is used, can increase substantially the route speed of warship or boats and ships, thereby can improve the defensive operation ability of China naval and the transport capacity of ship for civil use greatly, perhaps the naval vessel navigates by water under traditional speed of a ship or plane, and then energy savings greatly reduces the navigation expense.The rhombus hull has good stability, and can not produce the fore lifting and the phenomenon of stern decline when quick sailing, but keeps horizontality always.The diamond pattern hull is unconventional simple geometry body then, and its manufacturing process is simply more a lot of than present hull, thereby can shorten manufacturing schedule and reduce manufacturing cost.In a word, can improve the speed of a ship or plane, energy savings reduction navigation expense thereby the utlity model has, reduce blowdown, environmental, good stability is convenient to advantages such as manufacturing.
Description of drawings further specifies the utility model below in conjunction with drawings and Examples.
Fig. 1 is the scheme drawing of rhombus hull base plate.
Fig. 2 is the scheme drawing of rhombus hull drinking water part.
Fig. 3 is a scheme drawing of being furnished with the diamond pattern hull on oval deck.
Fig. 4 is a scheme drawing of being furnished with the diamond pattern hull on fusiformis deck.
Fig. 5 is that two ends are wedge shape, and the middle part is the hull base plate scheme drawing of cydariform.
Specific embodiments embodiment is shown in Fig. 1-2: a kind of hull that reduces water resistance, its ship hull base plate (1) and hull drinking water partial parallel are the sharp triangles that fuses in the head and the afterbody of the cross-sectional plane of base plate, and constituting water resistance is minimum rhombus hull.The hull side plate (2) of drinking water part is perpendicular to hull base plate (1).Hull base plate (1) has cambered surface excessive between the hull side plate (1) of drinking water part and the hull Texas deck (3).
Embodiment 1: the comparison of being furnished with diamond pattern hull warship (Fig. 3) Yu Shenzhen destroyer on oval deck:
Shenzhen number, trip's sea level (051B type) guided missile armed destroyer:
Displacement: 6000 tons (being fully loaded with).
Major dimension: 153 meters of total lengths; Wide 16.5 meters; Absorb water 6 meters.
Host C ODOG, 48600 horsepowers.
The speed of a ship or plane: 30 joints.
Calculate the corresponding parameter of diamond pattern hull warship by following formula:
Displacement=captain * warship is wide * and drinking water is high/2, and unit be ton;
Maximum perpendicular section S=warship is wide * and drinking water is high, and unit is a sq m;
θ is half of head (afterbody) wedge angle, sin
2θ=warship wide square/the wide sum of squares with the captain of warship;
ρ=1000 ton every cubic meter; Power=2sin
2θ S ρ V
3(/ 735), unit is watt (horsepower)
If the major dimension between the two is identical, then the displacement of diamond pattern hull warship is 7573.5 tons, is slightly larger than Shenzhen number.The speed of a ship or plane that calculates with same main frame power is 25 metre per second (m/s)s, closes 48 joints (speed of a ship or plane 1 joint is 1 nautical mile of a speed per hour, and 1 nautical mile is about 1852 meters), than 167 Shenzhen number big 18 joints; The main frame power that calculates with the same speed of a ship or plane is 12000 horsepowers, is 1/4th of Shenzhen power, that is energy consuming ratio it saved 3/4ths.From power consumption, diamond pattern hull warship lacks a lot than existing naval vessel.
Embodiment 2: the comparison of being furnished with diamond pattern hull warship (Fig. 4) Yu Zhuhai destroyer on fusiformis deck: Zhuhai number, and Luda level (051G2 type):
Displacement: 3250 tons (standard), 3670 tons (being fully loaded with)
Major dimension: long 132 meters, wide 12.8 meters, absorb water 4.6 meters
Main frame: 2 boilers, 2 steam turbines, 72000 horsepowers, twin shaft
The speed of a ship or plane: 32 joints
If the major dimension between the two is identical, then the displacement of diamond pattern hull warship is 3886 tons, is slightly larger than the full load displacement in 166 Zhuhai number.The speed of a ship or plane that calculates with same main frame power is 36.3 metre per second (m/s)s, closes 70 joints, is that the twice of Zhuhai speed of a ship or plane is many; The main frame power that calculates with the same speed of a ship or plane is 7000 horsepowers, is 1/10th of Zhuhai power, that is energy consuming ratio it saved 9/10ths.
