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Bulbous bow and hull

A bulbous bow and hull technology, applied in the field of ship design, can solve the problems of the bulbous bow’s ability to reduce wave-making resistance, not being strong, and increasing ship operating costs, so as to reduce propulsion power, reduce wave-making resistance, and reduce operating costs. cost effect

Inactive Publication Date: 2017-09-22
CSIC WUHAN SHIP & MARINE ENG EQUIP DESIGN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the prior art, the embodiment of the present invention provides a bulbous bow and hull, which is used to solve the problem that the capability of the bulbous bow to reduce the wave-making resistance is not strong during the running process of the medium-speed ship in the prior art. The propulsion power consumption of the ship is too large, which increases the operating cost of the ship

Method used

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  • Bulbous bow and hull

Examples

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Effect test

Embodiment 1

[0025] This embodiment provides a bulbous bow, such as figure 1 As shown, the height of the first end of the bulbous bow is greater than the height of the second end of the bulbous bow, so that the first end of the bulbous bow is upturned; and the height of the first end of the bulbous bow is higher than The full load line of the hull, so that when part of the bulbous bow is immersed in water, the additional resistance and wave breaking resistance are small.

[0026] see figure 1 , the upper surface of the bulbous bow is an arc surface, and the arc surface is concave from the first end of the bulbous bow to the second end of the bulbous bow, and the second end of the bulbous bow is in contact with the hull connected with the forward perpendicular line of the bow, so that the upper surface of the bulbous bow can form a diversion surface, so that the water flow to the stem of the hull has a downward component, which is more conducive to reducing the wave-making resistance of th...

Embodiment 2

[0035] Corresponding to Embodiment 1, this embodiment provides a hull, the hull is preferably a medium-speed ship, and the Fourier number Fr of the hull is 0.2-0.3. v is the speed of the ship, L is the length of the ship, and the bow of the hull is equipped with the bulbous bow provided by Embodiment 1, such as figure 1 As shown, the height of the first end of the bulbous bow is greater than the height of the second end of the bulbous bow; making the first end of the bulbous bow upturned; and the height of the first end of the bulbous bow is higher than The full load line of the hull, so that when part of the bulbous bow is immersed in water, the additional resistance and wave breaking resistance are small.

[0036] see figure 1 , the upper surface of the bulbous bow is an arc surface, and the arc surface is concave from the first end of the bulbous bow to the second end of the bulbous bow, and the second end of the bulbous bow is in contact with the hull connected with the...

Embodiment 3

[0045] In practical applications, the bulbous bow provided in Embodiment 1 can be applied to medium-speed ships, such as figure 1 As shown, the height of the first end of the bulbous bow is greater than the height of the second end of the bulbous bow; making the first end of the bulbous bow upturned; and the height of the first end of the bulbous bow is higher than The full load line of the hull, so that when part of the bulbous bow is immersed in water, the additional resistance and wave breaking resistance are small. In the present embodiment, the full load line of the hull is 6600WL.

[0046] see figure 1 , the upper surface of the bulbous bow is an arc surface, and the arc surface is concave from the first end of the bulbous bow to the second end of the bulbous bow, and the second end of the bulbous bow is in contact with the hull connected with the forward perpendicular line of the bow, so that the upper surface of the bulbous bow can form a diversion surface, so that t...

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Abstract

The invention provides a bulbous bow. The height of a first end of the bulbous bow is greater than that of a second end of the bulbous bow; the upper surface of the bulbous bow is a cambered surface; the cambered surface is concaved downward from the first end of the bulbous bow to the second end of the bulbous bow, so that the second end of the bulbous bow is connected with a fore perpendicular of a hull; and the upper surface of the bulbous bow is the cambered surface, and the cambered surface is concaved downward from the first end of the bulbous bow to the second end of the bulbous bow, so that the first end of the bulbous bow is in a tilting type, a diversion surface can be formed on the surface of the bulbous bow, the water quantity flowing to a stem post of the hull has a downward component, the reduction of wave making resistance of the stem of the hull is facilitated, the propulsion power of a vessel is reduced, and the operation cost of the hull is reduced.

Description

technical field [0001] The invention relates to the technical field of ship design, in particular to a bulbous bow and a hull. Background technique [0002] When the ship is sailing, there will be wave-making resistance. When the ship is sailing, waves will be generated on the water surface, and a set of wave systems will be generated near the bow and stern. Each wave system includes shear waves and scattered waves. The shear wave is roughly perpendicular to the course, and the scattered wave is oblique to the course. The energy of the ship's undulating waves is supplied by the hull, which consumes a part of the power to propel the ship. For the ship, it is equivalent to overcoming a certain resistance, which is called wave-making resistance. [0003] In order to weaken this kind of wave-making, a bulbous bow is generally installed at the bow of the ship when designing a ship, but for a medium-speed ship, the ordinary bulbous bow is not strong enough to weaken the wave-mak...

Claims

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Application Information

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IPC IPC(8): B63B1/06
CPCB63B1/063Y02T70/10
Inventor 万智琦汤云溪黄晓琼杨丽琼胡磊罗清胡克伟张建鹏罗英勤郑余
Owner CSIC WUHAN SHIP & MARINE ENG EQUIP DESIGN
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