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Method and device for reducing wave-making resistance and friction force during ship navigation

A technology of wave resistance and friction, applied in the field of water navigation, can solve problems such as limited bulbous bow performance, achieve the effects of reducing wave resistance, improving maneuverability, and increasing air content

Inactive Publication Date: 2020-04-07
DALIAN FISHING +3
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Problems solved by technology

[0010] The bulbous bow is mainly to reduce the wave-making resistance, and it is widely used in large ships, but the performance that the bulbous bow can improve is limited

Method used

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  • Method and device for reducing wave-making resistance and friction force during ship navigation
  • Method and device for reducing wave-making resistance and friction force during ship navigation
  • Method and device for reducing wave-making resistance and friction force during ship navigation

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Embodiment Construction

[0054] Such as figure 1 , 2 , 3, the method of the present invention to reduce wave resistance and friction when the ship is sailing is to inject a gas-water mixture containing bubbles to the front end of the ship A or / and the waters on both sides of the ship (the arrow in the figure indicates the direction of injection) .

[0055] In the air-water mixture, the air accounts for 10%-60% by volume, preferably, the air accounts for 40%.

[0056] Preferably, when injecting the mixture of air and water containing air bubbles into the waters on both sides of the ship, try to only inject the air-water mixture containing air bubbles into the waters in the front of the hull, that is to say, the injection position does not exceed the position of the hull. In the middle, avoid bubbles bursting to damage the propeller and other devices at the stern of the ship. Special ships, such as tugboats, can also inject an air-water mixture into the water at the middle and rear of the hull.

[...

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Abstract

The invention discloses a method and device for reducing wave-making resistance and friction force during ship navigation. The device comprises a gas-liquid mixing device and a control device which are connected, wherein the gas-liquid mixing device is provided with a water inlet, a gas inlet, a water outlet and the gas-liquid mixing cavity arranged between the water inlet and the water outlet; water and gas respectively enter the gas-liquid mixing cavity through the water inlet and the gas inlet; the control device controls air intake of the gas inlet; in the process, the water inlet is controlled to intermittently pause water feeding or intermittently feed water at a low speed or feed water at a low speed all the time; therefore, more gas can enter the gas-liquid mixing cavity; the gas-liquid mixing device can generate a gas-water mixture containing a large number of bubbles; the gas-water mixture is injected into a water area at the front end of a ship or / and on the two sides of theship, so that the water density of the water area can be greatly reduced, the sailing speed of the ship and the maneuverability of the ship can be greatly improved, or the fuel consumption is greatlyreduced at the same sailing speed, and the performance of the ship is greatly improved.

Description

technical field [0001] The invention relates to the technical field of water navigation such as ships and warships, and in particular to a method and a device for reducing wave-making resistance and friction when ships sail. Background technique [0002] Ocean transportation has always been an important mode of international trade and transportation, accounting for more than 70%. my country is also the country with the largest international transportation demand. A large number of ships sail on the sea and rivers. When ships sail, due to the large resistance of water, Thereby will reach certain sailing speed, and energy consumption is huge. [0003] Naval ships are important equipment for the country to go deep blue, shouldering the dignity of the country and the nation, high maneuverability, fast speed, and low fuel consumption are the symbols of naval modernization. In order to achieve these properties, most of the traditional research directions are to improve the perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B1/38
CPCB63B1/38B63B2001/387Y02T70/10B63B2001/385
Inventor 韩继亮徐占鹏刘广树贾雪妮
Owner DALIAN FISHING
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