Embodiment 3: the comparison of being furnished with diamond pattern hull aircraft carrier and U.S.'s Nimitz level nuclear aircraft carrier on aircraft carrier deck:
U.S.'s Nimitz level nuclear aircraft carrier
Displacement: 72916 tons (underloading), 1487 tons (being fully loaded with)
Major dimension: long 332.9 meters, wide 40.8 meters, drinking water 11.3-11.9 rice
Main frame: the A4W/A1G of 2 General Electric (GE) pressurized water reactor, 4 steam turbines, 260000 horsepowers;
4 emergency diesel-oil machines, 10720 horsepowers, 4
The speed of a ship or plane: 30 joints
If the major dimension between the two is identical, then the displacement of diamond pattern hull aircraft carrier is 80815 tons (332.9 meters of length overalls, the warship body is wide 40.8 meters, absorbs water 11.9 meters), lacks 10672 tons with the full load displacement of Nimitz level nuclear aircraft carrier, but about the same.The speed of a ship or plane that same main frame power calculates is 23.5 metre per second (m/s)s, closes 45 joints, than big 15 joints of the Nimitz level aircraft carrier speed of a ship or plane; The main frame power that calculates with the identical speed of a ship or plane is 75338 horsepowers, is 1/3.5th of Nimitz level aircraft carrier power (260000 horsepowers), this shows, uses the aircraft carrier of diamond pattern hull technology manufacturing and can save a large amount of fuel than Nimitz level nuclear aircraft carrier.
Below all be that the warship of perfect condition diamond pattern hull or the data of aircraft carrier and current actual warship or aircraft carrier compare, perfect condition is i.e. hypothesis drinking water diamond pattern hull smooth outer surface also, only considers the cross section water resistance, does not consider the water viscous force.In the real navigation of its tangible hull, hull is the effect that is subjected to cross section water resistance and two kinds of water resistances of water viscous force, but the cross section water resistance is than big many of water viscous force.Therefore relatively consider the water resistance effect of principal element cross section more than, and ignored the effect of secondary cause water viscous force.
Embodiment 4: for the naval vessel that needs the expanded letter cabin, also the head and the afterbody of hull base plate can be designed to wedge shape or sharp triangle, its middle part is rectangle or cydariform (Fig. 5).
Claims (3)
1. hull that reduces water resistance, it is made up of hull base plate and hull side plate, it is characterized in that: hull base plate (1) and hull drinking water partial parallel all are wedge shapes in the head and the afterbody of the cross-sectional plane of base plate, and the hull side plate (2) of drinking water part is perpendicular to hull base plate (1).
2. a kind of hull that reduces water resistance according to claim 1 is characterized in that: hull base plate (1) and hull drinking water partial parallel all are sharp triangles in the head and the afterbody of the cross-sectional plane of base plate.
3. a kind of hull that reduces water resistance according to claim 1 is characterized in that: have cambered surface excessive between the hull side plate (1) of drinking water part and the hull Texas deck (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520041787 CN2799391Y (en) | 2005-05-18 | 2005-05-18 | Ship body capable of reducing water resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520041787 CN2799391Y (en) | 2005-05-18 | 2005-05-18 | Ship body capable of reducing water resistance |
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| Publication Number | Publication Date |
|---|---|
| CN2799391Y true CN2799391Y (en) | 2006-07-26 |
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ID=36841885
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520041787 Expired - Fee Related CN2799391Y (en) | 2005-05-18 | 2005-05-18 | Ship body capable of reducing water resistance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114348221A (en) * | 2020-12-17 | 2022-04-15 | 茂名高新技术产业开发区嘉舟创新科技有限公司 | Head-tail tip round-bottom flat-front driving water airship |
-
2005
- 2005-05-18 CN CN 200520041787 patent/CN2799391Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114348221A (en) * | 2020-12-17 | 2022-04-15 | 茂名高新技术产业开发区嘉舟创新科技有限公司 | Head-tail tip round-bottom flat-front driving water airship |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060726 |